| quantitation of ranaviruses in cell culture and tissue samples. | a quantitative real-time pcr (qpcr) based on a standard curve was developed for detection and quantitation of ranaviruses. the target gene for the qpcr was viral dna polymerase (dnapol). all ten ranavirus isolates studied (epizootic haematopoietic necrosis virus, ehnv; european catfish virus, ecv; european sheatfish virus, esv; frog virus 3, fv3; bohle iridovirus, biv; doctor fish virus, dfv; guppy virus 6, gv6; pike-perch iridovirus, ppiv; rana esculenta virus italy 282/i02, rev282/i02 and shor ... | 2010 | 21087639 |
| non-dioxin-like pcbs in ten different fish species from the danube river in serbia. | this work has been developed to examine the level of non-dioxin-like (ndl) pcbs (28, 52, 101, 138, 153 and 180) in (a) ten different freshwater fish species from the danube river, (b) two sampling points: up and downstream of the industrial zone of the city of pancevo (ecological hot spot in serbia) and (c) two time points i.e., in 2001 and 2006. obtained results would serve to analyse spatial, temporal and congener profile characteristics of ndl pcbs cumulated in fish tissues due to environment ... | 2010 | 21161586 |
| differential diagnosis of triaenophorus crassus and t. nodulosus experimental infection in cyclops abyssorum praealpinus (copepoda) from the alpine lake grundlsee (austria) using pcr-rflp. | in 2005, an epidemic of the cestode triaenophorus crassus in arctic charr, salvelinus umbla from lake grundlsee (austria) was reported, resulting in the closure of the local fisheries. the parasite uses a copepod and a salmonid fish as intermediate hosts, and the european pike (esox lucius) as definitive host. in lake grundlsee procercoids of t. crassus, t. nodulosus and eubothrium salvelini use the copepod cyclops abyssorum praealpinus as their first intermediate host. we report on the developm ... | 2011 | 21424806 |
| arsenic concentration and speciation in five freshwater fish species from back bay near yellowknife, nt, canada. | the concentration of total arsenic and five different arsenic species [as(iii), as(v), monomethylarsonic acid (mma), dimethylarsenic acid (dma), and arsenobetaine (asb)], were measured in the muscle, liver and gastrointestinal tract (git) of five different fish species [lake whitefish (coregonus clupeaformis), walleye (stizostedion vitreum), northern pike (esox lucius), white sucker (catostomus commersoni) and longnose sucker (catostomus catostomus)] from back bay, great slave lake, near the cit ... | 2008 | 18214701 |
| Temporal change estimation of mercury concentrations in northern pike (Esox lucius L.) in Swedish lakes. | Adequate temporal trend analysis of mercury (Hg) in freshwater ecosystems is critical to evaluate if actions from the human society have affected Hg concentrations ([Hg]) in fresh water biota. This study examined temporal change in [Hg] in Northern pike (Esox lucius L.) in Swedish freshwater lakes between 1994 and 2006. To achieve this were lake-specific, multiple-linear-regression models used to estimate pike [Hg], including indicator variables representing time and fish weight and their intera ... | 2011 | 22014468 |
| first detection of pike fry-like rhabdovirus in barbel and spring viraemia of carp virus in sturgeon and pike in aquaculture in the czech republic. | rapid antigen detection enzyme-linked immunosorbent assay (elisa) testing of cell cultures with organ homogenate from fish, collected from farms with a predominance of common carp or in natural aquaculture in the czech republic between 1995 and 2008, identified piscine vesiculovirus in 27 of 178 samples. using reverse transcription semi-nested pcr, targeting a 550 nucleotide region of the glycoprotein (g) gene, piscine vesiculovirus was confirmed in 23 of the 27 organ samples diagnosed by elisa ... | 2011 | 21848117 |
| Molecular and Phenotypic Evidence of a New Species of Genus Esox (Esocidae, Esociformes, Actinopterygii): The Southern Pike, Esox flaviae. | We address the taxonomic position of the southern European individuals of pike, performing a series of tests and comparisons from morphology, DNA taxonomy and population genetics parameters, in order to support the hypothesis that two species of pike, and not only one, exist in Europe. A strong relationship emerged between a northern genotype supported by COI, Cytb, AFLP and specific fragments, and a phenotype with round spot skin colour pattern and a large number of scales in the lateral line, ... | 2011 | 22164201 |
| high sensitivity of northern pike larvae to uv-b but no uv-photoinduced toxicity of retene. | in order to investigate whether increased uv-b radiation is a risk factor, a series of acute laboratory experiments was conducted with larval stages of the northern pike (esox lucius l.), hatching in nordic waters in may. further, a comparative investigation on the acute phototoxicity of retene (7-isopropyl-1-methylphenanthrene), a pah compound recently revealed to posses uv-b-induced phototoxicity in larval coregonids, was conducted with pike larvae. in semi-static experiment, larvae were pre-e ... | 2004 | 15168947 |
| type c virus in lymphosarcoma in northern pike (esox lucius). | | 1999 | 59315 |
| [malignant lymphomas of various histological types in pike from the eastern portion of the baltic sea]. | malignant lymphomas have been found in pikes (esox lucius l.) caught in the eastern part of the baltic sea. the frequency of the disease has increased in recent years. three different histological types of malignant lymphoma are described in 32 pikes: poorly differentiated diffuse lymphocytic lymphoma, mixed (histiocytoid-lymphocytic) diffuse lymphoma and undifferentiated (anisomorphic) diffuse lymphoma. | 2011 | 3053150 |
| microwave-assisted double insert vapour-phase digestion of organic samples. | a microwave-assisted double insert multimode vapour-phase digestion method was developed for the digestion of organic samples. the experimental set-up was based on a third generation-type teflon microwave vessel, equipped with an automatic pressure regulating type vessel cover. a borosilicate glass holder insert, containing a smaller quartz sample insert, was fitted inside the vessel. sulphuric acid was added to the holder insert as a microwave absorbing and temperature transferring liquid, whic ... | 2009 | 19185121 |
| determination of polychlorinated biphenyls and total mercury in two fish species (esox lucius and carassius auratus) in anzali wetland, iran. | the anzali wetland is one of the most important ecosystems in the north of iran, and parts of it were registered as a ramsar site in 1975. however, even though, due to many problems, including eutrophication produced by inflow of excess nutrients and organic materials, the wetland was also listed on the montreux record indicating the need to take urgent remedial action. this study was conducted to study the levels of polychlorinated biphenyls (pcbs) and total mercury (thg) in two fish species (e ... | 2011 | 21713472 |
| multiple isotope analyses of the pike tapeworm triaenophorus nodulosus reveal peculiarities in consumer-diet discrimination patterns. | previous studies of dietary isotope discrimination have led to the general expectation that a consumer will exhibit enriched stable isotope levels relative to its diet. parasite-host systems are specific consumer-diet pairs in which the consumer (parasite) feeds exclusively on one dietary source: host tissue. however, the small numbers of studies previously carried out on isotopic discrimination in parasite-host (δxp-ht) systems have yielded controversial results, showing some parasites to be is ... | 2015 | 24451479 |
