Acanthocephalan infection of inshore fish in two fjords at South Georgia
| Autor: | Krzysztof Zdzitowiecki, Martin G. White |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
0106 biological sciences
Shetland 0303 health sciences education.field_of_study biology Polymorphida Ecology Population Species diversity Geology Oceanography biology.organism_classification 010603 evolutionary biology 01 natural sciences 030308 mycology & parasitology Notothenia rossii 03 medical and health sciences medicine.anatomical_structure Abundance (ecology) medicine 14. Life underwater Fur seal education Body cavity Ecology Evolution Behavior and Systematics |
| Zdroj: | Antarctic Science. 4:197-203 |
| ISSN: | 1365-2079 0954-1020 |
| DOI: | 10.1017/s0954102092000300 |
| Popis: | An examination of 111 fish of eight species, including 92 immature Notothenia rossii Richardson revealed nine acanthocephalan species, including four Echinorhynchida occurring in the alimentary tract and five Polymorphida in the body cavity. Echinorhynchida were much more numerous (87% specimens of 4855 collected), especially Metacanthocephalus johnstoni Zdzitowiecki (the dominant species) and Aspersentis megarhynchus (Linstow). The Polymorphida parasites of seals (three species) were more abundant than species parasitic in birds (two species). Association of most of species, (except Corynosoma bullosum (Linstow) and Echinorhynchus spp.), with the inshore (fjord) environment was confirmed. The species diversity, prevalence and density of infection increased with the size of immature N. rossii. Differences in acanthocephalan occurrence and changes with time are related to differences in host distribution and abundance. For example, the occurrence of C. arctocephali in N. rossii at South Georgia is related to the increase of the fur seal population. A list of acanthocephalans in fish at South Georgia and the South Shetland Islands (14 species in total) is included. |
| Databáze: | OpenAIRE |
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