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Survival of Largemouth Bass Embryos at Low Dissolved Oxygen Concentrations
Author(s) -
Dudley Richard G.,
Eipper A. W.
Publication year - 1975
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1975)104<122:solbea>2.0.co;2
Subject(s) - bass (fish) , fishery , oxygen , biology , environmental science , chemistry , organic chemistry
We identified the low oxygen concentrations that significantly decreased survival of largemouth bass (Micropterus salmoides) embryos incubated at three temperatures in both stationary and moving containers. Embryos developed and hatched at oxygen concentrations as low as 1.0, 1.1, and 1.3 mg/liter at temperatures of 15, 20, and 25 C, respectively, but concentrations below 2.0, 2.1, and 2.8 mg/liter significantly lowered survival. Most mortality at these oxygen concentrations occurred during hatching. At oxygen concentrations below 1.0 mg/liter, survival during the prehatching period was higher among those groups of embryos that were moved slowly up and down during incubation than among unmoved embryos; however, moved embryos suffered nearly complete mortality during hatching at all oxygen concentrations.