期刊名称：Western Australia. Fisheries Department. Fisheries Research Reports
印刷版ISSN：1035-4549
出版年度：2006
卷号：154
出版社：Government of Western Australia / Department of Fisheries
摘要：Uncertainty around the mechanisms and life stages that provide the most accurate prediction of
year class strength and future catches (Sundby et al. 1989) has contributed to a lack of consistent
methods to study such relationships, which has hampered stock assessment development in
some cases (Shepard, 1997). The cod (Gadus morhua) is one of the few fish for which detailed
temporal, spatial and environmental information exists for recruitment indices, mortality rates
of early life-history stages and relationships between recruitment and future catches (Campana
et al. 1989, Sundby et al. 1989, Myers and Cadigan 1993a, Helle et al. 2000 and others). Some
of this stock-prediction research was developed to aid efforts in understanding the causes of the
decline in cod stocks from the northwestern Atlantic; while research on Arcto-Norwegian cod
stocks has been initiated in an effort to recommend a consensus approach amongst researchers
for assessing recruitment-catch relationships. This issue was addressed by the ICES Working
Group on the Methods of Fish Stock Assessment convened in the mid- 1980s and resulted in
the use of a regression and combination methods assessment (Shepard 1997).
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