Crescimento de larvas de cascudo-preto (Rhinelepis aspera) Spix & Agassiz, 1829 (OSteichthyies: Siluriformes, Loricariidae) submetidas a diferentes níveis alimentares

• Ano de defesa: 2005
• Autor(a) principal: López, Cristiane Machado de [UNESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Peixe; Peixe - Alimentação; Peixe - Larva; Cascudo (Peixe); Crescimento; Fishes Food
• Link de acesso: http://hdl.handle.net/11449/144112; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/12-09-2016/000542240.pdf

The objective of the work was to study the initial feeding of Rhinelepis aspera aiming at the development of techniques for its intensive culture. An experiment designed to evaluate the effect of feeding rates on larval growth was carried in completely randomized design, consisting of the following five levels, with three replicates each: 0% (T00 - starvation), 10% (Tl0), 20% (T20), 50% (T50) and 90% (T90). The feeding rates were calculated based on the average dry weight of larval fish in each treatment. During the first 15 days (phase 1) the larvae received Antenia nauplii and in the following 13 days (Phase II) commercial diet. Every three days fish were measured in order to adjust the feeding rates. The growth rates were calculated as G coefficient (g per day) and specific growth rate TCE (% body weight/d). The condition factor and feed conversion of cascudo-¬preto larvae were also analyzed in the different treatments. The growth parameters were compared by Univariate Analysis and Helmert's Constrast was employed to evaluate each temporal treatment series. Starved larvae died after- 5-7 days. The best G growth values were observed in larvae submitted to the highest feeding rates (T90 and T50). In the last biometric evaluation, were verified increasing values of the specific growth rate (TCE) in all the treatments, coinciding with the weaning to the artificial diet.