| investigation of parasites of pikes (esox lucius linnaeus, 1785) from chamkhale river, anzali and amirkelayeh wetlands, iran. | to investigate the health status, the parasite diversity and abundance were studied in three pike populations. for this purpose, totally 90 fish were caught from three natural habitats of pike including chamkhale river, anzali and amirkelayeh wetlands, iran. after biometry and age determination, fish were dissected and parasites were investigated in intestine, gill and eye. according to results, five parasite species were identified in whole body of pikes including eustrongylides exises, raphida ... | 2016 | 27605833 |
| [ecological and biochemical aspects of parasite-host interactions in transformed aquatic bodies: a case study of the cestode triaenophorus nodulosus and its host, the northern pike esox lucius]. | the lysosomal enzyme activities of the cestode triaenophorus nodulosus and its host, the pike, in-aquatic bodies with different degrees of technogenic transformation (northern karelia, russia) have been studied. as has been shown, iron-ore waste causes an increase in the acid phosphatase, nuclease, and beta-galactosidase activities of the host and a decrease in its beta-glucosidase and cathepsin d activities. as a rule, the changes in the same cestode enzyme activities are the opposite. with a d ... | 2016 | 26349236 |
| impact of the cestode triaenophorus nodulosus on the exotic lepomis gibbosus and the autochthonous perca fluviatilis. | the effects of plerocercoids of the cestode triaenophorus nodulosus infecting the livers of native eurasian perch perca fluviatilis and non-native pumpkinseed lepomis gibbosus was investigated in 17 sites along the moselle watershed. with a single exception, infected individuals were not observed in the main channel whether or not northern pike esox lucius, a final host, was present. in ponds where the pike was present, the prevalence of t. nodulosus averaged 86% in eurasian perch and 15% in pum ... | 2015 | 25475253 |
| experimental transmission of vhsv genotype ivb by predation. | preliminary surveillance of wild baitfish during the 2006 viral hemorrhagic septicemia virus genotype ivb (vhsv ivb) outbreaks indicated emerald shiners notropis atherinoides and bluntnose minnow pimephales notatus were infected with high levels of vhsv without showing clinical signs of disease. the movement and use of baitfish was recognized as the most probable vector for the introduction of vhsv to inland waters, such as conesus lake and skaneateles lake in new york, budd lake in michigan, an ... | 2013 | 23998650 |
| a novel, endogenous inhibitor of 7-ethoxyresorufin-o-deethylase activity isolated from liver cytosolic fractions of bream (abramis brama l.). | the cytosolic supernatant of bream (abramis brama l.) liver homogenates inhibits the 7-ethoxyresorufin-o-deethylase (erod) activity of pike (esox lucius) microsomal fractions. the inhibitor shows no activity against 7-ethoxycoumarin-o-deethylase and benzo(a)pyrene hydroxylase indicating a high isoenzyme specificity. the inhibiting component is a heat-sensitive substance (56 degrees c for 5') which is not self regenerating after subsequent cooling. it can be isolated from the cytosolic fraction u ... | 1999 | 10582324 |
| cylindroid lamella-particle complexes and nucleoid intracytoplasmic bodies in lymphoma cells of northern pike (esox lucius). | | 1982 | 185652 |
| environmental factors regulate the effects of roach rutilus rutilus and pike esox lucius on perch perca fluviatilis populations in small boreal forest lakes. | in this study of 18 small boreal forest lakes, the effects of abiotic and biotic factors (roach rutilus rutilus and pike esox lucius) on various population variables of perch perca fluviatilis were examined. as a single variable, the gillnet catch per unit effort (cpue) of r. rutilus was negatively related to the mean mass of small (< 200 mm) and the growth rate of young (1-2 years) p. fluviatilis. the mean mass of large (> or = 200 mm) p. fluviatilis was the highest at intermediate cpue of r. r ... | 2010 | 20537014 |
| distribution of metals (fe, mn, zn, cu) in fish tissues in two lakes of different trophy in northwestern poland. | this study presents concentrations of iron, manganese, zinc, and copper in selected tissues of two fish species: pike (esox lucius l.) and bream (abramis brama l.) living in lakes ińsko and wisola, northwestern poland. the lakes differ in their trophic status. the effect of gender and environmental conditions on metals accumulation was also investigated. metal analyses were performed using inductively coupled plasma atomic emission spectroscopy. considering all studied fish species and tissues, ... | 2013 | 22923375 |
| prevalence of diphyllobothrium latum (cestoda: diphyllobothriidae) plerocercoids in fish species from four italian lakes and risk for the consumers. | in recent years there has been a re-emergence of diphyllobothriasis by diphyllobothrium latum (cestoda: diphyllobothriidae) in italy, france and switzerland, where in the past this fish-borne zoonosis was widespread and then virtually disappeared. a change in eating habits such as the consumption of raw/undercooked freshwater fish, has led to an increased risk for consumers of ingesting infective larvae of d. latum. a survey on the factors responsible for the re-emergence of human diphyllobothri ... | 2016 | 27491055 |
| impact of pulp and paper mill effluent on egg hatchability of pike (esox lucius l.). | | 2013 | 3708178 |
| cross-species comparison of relative potencies and relative sensitivities of fishes to dibenzo-p-dioxins, dibenzofurans, and polychlorinated biphenyls in vitro. | dioxin-like compounds of varying toxicities are found in complex mixtures. the toxic equivalency factor (tef) approach was developed based on the potency of a dioxin-like compound relative to the potency of 2,3,7,8-tetrachloro-dibenzo-p-dioxin (tcdd) to streamline risk assessment. one limitation of the tef approach is uncertainty regarding differences in the relative potency of dioxin-like compounds among different species. relative potencies among fishes are limited, relative to relative potenc ... | 2016 | 26202062 |
| rhipidocotyle fennica (digenea: bucephalidae) from anodonta anatina and pike esox lucius in lithuania. | ribosomal dna sequences of rhipidocotyle sp. adults from esox lucius were shown to be identical to sequences of larval rhipidocotyle fennica, occurring in anodonta anatina in lake vilkokšnis, lithuania. morphological features and host specificity of this adult worm correspond with that, determinate in the first description of r. fennica in finland. these data give the first evidence that a viable population of r. fennica exists in east central europe. bucephalus polymorphus which was reported in ... | 2014 | 25190013 |
| bioaccumulation of heavy metals and microelements in silver bream (brama brama l.), northern pike (esox lucius l.), sterlet (acipenser ruthenus l.), and common carp (cyprinus carpio l.) from tisza river, serbia. | the aim of this study was to determine the concentrations of al, as, b, cd, co, cr, cu, fe, hg, mn, ni, pb, se, sr, and zn in liver, gills, gonads, and brain of four ecologically different fish species in serbia: piscivorous northern pike, benthivorous sterlet and silver bream, and omnivorous common carp. fish were caught at four sites along the stretch of the river tisza in the pannonian part of serbia during october 2010. results revealed that heavy metals and microelements with the highest va ... | 2015 | 26039743 |
