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Laboratory spawning of topsmelt, Atherinops affinis , with notes on culture and growth of larvae
Author(s) -
Middaugh D. P.,
Hemmer M. J.,
Anderson B. S.
Publication year - 1992
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620110313
Subject(s) - biology , larva , salinity , morning , zoology , embryo , embryogenesis , ecology , botany , fishery
Topsmelt ( Atherinops affinis ) were spawned repeatedly in the laboratory from May to July 1989. A periodic “temperature spike” from the holding temperature of approximately 18 up to approximately 20.5°C, introduced at 7‐ to 9‐d intervals, resulted in maximum production of viable embryos on the fourth morning after the spike. Examination of embryonic stages and comparison to known developmental rates for Atherinops affinis embryos revealed that spawning was generally nocturnal, occurring between 1900 and 0500 h. Survival of embryonic and larval Atherinops affinis cultured at 21 ± 1°C and 20 ± 2‰ salinity was excellent (>80%). A larval growth curve was developed for the first 24 d post‐hatch.