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Henry-Silva,Gustavo Gonzaga; Camargo,Antonio Fernando Monteiro; Pezzato,Luiz Edivaldo. |
Objetivou-se com este estudo determinar os coeficientes de digestibilidade aparente (CDA) da proteína bruta e dos aminoácidos de duas espécies de macrófitas aquáticas flutuantes (Eichhornia crassipes e Pistia stratiotes) pela tilápia-do-nilo (Oreochromis niloticus) e verificar a qualidade da água dos aquários de digestibilidade em relação às concentrações de nitrogênio e fósforo. Foram elaboradas três rações, marcadas com 0,10% de óxido de cromo-III, sendo uma ração-referência (purificada) e as demais contendo 30% de cada uma das macrófitas aquáticas. As tilápias-do-nilo (58,8 + 18,5 g) foram alimentadas até a saciedade aparente e a coleta de fezes foi feita pelo sistema Guelph modificado. Os CDA médios da proteína e dos aminoácidos foram, respectivamente,... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aminoácidos; Eichhornia crassipes; Eutrofização artificial ingredientes; Nutrientes; Pistia stratiotes. |
Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982006000300003 |
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Moraes,Cyntia Rafaela Ferreira de; Henry-Silva,Gustavo Gonzaga. |
ABSTRACT: Implementation of mixture models in isotopic analysis has been increasing due to the need to analyze sources and understand their variations in relation to consumers, which requires an accurate determination of their discriminant rate and fractioning. In this context, we presented the main concepts related to the application of stable isotopes and mixing models, with the aim to analyze the benefits and problems of these tools in surveys on nutrition of aquatic organisms. The predominant methods identified included application of the models IsoSource, MixSIR, SIBER and SIAR, with the use of C and N isotopes in research with aquatic organisms. Studies in both freshwater and marine environments were evaluated to determine the relative contribution... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Food; Nutrition; Diets; Fish.. |
Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000700650 |
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Bessa Junior,Ambrosio Paula; Azevedo,Celicina Maria da Silveira Borges; Pontes,Frederico Silva Thé; Henry-Silva,Gustavo Gonzaga. |
This study aimed to evaluate the productivity, growth performance and economic feasibility of polyculture of Nile tilapia Oreochromis niloticus and shrimp Litopenaeus vannamei at different stocking densities. Feed was provided based on fish requirements. The experiment was conducted at the Aquaculture facility of the Universidade Federal Rural do Semi-Árido - UFERSA, in a completely randomized design with five treatments and four replicates each. Treatments consisted of a tilapia monoculture with 2 tilapias.m-2; and polyculture with 2 tilapias.m-2 and L. vannamei at four different densities (3, 6, 9 and 12 shrimps.m-2). The initial individual biomass for fish and shrimp were 1.23±0.12 g and 0.133±0.009 g, respectively. Water quality parameters,... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquaculture; Economic return; Growth performance; Sustainability. |
Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000700002 |
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