| comparison of the sensitivity of four native canadian fish species to 17-α ethinylestradiol, using an in vitro liver explant assay. | exposure to environmental estrogens and other endocrine-active chemicals can impact reproduction of freshwater fishes. while extensive data exists regarding the effect of estrogens on standard laboratory species, little is known about the sensitivity of freshwater fishes native to north america to these compounds. current testing strategies for the toxicological assessment of contaminants still rely heavily on studies with live animals, which poses increasing concerns from an economical and ethi ... | 2015 | 26304805 |
| identification of cryptosporidium species in fish from lake geneva (lac léman) in france. | cryptosporidium, a protozoan parasite that can cause severe diarrhea in a wide range of vertebrates including humans, is increasingly recognized as a parasite of a diverse range of wildlife species. however, little data are available regarding the identification of cryptosporidium species and genotypes in wild aquatic environments, and more particularly in edible freshwater fish. to evaluate the prevalence of cryptosporidiumspp. in fish from lake geneva (lac léman) in france, 41 entire fish and ... | 2015 | 26213992 |
| origins and functional diversification of salinity-responsive na(+) , k(+) atpase α1 paralogs in salmonids. | the salmoniform whole-genome duplication is hypothesized to have facilitated the evolution of anadromy, but little is known about the contribution of paralogs from this event to the physiological performance traits required for anadromy, such as salinity tolerance. here, we determined when two candidate, salinity-responsive paralogs of the na(+) , k(+) atpase α subunit (α1a and α1b) evolved and studied their evolutionary trajectories and tissue-specific expression patterns. we found that these p ... | 2014 | 24917532 |
| hematological parameters associated with parasitism in pike, esox lucius caught from anzali wetland. | this study involved 120 pike, esox lucius, captured from anzali wetland. parasite fauna were identified in captured fish. also, changes of haematological parameters were compared both infected and uninfected fish. parasitological inspections revealed the following infestations: skin: lernea cyprinacea, argulus foliaceus (crustacean) and tricodina sp. (ciliatea). gill: dactylogyrus sp. (digenea) and tetraonchus monenteron (monogenea). eye: diplostomum spathaceum (digenea). gut: eustrongylides exi ... | 2015 | 26064009 |
| content of polychlorinated dibenzo-p-dioxins, dibenzofurans and dioxin-like polychlorinated biphenyls in fish from latvian lakes. | seventeen polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (pcdd/pcdfs) of the highest priority as well as twelve dioxin-like polychlorinated biphenyls (dl-pcbs) were analyzed in the muscle tissues of the following freshwater fish species sampled from eleven latvian freshwater lakes: perch (perca flavescens), carp (cyprinus carpio), eel (anguilla rostrata), bream (abramis brama), chub (leuciscus cephalus), pike (esox lucius), sheatfish (silurus glanis) and roach (rutilus). to ... | 2013 | 23336927 |
| morphological and genetic characteristics of the anisakid nematode raphidascaris acus from the southwest caspian sea: evidence for the existence of sibling species within a species complex. | recently, it has been shown that many nematode species are in fact species complex, using exact morphological and genetic studies. in this case, there are no such studies related to the genus raphidascaris railliet & henry, 1915. herein, the morphological and genetic variations among the iranian population of the species raphidascaris acus (bloch, 1779) railliet & henry, 1915 and the other allopatric populations with morphological and genetic information were compared to show whether this specie ... | 2014 | 24980652 |
| concentrations of microcystins in tissues of several fish species from freshwater reservoirs and ponds. | the aim of this study is to summarise the determination of concentrations of microcystins (mcs) in muscle and liver of freshwater fish species caught in stagnant waters of the czech republic. within the years 2007-2009, 351 muscle samples and 291 liver samples of 16 freshwater fish species derived from four fishponds, and four water reservoirs were analysed. mcs were detected in 53 liver samples. the highest concentrations of microcystins were determined in liver samples of carnivorous fish spec ... | 2013 | 23756815 |
| tissue alkaline phosphatase activity in selected freshwater teleosts. | 1. kinetic studies of tissue alkaline phosphatase activity were carried out on eight species of teleost fishes taken from the mississippi river. 2. liver alkaline phosphatase activity expressed in mumoles of p-nitrophenol released per minute per gram of protein were as follows: micropterus salmoides, 20.31; stizostedion vitreum, 19.22; pomoxis nigromaculatus, 18.76; lepisosteus platostomus, 16.26; esox lucius, 16.14; hiodon tergisus, 13.83; ictalurus punctatus, 10.87; aplodinotus grunniens, 7.94 ... | 1978 | 318337 |
| determination of moderately polar arsenolipids and mercury speciation in freshwater fish of the river elbe (saxony, germany). | arsenic and mercury are frequent contaminants in the environment and care must be taken to limit their entrance into the food chain. the toxicity of both elements strongly depends upon their speciation. total amounts of as and hg as well as their species were analyzed in muscle and liver of 26 fishes of seven freshwater fish species caught in the river elbe. the median concentrations of as were 162 μg kg(-1) w.w. in liver and 92 μg kg(-1) w.w. in muscle. the median concentrations of total hg wer ... | 2016 | 26552521 |
| factors affecting antioxidant response in fish from a long-term mercury-contaminated reservoir. | the objective of this work was to evaluate antioxidant defence and oxidative damage in organs (liver, gills, kidney, and brain) of five fish species (aspius aspius, esox lucius, sander lucioperca, abramis brama, rutilus rutilus) from the long-term mercury-contaminated skalka reservoir in the czech republic. special emphasis was placed on a comprehensive assessment of the factors that may affect the antioxidant response to mercury in fish. antioxidant enzymes (glutathione reductase, glutathione p ... | 2015 | 26276034 |
| comparative study of acetylcholinesterase and butyrylcholinesterase in brain and serum of several freshwater fish: specific activities and in vitro inhibition by ddvp, an organophosphorus pesticide. | a comparative study of specific activities and in vitro inhibition of brain and serum acetylcholinesterase (ache; ec 3.1.1.7) and serum butyrylcholinesterase (bche; ec 3.1.1.8) by ddvp, an organophosphorus pesticide, was conducted in 11 freshwater teleost species belonging to four families (cyprinidae; common carp cyprinus carpio, bream abramis brama, blue bream a. ballerus, white bream blicca bjoerkna, roach rutilus rutilus, bleak alburnus alburnus, ide leuciscus idus; percidae: perch perca flu ... | 2000 | 11246494 |
