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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
13/07/1995 |
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Data da última atualização: |
05/04/2017 |
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Autoria: |
HAMILTON, S. J.; MEHRLE, P. M. |
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Título: |
Metallothionein in fish: review of its importance in assessing stress from metal contaminants. |
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Ano de publicação: |
1986 |
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Fonte/Imprenta: |
Transaction American Fisheries Society, v.115, p.596-609, 1986. |
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Idioma: |
Inglês |
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Conteúdo: |
Metallothionein, a low-molecular-weight protein whose apoprotein, thionein, is induced by exposure to cadmium, copper, mercury and zinc, plays an important role in the transport and storage of heavy metals; it also provides a protective role against the toxic effects of these metals by sequestering and thus reducing the amount of the free metal ions. Interest in the detoxification role of metallothionein in fisheries research and aquatic toxicology has increased because of the increasing contamination of aquatic habitats by heavy metals. Reports of laboratory and field investigations have shown that metallothionein synthesis is induced in fishes during chronic and acute exposures to metals. There is also evidence of the presence in fish of low-molecular-weight inorganic-binding proteins that are different from metallothionein, as well as evidence that cadmium is not sequestered by metallothien in rainbow trout Salmo gairdneri. The sequestering of metal contaminats by metallothionien and sunsequent toxic effects in fish and other animals has been described be the spillover hypothesis, which states that once metallothionein is saturated by metals, excess ions spill over into other cellular compartments and cause pathological lesions. We review the literature on metallothionen in fish, and emphasize the protein role in the detoxification and binding of metal contaminants. |
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Palavras-Chave: |
Contamination; Toxic. |
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Thesagro: |
Contaminação; Metal; Peixe; Tóxico. |
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Thesaurus Nal: |
fish. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01976naa a2200217 a 4500
001 1784816
005 2017-04-05
008 1986 bl --- 0-- u #d
100 1 $aHAMILTON, S. J.
245 $aMetallothionein in fish$breview of its importance in assessing stress from metal contaminants.
260 $c1986
520 $aMetallothionein, a low-molecular-weight protein whose apoprotein, thionein, is induced by exposure to cadmium, copper, mercury and zinc, plays an important role in the transport and storage of heavy metals; it also provides a protective role against the toxic effects of these metals by sequestering and thus reducing the amount of the free metal ions. Interest in the detoxification role of metallothionein in fisheries research and aquatic toxicology has increased because of the increasing contamination of aquatic habitats by heavy metals. Reports of laboratory and field investigations have shown that metallothionein synthesis is induced in fishes during chronic and acute exposures to metals. There is also evidence of the presence in fish of low-molecular-weight inorganic-binding proteins that are different from metallothionein, as well as evidence that cadmium is not sequestered by metallothien in rainbow trout Salmo gairdneri. The sequestering of metal contaminats by metallothionien and sunsequent toxic effects in fish and other animals has been described be the spillover hypothesis, which states that once metallothionein is saturated by metals, excess ions spill over into other cellular compartments and cause pathological lesions. We review the literature on metallothionen in fish, and emphasize the protein role in the detoxification and binding of metal contaminants.
650 $afish
650 $aContaminação
650 $aMetal
650 $aPeixe
650 $aTóxico
653 $aContamination
653 $aToxic
700 1 $aMEHRLE, P. M.
773 $tTransaction American Fisheries Society$gv.115, p.596-609, 1986.
