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Internal helminth fauna of Baltic herring, Clupea harengus membras L. [Clupeiformes] from Southern Baltic

100%

Szostakowska B., Sulgostowska T.

Acta Ichthyologica et Piscatoria

2001

tom 31

nr 1

In the years 1994-1996, a total of 592 specimens of herring Clupea harengus membras L., caught in southern Baltic, were examined. The investigations revealed four species of trematodes: Hemiurus lühei, H. raabei, H. levinseni, Brachyphallus crenatus, two species of nematodes: Hysterothylacium auctum (syn. H. aduncum), and Anisakis simplex and three acanthocephalans: Echinorhynchus gadi, Metechinorhynchus salmonis and Pomphorhynchus sp. The finding of H. levinseni constitutes the first record of this species in Polish waters. The infection parameters of herring (prevalence, intensity and abundance) were compared in relation to different capture areas and seasons of the year. Possible affects of the feeding ground, fish body length and the spawning group of herring on the infection levels were also examined. No relation was observed between the place and the season of catch and the infection level of herring. The fish representing different feeding grounds (Baltic, Danish Straits) and sequential length classes showed variable parameters of infection.

Helminth parasites of twaite shad, Alosa fallax (Actinopterygii: Clupeiformes: Clupeidae), from the Southern Baltic Sea

80%

Rokicki J., Rolbiecki L., Skora A.

Acta Ichthyologica et Piscatoria

2009

tom 39

nr 1

Background. The twaite shad, Alosa fallax (Lacepčde, 1803), is a migratory marine species which lives in North Atlantic and sporadically appears in the Baltic Sea. Parasites of the twaite shad are poorly known, especially those infecting the fish occurring in the Baltic. Materials and Methods. Within 2003–2005, 100 individuals of A. fallax, caught in the southern Baltic, were examined for the presence of parasites following commonly used procedures. Results. The parasites found represented Digenea: Diplostomum spp. and Nematoda: Contracaecum osculatum (Rudolphi, 1802), Hysterothylacium aduncum aduncum (Rudolphi, 1802), and Desmidocercella numidia (Seurat, 1920). The overall prevalence was 74.0%, while mean intensity averaged 10.5. The most frequent parasites were Diplostomum spp. (62.0%, 10.5) and C. osculatum (39.0%, 2.2). This study constitutes the first rekord of Diplostomum spp., C. osculatum, and D. numidica in twaite shad. Conclusion. The parasite fauna of the twaite shad from the southern Baltic Sea is poorly diversified, but the intensity and prevalence of infections are relatively high.

Ograniczanie wyników

2 Acta Ichthyologica et Piscatoria

1 Rokicki J.

1 Rolbiecki L.

1 Skora A.

1 Sulgostowska T.

1 Szostakowska B.

1 2009

1 2001

Wyniki wyszukiwania

Internal helminth fauna of Baltic herring, Clupea harengus membras L. [Clupeiformes] from Southern Baltic

Helminth parasites of twaite shad, Alosa fallax (Actinopterygii: Clupeiformes: Clupeidae), from the Southern Baltic Sea