...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>North American Journal of Aquaculture >Discriminating Rainbow Trout sources using freshwater and marine otolith growth chemistry.
【24h】

Discriminating Rainbow Trout sources using freshwater and marine otolith growth chemistry.

机译：使用淡水和海洋耳石生长化学方法区分虹鳟的来源。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Rainbow Trout Oncorhynchus mykiss are nonindigenous to Newfoundland. Subsequent to the development of marine cage rearing of Rainbow Trout in the Atlantic provinces in the early 1970s, Rainbow Trout have been captured in 33 rivers on the west and south coast of Newfoundland. These escapees may have negative impacts on wild populations, particularly Atlantic Salmon Salmo salar and Brook Trout Salvelinus fontinalis. In this study, the chemical fingerprints in the freshwater and marine growth sections of otoliths were used to distinguish three groups of Rainbow Trout of known origins: two hatcheries and one wild population. The results were then used to assign fish of unknown origin to the three known-origin groups and thus estimate the proportion of escapees. The three known sources produced distinct chemical fingerprints in the freshwater growth of the otoliths (cross validation test, average accuracy of over 93%); whereas, the marine growth in the otoliths produced a single chemical fingerprint for the two hatchery-origin groups distinct from the wild population. Results indicated that at least 60% of the unknown-origin fish were aquaculture escapees. Vaterite was encountered in 70-80% of the known hatchery-origin fish, 0% in the wild population, and 50% in the escapees. It appears that escapees with vaterite had a lower survival rate. The presence-absence of vaterite did not appear to be useful in distinguishing escapees from a wild population.Digital Object Identifier http://dx.doi.org/10.1080/15222055.2012.711275
机译：虹鳟Onkihynchus mykiss不是纽芬兰本土的。 1970年代初，大西洋省虹鳟鳟鱼养殖网箱的发展之后，虹鳟鱼已被捕获在纽芬兰西海岸和南海岸的33条河流中。这些逃逸者可能对野生种群产生负面影响，特别是大西洋鲑，鲑鳟和布鲁克鳟鱼。在这项研究中，耳石的淡水和海洋生长区域的化学指纹被用来区分三类已知来源的虹鳟：两个孵化场和一个野生种群。然后将结果用于将未知来源的鱼分配给三个已知来源的组，从而估算逃逸者的比例。这三种已知来源在耳石的淡水生长中产生了独特的化学指纹（交叉验证测试，平均准确度超过93％）;耳石的海洋生长产生了两个与野生种群不同的孵化场群体的单一化学指纹。结果表明，至少有60％的来历不明的鱼类是水产养殖逃逸者。已知孵化器起源的鱼类中有70-80％遇到了球石，野生种群中有0％，逃逸者中有50％。看来使用v石的逃逸者的存活率较低。缺少球ate石似乎对区分野外逃犯没有帮助。数字对象标识符http://dx.doi.org/10.1080/15222055.2012.711275

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

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