Early life-history studies of nearshore rockfishes and lingcod off Central California, 1987-92

VenTresca, David A. and Houk, James L. and Paddack, Michelle J. and Gingras, Marty L. (1996) Early life-history studies of nearshore rockfishes and lingcod off Central California, 1987-92. Monterey, CA, California Department of Fish and Game Marine Resources Division, (Marine Resources Division Administrative Report, 96-4)

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Abstract

This study focused on the physical and biological processes that influence the distribution, abundance, growth, and survival of young-of-the-year (YOY) rockfishes and lingcod along the central California coast. The annual somatic and reproductive condition of adult female blue rockfish corresponded to annual upwelling. Resulting larval production may correspond to the reproductive potential of adults; however, ultimate recruitment success of YOY is also effected by oceanographic conditions during their planktonic stage. Within a year, each species of settled YOY was observed concurrently and in relatively similar abundances at all study dive sites along the central coast. Most species of YOY exhibited similar growth patterns among stations and years. We found a high degree of interannual variability in the condition of adults and relative abundances of YOY. We believe a large part of this variability is due to annual oceanographic conditions, specifically upwelling. Marine reserves, which would protect populations of reproductively mature rockfishes and lingcod and insure 1arval production, have been suggested as an alternative to present management strategies for these species. However, a crucial question is whether or not larvae from adult fish in reserves would significantly contribute to replenishing stocks in other areas. This study was undertaken to assist in determining the feasibility of reserves to enhance nearshore rockfish and lingcod populations. (78pp.)

Item Type: Monograph or Serial Issue
Title: Early life-history studies of nearshore rockfishes and lingcod off Central California, 1987-92
Personal Creator/Author:
CreatorsEmail
VenTresca, David A.
Houk, James L.
Paddack, Michelle J.
Gingras, Marty L.
Series Name: Marine Resources Division Administrative Report
Number: 96-4
Date: 1996
Publisher: California Department of Fish and Game Marine Resources Division
Place of Publication: Monterey, CA
Latitude: 36.48
Longitude: 121.54
Issuing Agency: California Department of Fish and Game
Uncontrolled Keywords: Lingcod; Ophiodon elongatus; Olive Rockfish; Sebastes serranoides; vermilion rockfish; Sebastes miniatus; Kelp rockfish; Sebastes atrovirens; yellowtail rockfish; Sebastes flavidus; black rockfish; Sebastes melanops; blue rockfish; Sebastes mystinus; California
Subjects: Management
Fisheries
Biology
Item ID: 385
Depositing User: Joan Parker
Date Deposited: 23 Oct 2007 12:23
Last Modified: 29 Sep 2011 22:07
URI: http://aquaticcommons.org/id/eprint/385

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