Ammonia excretion of octopus (Octopus vulgaris) in relation to body weight and protein intake

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• 作者：Benjamí ; n Garcí ; a Garcí ; a ; ^a ; ^{benjamin.garcia@carm.es" rel="nofollow} ; Jes&#xfa ; s Cerezo Valverde^a ; Eva Gó ; mez^a ; Marí ; a Dolores Herná ; ndez^a ; Felipe Aguado-Gimé ; nez^a
• 关键词：Octopus vulgaris ; Ammonia excretion ; Body weight ; Protein intake
• 刊名：Aquaculture
• 出版年：2011
• 出版时间：1 September 2011
• 年：2011
• 卷：319
• 期：1-2
• 页码：162-167
• 全文大小：725 K
• ISSN：S0044848611004972

文摘

The rate of total ammonia excretion (U, mg TAN d^− 1) in relation to body weight (W, 490–3460 g) and absolute protein feeding rate (APFR, 0.00–11.90 g d^− 1) was studied in octopus (Octopus vulgaris). Using multiple regression analysis, the data obtained were fitted to the equation U = 13.91 + 0.07W + 0.02W × APFR, which explained 95% of the variance observed. According to this equation, there was a significant interaction between W and APFR (W × APFR), the coefficient of W varying linearly with APFR (b' = 0.07 + 0.02APFR). When U was expressed as a function of body weight (Ur, mg TAN kg^− 1 body weight d^− 1), Ur basically varied as function of APFR, showing a value of 84 mg TAN kg^− 1 body weight d^− 1 when the octopus was not fed and 265 mg TAN kg^− 1 body weight d^− 1 when protein intake was 9 g d^− 1. U increases linearly with body weight from 10 to 57 g TAN kg^− 1 feed dry matter d^− 1 when APFR is 9 g d^− 1.