期刊
EVOLUTION
卷 64, 期 8, 页码 2450-2457出版社
OXFORD UNIV PRESS
DOI: 10.1111/j.1558-5646.2010.00994.x
关键词
Disruptive; latitude; length; marine and freshwater; size-selective mortality; stabilizing
资金
- NSF Biological Oceanography [0623322]
- Directorate For Geosciences
- Division Of Ocean Sciences [0623322] Funding Source: National Science Foundation
Although fitness typically increases with body size and selection gradients on size are generally positive, much of this information comes from terrestrial taxa. In the early life history of fish, there is evidence of selection both for and against larger size, leaving open the question of whether the general pattern for terrestrial taxa is valid for fish. We reviewed studies of size-dependent survival in the early life history of fish and obtained estimates of standardized selection differentials from 40 studies. We found that 77% of estimated selection differentials favored larger size and that the strength of selection was more than five times that seen in terrestrial taxa. Selection decreased with study period duration and initial length, and disruptive selection occurred significantly more frequently than stabilizing selection. Contrary to expectations from Bergmann's rule, selection on size did not increase with latitude.
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