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Respiratory Responses of Largemouth Bass (Micropterus salmoides) to Environmental Changes in Temperature and Dissolved Oxygen
Author(s) -
Cech Joseph J.,
Campagna Clain G.,
Mitchell Stephen J.
Publication year - 1979
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(1979)108<166:rrolbm>2.0.co;2
Subject(s) - micropterus , bass (fish) , respirometer , oxygen , anaerobic exercise , torr , zoology , biology , environmental chemistry , chemistry , fishery , physiology , organic chemistry , physics , thermodynamics
Respiratory metabolic rates of largemouth bass, Micropterus salmoides, were measured in flow through respirometers under various temperature and dissolved oxygen conditions simulating drought environments. “Critical” oxygen tensions increased from <40 torr PO 2 at 20 C, to 40–50 torr at 25 C, to 50–60 torr at 30 C. Evidence from arterial blood samples indicated increased anaerobic metabolism associated with an oxidative metabolic depression at high temperatures and low dissolved oxygen concentrations. Procedures to maintain 2.60 mg O 2 /liter at 25 C and 2.85 mg O 2 /liter at 30 C in largemouth bass habitats should minimize adult mortalities linked to insufficient oxygen.