| long-term dynamics of ligula intestinalis and roach rutilus rutilus: a study of three epizootic cycles over thirty-one years. | data are presented on 2 full epizootic cycles and the start of a third of ligula intestinalis in roach rutilus rutilus in a small lake, and the relationships of these cycles to the densities of rudd, scardinius erythrophthalmus, and great crested grebes, podiceps cristatus, over 31 years. the parasite was introduced to the lake by p. cristatus in 1973 at a time when the roach population had increased in response to eutrophication to a level at which individual fish growth was stunted and the hit ... | 2001 | 11578089 |
| ddt homologues and pcbs in eggs of great crested grebe (podiceps cristatus) and mallard (anas platyrhynchos) from lake maggiore (italy). | ddt homologues and pcbs were determined in eggs of two stationary species, great crested grebe (podiceps cristatus) and mallard (anas platyrhynchos), in three breeding areas of lake maggiore in 1998. as expected, much higher contamination levels of both ddts and pcbs were found in the fish-eating great crested grebe than in the mallard. in many eggs these values exceeded the safety thresholds proposed for aquatic bird protection. however, no significant correlation could be found between the two ... | 2002 | 12481873 |
| [study on the trematode parasites of the birds in korea] | authors carried out an investigation of the helminthic parasites of the wild birds in korea. most wild birds were collected from kyoung sang do, kyoung kee do and seoul area from september 1970 to march 1973. a total of 70 wild birds, 19 species were examined, which comprised as follows; 10 anas platyrhynchus, 10 anas fulicata, 4 anas poeciolorhyncha zonorhyncha, 8 anser albifrone albifrone, 5 anser cygonopsis cygnoid, 10 aythya fuligula, 6 gallicrex cinerea, 2 porgana fusca, 2 phisianum calichi ... | 1973 | 12913486 |
| brominated flame retardants and organochlorine pollutants in aquatic and terrestrial predatory birds of belgium: levels, patterns, tissue distribution and condition factors. | liver and muscle samples from 7 species of aquatic and terrestrial predatory birds from flanders (belgium) were analysed for polychlorinated biphenyls (pcbs), polybrominated diphenylethers (pbdes) and organochlorine pesticides (ocps). pcbs were the predominant compounds in our samples, which showed highest concentrations in the liver of barn owl (tyto alba) and sparrowhawk (accipiter nisus) (up to 1000 microg/g lipid weight). pbdes could be determined in most samples at lower concentrations than ... | 2006 | 16005130 |
| [molecular genetic analysis of the biological properties of highly pathogenic influenza a/h5n1 virus strains isolated from wild birds and poultry during epizooty in western siberia (july 2005)]. | the full-size genomes of 2 highly pathogenetic avian influenza (hpai) virus strains isolated from a wild great-crested grebe (a/grebe/novosibirsk/29/05) and a domestic duck (a/duck/novosibirsk/56/05) in the tract of the chany hollow, barabino forest-steppe (novosibirsk region) during the epizootic outbreak in the summer of 2005. the reproductive properties of these strains successively increase in the series of cell lines bhk-2 --> leh --> vero-e6 --> mdck --> ps. a/grebe/novosibirsk/29/05 and a ... | 2006 | 16756172 |
| [isolation of highly pathogenic avian influenza (hpai) a/5h5n1 strains from wild birds in the epizootic outbreak on the ubsu-nur lake (june 2006) and their incorporation to the russian federation state collection of viruses (july 3, 2006)]. | virological and molecular genetic studies of the field material collected in the epicenter of epizooty with high mortality rates among the wild birds on the coast of the ubsu-nur lake (republic of tyva, 51 degrees nl, 93 degrees el, june 2006) revealed the etiological role of highly pathogenic avian influenza (hpai) h5n1. seven hpai/h5n1 strains were isolated from the tracheal/cloacal swabs of clinically healthy, ill and recently dead great-crested grebes (podiceps cristatus), cormorants (phalac ... | 2006 | 17214076 |
