Plasticity of smolting in spring chinook salmon: relation to growth and insulin-like growth factor-I
Plasticity of smolting in spring chinook salmon: relation to growth and insulin-like growth factor-I
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DOI：
10.1111/j.1095-8649.1998.tb01834.x
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发表时间：
1998-10-01
影响因子：
2
通讯作者：
Dickhoff, WW
中科院分区：
文献类型：
--
作者：
Beckman, BR;Dickhoff, WW
在两个年级的Willamette河春季Chinook三文鱼中，饲养于Willamette孵化场，以及两组亚基马河春Chinook三文鱼，一组取自Yakima河，另一组在孵化场饲养，根据鳃Na+K+ATPase活性的增加衡量，夏秋季生长速度相对较快的鱼类在秋季熔化。相比之下，增长率相对较低的群体在秋季没有闻到气味。血浆胰岛素样生长因子-I(IGF-I)水平在不同组间有不同程度的差异，高水平与鳃Na+K+ATPase活性增加有关。这些结果表明，春节鲑鱼的熔炼是可塑性的，发生在秋季或春季。此外，冶炼似乎与增长速度有关；然而，所显示的关系是相关的，原因机制尚未阐明。然而，这些结果确实表明了生长、内分泌生长测量仪和冶炼之间的关系，表明发育可塑性与内分泌系统调节的环境之间存在机械联系。(C)1998年不列颠群岛渔业协会。
In two year classes of Willamette River spring chinook salmon, reared at the Willamette Hatchery, and two groups of Yakima River spring chinook salmon, one sampled from the Yakima River and the other reared in a hatchery, fish which had relatively high growth rates in the summer-autumn period smelted in the autumn as measured by increases in gill Na+ K+ ATPase activity. In contrast, groups with relatively low growth rate did not smelt in the autumn. Plasma levels of insulin-like growth factor-I (IGF-I) showed discrete differences between groups, with high levels associated with increased gill Na+ K+ ATPase activities. These results demonstrate that smelting is plastic in spring chinook salmon, occurring in the autumn or the spring. In addition, smelting appeared to be related to growth rate; however, the relationships shown were correlational and causal mechanisms were not elucidated. Yet, the results do indicate a relationship between growth, an endocrine growth meter and smelting, suggesting a mechanistic link between developmental plasticity and the environment mediated by the endocrine system. (C) 1998 The Fisheries Society of the British Isles.