| [effect of the heart electric stimulation on repolarization of fish and amphibian ventricular myocardium]. | by the method of synchronous multielectrode cartography (24-unipolar leads), distribution of durations and time of end of repolarization were studied on ventricular epicardium of pikes (esox lucius) and frogs (rana esculenta) and in ventricular intramural layers of toads (bufo bufo) at the ectopic heart excitation. the time of arrival of the excitation wave and of the end of repolarization in each lead was determined from the minimum of time derivative of potential at the period of the qrs compl ... | 2013 | 23789398 |
| rotenone formulation fate in lake davis following the 2007 treatment. | in september 2007, lake davis (near portola, california) was treated by the california department of fish and game with cft legumine, a rotenone formulation, to eradicate the invasive northern pike (esox lucius). the objective of this report is to describe the fate of the five major formulation constituents-rotenone, rotenolone, methyl pyrrolidone (mp), diethylene glycol monethyl ether (degee), and fennedefo 99-in water, sediment, and brown bullhead catfish (ameiurus nebulosus; a rotenone-resist ... | 2012 | 22407799 |
| fish communities in coastal freshwater ecosystems: the role of the physical and chemical setting. | we explored how embayment watershed inputs, morphometry, and hydrology influence fish community structure among eight embayments located along the southeastern shoreline of lake ontario, new york, usa. embayments differed in surface area and depth, varied in their connections to lake ontario and their watersheds, and drained watersheds representing a gradient of agricultural to forested land use. | 2008 | 19114002 |
| skeletal elements within teleost eyes and a discussion of their homology. | scleral ossicles and scleral cartilages form part of the craniofacial skeleton of many vertebrates. some vertebrates, including all birds and most reptiles, but excluding most mammals, have scleral cartilages as well as scleral ossicles supporting their eyes. the teleost equivalent of these elements has received little attention in the literature. from radiographic and whole-mount analyses of over 400 individuals from 376 teleost species, we conclude that the teleost scleral skeletal elements (o ... | 2006 | 17051547 |
| the development and mature structure of dentine in the pike, esox lucius, analyzed by bright field, phase and polarization microscopy. | | 2016 | 4918183 |
| mercury and selenium concentrations in muscle tissue of different species of predatory freshwater fish and correlation between these elements. | concentrations of total mercury and selenium were determined in 49 and 42 muscle tissue samples, respectively, of six species of predatory freshwater fish, dace (leuciscus leuciscus), pike perch (sander lucioperca), pike (esox lucius), european catfish (silurus glanis), rainbow trout (oncorhynchus mykiss) and asp (aspius aspius). muscle selenium concentration did not correlate with the corresponding total mercury concentration (r² < 0.198) in all examined predatory fish species. there was an inv ... | 2012 | 24779785 |
| comparative study of acetylcholine synthesis in organs of freshwater teleosts. | the activity of acetylcholine (ach) synthesizing enzyme, choline acetyltransferase (chat), and the content of ach were determined in the brain, heart, red trunk muscle and midgut of 12 freshwater teleost species belonging to eight families: carp (cyprinus carpio), tench (tinca tinca), silver carp (hypophthalmichtys molitrix), bighead (hypophthalmichtys nobilis), wels (silurus glanis), cat fish (ictalurus nebulosus), eel (anguilla anguilla), rainbow trout (oncorhynchus mykiss), pike (esox lucius) ... | 1991 | 24214667 |
| [analysis of parasitic communities in fishes from lake baikal]. | analysis of infracommunities and component communities of fish parasites in lake baikal has been conducted for the first time. it has been revealed that parasite infracommunities for the majority of baikal fishes are weakly balanced and impoverished (the berger-parker index is > 0.5; evension is < 0.5; the brillouin index is < 1). the highest diversity and balance of the communities are characteristic for carnivorous fishes (brachymystax lenok, hucho taimen, thymallus arcticus, esox lucius, and ... | 2007 | 16755724 |
| relationship among mercury concentration, growth rate, and condition of northern pike: a tautology resolved? | methylmercury is a bioaccumulative contaminant that biomagnifies in aquatic food webs and adversely affects the health of freshwater fish. previous studies have documented an inverse relationship between fish condition and concentration of mercury in fish. however, this relationship may be a result of slow-growing fish accumulating large amounts of methylmercury rather than the effects of methylmercury on fish condition and growth. an evaluation was conducted of the relationship among fish condi ... | 2016 | 27283506 |
| biomonitoring of polychlorinated biphenyls (pcbs) in heavily polluted aquatic environment in different fish species. | the distribution and concentrations of polychlorinated biphenyls (pcbs) were determined in fish species (european perch perca fluviatilis, northern pike esox lucius, pike perch sander lucioperca, wels catfish silirus glanus, common carp cyprinus carpio, european eel anguilla anguilla, freshwater bream abramis brama, goldfish carassius auratus, and roach rutilus rutilus) in a heavily polluted water reservoir zemplínska šírava (slovakia). the study performed at two different time points 5 years ap ... | 2012 | 22173787 |
| towards the conservation of crucian carp carassius carassius: understanding the extent and causes of decline within part of its native english range. | the extent and causes of crucian carp carassius carassius decline were assessed during an initial study of c. 25 ponds in north norfolk, eastern england, u.k., which was then replicated (a validation study) on another c. 25 ponds in an adjacent area. of these ponds, c. 40 are known to have contained c. carassius during the 1970s-1980s. in the initial and validation studies, c. carassius were found in only 11 of these ponds, yielding declines of 76% (five of 21 ponds) and 68% (six of 19 ponds), r ... | 2011 | 22136242 |
| potential of environmental dna to evaluate northern pike (esox lucius) eradication efforts: an experimental test and case study. | determining the success of invasive species eradication efforts is challenging because populations at very low abundance are difficult to detect. environmental dna (edna) sampling has recently emerged as a powerful tool for detecting rare aquatic animals; however, detectable fragments of dna can persist over time despite absence of the targeted taxa and can therefore complicate edna sampling after an eradication event. this complication is a large concern for fish eradication efforts in lakes si ... | 2016 | 27626271 |
| allometric scaling of intraspecific space use. | allometric scaling relationships enable exploration of animal space-use patterns, yet interspecific studies cannot address many of the underlying mechanisms. we present the first intraspecific study of home range (hr) allometry relative to energetic requirements over several orders of magnitude of body mass, using as a model the predatory fish, pike esox lucius. analogous with interspecific studies, we show that space use increases more rapidly with mass (exponent = 1.08) than metabolic scaling ... | 2016 | 26979558 |
