Department of Biology, North Carolina State University, Campus Box 7617, Raleigh, NC 27695, USA.
J Fish Biol. 2012 Jul;81(1):135-47. doi: 10.1111/j.1095-8649.2012.03318.x. Epub 2012 May 22.
The carbon (δ(13) C) and nitrogen (δ(15) N) values of Sander vitreus scales differed pre and post-introduction in treatment lakes among years following the introduction of Micropterus dolomieu. No difference of δ(13) C and δ(15) N in S. vitreus scales was found in control lakes where M. dolomieu were not introduced. In treatment lakes, S. vitreus δ(15) N increased and δ(13) C decreased. No relationship was found between S. vitreus and M. dolomieu abundance in the two treatment lakes. Size structure of S. vitreus and M. dolomieu was negatively correlated and condition of the two species was positively correlated. Although S. vitreus feeding habits may have changed in the treatment lakes after M. dolomieu introductions, evidence suggests that fitness-related factors (i.e. abundance and condition) of S. vitreus remained unchanged, indicating S. vitreus and M. dolomieu may coexist where M. dolomieu have been introduced.
引进斑点叉尾鮰后，多年来在引入斑点叉尾鮰的处理湖中，鳜鱼（Sander vitreus）鳞片的碳（δ(13) C）和氮（δ(15) N）值在引入前后发生了变化。在没有引入斑点叉尾鮰的对照湖中，鳜鱼鳞片的 δ(13) C 和 δ(15) N 没有差异。在处理湖中，鳜鱼的 δ(15) N 增加，δ(13) C 减少。在两个处理湖中，没有发现鳜鱼和斑点叉尾鮰丰度之间的关系。鳜鱼和斑点叉尾鮰的大小结构呈负相关，两种鱼的状况呈正相关。尽管在引入斑点叉尾鮰后，处理湖中鳜鱼的摄食习性可能发生了变化，但有证据表明，鳜鱼的与适应度相关的因素（即丰度和状况）保持不变，这表明在引入斑点叉尾鮰的地方，鳜鱼和斑点叉尾鮰可能共存。
