| rod opsin cdna sequence from the sand goby (pomatoschistus minutus) compared with those of other vertebrates. | the absorbance spectra of rods from the sand goby were measured by using microspectrophotometry. analysis of the averaged spectra shows that the rod visual pigment has a maximum absorbance (lambda max) at approximately 501 nm. a sand goby retinal cdna library was constructed and then screened with a partial sand goby rod opsin clone obtained by the polymerase chain reaction (pcr). the screening of the library yielded a full length rod opsin clone. the cdna sequence and deduced amino acid sequenc ... | 1992 | 1381834 |
| host-dependent and seasonal variation in opisthaptoral hard parts of gyrodactylus cf. arcuatus from three pomatoschistus spp. and g. arcuatus from gasterosteus aculeatus: a multivariate approach. | gyrodactylus arcuatus-like monogeneans collected from the gills of 3 goby species, pomatoschistus minutus, p. lozanoi and p. pictus, from the voordelta area (sw netherlands) were compared on a morphometric basis with g. arcuatus from its type host, the three-spined stickleback, gasterosteus aculeatus. univariate and multivariate analysis was carried out on measurements of 17 characters of the opisthaptoral hard parts of 268 specimens. the contribution of host-dependent and seasonal factors to th ... | 1999 | 10446702 |
| identification of a host-associated species complex using molecular and morphometric analyses, with the description of gyrodactylus rugiensoides n. sp. (gyrodactylidae, monogenea). | gyrodactylus rugiensis was originally described as a parasite occurring on the marine gobies pomatoschistus minutus and pomatoschistus microps. in our preliminary survey this species was also frequently found on pomatoschistus pictus and pomatoschistus lozanoi. subsequent molecular analysis of the internal transcribed spacers rdna region revealed that this parasite actually represents a complex of two apparently cryptic species, one restricted to p. microps and the other shared by p. minutus, p. ... | 2002 | 12062562 |
| four-year monitoring of parasite communities in gobiid fishes of the south-western baltic. i. guild and component community. | the parasite communities of goby species (teleostei, percomorphi) from the south-western baltic sea were investigated from 1997 to 2000 in three different seasons. in total, 30 parasite species were found in the guild of four goby spp. from dahmeshöved (lübeck bight). the component community of pomatoschistus minutus comprised 22, pomatoschistus pictus 20, gobiusculus flavescens 18 and gobius niger 14 parasite species, whereas pomatoschistus microps from the salzhaff (mecklenburg bight) harboure ... | 2003 | 12827504 |
| four-year monitoring of parasite communities in gobiid fishes of the south-western balticii. infracommunity. | the parasite infracommunity of five goby species (pomatoschistus minutus, p. pictus, p.microps, gobiusculus flavescens, gobius niger) from the south-western baltic was investigated during spring, summer and autumn of the years 1997-2000. the mean parasite species number in single hosts was high, ranging between 1.1 (p. minutus), 2.1 (p. pictus) to even 3.3 (p. microps). gobius niger is the only host which lives longer than a year and is infested by almost identical parasites for longer times, i. ... | 2004 | 15034786 |
| four new species of gyrodactylus von nordmann, 1832 (monogenea, gyrodactylidae) on gobiid fishes: combined dna and morphological analyses. | four gyrodactylus species parasitising four closely related gobiid species in european coastal waters were studied and compared with g. arcuatus bychowsky sensu bychowsky & poljansky (1953) from gasterosteus aculatus . these were g. gondae n. sp. from pomatoschistus minutus and p. lozanoi , g. flavescensis n. sp. from gobiusculus flavescens , g. arcuatoides n. sp. from p. minutus and g. branchialis n. sp. from p. microps. combined molecular and morphological analyses, as well as morphometric and ... | 2004 | 15477751 |
| water turbidity by algal blooms causes mating system breakdown in a shallow-water fish, the sand goby pomatoschistus minutus. | eutrophication as a result of human activity has resulted in increased algal blooms and turbidity in aquatic environments. we investigated experimentally the effect of algal turbidity on the mating system and sexual selection in the sand goby, pomatoschistus minutus (pallas), a marine fish with a resource-defence mating system and paternal care. owing to male-male competition and female choice, large males can monopolize multiple mates, while some males do not achieve mating at all. we show that ... | 2004 | 15556888 |
