Effects of climatic temperature change on growth, survival, and reproduction of rainbow trout: predictions from a simulation model
Authored by Kenneth A Rose, Winkle W Van, BD Holcomb, BJ Shuter, BI Jager
Date Published: 1997
DOI: 10.1139/cjfas-54-11-2526
Sponsors:
United States Department of Energy (DOE)
Electric Power Research Institute (EPRI)
Pacific Gas & Electric (PG&E)
Platforms:
No platforms listed
Model Documentation:
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Model Code URLs:
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Abstract
The effects of changes in the annual temperature cycle on energy
acquisition and the allocation of that energy to respiration, growth, and reproduction of female rainbow trout (Oncorhynchus mykiss) are
evaluated using a new type of simulation model. We tested the effects of
warmer (+2 and +4 degrees C) and cooler (-2 degrees C) water temperature
cycles. We used Monte Carlo filtering techniques to define the range of
parameter sets capable of generating realistic behaviour for individual
female rainbow trout over a single reproductive cycle under the baseline
temperature regime. The base temperature scenario generally resulted in
maximum growth and reproductive success. Shifts in the annual
temperature cycle of +2 and +4 degrees C decreased growth and
reproductive success, but most females were in better physiological
condition. The -2 degrees C scenario resulted in reduced growth, physiological condition, gonad index, and reproductive success. The
effects of shifts in the annual temperature cycle varied substantially
between individual model trout having relatively small differences in
parameter values. These differences may be considered analogs of
genotypic differences among individual trout in the field. The long-term
implications of variability in physiological parameters between
individuals are not easily evaluated experimentally. Models are an ideal
tool for heuristically exploring such implications.
Tags
individual-based models
Fish
Daphnia
Physiological ecology