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The study of bycatch mortality in the laboratory can be viewed in a series of steps. The investigator moves from a conceptual model of bycatch mortality, through understanding what factors cause mortality, to the use of bycatch prediction tools in field fishing experiments. Traditional studies of bycatch mortality have used fishing experiments to measure immediate and delayed mortality of discards and escapees that were captured and held in sea cages or tagged and recaptured. Rates of experimental mortality were then correlated with fishing conditions and potential bycatch mortality was modeled statistically. The disadvantages of this field approach are that fish must be held or monitored for long periods of time in the field, and few experiments can be conducted because of the complex logistics for holding fish. Here we describe a laboratory approach which identifies fishing stressors that potentially cause mortality and leads to the development of more efficient methods for conducting field fishing experiments.
Research Topic 1: Fish and Environment
Research Topic 2: Fish Habitat
Research Topic 3: Bycatch Mortality
Research Topic 4: Fishing Gear
Last updated 27 March, 2009