| heavy metal bioaccumulation in different tissues of two fish species with regards to their feeding habits and trophic levels. | heavy metals residues (i.e. cu, zn, mn, and pb) were determined in seven chosen tissues of two fish species (esox lucius and carassius auratus) from anzali wetland. the impact of feeding habit on metal accumulations in different tissues as well as the respective contribution of water and food to matel uptake by fishes were considered. no tendency for bioamplification was observed for the metals along the wetland trophic levels. generally, there was no statistically significant relationship betwe ... | 1995 | 24202342 |
| using accelerometry to quantify prey attack and handling behaviours in piscivorous pike esox lucius. | accelerometer technology was used to evaluate behaviours in the teleost ambush predator pike esox lucius foraging on crucian carp carassius carassius. automated rule-based estimates of prey-size determined handling time were obtained and are compared with video-recorded behaviours. solutions to tag attachment and the limitations imposed by battery-time and data-logging capacities are evaluated. | 2017 | 28393360 |
| [effect of temperature on proteinase activities of enteral microbiota and intestinal mucosa of fish of different ecological group]. | effect of temperature on proteinases activities of enteral microbiota and of intestinal mucosa was studied in five fish species (roach rutilus rutilus, crucian carp carassius carassius, common perch perca fluviatilis, pike-perch zander lucioperca, and pike esox lucius) belonging by the nutrition type to different ecological groups. essential differences of temperature characteristics of proteinases of intestinal mucosa and of enteral microbiota are revealed in fish belonging by the nutrition typ ... | 2012 | 22645973 |
| predator-induced phenotypical change in body morphology in crucian carp. | in a field experiment where the presence or absence of piscivorous pike (esox lucius) in ponds was manipulated, the morphology of crucian carp (carassius carassius) diverged, such that individuals became deeper bodied in pond sections with pike. a laboratory experiment confirmed that the presence of this predator induced a change in body morphology in the carp. estimation of prey vulnerability to predation by pike, a gape-limited predator, revealed that this increase in body depth resulted in cr ... | 1992 | 17778362 |
| predator-induced morphology enhances escape locomotion in crucian carp. | fishes show a remarkable diversity of shapes which have been associated with their swimming abilities and anti-predator adaptations. the crucian carp (carassius carassius) provides an extreme example of phenotypic plasticity in body shape which makes it a unique model organism for evaluating the relationship between body form and function in fishes. in crucian carp, a deep body is induced by the presence of pike (esox lucius), and this results in lower vulnerability to gape-limited predators, su ... | 2008 | 17971327 |
| genetic characterization of esocid herpesvirus 1 (eshv1). | blue spot disease, believed to be caused by esocid herpesvirus 1 (eshv1), has been observed in wild northern pike esox lucius in a number of cold-water locations, including the northern usa, canada, and ireland. in the spring of 2014, a northern pike was caught in wisconsin displaying the characteristic bluish-white circular plaques on the dorsum and fins. microscopic examination of hematoxylin and eosin-stained sections of the proliferative cutaneous lesions revealed a focally extensive abundan ... | 2016 | 27901499 |
| trading off safety against food: state dependent habitat choice and foraging in crucian carp. | the influence of hunger level and predation risk on habitat choice and foraging in crucian carp, carassius carassius, were studied in a laboratory experiment. experiments were carried out in aquaria with or without a predator (pike, esox lucius). habitat use and foraging activity of three-fish foraging groups of either fed or hungry crucian carp were studied. fish were allowed to choose between an open (risky) habitat with tubifex worms and a habitat with dense vegetation (safe) without food. ha ... | 1993 | 28314010 |
| perfluoroalkylphosphinic acids in northern pike (esox lucius), double-crested cormorants (phalacrocorax auritus), and bottlenose dolphins (tursiops truncatus) in relation to other perfluoroalkyl acids. | perfluoroalkyl phosphinic acids (pfpias) are perfluoroalkyl acids (pfaas) that are used for their surfactant properties in a variety of applications, resulting in their presence in environmental waters; however, they have not been widely studied in biota. a survey of pfpias was conducted in fish, dolphins, and birds from various locations in north america. northern pike (esox lucius) were collected at two locations in 2011 near montréal island in the st. lawrence river, canada, double-crested co ... | 2016 | 27677975 |
| composition of seminal plasma and ovarian fluid in ide leuciscus idus and northern pike esox lucius. | seminal plasma (sp) and ovarian fluid (of) plays an important role as storage media to prevent the activation of gametes both in vivo and under artificial conditions. the objectives of this study were to quantify gamete biochemistry and explore correlations among quantitative characteristics of sp, of and sperm performance traits of ide leuciscus idus and northern pike esox lucius. generally, na(+) , k(+) and cl(-) were found to be the most dominating ions, although concentrations of k(+) were h ... | 2016 | 27650321 |
| simultaneous determination of substituted diphenylamine antioxidants and benzotriazole ultra violet stabilizers in blood plasma and fish homogenates by ultra high performance liquid chromatography-electrospray tandem mass spectrometry. | analytical methods were developed for the determination of eight substituted diphenylamines (sdpas) and six benzotriazole uv stabilizers (bzt-uvs) in blood plasma and fish homogenate matrices. liquid-liquid extraction by methyl tert-butyl ether and denaturation by koh following silica gel packed column clean-up was employed for blood plasma preparation. for the fish homogenate samples, ultrasonic assisted solvent extraction combined with automated gel permeation chromatography and silica gel pac ... | 2016 | 27425756 |
| bioaccumulation of heavy metals in freshwater fish species, anzali, iran. | the main objectives of study were to monitor the metals concentrations, in freshwater fish species, carassius gibelio and esox lucius; and to identify any relationships between species and bioaccumulation of metals. the highest concentration of metals (cadmium, 1.96; copper, 24.2; zinc, 49.6; lead, 5.4; chromium, 4.4) between the fish species and tissues was in the liver of esox lucius, while the lowest (cadmium,0.21; copper,7.2; zinc,19.4; lead,0.9; chromium,0.6 μg/g) found in the muscle of car ... | 2011 | 21858708 |
| environmental contaminants in fish and their associated risk to piscivorous wildlife in the yukon river basin, alaska. | organochlorine chemical residues and elemental contaminants were measured in northern pike (esox lucius), longnose sucker (catostomus catostomus), and burbot (lota lota) from 10 sites in the yukon river basin (yrb) during 2002. contaminant concentrations were compared to historical yrb data and to toxicity thresholds for fish and piscivorous wildlife from the scientific literature. a risk analysis was conducted to screen for potential hazards to piscivorous wildlife for contaminants that exceede ... | 2006 | 17009129 |
