| treatment of fish parasites. 4. effects of sym. triazinone (toltrazuril) on monogenea. | for chemotherapy in fish parasitized by monogeneans, toltrazuril was tested in vivo and in vitro against gill-parasitizing species (dactylogyrus vastator, d. extensus, d. cornu, pseudodactylogyrus anguillae, diplozoon paradoxum, dip. homoion) as well as the skin-parasitizing species gyrodactylus arcuatus. naturally infected fish were incubated at 20 degrees c for 0.3, 1, 2, 3, 4, and 6h in water containing 0.5, 10, 20, 30, and 50 microgram toltrazuril/ml. in general, the damage observed resulted ... | 1988 | 3237675 |
| treatment of fish parasites. 10. effects of a new triazine derivative, hoe 092 v, on monogenea: a light and transmission electron microscopy study. | for chemotherapy of fish parasitized by monogeneans, a novel triazine derivative, 2-[3,5-alpha-dichloro-4-(4-methyl-sulfonylphenoxy)-phenyl]-1-methy l- hexahydro-1,2,4-triazine-3,5-dion (hoe 092 v), was tested in vivo against the gill- and skin-parasitizing species dactylogyrus extensus, d. vastator, and gyrodactylus arcuatus. naturally infected fish were incubated in aerated, separate tanks at 22 degrees c for 1, 2, 3, and 4 h in water containing 0, 1, 5, 10, or 15 micrograms hoe 092 v/ml, wher ... | 1993 | 8278338 |
| 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 |
| the nuclear rdna region of gyrodactylus arcuatus and g. branchicus (monogenea: gyrodactylidae). | the primary structure of the ribosomal dna internal transcribed spacers (its-1 and its-2) and 5.8s rrna gene were used to characterize and identify 2 monogenean species of gyrodacrylus living externally on the threespine stickleback (gasterosteus aculeatus). the its region was amplified by pcr from freshwater, brackish, and marine isolates of gyrodactylus arcuatus and g. branchicus, and the ends of the coding regions were identified by comparative alignment. no intraspecific and very low intersp ... | 2000 | 11191921 |
| speciation and host-parasite relationships in the parasite genus gyrodactylus (monogenea, platyhelminthes) infecting gobies of the genus pomatoschistus (gobiidae, teleostei). | using species-level phylogenies, the speciation mode of gyrodactylus species infecting a single host genus was evaluated. eighteen gyrodactylus species were collected from gobies of the genus pomatoschistus and sympatric fish species across the distribution range of the hosts. the v4 region of the ssrrna and the internal transcribed spacers encompassing the 5.8s rrna gene were sequenced; by including published sequences a total of 30 species representing all subgenera were used in the data analy ... | 2003 | 14636683 |
| parasites of sticklebacks (actinopterygii: gasterosteidae) from south-eastern baltic sea (poland). | a total of 142 individuals of gasterosteus aculeatus l. and 22 individuals of pungitius pungitius (l.) from several areas of the coastal waters of the gdańsk bay both brackish- and freshwater were examined for parasites. the survey was carried out within 1988-1991. six parasite species, namely: gyrodactylus arcuatus, apatemon gracilis, sphaerostomum bramae, phyllodistomumfolium, neoechinorhynchus rutili, and argulus foliaceus were recovered from sticklebacks caught in freshwater habitats; while ... | 2005 | 16838625 |
| seasonal variation of parasite infection of three-spined stickleback (gasterosteus aculeatus l.) in the southern baltic. | seasonal changes of infection were observed in the case of some species of ectoparasites: trichodina domerguei domerguei, t. tenuidens, gyrodactylus arcuatus, and thersitina gasterostei, as well as for endoparasites: glugea anomala, schistocephalus solidus, diphyllobothrium ditremum, and proteocephalus filicollis. same seasonal changes in frequency of developmental stages were observed in the case of females t. gasterostei. the highest level of infection with ectoparasites was observed in spring ... | 2002 | 16894719 |
| occurrence of gyrodactylids on wild atlantic salmon, salmo salar l., in danish rivers. | three hundred and one parr of wild salmon, salmo salar l., from three river systems in denmark were examined in december 2005 and august 2006 for gyrodactylid infections. the species determination was done by morphological analyses of the opisthaptoral hard parts and molecular analyses of the internal transcribed spacer (its) region using pcr restriction fragment length polymorphism (rflp) and sequencing. five species of the genus gyrodactylus were found: gyrodactylus derjavini, gyrodactylus teu ... | 2008 | 18234020 |
| gyrodactylus orecchiae sp. n. (monogenea: gyrodactylidae) from farmed populations of gilthead seabream (sparus aurata) in the adriatic sea. | gyrodactylus orecchiae sp. n. (monogenea, gyrodactylidae) is described from the skin, fins, eyes and gills of juvenile sparus aurata l. (gilthead seabream) following two outbreaks of gyrodactylosis amongst stocks held in inshore floating cages on the adriatic coast of albania and croatia. fish were heavily infected (1000+ gyrodactylids/fish) with g. orecchiae which reportedly resulted in approximately 2-10% mortality amongst the infected stock. morphologically, the haptoral hooks of g. orecchiae ... | 2009 | 19391328 |
| parasite communities of two three-spined stickleback populations in subarctic norway--effects of a small spatial-scale host introduction. | co-introduction and colonization of parasites with the introduction of new host species into aquatic habitats may depend on the host specificity and dispersal capabilities of the parasites. we compared the metazoan parasite community of an introduced three-spined stickleback (gasterosteus aculeatus) population with that of the nearby source population in subarctic norway. as expected from a small spatial scale (5 km), the parasite component communities in the two lakes were highly similar. all i ... | 2015 | 25630694 |
| displaced phylogeographic signals from gyrodactylus arcuatus, a parasite of the three-spined stickleback gasterosteus aculeatus, suggest freshwater glacial refugia in europe. | we examined the global mitochondrial phylogeography of gyrodactylus arcuatus, a flatworm ectoparasite of three-spined stickleback gasterosteus aculeatus. in accordance with the suggested high divergence rate of 13%/million years, the genetic variation of the parasite was high: haplotype diversity h=0.985 and nucleotide diversity π=0.0161. the differentiation among the parasite populations was substantial (φst=0.759), with two main allopatric clades (here termed euro and north) accounting for 54% ... | 2016 | 27155331 |