Observation on the early development of landlocked masou salmon ( Oncorhynchus masou) in the low water temperature
Author(s): WANG Zhao-ming, WANG Bing-qian, CHEN-Hui
Pages: 6-10
Year: 2005 Issue: 2
Journal: CHINESE JOURNAL OF FISHERIES
Keyword: 山女鳟; 早期发育; 低温耐性;
Abstract: 将发育积温242℃·d的山女鳟发眼卵置山溪中进行流水孵化.在日均水温4.8℃环境下,发育积温达382℃·d时开始有少数鱼苗孵出.此后在日均2.3～1.5℃,最低0.2℃环境下历时36d,发育积温达456℃·d时全部孵化出膜,孵化率90.2%.最早出膜的孵化稚鱼在日均水温1.5～3.7℃,最低0.2℃环境下历时93d,发育积温达668℃·d时开始上浮.受精后172d发育积温达762℃·d时全部上浮,上浮率77.3%.驯饲一个月的稚鱼育成率63.2%.雏鱼孵化及形态机能发育正常,表明山女鳟在日均水温4.8～1.5℃,最低0.2℃的低温环境中可以正常地进行早期发育.
Pages: 6-10
Year: 2005 Issue: 2
Journal: CHINESE JOURNAL OF FISHERIES
Keyword: 山女鳟; 早期发育; 低温耐性;
Abstract: 将发育积温242℃·d的山女鳟发眼卵置山溪中进行流水孵化.在日均水温4.8℃环境下,发育积温达382℃·d时开始有少数鱼苗孵出.此后在日均2.3～1.5℃,最低0.2℃环境下历时36d,发育积温达456℃·d时全部孵化出膜,孵化率90.2%.最早出膜的孵化稚鱼在日均水温1.5～3.7℃,最低0.2℃环境下历时93d,发育积温达668℃·d时开始上浮.受精后172d发育积温达762℃·d时全部上浮,上浮率77.3%.驯饲一个月的稚鱼育成率63.2%.雏鱼孵化及形态机能发育正常,表明山女鳟在日均水温4.8～1.5℃,最低0.2℃的低温环境中可以正常地进行早期发育.
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