| risk assessment applied to spain's prevention strategy against highly pathogenic avian influenza virus h5n1. | notifiable avian influenza (nai) had never been reported in spain, until july 2006 when a dead great crested grebe (podiceps cristatus) was found positive to the highly pathogenic h5n1 subtype as part of the active wild bird surveillance plan. the current program of the spanish ministry of agriculture, fisheries, and food (mapa)'s strategic preventive plan against nai is divided in the following parts: identification of risk areas and risk wild bird species, increased biosecurity measures, early ... | 2007 | 17494621 |
| pcb levels and accumulation patterns in waterbird eggs and in their prey at lake kerkini, a north-eastern mediterranean wetland of international importance. | seven "target" pcb levels were determined and compared in waterbird eggs, in their prey, and in water at lake kerkini, northern greece, to investigate pcb bioaccumulation patterns and to define the best bioindicator of target pcbs for this area. pcbs were analysed from eggs of phalacrocorax carbo, podiceps cristatus, ardea cinerea, egretta garzetta, and nycticorax nycticorax and from prey types alburnus alburnus, rutilus rutilus, lepomis gibbosus. carassius auratus, and rana sp. pcbs analysed we ... | 2007 | 17549546 |
| spermiogenesis and spermatozoon of the tapeworm ligula intestinalis (diphyllobothriidea): phylogenetic implications. | using transmission electron microscopy, spermiogenesis and the spermatozoon ultrastructural organization are described in ligula intestinalis (linnaeus, 1758) (diphyllobothriidea), a parasite of the great crested grebe podiceps cristatus (linnaeus, 1758). spermiogenesis starts with the differentiation zone of 2 striated rootlets, 2 centrioles giving rise to 2 flagella, and an intercentriolar body. the latter is composed of 5 electron-dense layers separating 4 electron-lucent layers. in the early ... | 2009 | 18576887 |
| avian influenza in wild waterfowl and shorebirds in the donana national park: serological survey using the enzyme-linked immunosorbent assay. | the indirect elisa was used to detect antibodies to influenzavirus a in the sera of wildfowl from the donana national park. of the 712 birds examined, 44 (6.2%) were seropositive. positive birds belonged to 10 of the 13 species studied. infection rates varied widely: spoonbill (platalea leucorodia, 32.2%), mallard (anas platyrhynchos, 9.9%), gadwall (anas strepera, 8.6%), red-crested pochard (netta rufina, 8.1%), pochard (aythya ferina, 6.4%), shoveler (anas clypeata, 5%), great crested grebe (p ... | 1994 | 18671098 |
| [the first break-through of the genotype 2.3.2 of high-virulence influenza a virus a/hsn1, which is new for russia, in the far east]. | the epizootic etiologically associated with highly pathogenic avian influenza h5n1 genotype 2.3.2 that is new for russia among wild and domestic birds in the south of the primorye territory during spring migration in april 2008 has been decoded. about 25% of the wild birds of a water complex, which include european teals (anas crecca), mallard ducks (anas platyrhynchos), great-crested grebes (podiceps cristatus), are involved in viral circulation in the area of the suifun-khankai plain. chicken ... | 2008 | 19069785 |
| first case of highly pathogenic h5n1 avian influenza virus in spain. | the h5n1 strain of avian influenza virus has been involved in severe mortality in domestic poultry, and has also been found in different species of wildlife in europe. the basque country avian influenza surveillance program began sample collection and processing the fall of 2005. | 2008 | 19077185 |
| habitat selection by breeding waterbirds at ponds with size-structured fish populations. | fish may significantly affect habitat use by birds, either as their prey or as competitors. fish communities are often distinctly size-structured, but the consequences for waterbird assemblages remain poorly understood. we examined the effects of size structure of common carp (cyprinus carpio) cohorts together with other biotic and abiotic pond characteristics on the distribution of breeding waterbirds in a seminatural system of monocultured ponds, where three fish age classes were separately st ... | 2010 | 20532472 |
