• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Taylor Francis Open Select >Observations on Side-Swimming Rainbow Trout in Water Recirculation Aquaculture Systems
【2h】

Observations on Side-Swimming Rainbow Trout in Water Recirculation Aquaculture Systems

机译：循环水养殖系统中侧游虹鳟的观察

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

During a controlled 6-month study using six replicated water recirculation aquaculture systems (WRASs), it was observed that Rainbow Trout Oncorhynchus mykiss in all WRASs exhibited a higher-than-normal prevalence of side swimming (i.e., controlled, forward swimming but with misaligned orientation such that the fish's sagittal axis is approximately parallel to the horizontal plane). To further our understanding of this abnormality, a substudy was conducted wherein side swimmers and normally swimming fish were selectively sampled from each WRAS and growth performance (length, weight), processing attributes (fillet yield, visceral index, ventrum [i.e., thickness of the ventral “belly flap”] index), blood gas and chemistry parameters, and swim bladder morphology and positioning were compared. Side swimmers were found to be significantly smaller in length and weight and had less fillet yield but higher ventrum indices. Whole-blood analyses demonstrated that, among other things, side swimmers had significantly lower whole-blood pH and higher Pco 2. Side swimmers typically exhibited swim bladder malformations, although the positive predictive value of this subjective assessment was only 73%. Overall, this study found several anatomical and physiological differences between side-swimming and normally swimming Rainbow Trout. Given the reduced weight and fillet yield of market-age side swimmers, producers would benefit from additional research to reduce side-swimming prevalence in their fish stocks.Received March 20, 2014; accepted May 20, 2014
机译：在使用六个重复水循环水产养殖系统（WRAS）进行的为期6个月的对照研究中，观察到所有WRAS中的虹鳟Oncorhynchus mykiss的侧向游泳发生率均高于正常水平（即，受控，向前游泳但未对齐）方向，以使鱼的矢状轴大致平行于水平面）。为了进一步了解这种异常，进行了一项子研究，其中从每个WRAS中有选择地取样了边游泳者和正常游泳的鱼，以及生长性能（长度，体重），加工属性（鱼片产量，内脏指数，腹膜[即，比较腹侧“腹部皮瓣”]指数，血气和化学参数，以及游泳膀胱的形态和位置。发现边游泳者的身长和体重明显更小，并且鱼片产量更低，但腹膜指数更高。全血分析表明，除其他因素外，边游泳者的全血pH值显着降低，Pco 2较高。边游泳者通常表现出游泳膀胱畸形，尽管该主观评估的阳性预测价值仅为73％。总的来说，这项研究发现了侧泳和正常游泳的虹鳟之间的一些解剖学和生理学差异。鉴于适龄边游泳者的体重和鱼片产量减少，生产者将从其他研究中受益，以减少其鱼类资源中的边游泳率。2014年3月20日； 2014年5月20日接受

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号