Mass-marking of brown trout (Salmo trutta L.) larvae by alizarin:: method and evaluation of stocking
Mass-marking of brown trout (Salmo trutta L.) larvae by alizarin:: method and evaluation of stocking
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DOI：
10.1111/j.1439-0426.2007.01038.x
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发表时间：
2008-02-01
影响因子：
0.9
通讯作者：
Roesch, R.
中科院分区：
文献类型：
--
作者：
Baer, J.;Roesch, R.
本研究描述了通过浸泡在不同的茜素红 S (ARS) 溶液中对褐鳟 (Salmo trutta L.) 幼虫进行耳石标记。用浓度为150 mg L-1的ARS标记后获得最佳结果。为了评估褐鳟鱼苗放养的效率，在 2002 年和 2003 年用 ARS 标记了 10 000 只 20 天的幼体，并在 2 周后将其释放到自然褐鳟繁殖的河段中。 2002年放养后两个月进行的电捕捞调查显示，捕获的当年鳟鱼中只有4.8%来自放养； 2003年这一比例为8.9%。鉴于自然繁殖量大，且放养鳟鱼与野生鳟鱼的比例较低，建议停止放养。
This study describes otolith marking of brown trout (Salmo trutta L.) larvae by immersion in different solutions of alizarin red S (ARS). The best results were obtained after marking with ARS at a concentration of 150 mg L-1. To evaluate the efficiency of stocking with brown trout fry, 10 000 20-day-old larvae were marked in years 2002 and 2003 with ARS and released 2 weeks later into sections of a river with natural brown trout reproduction. Electro-fishing surveys carried out 2 months after stocking in 2002 revealed that only 4.8% of all caught young-of-the-year trout originated from stocking; in 2003 the percentage was 8.9%. Based on the substantial natural reproduction and the low ratio of stocked to wild trout, it was recommended to discontinue stocking.