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Fishery‐Independent Recruitment Indices for King and Spanish Mackerels
Author(s) -
Collins Mark R.,
Harris Patrick J.,
Maier Philip P.
Publication year - 1998
Publication title -
north american journal of fisheries management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.587
H-Index - 72
eISSN - 1548-8675
pISSN - 0275-5947
DOI - 10.1577/1548-8675(1998)018<0181:firifk>2.0.co;2
Subject(s) - fishery , fish measurement , stock assessment , catch per unit effort , geography , mackerel , fishing , bycatch , abundance (ecology) , oceanography , fish <actinopterygii> , environmental science , biology , geology
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 North Carolina (32°04′–35°15′N; SEAMAP‐SA odd strata 41–67) collected the previous year. The indices should be used with caution until data from additional years become available for verification and incorporation.