| [the relative duration of similar periods in the early embryogenesis of teleosts]. | the absolute (in min.) and relative (in the number of tau0) duration of the periods of cleavage, epiboly and that between the onset of gastrulation and the stage of 10 pairs of somites were determined in cyprinus carpio l., misgurnus fossils l., esox lucius l. and coregonus peled gmel. at different constant temperatures. the stability of the dimensionless characteristics for the duration of each of these periods in the species in question within the limits of optimum temperatures was shown. a co ... | 1974 | 4469609 |
| [action of adrenaine and noradrenaline on the thin heart of the pike esox lucius (l.) and of the carp cyprinus carpio (l.)]. | | 2013 | 5584623 |
| comparative lever analysis and ontogenetic scaling in esocid fishes: functional demands and constraints in feeding biomechanics. | when animals grow, the functional demands that they experience often change as a consequence of their increasing body size. in this study, we examined the feeding biomechanics in esocid species that represent different size classes (small, esox americanus; intermediate, esox niger; large, esox lucius), and how their bite forces and associated functional variables change as they grow. in order to evaluate bite performance through ontogeny, we dissected and measured dimensions of the feeding appar ... | 2016 | 27552975 |
| age-dependent accumulation of (137)cs by pike esox lucius in the yenisei river. | age-dependent accumulation of (137)cs in the muscles and bodies of the pike esox lucius (aged two to seven years) inhabiting a section of the yenisei river polluted with artificial radionuclides has been studied. the content of (137)cs in muscles varied from 0.5 to 7.0 bq/kg of fresh weight. the maximum content of the radionuclide has been found in juveniles. the content of (137)cs in pike muscles and body decreased considerably with age. the high content of (137)cs in the muscles of juveniles i ... | 2016 | 27411826 |
| paternal identity impacts embryonic development for two species of freshwater fish. | paternal, compared to maternal, contributions were believed to have only a limited influence on embryonic development and larval fitness traits in fishes. therefore, the perspective of male influence on early life history traits has come under scrutiny. this study was conducted to determine parental effects on the rate of eyed embryos of ide leuciscus idus and northern pike esox lucius. five sires and five dams from each species were crossed using a quantitative genetic breeding design and the r ... | 2017 | 27401263 |
| historical and contemporary patterns of mercury in a hydroelectric reservoir and downstream fishery: concentration decline in water and fishes. | mercury (hg) contamination can pose risks to human and animal health as well as commercial fisheries. reservoir construction in riverine systems produces flooded conditions amenable to hg(ii)-methylating bacteria, which can transform this relatively benign environmental contaminant into the bioaccumulative, environmentally relevant, and neurotoxic methyl-hg (mehg). hg concentrations ([hg]) in fishes from reservoirs can take decades to decrease to pre-dam levels, but less is known about hg export ... | 2016 | 27272416 |
| high prevalence of trypanosome co-infections in freshwater fishes. | one thousand three hundred seventy three fish specimens of eight different species from the vicinity of kyiv, ukraine, were examined for the presence of trypanosomes and 921 individuals were found to be infected. the prevalence of infection ranged from 24% in freshwater bream, abramis brama (linnaeus), to 100% in spined loach, cobitis 'taenia' linnaeus. the level of parasitaemia also varied significantly between generally mild infections in pikeperch, sander lucioperca (linnaeus), and heavy ones ... | 2014 | 25651690 |
| causes and consequences of intra-specific variation in vertebral number. | intraspecific variation in vertebral number is taxonomically widespread. much scientific attention has been directed towards understanding patterns of variation in vertebral number among individuals and between populations, particularly across large spatial scales and in structured environments. however, the relative role of genes, plasticity, selection, and drift as drivers of individual variation and population differentiation remains unknown for most systems. here, we report on patterns, caus ... | 2016 | 27210072 |
| testing for local adaptation to spawning habitat in sympatric subpopulations of pike by reciprocal translocation of embryos. | we tested for local adaption in early life-history traits by performing a reciprocal translocation experiment with approximately 2,500 embryos of pike (esox lucius) divided in paired split-family batches. the experiment indicated local adaptation in one of the two subpopulations manifested as enhanced hatching success of eggs in the native habitat, both when compared to siblings transferred to a non-native habitat, and when compared to immigrant genotypes from the other subpopulation. gene-by-en ... | 2016 | 27139695 |
| genetic structure of pike (esox lucius) reveals a complex and previously unrecognized colonization history of ireland. | we investigated genetic variation of irish pike populations and their relationship with european outgroups, in order to elucidate the origin of this species to the island, which is largely assumed to have occurred as a human-mediated introduction over the past few hundred years. we aimed thereby to provide new insights into population structure to improve fisheries and biodiversity management in irish freshwaters. | 2014 | 25435649 |
| [cytochemical studies on blood cells of 3 teleost species (carp--cyprinus carpio l., rainbow trout--salmo gairdneri richardson and pike--esox lucius l.)]. | | 1978 | 697717 |
| potential health risks posed by polycyclic aromatic hydrocarbons in muscle tissues of fishes from the athabasca and slave rivers, canada. | polycyclic aromatic hydrocarbons (pahs) are released to the environment from oil sands operations and from natural sources in alberta, canada. concentrations of 16 usepa priority pahs were measured in tissues of fishes collected from three locations on the athabasca river in alberta and two downstream locations on the slave river in the northwest territories, canada. a total of 425 individual fish were collected including 89 goldeye (hiodon alosoides), 93 whitefish (coregonus clupeaformis), 104 ... | 2017 | 26972698 |
| behaviour in a standardized assay, but not metabolic or growth rate, predicts behavioural variation in an adult aquatic top predator esox lucius in the wild. | this study tested for links among behaviour, state and life-history variables as predicted by the pace-of-life hypothesis in adult pike esox lucius. first, a standardized open-field behavioural assay was developed to assess individual behaviour of wild-captured adult e. lucius. behaviour within the standardized assay predicted swimming behaviour in the lake, providing an ecological validation of the assay. there was no relationship between standardized behaviour and any of the life-history and s ... | 2016 | 26947935 |
