A Bioenergetics Model for Analysis of Food Consumption Patterns of Bloater in Lake Michigan
- 1 May 1994
- journal article
- Published by Oxford University Press (OUP) in Transactions of the American Fisheries Society
- Vol. 123 (3) , 344-357
- https://doi.org/10.1577/1548-8659(1994)123<0344:abmfao>2.3.co;2
Abstract
We developed a bioenergetics model for bloater Coregonus hoyi based on a synthesis of studies on the energetics of bloater and other coregonines. This model was applied to the Lake Michigan population with information on water content, gonad weight, energy density, diet, and thermal history. Water content (inversely correlated with energy density) of nonspawning Lake Michigan bloaters decreased linearly with increasing weight for fish smaller than 155 g. Model results indicated comparatively small seasonal changes in consumption, a result of high consumption by bloaters at low temperatures and relatively small differences in the temperatures of occupied water between winter and summer. Growth rates and food conversion efficiencies of bloater estimated from the model were higher by factors of 2–4 than comparable values for the alewife Alosa pseudoharengus, indicating that Lake Michigan could support a higher biomass of native coregonines than of the introduced alewife. Bioenergetics estimates of a...Keywords
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