Title

Bioenergetics Approach to Modeling Striped Bass and Threadfin Shad Predator-Prey Dynamics in Lake Powell, Utah-Arizona

Document Type

Presentation

Journal/Book Title/Conference

Transactions of the American Fisheries Society

Volume

137

Issue

1

Publication Date

2008

First Page

262

Last Page

277

Abstract

An understanding of the mechanisms driving the cyclic relationship between piscivorous sport fish and their food base is needed in systems where predator and prey are tightly coupled. To understand the dynamics between striped bass Morone saxatilis and threadfin shad Dorosoma petenense in Lake Powell, Utah-Arizona, we (1) synthesized and evaluated 20 years of historical data on temperature, diet, growth, and abundance of these fish, (2) collected similar data on a finer scale in 2003-2004, (3) used components of this data set to develop specific conversions between coarser historic data and present data, and (4) modeled striped bass and threadfin shad dynamics within a bioenergetics framework. We estimated the consumption of threadfin shad by age-0, subadult, and adult striped bass in Lake Powell from 1985 to 2003...

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