| further studies on contracaecum spasskii mozgovoi, 1950 and c. rudolphii hartwich, 1964 (sensu lato) (ascaridida: anisakidae) from piscivorous birds in china. | contracaecum spasskii mozgovoi, 1950, collected from the great crested grebe podiceps cristatus (linnaeus) (podicipediformes: podicipedidae), is redescribed using both light and, for the first time, scanning electron microscopy. contracaecum spasskii differs from its congeners by having marked transverse cuticular annulations, the length of the oesophagus and spicules, the ratio between the intestinal caecum and the ventricular appendix, the number and arrangement of male caudal papillae, and es ... | 2013 | 23404759 |
| first detection and genotyping of human-associated microsporidia in wild waterfowl of slovakia. | a total of 47 avian faecal samples of wild waterfowl (great cormorant - phalacrocorax carbo, great crested grebe - podiceps cristatus, white stork - ciconia ciconia) trapped in the eastern slovakia were screened for the presence of human pathogenic microsporidia by microscopy and real-time sybr green pcr method using species primers and sequenced. microscopic analysis showed presence in 32 samples (29 cormorants, 3 dippers). microsporidial dna (encephalitozoon cuniculi genotype i) was identified ... | 2013 | 23377906 |
| highly (h5n1) and low (h7n2) pathogenic avian influenza virus infection in falcons via nasochoanal route and ingestion of experimentally infected prey. | an experimental infection with highly pathogenic avian influenza (hpai) and low pathogenic avian influenza (lpai) viruses was carried out on falcons in order to examine the effects of these viruses in terms of pathogenesis, viral distribution in tissues and viral shedding. the distribution pattern of influenza virus receptors was also assessed. captive-reared gyr-saker (falco rusticolus x falco cherrug) hybrid falcons were challenged with a hpai h5n1 virus (a/great crested grebe/basque country/0 ... | 2012 | 22427819 |
| host specificity and seasonality of helminth component communities in central european grebes (podicipediformes) and loons (gaviiformes). | structure and pattern of helminth component communities parasitizing grebes and loons are poorly understood. here we analyze the prevalence, intensity and diversity of helminths in 505 czech grebes (podiceps cristatus, podiceps nigricollis, tachybaptus ruficollis) and loons (gavia arctica, gavia stellata) collected between 1962 and 2014. the species richness of helminth component communities ranged from 31±8 (p. cristatus) to 50±4 (g. stellata) species, with helminth load similar in all five hos ... | 2015 | 26008120 |
| sex determination in 58 bird species and evaluation of chd gene as a universal molecular marker in bird sexing. | the aim of this research was to test the chd gene (chromo helicase dna-binding gene) as a universal molecular marker for sexing birds of relatively distant species. the chd gene corresponds to the aim because of its high degree of conservation and different lengths in z and w chromosomes due to different intron sizes. dna was isolated from feathers and the amplification of the chd gene was performed with the following sets of polymerase chain reaction (pcr) primers: 2550f/2718r and p2/p8. sex de ... | 2015 | 22553188 |
| three echinostome species from wild birds in the republic of korea. | three echinostome species, i.e., patagifer bilobus, petasiger neocomense, and saakotrema metatestis, are newly recorded in the trematode fauna of the republic of korea. they were recovered from 3 species of migratory birds (platalea minor, podiceps cristatus, and egretta garzetta), which were donated by the wildlife center of chungbuk (wcc) and the conservation genome resource bank for korean wildlife (cgrb). only 1 p. bilobus specimen was recovered from the intestine of a black-faced spoonbill ... | 2014 | 25352700 |
| [description of a new cestode species mircia shigini gen. et sp. n. (cyclophyliidea: schistotaeniidae)]. | a new genus and species of cestodes from the great-crested grebe podiceps cristatus collected in the eastern europe is described. the genus mircia gen. n. in addition to the type species m. shigini gen. n. includes the following species formerly being included in the genus joyeuxilepis spassky, 1947: m. decacantha (fuhrmann, 1913) comb. n., m. decacanthoides (borgarenko et gulyaev, 1991) comb. n., m. fimbriata (borgarenko, spasskaja et spassky, 1972), comb. n., and m. uralensis (gulyaev, 1989) c ... | 2007 | 16579031 |