| prevalence of viral haemorrhagic septicaemia virus in danish marine fishes and its occurrence in new host species. | in order to analyse the occurrence of viral haemorrhagic septicaemia virus (vhsv) in the marine waters around denmark, staff from the danish institute for food and veterinary research participated in 5 research cruises during 1998 to 2002 as a follow-up to 4 research cruises performed in 1996 to 1997. in total, 16,655 fish were examined virologically as 3569 samples. forty fish species and 3 invertebrate species were represented. vhsv was isolated from 133 samples representing 8 species: herring ... | 2005 | 16231640 |
| seasonal variations of selected biomarkers in sand gobies pomatoschistus minutus from the guadalquivir estuary, southwest spain. | sand gobies, pomatoschistus minutus, were collected monthly from september 2002 to august 2003 at a station situated 8 km upstream from the mouth of the guadalquivir estuary (southwest spain). physical parameters of the water and selected biomarkers of organic pollution were recorded in the fish to discuss its potential as a sentinel species in estuaries. the biomarkers selected were the activities of catalase (cat), 7-ethoxyresorufin-o-deethylase (erod), and glutathione s-transferase (gst) in t ... | 2006 | 16328622 |
| visual pigments of baltic sea fishes of marine and limnic origin. | absorbance spectra of rods and some cones were measured by microspectrophotometry in 22 fish species from the brackish-water of the baltic sea, and when applicable, in the same species from the atlantic ocean (3 spp.), the mediterranean sea (1 sp.), or finnish fresh-water lakes (9 spp.). the main purpose was to study whether there were differences suggesting spectral adaptation of rod vision to different photic environments during the short history (<10(4) years) of postglacial isolation of the ... | 2007 | 17822578 |
| hurry-up and hatch: selective filial cannibalism of slower developing eggs. | filial cannibalism (the consumption of one's own offspring) is thought to represent an adaptive strategy in many animals. however, little is known about the details of which offspring are consumed when a parent cannibalizes. here, we examined patterns of within-brood filial cannibalism in the sand goby (pomatoschistus minutus). males spawned sequentially with two females, and we asked whether males cannibalized selectively with regard to egg size or the order in which eggs were received. males p ... | 2008 | 18252661 |
| fluctuating mate preferences in a marine fish. | according to theory, directional female choice for male sexual ornaments is expected to erode underlying genetic variation. considerable attention, in this regard, has been given to understanding the ubiquity of heritable genetic variation in both female choice and male sexual traits. one intriguing possibility emerging from this work is that persistent genetic variation could be maintained, over time, by variation in female mate preferences. here, we report the results of a four-year study show ... | 2010 | 19675000 |
| fish and macro-crustacean communities and their dynamics in the severn estuary. | the species of fish and macro-crustacean living within the severn estuary are reviewed. the fish community is notably species rich and exceeds 100 species in total for the estuary. standardised long-term sampling at hinkley point in bridgwater bay gives a total complement of 83 for a single locality and this number is increasing by about one new species every two years. most of these new species are moving in from centres of population lying to the south of the estuary. almost all species of fis ... | 2010 | 20074757 |
| gyrodactylus salinae n. sp. (platyhelminthes: monogenea) infecting the south european toothcarp aphanius fasciatus (valenciennes) (teleostei, cyprinodontidae) from a hypersaline environment in italy. | historically, non-native species of gambusia (poeciliidae) have been used to control larval stages of the asian tiger mosquito, stegomyia albopicta reinert, harbach et kitching, 2004 throughout italy. the potential utility of indigenous populations of aphanius fasciatus (valenciennes) (teleostei: cyprinodontidae) as an appropriate alternative biological control is currently being explored. a sub-sample of ten fish collected from cervia saline, italy (salinity 65 ppt; 30°c) to assess their reprod ... | 2011 | 21658217 |
| co-phylogeographic study of the flatworm gyrodactylus gondae and its goby host pomatoschistus minutus. | we performed a comparative phylogeographic study on the monogenean flatworm gyrodactylus gondae huyse, malmberg & volckaert 2005 (gyrodactylidae) and its sand goby host pomatoschistus minutus (pallas, 1770) (gobiidae). g. gondae is a host-specific parasite with a direct life cycle and a very short generation time. these properties are expected to increase the chance to track the genealogical history of the host with genetic data of the parasite ('magnifying glass principle'). to investigate this ... | 2017 | 28027967 |
