AQUATIC PRODUCTIVITY AND THE EVOLUTION OF DIADROMOUS FISH MIGRATION
AQUATIC PRODUCTIVITY AND THE EVOLUTION OF DIADROMOUS FISH MIGRATION
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DOI：
10.1126/science.239.4845.1291
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发表时间：
1988-03-11
期刊：
影响因子：
56.9
通讯作者：
MCDOWALL, RM
中科院分区：
文献类型：
--
作者：
GROSS, MR;COLEMAN, RM;MCDOWALL, RM
一些鱼类从淡水洄游并在海洋中觅食（溯河洄游），另一些鱼类从海洋洄游并在淡水中觅食（溯河洄游），这一现象长期以来一直令人困惑。然而，当从水生生产力的全球格局来考察双产卵物种的分布时，这个明显的悖论就得到了解决。迁徙方向的差异很大程度上可以用海洋和淡水栖息地食物资源的相对可得性来解释。在温带地区，海洋比淡水更富有生产力，并且溯河物种占主导地位。相反，地生物种一般出现在淡水生产力超过海洋的热带纬度地区。
Diadromous migration, in which some fish species migrate from freshwater and feed in the ocean (anadromous species) and others migrate from the ocean and feed in freshwater (catadromous), has long been perplexing. However, when the distribution of diadromous species is examined with respect to global patterns in aquatic productivity, this apparent paradox is resolved. The contrasting directions of migration can largely be explained by the relative availability of food resources in ocean and freshwater habitats. Oceans are more productive than freshwaters in temperate latitudes, and anadromous species predominate. In contrast, catadromous species generally occur in tropical latitudes where freshwater productivity exceeds that of the ocean.