| evidence for the co-existence of separate strains or species of ligula in lough neagh, northern ireland. | ligula (cestoda: pseudophyllidea) infections in gudgeon (gobio gobio) and roach (rutilus rutilus) differ markedly in the pathology that is observed in the host, particularly with respect to a tissue response and the extent of inhibition of gonadal development. the entire internal transcribed spacer (its) region (its-1, 5.8s and its-2) and the large subunit domains d1-d3 were sequenced and compared in parasites from these fish from lough neagh, northern ireland, together with a single specimen fr ... | 2002 | 12015830 |
| liver and breast feather mercury in piscivorous birds of the caspian sea: monitoring changes. | mercury in the liver and breast feathers of the common cormorant, and in three species of grebes from the southern coast of the caspian sea, were determined. the common cormorant had significantly more mercury in its tissues (liver: 8.5 ± 1.5; feather 8 ± 1 mg/kg dry weight) than grebes (great crested grebe: 3 ± 0.5, 8 ± 1.5; black-necked grebe: 3 ± 0.5, 5.5 ± 1; little grebe 2.5 ± 0.5, 4 ± 0.5). unlike common cormorants, grebes had less mercury in the liver than in breast feathers. mercury in t ... | 2011 | 21442207 |
| total mercury and mercury species in birds and fish in an aquatic ecosystem in the czech republic. | total mercury and mercury species (methylmercury-mehg, inorganic mercury--hg(2+)) were determined in the aquatic ecosystem záhlinice (czech republic). four tissues (muscle, intestines, liver and kidney) of three bird species--cormorant, great crested grebe and eurasian buzzard, muscle tissues of common carp, grass carp, northern pike, goldfish, common tench, perch and rudd, aquatic plants (reed mace and common reed), sediments and water were analysed. relative contents of mehg (of total hg) were ... | 2007 | 16720064 |
| in retrospect: the courtship habits of the great crested grebe. | | 2014 | 25254461 |
| evolution of displays within the pair bond. | although sexual selection is an important cause of display evolution, in socially monogamous species (e.g. many birds), displays continue after formation of the pair bond. here, we consider that these displays evolve because they stimulate the partner to increase investment in offspring. our study is motivated by elaborate mutual displays in species that are largely monomorphic and have long-term pair bonds (e.g. the great crested grebe, podiceps cristatus) and by many empirical results evidenci ... | 2013 | 23427172 |
| organochlorine contamination in the great crested grebe (podiceps cristatus): effects on eggshell thickness and egg steroid levels. | eggs of the great crested grebe (podiceps cristatus) were collected from a breeding area on lake maggiore (northern italy) from 2001 to 2005 in the vicinity of a p,p'-ddt manufacturer, whose production was stopped in 1996. ddt homologue and pcb congener levels were determined and compared to levels in eggs collected from other breeding areas on lake maggiore and in a presumably less contaminated area on lake garda. although lake garda eggs on average possessed a lower level of p,p'-dde than lake ... | 2008 | 18644614 |
| taxonomic revision of joyeuxilepis spassky, 1947 (cestoda: amabiliidae): redescriptions of j. biuncinata (joyeux & baer, 1943), j. decacantha (fuhrmann, 1913) and j. pilatus borgarenko & gulyaev, 1991. | two species of joyeuxilepis spassky, 1947 are redescribed from tachybaptus ruficollis in bulgaria: j. biuncinata (joyeux & baer, 1943) and j. pilatus borgarenko & gulyaev, 1991. the syntypes of j. decacantha (fuhrmann, 1913) from podiceps cristatus in sweden and voucher specimens of j. pilatus (identified as 'tatria decacantha') from t. ruficollis in england (new geographical record) from the british museum (natural history) collection are also re-described. the voucher specimens and cysticercoi ... | 2003 | 12975619 |
