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Stock Assessment Model for the Shortbelly Rockfish, Sebastes Jordani, in the California Current

John C. FieldEdward J. DickAlec D. MacCall

出版	U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Southwest Fisheries Science Center, 2007
URL	http://books.google.com.hk/books?id=nSh3AQAACAAJ&hl=&source=gbs_api

註釋"The shortbelly rockfish, Sebastes jordani, is one of the most abundant rockfish species in the California Current, and is a key forage species for many piscivorous fish, birds, and marine mammals. This species has not been the target of commercial fisheries, and consequently catch data are limited. Nevertheless, available evidence suggests that the population has undergone significant fluctuations in abundance over the last several decades. The most robust result was a substantial decline in relative abundance between the late 1980s through the 1990s and into the present (~2006). We present a population model, using standard assessment methods and a variety of survey and food habits data, to investigate population changes for this ecologically important species. The results from this analysis provide an opportunity to consider the dynamic nature of an unexploited rockfish population, and should ultimately provide insight into the potential causes and consequences of natural population variability on both exploited and non-exploited populations throughout the California Current. This model and documentation were evaluated and revised during a three day review panel in June 2006 attended by Dr. Chris Francis, Dr. William Lenarz, Dr. George Watters and Mr. Tom Ghio; reports from Dr. Francis and Dr. Lenarz are included as appendices to this memorandum. This documentation also supplements the manuscript on shortbelly rockfish population dynamics published as Field et al. (in press)"--Summary (p. 1).