Absence of Size-Selective Mortality among Larval Smallmouth Bass in a Virginia Stream
作者:
MatthewJ. Sabo,
DonaldJ. Orth,
期刊:
Transactions of the American Fisheries Society
(Taylor Available online 1996)
卷期:
Volume 125,
issue 6
页码: 920-924
ISSN:0002-8487
年代: 1996
DOI:10.1577/1548-8659(1996)125<0920:AOSSMA>2.3.CO;2
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
In 1990 and 1991, we collected larval smallmouth bassMicropterus dolomieu7–25 d after swim-up and juveniles 5–9 weeks after swim-up. Using otolith analysis, we compared the size distributions of larvae and juveniles at identical life stages (6, 12, and 24 d after swim-up). In both years, there was little evidence to suggest that the individuals that survived to become juveniles were statistically larger than the average larvae at any stage. Larval smallmouth bass in this system were probably most susceptible to predators that were not gape-limited and therefore did not experience size-selective mortality.
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