| climate and physiography predict mercury concentrations in game fish species in quebec lakes better than anthropogenic disturbances. | the fluctuations of mercury levels (hg) in fish consumed by sport fishers in north-eastern america depend upon a plethora of interrelated biological and abiological factors. to identify the dominant factors ultimately controlling fish hg concentrations, we compiled mercury levels (hg) during the 1976-2010 period in 90 large natural lakes in quebec (canada) for two major game species: northern pike (esox lucius) and walleye (sander vitreus). our statistical analysis included 28 geographic informa ... | 2016 | 26825460 |
| correction: potential of environmental dna to evaluate northern pike (esox lucius) eradication efforts: an experimental test and case study. | [this corrects the article doi: 10.1371/journal.pone.0162277.]. | 2017 | 28273174 |
| fitness consequences of early life conditions and maternal size effects in a freshwater top predator. | conditions experienced in early life stages can be an important determinant of individual life histories. in fish, environmental conditions are known to affect early survival and growth, but recent studies have also emphasized maternal effects mediated by size or age. however, the relative sensitivity of the mean fitness (population growth rate λ) to different early life impacts remains largely unexplored. using a female-based integral projection model (ipm) parameterized from unique long-term d ... | 2016 | 26781671 |
| the effect of hatching time on the bioenergetics of northern pike (esox lucius) larvae from a single egg batch during the endogenous feeding period. | size, caloric value and chemical composition were measured separately in the progeny of two northern pike (esox lucius) females at 3-day intervals during the endogenous feeding period from hatching to final yolk resorption. tissue, yolk and entire larvae were analysed separately in three groups of larvae that hatched at different times (between 88 and 106 degree-days post-fertilization). an integrated approach with the gompertz model was used to compute the yolk conversion efficiency and time to ... | 2016 | 26573855 |
| causes and consequences of repeatability, flexibility and individual fine-tuning of migratory timing in pike. | many organisms undertake migrations between foraging and breeding habitats and while it is assumed that reproductive timing affects fitness, little is known about the degree of individual consistency, and about the causes and consequences of individual variation in migratory timing in organisms other than birds. here, we report on a 6-year mark-recapture study, including 2048 individuals, of breeding migration in anadromous pike (esox lucius), an iteroparous top-predatory fish that displays homi ... | 2016 | 26412457 |
| trophic flexibility and opportunism in pike esox lucius. | the first comprehensive investigation of pike esox lucius trophic ecology in a region (ireland) where they have long been thought to be a non-native species is presented. diet was investigated across habitat types (lake, river and canal) through the combined methods of stable-isotope and stomach content analyses. variations in niche size, specialization and the timing of the ontogenetic dietary switch were examined, revealing pronounced opportunism and feeding plasticity in e. lucius, along with ... | 2015 | 26351044 |
| northern pike (esox lucius) collagen: extraction, characterization and potential application. | acid soluble collagen (asc) and pepsin soluble collagen (psc) from the scales of northern pike (esox lucius) were extracted and characterized. it was the first time that this species was used as sources of collagen. ft-ir and amino acid analysis results revealed the presence of collagen. glycine accounts for one-third of its amino acid residues and specific for collagen amino acid - hydroxyproline - is present in isolated protein. the content of imino acid: proline and hydroxyproline in asc and ... | 2015 | 26254247 |
| description of the microsporidian parasite, heterosporis sutherlandae n. sp., infecting fish in the great lakes region, usa. | heterosporosis is an increasingly important microsporidian disease worldwide, impacting wild and farmed raised fishes in both marine and freshwater environments. a previously undescribed species (heterosporis sp.), with widespread distribution in the great lakes region, was the subject of this study. three angler-caught fish were submitted to the minnesota veterinary diagnostic laboratory from 2009-2010 with lesions caused by intracellular proliferation of parasitic spores, resulting in destruct ... | 2015 | 26244983 |
| mitochondrial genome of esox flaviae (southern pike): announcement and comparison with other esocidae. | pikes are fish species belonging to order esociformes, family esocidae, genus esox. species of the genus esox are common, large, and economically important for food and fishing activities. recently, a new species, southern pike e. flaviae, was described for a well-studied area such as italy, using also two mtdna markers: cox1 and cytb. a scant number of remnant populations of the species persist in italy, threatened by habitat loss and degradation and by competition and possible hybridization wi ... | 2016 | 26171871 |
| species-specific mercury bioaccumulation in a diverse fish community. | mercury bioaccumulation models developed for fish provide insight into the sources and transfer of hg within ecosystems. mercury concentrations were assessed for 16 fish species of the western reach of lake diefenbaker, saskatchewan, canada. for top predators (northern pike, esox lucius; walleye, sander vitreum), hg concentrations were positively correlated to δ(15)n, and δ(15)n to fish age, suggesting that throughout life these fish fed on organisms with increasingly higher trophic values and h ... | 2015 | 26113505 |
| evolutionary divergence of adult body size and juvenile growth in sympatric subpopulations of a top predator in aquatic ecosystems. | evolutionary theory predicts that different selective regimes may contribute to divergent evolution of body size and growth rate among populations, but most studies have focused on allopatric populations. here, we studied five sympatric subpopulations of anadromous northern pike (esox lucius) in the baltic sea subjected to allopatric habitats for a short period of their life cycle due to homing behavior. we report differences in adult body size among subpopulations that were in part due to varia ... | 2015 | 26098342 |
| pike esox lucius as an emerging model organism for studies in ecology and evolutionary biology: a review. | the pike esox lucius is a large, long-lived, iteroparous, top- predator fish species with a circumpolar distribution that occupies a broad range of aquatic environments. this study reports on a literature search and demonstrates that the publication rate of e. lucius research increases both in absolute terms and relative to total scientific output, and that the focus of investigation has changed over time from being dominated by studies on physiology and disease to being gradually replaced by st ... | 2015 | 26077107 |
