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Effect of dietary protein and lipid levels on gonadal development of female redclaw crayfish C herax quadricarinatus
Author(s) -
RodríguezGonzález Hervey,
HernándezLlamas Alfredo,
GarcíaUlloa Manuel,
Villarreal Humberto
Publication year - 2013
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.2012.03206.x
Subject(s) - cherax quadricarinatus , hepatopancreas , crayfish , biology , development of the gonads , gonadosomatic index , gonad , vitellogenesis , zoology , reproduction , decapoda , endocrinology , medicine , oocyte , crustacean , fishery , biochemistry , fecundity , ecology , population , embryo , demography , sociology
The effect of two crude dietary protein (26% and 32% P) and two lipid levels (4.7% and 12% L) on gonadal development of female redclaw crayfish C herax quadricarinatus was determined. The gonadosomatic index ( GSI ), hepatosomatic index ( HSI ), biochemical composition of gonad and hepatopancreas, oocyte diameter and frequency of the developmental stage of oocytes were analysed. The GSI was significantly less using 26% P to 4.7% L. A significant interaction between P and L content was found for GSI . A significantly higher HSI value was obtained when L was 12%. P content in the hepatopancreas was significantly higher using 32% P and 4.7% L. The maximum L content in the hepatopancreas was obtained from the 32% P and 12% L diet. A significant interaction between P and L content was found for L content in the hepatopancreas. A higher frequency of post‐vitellogenic oocytes was obtained with diets containing 32% P. There was an interaction between dietary P and L level causing lipid accumulation in the hepatopancreas and changes in GSI . For an optimum 32% P, excess dietary lipid is bioaccumulated in the hepatopancreas, indicating that there is excess available energy. When the P and L levels are restricted, there is a limited gonad development, thus affecting overall reproduction in female C . quadricarinatus .