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The use of parasites as biological tags for stock identification of Blue Jack Mackerel, Trachurus picturatus, in the North-eastern Atlantic
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Orientador(es)
Resumo(s)
The use of parasites as biological tags for discriminating stocks of blue jack mackerel, Trachurus pic turatus (Osteichthyes, Carangidae), in the northeast Atlantic Ocean is assessed herein. In this study the
following parasites have been selected as possible biological tags: Anisakis spp. (Nematoda: Anisakidae),
Rhadinorhynchus sp. (Acanthocephala: Rhadinorhynchidae), Nybelinia sp. (Cestoda: Tentaculariidae) and
Bolbosoma sp. (Acanthocephala: Polymorphidae). Anisakis spp. was the most prevalent parasite taxon
found in all localities, attaining higher values in fish from Peniche, mainland Portugal. The occurrence of
Rhadinorhynchus sp. in fish from all studied areas was rare (prevalence <10%) but significantly different
between localities, with higher values in both archipelagos. Nybelinia sp. specimens were only detected
in fish from Madeira and cystacanths ofthe genus Bolbosoma were never detected. The distinctive pattern
of infection of these parasite species points to the existence of three stocks of blue jack mackerel in the
northeast Atlantic: one in Portuguese mainland waters, one in Madeira archipelago and another in the
Canary archipelago. These results support the management strategy which treats the three populations
studied as separate stocks.
Descrição
Palavras-chave
Blue Jack Mackerel Trachurus picturatus Parasites Biological tags Stock identification Northeast Atlantic . Faculdade de Ciências da Vida
Contexto Educativo
Citação
Vasconcelos, J., Hermida, M., Saraiva, A., González, J. A., & Gordo, L. S. (2017). The use of parasites as biological tags for stock identification of blue jack mackerel, Trachurus picturatus, in the North-eastern Atlantic. Fisheries Research, 193, 1-6.
Editora
Elsevier