Development, Survival, and Growth of Larval Weakfish at Different Prey Abundances
作者:
D.M. Goshorn,
C.E. Epifanio,
期刊:
Transactions of the American Fisheries Society
(Taylor Available online 1991)
卷期:
Volume 120,
issue 6
页码: 693-700
ISSN:0002-8487
年代: 1991
DOI:10.1577/1548-8659(1991)120<0693:DSAGOL>2.3.CO;2
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
We reared larvae of weakfishCynoscion regalisat different prey abundances in the laboratory (20.5°C). Larvae began to feed 52 h after hatching. When prey was withheld up to 72 h after larvae had the ability to feed, there was no increase in starvation-induced mortality. However, when prey was withheld more than 24 h, growth was significantly reduced. Times to yolk exhaustion (70 h posthatching) and irreversible starvation (168 h posthatching) were similar to those measured for other marine fishes reared at similar temperatures. We measured growth and mortality of 3–9-d-old larvae at prey abundances approximating those found in Delaware Bay and concluded that natural variations in prey abundance in systems such as Delaware Bay are sufficient to cause large variations in the growth rate of young weakfish larvae.
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