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Registro original: |
Embrapa Pantanal (CPAP) |
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Origem |
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Cutter |
Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Amapá. |
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Data corrente: |
04/07/2018 |
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Data da última atualização: |
19/07/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 4 |
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Autoria: |
SANTOS, G. G.; OLIVEIRA, M. S. B.; NEVES, L. R.; TAVARES-DIAS, M. |
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Afiliação: |
GRACIENHE GOMES SANTOS, FAMA; MARCOS SIDNEY BRITO OLIVEIRA, PPGBIO, UNIFAP; LIGIA RIGÔR NEVES, PPGBIONORTE, UNIFAP; MARCOS TAVARES-DIAS, CPAF-AP. |
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Título: |
Parasites community of Astronotus crassipinnis (Cichlidae), a fish from the Brazilian Amazon. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Annals of Parasitology, v. 64, n. 2, p. 121-128, 2018. |
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DOI: |
10.17420/ap6402.143 |
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Idioma: |
Inglês |
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Conteúdo: |
We provide the first study on the diversity and community of parasites in Astronotus crassipinnis from the lower Amazon River, in Brazil. Of 35 hosts examined, 100% were infected with one or more species of parasites, such as Gussevia asota, Gussevia astronoti, Gussevia rogersi, Posthodiplostomum sp., Contracaecum sp., Gorytocephalus sp. and Dolops longicauda. Gussevia asota, G. astronoti and G. rogersi were dominant, and, in total, 9788 parasites were collected. The richness of parasite species (4.9±0.7), Brillouin diversity (0.46±0.28) and evenness (0.29±0.17) were low. Parasites had aggregated dispersion, parasitism did not affect the host condition factor, and host size did not influence abundance, species richness and parasite diversity. The parasitic fauna was characterized by the presence of few species of parasites with high prevalence and low abundance, specifically the endoparasites, besides dominance of ectoparasites. The presence of endoparasites indicates that the diet of A. crassipinnis consists mostly of mollusks and microcrustaceans. This fish species is an intermediate host for Posthodiplostomum sp., Contracaecum sp. and Gorytocephalus sp., parasites found in larval stage. Finally, the behavior and availability of infective stages, which are intermediate hosts for endoparasites, were factors structuring the communities of endoparasites. |
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Palavras-Chave: |
Astronotus crassipinnis. |
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Thesagro: |
Parasito de Animal. |
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Thesaurus NAL: |
Cichlidae; Parasites. |
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Categoria do assunto: |
S Ciências Biológicas |
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URL: |
https://www.alice.cnptia.embrapa.br/alice/bitstream/doc/1093028/1/CPAFAP2018ParasitescommunityofAstronotuscrassipinnis.pdf
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Marc: |
LEADER 02037naa a2200217 a 4500
001 2093028
005 2018-07-19
008 2018 bl uuuu u00u1 u #d
024 7 $a10.17420/ap6402.143$2DOI
100 1 $aSANTOS, G. G.
245 $aParasites community of Astronotus crassipinnis (Cichlidae), a fish from the Brazilian Amazon.$h[electronic resource]
260 $c2018
520 $aWe provide the first study on the diversity and community of parasites in Astronotus crassipinnis from the lower Amazon River, in Brazil. Of 35 hosts examined, 100% were infected with one or more species of parasites, such as Gussevia asota, Gussevia astronoti, Gussevia rogersi, Posthodiplostomum sp., Contracaecum sp., Gorytocephalus sp. and Dolops longicauda. Gussevia asota, G. astronoti and G. rogersi were dominant, and, in total, 9788 parasites were collected. The richness of parasite species (4.9±0.7), Brillouin diversity (0.46±0.28) and evenness (0.29±0.17) were low. Parasites had aggregated dispersion, parasitism did not affect the host condition factor, and host size did not influence abundance, species richness and parasite diversity. The parasitic fauna was characterized by the presence of few species of parasites with high prevalence and low abundance, specifically the endoparasites, besides dominance of ectoparasites. The presence of endoparasites indicates that the diet of A. crassipinnis consists mostly of mollusks and microcrustaceans. This fish species is an intermediate host for Posthodiplostomum sp., Contracaecum sp. and Gorytocephalus sp., parasites found in larval stage. Finally, the behavior and availability of infective stages, which are intermediate hosts for endoparasites, were factors structuring the communities of endoparasites.
650 $aCichlidae
650 $aParasites
650 $aParasito de Animal
653 $aAstronotus crassipinnis
700 1 $aOLIVEIRA, M. S. B.
700 1 $aNEVES, L. R.
700 1 $aTAVARES-DIAS, M.
773 $tAnnals of Parasitology$gv. 64, n. 2, p. 121-128, 2018.
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Registro original: |
Embrapa Amapá (CPAF-AP) |
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