Dietary Protein Requirement of Juvenile Fuxian Minnow, Anabarilius grahami. Issue 2 (3rd April 2013)

• Record Type: Journal Article
• Authors: Deng, Junming; Zhang, Xi; Tao, Linli; Rong, Hua; Bi, Baoliang; Kang, Bin
• Is Part Of: Journal of the World Aquaculture Society. Volume 44:Issue 2(2013)
• Page Start: 220
• Page End: 228
• Publication Date: 2013-04-03
• Subjects: Aquaculture -- Periodicals; 639.8
• DOI: 10.1111/jwas.12022
• Languages: English
• ISSNs: 0893-8849

Abstract

<abstract abstract-type="main"> <title>Abstract</title> <p> <bold>A 10‐wk experiment was conducted to determine the optimum dietary protein requirement of juvenile Fuxian minnow, <italic>Anabarilius grahami</italic> (initial average weight 4.14 g). Five isocaloric diets were formulated to contain graded levels of protein (29, 34, 39, 44, and 49%). Each diet was fed to triplicate groups of fish in a recirculating rearing system maintained at 17–21 C. Feed intake of fish fed the 39 and 44% protein diets was significantly higher than that of fish fed the 29, 34, and 49% protein diets (<italic>P</italic> &lt; 0.05). Weight gain and protein gain significantly increased with increasing dietary protein level up to 39% (<italic>P</italic> &lt; 0.05), but no significant differences were observed among fish fed the 39, 44, and 49% protein diets (<italic>P</italic> &gt; 0.05). In contrast, feed conversion ratio decreased with increasing dietary protein level up to 39%. Protein retention efficiency or protein efficiency ratio generally increased with increasing dietary protein level up to 39%, and then the value gradually decreased thereafter. Broken‐line regression analysis showed that the optimum dietary protein requirement for maximum weight gain of juvenile <italic>A. grahami</italic> under the experimental conditions was 38.6% (equivalent to ca. 33.0% estimated digestible protein).</bold> </p> </abstract>