Estimating the Energy Density of Fish: The Importance of Ontogeny

Wuenschel, Mark J. and Jugovich, Amelia R. and Hare, John A. (2006) Estimating the Energy Density of Fish: The Importance of Ontogeny. Transactions of the American FIsheries Society, 135, pp. 379-385.

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Abstract

Ontogenetic patterns in the percent dry weight (%DW) and energy density (joules per gram of wet weight) were studied in the early life stages of the subtropical estuarine and marine gray snapper Lutjanus griseus and the warmtemperate estuarine and marine spotted seatrout Cynoscion nebulosus. The %DW was variable for individuals of both species but increased significantly through larval to juvenile stages (<20% for fish ,50 mm standard length to 20–30% for fish >50 mm). The lipid percentage, which was determined only for gray snapper, was also variable between individuals but showed significant increase with body size. Strong relationships between percent dry weight and energy density were evident for both species; however, the slopes of regressions were significantly lower than in general multispecies models, demonstrating the need for species- and stagespecific energy density data in bioenergetics models.

Item Type: Article
Title: Estimating the Energy Density of Fish: The Importance of Ontogeny
Personal Creator/Author:
CreatorsEmail
Wuenschel, Mark J.
Jugovich, Amelia R.
Hare, John A.
Refereed: Yes
Journal or Publication Title: Transactions of the American FIsheries Society
Volume: 135
Page Range: pp. 379-385
Date: 2006
Issuing Agency: United States National Ocean Service
Subjects: Fisheries
Biology
Item ID: 2104
Depositing User: Patti M. Marraro
Date Deposited: 19 May 2009 16:25
Last Modified: 29 Sep 2011 19:39
URI: http://aquaticcommons.org/id/eprint/2104

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