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Effects of short-term exposure to paralytic shellfish toxins on clearance rates and toxin uptake in five species of New Zealand bivalve ArchiMer
Contreras, Andrea; Marsden, Islay D.; Munro, Murray H. G..
Algal blooms produced by toxic dinoflagellates have increased worldwide, resulting in economic losses to aquaculture and fisheries. Bivalve species differ in their ability to feed on toxin-producing dinoflagellates and this could result in differences in toxin accumulation among species. In New Zealand, the effects of paralytic shellfish poisoning (PSP) toxins on the physiology of bivalve molluscs are relatively unknown. We hypothesised that the feeding responses of five New Zealand bivalve species exposed to PSP-toxic dinoflagellates would be species-specific, affecting their accumulation of toxins. Each species was exposed to toxic and non-toxic species of Alexandrium spp. and clearance rate used as an index of sensitivity to PSP toxins. Clearance rates...
Tipo: Text Palavras-chave: Biotransformation; Decarbamoylation; Dosinia anus; Epimerisation; Ostrea chilensis; Paphies donacina; Pecten novaezelandiae; Perna canaliculus.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00069/18007/16007.pdf
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Bonamia exitiosus n. sp (Haplosporidia) infecting flat oysters Ostrea chilensis in New Zealand ArchiMer
Hine, P; Cochennec, Nathalie; Berthe, Franck.
Bonamia sp. is a pathogenic parasite that occurs in the haemocytes of dredge oysters Ostrea chilensis Philippi in New Zealand, Ultrastructurally it resembles other haplosporidians in the possession of haplosporosomes, haplosporogenesis, persistence of mitotic microtubules during interphase and of the nuclear envelope during mitosis, and occurrence of a diplokaryotic or multi-nucleate plasmodial stage. Another stage containing a large vacuole derived from enlargement of 1 or more mitochondria has not previously been described from other haplosporidians. It most closely resembles B, ostreae Pichot et al., 1979, which parasitises and is pathogenic in haemocytes of European flat oysters, O. edulis. However, B. ostreae is smaller and denser, and has fewer...
Tipo: Text Palavras-chave: New Zealand; 18S rDNA; Ultrastructure; Ostrea chilensis; Bonamia exitiosus.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/2001/publication-818.pdf
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