Predation by Captive Wild Brook Trout on Calcein-Marked versus Nonmarked Atlantic Salmon Fry
Predation by Captive Wild Brook Trout on Calcein-Marked versus Nonmarked Atlantic Salmon Fry
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DOI：
10.1577/1548-8675(2002)022
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发表时间：
2002-02
影响因子：
1.1
通讯作者：
J. Mohler;M. Millard;J. W. Fletcher
中科院分区：
文献类型：
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作者：
J. Mohler;M. Millard;J. W. Fletcher
用荧光染料钙黄绿素标记的幼年大西洋鲑鱼萨尔莫和其他鱼类在特定的光学条件下在鳍条和其他钙化结构中显示绿色荧光。为了确定是否溪鳟Salvelinus fontinalis会优先捕食钙黄绿素标记的个人，我们介绍了钙黄绿素标记和nonmarked大西洋鲑鱼鱼苗同时圈养野生溪鳟在四个控制室内跑道试验。每个试验由2条溪鳟和100条钙黄绿素标记和未标记的大西洋鲑鱼鱼苗组成;没有个体用于一次以上的试验。在每个3-D试验结束时，捕食者被删除的赛道，和幸存的大西洋鲑鱼鱼苗进行了检查与钙黄绿素检测装置，以计数的标记和非标记的个人。在个别试验中，2溪鳟鱼消耗20和99大西洋鲑鱼鱼苗在3天内（10-49%的可用猎物）。重复拟合优度（G统计）分析.
Abstract Juvenile Atlantic salmon Salmo salar and other fish species marked with the fluorochrome dye calcein exhibit a green fluorescence in fin rays and other calcified structures under specific optical conditions. To determine whether brook trout Salvelinus fontinalis would preferentially prey upon calcein-marked individuals, we introduced calcein-marked and nonmarked Atlantic salmon fry simultaneously to captive wild brook trout in four controlled indoor raceway trials. Each trial consisted of 2 brook trout and 100 each of calcein-marked and nonmarked Atlantic salmon fry; no individuals were used in more than one trial. At the termination of each 3-d trial, predators were removed from raceways, and surviving Atlantic salmon fry were examined with a calcein detection device to tally numbers of marked and nonmarked individuals. In individual trials, 2 brook trout consumed between 20 and 99 Atlantic salmon fry over a 3-d period (10–49% of available prey). Replicated goodness-of-fit (G-statistic) analysis...