Zoogeography of fish parasites of the pearlside (Maurolicus muelleri), with genetic evidence of Anisakis simplex (s.s.) from the Mid-Atlantic Ridge |
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Authors: | Sven Klimpel Esra Kellermanns Harry W Palm František Moravec |
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Institution: | 1. Institute of Zoomorphology, Cell Biology and Parasitology, Heinrich-Heine-University Düsseldorf, Universit?tsstrasse 1, 40225, Düsseldorf, Germany 2. Institute of Parasitology, Academy of Science of the Czech Republic, Brani?ovská 31, 37005, Ceske Budejovice, Czech Republic
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Abstract: | A total of 200 Maurolicus muelleri from the Mid-Atlantic Ridge (MAR) and the Norwegian Deep (ND) were studied for parasitic helminths. Two different metazoans
were isolated from the MAR and five species from the ND. The predominant parasite species in both areas were tetraphyllidean
cestode larvae (Scolex pleuronectis) and the anisakid nematode Anisakis simplex sensu stricto (s.s.), the latter being identified using genetic analysis of the internal transcribed spacer (ITS-1, ITS-2) and 5.8S regions of
the rDNA. The parasite fauna of M. muelleri from the MAR was less species rich in comparison to ND, due to the deep-sea and oceanic environment. The digeneans Brachyphallus crenatus and Lecithaster confusus as well as the raphidascarid fish nematode Hysterothylacium aduncum were only collected from the ND. This can be explained either by the deep origin of the sampled fish specimens or the lack
of suitable intermediate or final hosts in the region. Based on the frequent occurrence of A. simplex (s.s.) around the MAR and the ND, a pelagic life cycle is suggested at both localities, involving baleen and toothed whales as
final and pelagic and mesopelagic fish and invertebrates as intermediate or paratenic hosts. |
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