The relationships between protein intake and protein accretion, synthesis, and retention efficiency for individual grass carp, Ctenopharyngodon idella (Valenciennes)

Author:

Carter C. G.,Houlihan D. F.,Brechin J.,McCarthy I. D.

Abstract

The aim of this study was to investigate the influences of diet, ration, and individual variation on protein-nitrogen flux in the grass carp, Ctenopharyngodon idella (Valenciennes). Grass carp were fed either lettuce or a pelleted diet or were starved. Fish fed lettuce had lower rates of protein accretion than those fed the pelleted diet and some lost body protein. Rates of whole-animal protein synthesis were ranked as follows: pellet-fed fish > lettuce-fed fish > starved fish. Productive protein value was negatively correlated with rate of protein degradation and positively correlated with the efficiency of retention of synthesized protein. Rates of protein synthesis were not correlated with productive protein value and these data suggest that ultimately it is the rate at which proteins are degraded that determines efficiency of growth. Comparison of pairs offish eating the same diet and amounts of food but having different growth rates demonstrated that the faster growing fish had lower rates of protein degradation, higher retention of synthesized protein, higher RNA activity, a lower capacity for synthesis, and variable rates of protein synthesis.

Publisher

Canadian Science Publishing

Subject

Animal Science and Zoology,Ecology, Evolution, Behavior and Systematics

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3