Metabolic scaling,buoyancy, and growth in larval Atlantic menhaden,Brevoortia tyrannus |
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Authors: | J H Power P J Walsh |
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Institution: | (1) Coastal Fisheries Institute, Louisiana State University, 70803 Baton Rouge, Louisiana, USA;(2) Division of Marine Biology and Fisheries, Rosenstiel School of Marine and Atmospheric Sciences, 4600 Rickenbacker Causeway, 33149 Miami, Florida, USA |
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Abstract: | We measured growth of larval Atlantic menhaden, Brevoortia tyrannus in terms of mass, volume, and weight in water as well as the mass-specific activities of the metabolic enzymes citrate synthase, lactate dehydrogenase, and malate dehydrogenase. Weight in water, the force the fish must exert to maintain vertical position, increases by a factor of 18 in larvae growing from 10 to 15 mm. The weight increase coincides with the development of the larval swim bladder. The activities of all three enzymes per unit mass of fish tissue decline greatly over this time period, indicating that the fish does not further develop its aerobic and anaerobic metabolic capacity for swimming during this growth interval. |
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