Abstract
The fundamental biological issue for fisheries management is undoubtedly the prevention of recruitment
overfishing, i.e. to prevent the spawning stock from being depleted by fishing to a level where it
significantly reduces the abundance of recruits. However, for many important fisheries, particularly
crustacean fisheries, the stock-recruitment relationship (SRR) is not known. In many cases, research
on recruitment has concentrated on short-term studies of recruitment processes to the exclusion of
research into the SRR which requires development of long term databases.
This paper examines techniques required to model the SRR, using case studies from Western Australian
crustacean fisheries. Outlines of potential problems such as errors and biases in the measurement of
stock and recruitment indices, the time series nature of the data, and lack of stationarity in the data, are
given with possible solutions. Environmental effects, which can greatly influence the abundance of recruits,
may need to be determined before the underlying SRR can be seen. Some of the advantages and possible
disadvantages of incorporating environmental variables in the SRR are examined. A thorough assessment of
SRRs also involves a study of the impact of fishing on the stock and the effect of stochastic variation using
simulations. The evaluation of the SRR requires a multi-disciplinary approach which includes the fields of
biology, environment, economics, population dynamics and statistics.
Subject
Ecology,Aquatic Science,Ecology, Evolution, Behavior and Systematics,Oceanography
Cited by
12 articles.
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