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| Clausing, Rachel J.; Losen, Barbara; Oberhaensli, Francois R.; Darius, H. Taiana; Sibat, Manoella; Hess, Philipp; Swarzenski, Peter W.; Chinain, Mireille; Bottein, Marie-yasmine Dechraoui. |
| Ciguatoxins (CTXs) are potent algal toxins that cause widespread ciguatera poisoning and are found ubiquitously in coral reef food webs. Here we developed an environmentally-relevant, experimental model of CTX trophic transfer involving dietary exposure of herbivorous fish to the CTX-producing microalgae Gambierdiscus polynesiensis. Juvenile Naso brevirostris were fed a gel-food embedded with microalgae for 16 weeks (89 cells g.1 fish daily, 0.4 ¦Ìg CTX3C equiv kg.1 fish). CTXs in muscle tissue were detectable after 2 weeks at levels above the threshold for human intoxication (1.2 ¡À 0.2 ¦Ìg CTX3C equiv kg.1). Although tissue CTX concentrations stabilized after 8 weeks (¡«3 ¡À 0.5 ¦Ìg CTX3C equiv kg.1), muscle toxin burden (total ¦Ìg CTX in muscle tissue)... |
| Tipo: Text |
Palavras-chave: Ciguatoxin; Bioaccumulation; Growth dilution; Trophic transfer; Herbivorous fish; Experimental model. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00442/55339/60476.pdf |
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| Hardison, D. Ransom; Holland, William C.; Mccall, Jennifer R.; Bourdelais, Andrea J.; Baden, Daniel G.; Darius, H. Taiana; Chinain, Mireille; Tester, Patricia A.; Shea, Damian; Quintana, Harold A. Flores; Morris, James A., Jr.; Litaker, R. Wayne. |
| Ciguatera fish poisoning is an illness suffered by > 50,000 people yearly after consumption of fish containing ciguatoxins (CTXs). One of the current methodologies to detect ciguatoxins in fish is a radiolabeled receptor binding assay (RBA((R))). However, the license requirements and regulations pertaining to radioisotope utilization can limit the applicability of the RBA((R)) in certain labs. A fluorescence based receptor binding assay (RBA((F))) was developed to provide an alternative method of screening fish samples for CTXs in facilities not certified to use radioisotopes. The new assay is based on competition binding between CTXs and fluorescently labeled brevetoxin-2 (BODIPY (R)-PbTx-2) for voltage-gated sodium channel receptors at site 5 instead... |
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| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00664/77575/79555.pdf |
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| Hardison, D. Ransom; Holland, William C.; Darius, H. Taiana; Chinain, Mireille; Tester, Patricia A.; Shea, Damian; Bogdanoff, Alex K.; Morris, James A., Jr.; Quintana, Harold A. Flores; Loeffler, Christopher R.; Buddo, Dayne; Litaker, R. Wayne. |
| Lionfish, native to reef ecosystems of the tropical and sub-tropical Indo-Pacific, were introduced to Florida waters in the 1980s, and have spread rapidly throughout the northwestern Atlantic, Caribbean Sea and the Gulf of Mexico. These invasive, carnivorous fish significantly reduce other fish and benthic invertebrate biomass, fish recruitment, and species richness in reef ecosystems. Fisheries resource managers have proposed the establishment of a commercial fishery to reduce lionfish populations and mitigate adverse effects on reef communities. The potential for a commercial fishery for lionfish is the primary reason to identify locations where lionfish accumulate sufficient amounts of ciguatoxin (CTX) to cause ciguatera fish poisoning (CFP), the... |
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| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00660/77221/78672.pdf |
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