Mixing models and stable isotopes as tools for research on feeding aquatic organisms

摘要: EnglishImplementation of mixture models in isotopic analysis has been increasing due to the need analyze sources and understand their variations relation consumers, which requires an accurate determination discriminant rate fractioning. In this context, we presented main concepts related application stable isotopes mixing models, with aim benefits problems these tools surveys on nutrition aquatic organisms. The predominant methods identified included IsoSource, MixSIR, SIBER SIAR, use C N research Studies both freshwater marine environments were evaluated determine relative contribution food items trophic relationships between It can be concluded that isotope technique, is a promising tool for feeding organisms understanding issues ecology Key words: food; nutrition; diets; fish. portuguesOs modelos de mistura nas analises isotopicas vem sendo cada vez mais utilizados devido necessidade analisar as fontes alimentares e compreender suas variacoes em relacao aos consumidores, o que requer uma adequada determinacao taxas discriminantes fracionamentos. Neste contexto, objetivamos apresentar os principais conceitos relacionados aplicacao isotopos estaveis mistura, visando vantagens desvantagens destas ferramentas pesquisas com nutricao organsimos aquaticos. Foram identificados forma predominante dos utilizacao organismos aquaticos, tanto ambientes dulcicolas como marinhos para determinar contribuicao relativa itens relacoes troficas entre organismos. Pode-se concluir que, tecnica compoe ferramenta promissora sobre alimentacao aquaticos na compreensao questoes relacionadas ecologia trofica destes Palavras-chave: alimento; nutricao; dietas; peixe