| lift-based paddling in diving grebe. | to examine the hydrodynamic propulsion mechanism of a diving great crested grebe (podiceps cristatus), the three-dimensional kinematics was determined by digital analysis of sequential video images of dorsal and lateral views. during the acceleration phase of this foot-propelled bird, the feet move through an arc in a plane nearly normal to the bird's line of motion through the water, i.e. the toes move dorsally and medially but not caudally relative to the water. the kinematics of the grebe's l ... | 2001 | 11316488 |
| cestode communities in non-breeding populations of four grebe species (aves: podicipedidae) from the bulgarian black sea coast. | cestode communities in podiceps cristatus, p. grisegena, p. nigricollis and tachybaptus ruficollis during their migrations and overwintering are studied at the bulgarian black sea coast. the infracommunities exhibit high richness, abundance and dominance, and low diversity and similarity. the component communities have a similar taxonomic structure at the levels higher than species, a small number of core species and a high portion of grebe specialists in the richness and abundance. the comparis ... | 1999 | 10511974 |
| competitive food exploitation of smelt osmerus eperlanus by great crested grebes podiceps cristatus and perch perca fluviatilis at lake ijsselmeer, the netherlands. | the impact of predation by an avian predator (great crested grebe podiceps cristatus) and a predatory fish (perch perca fluviatilis) on a common resource, the small planktivorous fish smelt (osmerus eperlanus) was studied in lake ijsselmeer, the netherlands, in july-october 1985-1988. at this time of the year the grebes are in simultaneous wing-moult and therefore temporarily flightless. four factors limit the predation pressure by grebes: (1) an underwater visibility threshold of c. 40 cm secch ... | 1993 | 28313813 |
| long-term trends in organochlorine and mercury residues in some predatory birds in britain. | residue levels of organochlorine pesticides (heod, dde), polychlorinated biphenyls (pcbs) and mercury (hg) in the livers of five predatory bird species were monitored in britain over a 28-year (1963-1990) period. of two raptor species, sparrowhawks contained higher levels of most chemicals than did kestrels. among three fish-eaters, herons and kingfishers contained the highest levels of dde and heod, while herons and great-crested grebes contained the highest levels of pcbs and mercury. species ... | 1993 | 15091899 |
| foraging rhythm of great crested grebes podiceps cristatus adjusted to diel variations in the vertical distribution of their prey osmerus eperlanus in a shallow eutrophic lake in the netherlands. | great crested grebes podiceps cristatus only foraged for an hour or two during dawn and again during dusk on lake ijsselmeer in august-september. during this time of the year the adult birds are in wing moult and temporarily unable to fly. the food of grebes consisted almost exclusively of smelt osmerus eperlanus, the most numberous pelagic fish. simultaneous sonar registrations and trawl net fishing showed that smelt moved to the water surface during the twilight periods. during day and night t ... | 1988 | 28312396 |
| [residual chlorinated pesticides and polychlorinated biphenyls in the eggs and adipose tissue of wild birds]. | in 1983 and 1984, in the state veterinary institute at jihlava, 129 samples of eggs of wild birds of 14 species were analyzed coming from different regions of the czech socialist republic for the presence of residues of chlorinated pesticides and polychlorinated biphenyls (pcb). apart from this, nine samples of hawk fat and 27 samples of buzzard fat were examined. the method of gas chromatography with a detector of electron capture was used for the analysis. the analyzed samples were found to co ... | 1986 | 3090767 |
| [occurrence of nematode decorataria decorata (cram, 1927) skrjabin, soboler et ivashkin, 1965 in podiceps ruficollis (pall. 1764) and podiceps cristatus (l. 1758) in poland]. | | 1980 | 7314626 |
| the great crested grebe and the idea of secondary sexual characters. | | 1912 | 17732755 |
