Fishery-Independent Recruitment Indices for King and Spanish Mackerels

Autor:	Mark R. Collins, Philip P. Maier, Patrick J. Harris
Rok vydání:	1998
Předmět:	Stock assessment Ecology biology Management Monitoring Policy and Law Aquatic Science Fish measurement biology.organism_classification Spanish mackerel Scomberomorus Fishery Bycatch King mackerel Geography Abundance (ecology) Marine fisheries Ecology Evolution Behavior and Systematics
Zdroj:	North American Journal of Fisheries Management. 18:181-186
ISSN:	1548-8675 0275-5947
DOI:	10.1577/1548-8675(1998)018<0181:firifk>2.0.co;2
Popis:	We investigated whether the abundance of age-0 mackerels in a fishery-independent trawl survey could be used to predict abundance at age 1 for king mackerel Scomberomorus cavalla and Spanish mackerel S. maculatus. After deletion of inappropriate length-classes and partitioning by season, depth, and stratum, subsets of the data set were compared to landings data and stock assessment results from the National Marine Fisheries Service. Total landings of age-1 Spanish mackerel were closely predicted (r 2 = 0.91) by catch per unit effort (CPUE) of age-0 fish 11–28 cm in fork length (FL) in samples taken by the Southeast Area Monitoring and Assessment Program-South Atlantic (SEAMAP-SA) during fall from shallow strata in the coastal waters of Georgia and South Carolina (latitudes 30°44′–33°12′N; SEAMAP-SA odd strata 31–49). The best predictor (r 2 = 0.72) for age-1 king mackerel was CPUE of age-0 fish 9–30 cm FL in SEAMAP-SA's fall samples from shallow strata in the coastal waters of South Carolina and ...
Databáze:	OpenAIRE
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