| morphological and morphometric study of crustacean parasites within the genus lernaeocera. | two species of lernaeocera are present in the southeastern north sea. lernaeocera lusci infects bib trisopterus luscus, dragonet callionymus lyra and sand goby pomatoschistus minutas. l. minuta is a junior synonym of l. lusci. the second valid species, l. branchialis, infects whiting merlangius merlangus. the two species can be morphologically separated by the antennary processes, which are present in l. lusci and absent in l. branchialis. discriminant functions allow complete separation between ... | 1995 | 8719951 |
| hypoxia increases the risk of egg predation in a nest-guarding fish. | for fish with parental care, a nest should meet both the oxygenation needs of the eggs and help protect them against predators. while a small nest opening facilitates the latter, it impedes the former and vice versa. we investigated how the presence of potential egg predators in the form of shore crabs carcinus maenas affects nest building, egg fanning, defensive displays and filial cannibalism of egg-guarding male sand gobies pomatoschistus minutus under two levels of dissolved oxygen. in the h ... | 2016 | 27853611 |
| molecular cloning of the common carp (cyprinus carpio) rhodopsin cdna. | a recombinant phage clone containing a 1584 nucleotides rhodopsin cdna was screened from a carp retinal cdna library. the inserted dna consisting of a single open reading frame of 1062 nucleotides at positions 72 to 1133 encodes a 354 amino acid polypeptide. the deduced amino acid sequence of carp rhodopsin showed 95.7, 85.5 and 74.4% identity with that of goldfish, sand goby and lamprey, respectively. the sites of palmitoylation, glycosylation, disulfide bond formation and schiff base formation ... | 1994 | 7842230 |
| morphological and molecular evidence for a new species of the genus dichelyne jägerskiöld, 1902 (ascaridida: cucullanidae) from marine perciform fishes in the south china sea. | a new cucullanid nematode, dichelyne (dichelyne) breviculus n. sp., collected from the intestine of the goatee croaker dendrophysa russelii (cuvier) (perciformes: sciaenidae), the burrowing goby trypauchen vagina (bloch & schneider) and the tropical sand goby acentrogobius caninus (valenciennes) (perciformes: gobiidae) in the south china sea, is described using both light and scanning electron microscopy. the new species differs from its congeners in the size of body (2.16-2.96 mm in male), the ... | 2014 | 25204598 |
| the gyrodactylus (monogenea, gyrodactylidae) parasite fauna of freshwater sand gobies (teleostei, gobioidei) in their centre of endemism, with description of seven new species. | while gobioidei comprises showcases of (adaptive) radiation, the scientific interest they yielded did not ensure full understanding of goby biodiversity. even in a well-studied region like europe, wide knowledge gaps remain. sand gobies represent one of the few clades whose monogenean parasites have been thoroughly studied. however, in the balkans, part of the sand gobies' centre of endemism, these parasites were unstudied. we focus on greek and croatian freshwater gobies. from five sand goby sp ... | 2014 | 24288050 |
| community structure of soft sediment pool fishes in moreton bay, australia. | a survey of soft sediment tide pools was conducted to assess the occupation and assemblage of fishes on three different intertidal shores in moreton bay, australia, between january and december 2009. tide-pool volume ranged from 0· 30 to 29· 75 l and varied significantly between months and sites. a total of 1364 individuals representing 15 species and nine families of fishes were observed. at dunwich, fish assemblages were dominated by the sand goby favonigobius lentiginosus (89%) and whiting, s ... | 2011 | 21284630 |
| four-year monitoring of parasite communities in gobiid fishes of the southwest baltic: iii. parasite species diversity and applicability of monitoring. | the parasite infrapopulations of five goby species (pomatoschistus minutus, p. pictus, p.microps, gobiusculus flavescens and gobius niger) were investigated during spring, summer and autumn of the years 1997-2000. in total, 34 parasite species were found: 17 digenea, 6 nematoda, 5 cestoda, 3 acanthocephala, 2 protozoa, and 1 monogenea. the dominant parasites were the digeneans podocotyle atomon and cryptocotyle concavum, which represent different ecological groups in terms of their modes of tran ... | 2005 | 15609062 |
| colonization and seasonality of goby (gobiidae, teleostei) parasites from the southwestern baltic sea. | a comparative parasitology study of gobiid fishes from two sites on the western baltic sea was done to get information on the quality of the respective environments. the parameters used were the infracommunity, the species numbers and abundance with respect to the size classes of the hosts, and the abundance with respect to the seasons. the hosts, gobius niger, gobiusculus flavescens, pomatoschistus minutus, and p. pictus, were caught at blank eck (kiel bight) and dahmeshöved (lübeck bight) duri ... | 1998 | 9660135 |