| multiple introductions of reassorted highly pathogenic avian influenza viruses (h5n8) clade 2.3.4.4b causing outbreaks in wild birds and poultry in egypt. | recently, an increased incidence of outbreaks of highly pathogenic avian influenza (hpai) h5n8 in poultry linked to infected migratory birds has been reported from different european, asian and african countries. in egypt, incursion of hpai h5n8 virus of clade 2.3.4.4b has been recently registered. full genomic characterization of 3 virus isolates from wild birds and poultry (backyard and commercial farm sectors) showed high nucleotide similarity among the ha, na, m, and ns gene segments of the ... | 2018 | 29248796 |
| spatio-temporal variation in nesting success of colonial waterbirds under the impact of a non-native invasive predator. | colonial breeding in birds provides protection from predators and may be particularly important when birds have to cope with an invasive predator. the probability of nest predation in a colony can vary depending on several factors, such as the nest's location in the colony and the level of aggregation of nests. we studied the nesting success of colonial great crested grebes and monitored the occurrence of the non-native invasive american mink in the colony. from among 92 grebe nests, 54.3% were ... | 2018 | 30317388 |
| waterbird counts on large water bodies: comparing ground and aerial methods during different ice conditions. | the aerial and ground methods of counting birds in a coastal area during different ice conditions were compared. ice coverage of water was an important factor affecting the results of the two methods. when the water was ice-free, more birds were counted from the ground, whereas during ice conditions, higher numbers were obtained from the air. the first group of waterbirds with the smallest difference between the two methods (average 6%) contained seven species: mute swan cygnus olor, whooper swa ... | 2018 | 30038859 |
| highly pathogenic and low pathogenic avian influenza h5 subtype viruses in wild birds in ukraine. | there have been three waves of highly pathogenic avian influenza (hpai) outbreaks in commercial, backyard poultry, and wild birds in ukraine. the first (2005-2006) and second (2008) waves were caused by h5n1 hpai virus, with 45 outbreaks among commercial poultry (chickens) and backyard fowl (chickens, ducks, and geese) in four regions of ukraine (ar crimea, kherson, odesa, and sumy oblast). h5n1 hpai viruses were isolated from dead wild birds: cormorants (phalacrocorax carbo) and great crested g ... | 2019 | 31713401 |
| highly pathogenic and low pathogenic avian influenza h5 subtype viruses in wild birds in ukraine. | there have been three waves of highly pathogenic avian influenza (hpai) outbreaks in commercial, backyard poultry, and wild birds in ukraine. the first (2005-2006) and second (2008) waves were caused by h5n1 hpai virus, with 45 outbreaks among commercial poultry (chickens) and backyard fowl (chickens, ducks, and geese) in four regions of ukraine (ar crimea, kherson, odesa, and sumy oblast). h5n1 hpai viruses were isolated from dead wild birds: cormorants (phalacrocorax carbo) and great crested g ... | 2019 | 31131580 |
| estimation of native and alkylated polycyclic aromatic hydrocarbons (pahs) in seabirds from the south coast of the baltic sea. | native and alkylated polycyclic aromatic hydrocarbons (pahs) were examined in the muscle, liver, kidneys, and lungs of greater scaup (aythya marila) and great crested grebe (podiceps cristatus). both species showed differences in distribution and profiles among the tissues. the highest ʃpah concentrations were in the scaup lungs and the grebe kidneys (20 and 19 ng g-1 wet weight, respectively). alkylated derivatives were in the range of 61 to 77% of σpahs in both species. differences in pah prof ... | 2020 | 32940838 |
| description of tylodelphys darbyi n. sp. (trematoda: diplostomidae) from the threatened australasian crested grebe (podiceps cristatus australis, gould 1844) and linking of its life-cycle stages. | species of the genus tylodelphys (diplostomidae) have a cosmopolitan distribution. metacercariae of these species infect the eye, brain, pericardial sac or body cavity of fish second intermediate hosts, and the adults are found in piscivorous birds of many orders. an unnamed species of tylodelphys from the eyes of bullies (gobiomorphus cotidianus) was characterized molecularly and morphologically as a metacercaria in a previous study, in which it was predicted that the adult of this species woul ... | 2019 | 30789114 |