Record Display for the EPA National Library Catalog

RECORD NUMBER: 47 OF 57

OLS Field Name OLS Field Data
Main Title Oxygen Requirements of Embryos and Larvae of the Largemouth Bass, 'Micropterus salmoides' (Lacpede).
Author Spoor., W. A. ;
CORP Author Environmental Research Lab.-Duluth, Minn.
Year Published 1976
Report Number EPA/600/J-77/114;
Stock Number PB-278 588
Additional Subjects Bass ; Fishes ; Oxygen ; Hypoxia ; Embryos ; Larvae ; Concentration(Composition) ; Temperature ; Effectiveness ; Animal behavior ; Growth ; Stress(Physiology) ; Respiration ; Reprints ; Micropterus salmoides
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB-278 588 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 11p
Abstract
Starting with the second day after fertilization, largemouth bass embryos and larvae became increasingly sensitive to oxygen deficiency until the sixth day of life. On this day few survived exposure to 1 mg O2/l for 3 h at 20C; many were damaged at 2 mg/l, but not at 2.5. Death was by asphyxiation or by starvation resulting from an apparent inability to close the lower jaw. On the seventh day the larvae became more resistant again, possibly because opercular movement began on that day. At 25C the effects of reduced oxygen concentration were intensified, and even a concentration of 2.5 mg/l became lethal in 3 h. At 3 mg O2/l and 20C the normally quiescent yolk-sac larvae became very active and swam vertically to at least 5 or 6 cm above the substrate; 4 and 5 mg/l had this effect at 23-24C. This behavior could result in losses by predation and displacement from the nest.