Individual growth and phase differentiation of lacustrine masu salmon, Oncorhynchus masou, under artificial rearing conditions
Individual growth and phase differentiation of lacustrine masu salmon, Oncorhynchus masou, under artificial rearing conditions
复制标题
人工饲养条件下湖相马苏鲑鱼Oncorhynchus masou的个体生长和阶段分化
DOI：
10.1007/s102280200061
复制
发表时间：
2002
影响因子：
1.2
通讯作者：
K. Maekawa
中科院分区：
文献类型：
--
作者：
T. Tamate;K. Maekawa
在人工饲养条件下，研究了苏玛利奈湖人工湖泊中生长的淡水马哈鱼(Oncorhynchus Masou)幼体生长与阶段分化的关系。在雌性中，潜在的(随后的)1+solys和潜在的1+parr(1+parr表明鱼在1+秋季之前既没有阴燃也没有成熟)的平均叉长在它们的第一个夏天(0+夏天)之后总是不同的，前者更大。在雄性中，在第一个春天生长较快的幼虫成为0+成熟的雄性PARR。在第一个夏天之后，潜在的1+Smolts的体长总是大于潜在的1+成熟PARR和潜在的1+PARR。这些结果与以前关于淡水马苏鲑鱼的报道相似，表明所研究的湖泊马苏鲑鱼似乎保持了与原始鱼类一样的阶段分化，可能是因为距离湖泊种群的形成只有60年的时间。
In lacustrine masu salmon,Oncorhynchus masou, originated from anadromous fish and inhabiting an artificial lake (Shumarinai Lake), we examined the relationship between individual growth during the juvenile stage and phase differentiation under artificial rearing conditions. In females, the mean fork length of potential (subsequent) 1+ smolts and potential 1+ parr (1+ parr show fish that neither smolted nor matured until 1+ autumn) always differed after their first summer (0+ summer), the former being larger. In males, the juveniles that grew faster during their first spring became 0+ mature male parr. After their first summer, potential 1+ smolts were always larger in body length than potential 1+ mature parr and potential 1+ parr. These results were similar to previous reports of anadromous masu salmon, suggesting that the lacustrine masu salmon studied seems to have maintained the phase differentiation as in the original fish, likely because only 60 years have passed since the formation of the lacustrine population.