| ecology, evolution, and management strategies of northern pike populations in the baltic sea. | baltic sea populations of the northern pike (esox lucius) have declined since the 1990s, and they face additional challenges due to ongoing climate change. pike in the baltic sea spawn either in coastal bays or in freshwater streams and wetlands. pike recruited in freshwater have been found to make up about 50 % of coastal pike stocks and to show natal homing, thus limiting gene flow among closely located spawning sites. due to natal homing, sub-populations appear to be locally adapted to their ... | 2015 | 26022327 |
| thermal and maternal environments shape the value of early hatching in a natural population of a strongly cannibalistic freshwater fish. | hatching early in the season is often assumed to elevate fitness, particularly in cannibalistic fish in which size-dependent predation mortality is a major selective force. while the importance of the thermal environment for the growth of fish is undisputed, the relevance of maternal effects for offspring growth in the wild is largely unknown. otoliths of 366 age-0 pike (esox lucius l.) were sampled in a natural lake over three seasons. all offspring were assigned to more than 330 potential moth ... | 2015 | 25894093 |
| lake and watershed influences on the distribution of elemental contaminants in the rideau canal system, a unesco world heritage site. | watershed-specific variables such as sediment particle size distribution, water depth, sedimentation rate, focusing factors, and catchment area to lake area ratio can affect the distribution of trace element contaminants to lakes. the aim of this study was to investigate sources of metals to three headwater lakes and to quantify effects of watershed-specific variables on spatial and temporal trends of trace elements (as, cd, co, cr, cu, hg, k, ni, pb, rb, and zn) in sediments and mercury (hg) co ... | 2015 | 25827653 |
| landscape variability explains spatial pattern of population structure of northern pike (esox lucius) in a large fluvial system. | a growing number of studies have been investigating the influence of contemporary environmental factors on population genetic structure, but few have addressed the issue of spatial patterns in the variable intensity of factors influencing the extent of population structure, and particularly so in aquatic ecosystems. in this study, we document the landscape genetics of northern pike (esox lucius), based on the analysis of nearly 3000 individuals from 40 sampling sites using 22 microsatellites alo ... | 2014 | 25614787 |
| temperature dependence of predation depends on the relative performance of predators and prey. | the temperature dependence of predation rates is a key issue for understanding and predicting the responses of ecosystems to climate change. using a simple mechanistic model, we demonstrate that differences in the relative performances of predator and prey can cause strong threshold effects in the temperature dependence of attack rates. empirical data on the attack rate of northern pike (esox lucius) feeding on brown trout (salmo trutta) confirm this result. attack rates fell sharply below a thr ... | 2015 | 25473013 |
| spatio-temporal trends of pcbs in the swedish freshwater environment 1981-2012. | polychlorinated biphenyls (pcbs) have been monitored in perch (perca fluviatilis), pike (esox lucius), and arctic char (salvelinus alpinus) in reference lakes since the late 1960s. temporal trends and spatial patterns are currently monitored in nine and 32 lakes, respectively. overall, pcb concentrations are decreasing. however, this is not consistent for all congeners across all lakes and species. perch has comparatively low pcb concentrations relative to suggested target levels, but individual ... | 2014 | 25403969 |
| the temporal pattern of interphase prolongation and nuclear activities during early embryogenesis in teleostei. | temporal relationship between the beginning of the increase of interphase duration, rna synthesis in the nuclei and morphogenetic function of nuclei have been studied using dimensionless criteria of development duration. experiments were performed in the trout (salmo trutta m.fario andsalmo irideus), the whitefish (coregonus lavaretus), the pike (esox lucius) and the carp (cyprinus caprio). in all these species interphase begins to lengthen approximately at the same developmental stages. the ons ... | 1970 | 28304550 |
| pathogens trigger top-down climate forcing on ecosystem dynamics. | evaluating the effects of climate variation on ecosystems is of paramount importance for our ability to forecast and mitigate the consequences of global change. however, the ways in which complex food webs respond to climate variations remain poorly understood. here, we use long-term time series to investigate the effects of temperature variation on the intraguild-predation (igp) system of windermere (uk), a lake where pike (esox lucius, top predator) feed on small-sized perch (perca fluviatilis ... | 2016 | 26910776 |
| natal departure timing from spatially varying environments is dependent of individual ontogenetic status. | natal departure timing represents one of the first crucial decisions for juveniles born in spatially varying environments that ultimately disappear, but our knowledge on its determinants is limited. the present study aimed at understanding the determinants of juvenile natal departure by releasing individually tagged juvenile pike (esox lucius l.) with variable body size and trophic position in a temporary flooded grassland. specifically, we investigated whether natal departure depends on individ ... | 2013 | 23812603 |
| late pleistocene fishes of the tennessee river basin: an analysis of a late pleistocene freshwater fish fauna from bell cave (site acb-2) in colbert county, alabama, usa. | the tennessee river basin is considered one of the most important regions for freshwater biodiversity anywhere on the globe. the tennessee river basin currently includes populations of at least half of the described contemporary diversity of extant north american freshwater fishes, crayfish, mussel, and gastropod species. however, comparatively little is known about the biodiversity of this basin from the pleistocene epoch, particularly the late pleistocene (∼10,000 to 30,000 years b.p.) leading ... | 2016 | 26855876 |
| microhabitat use in a mediterranean riverine fish assemblage : fishes of the lower matarraña. | over a 22 month period barbus graellsii, chondrostoma toxostoma, cyprinus carpio, esox lucius, gobio gobio, and leuciscus cephalus displayed non-random microhabitat use in the rio mattarraña, spain and generally were overrepresented in deep microhabitats with low or undetectable flow velocities. substrate composition did not strongly affect microhabitat use outside of its covariation with depth and velocity. most seasonal differences in microhabitat use were attributable to seasonal changes in m ... | 1987 | 28311964 |
| testicular tumour in northern pike, esox lucius l. | | 2013 | 23347227 |
| the genome and linkage map of the northern pike (esox lucius): conserved synteny revealed between the salmonid sister group and the neoteleostei. | the northern pike is the most frequently studied member of the esociformes, the closest order to the diverse and economically important salmoniformes. the ancestor of all salmonids purportedly experienced a whole-genome duplication (wgd) event, making salmonid species ideal for studying the early impacts of genome duplication while complicating their use in wider analyses of teleost evolution. studies suggest that the esociformes diverged from the salmonid lineage prior to the wgd, supporting th ... | 2014 | 25069045 |