Distribution and co-occurrence of rockfishes (family: Sebastidae) over trawlable shelf and slope habitats of California and southern Oregon Item Type article Authors Williams, Erik H.; Ralston, Stephen Download date 23/09/2021 19:56:34 Link to Item http://hdl.handle.net/1834/31105 836 Abstract–The rockfishes of the se Distribution and co-occurrence of rockfishes bastid genus Sebastes are a very impor tant fishery resource off the coasts of (family: Sebastidae) over trawlable shelf and California and southern Oregon. How- ever, many of the 54 managed stocks slope habitats of California and southern Oregon of west coast rockfish have recently reached historically low population Erik H. Williams levels, leading fishery managers to re- examine current management prac Stephen Ralston tices. Management of rockfish stocks as Southwest Fisheries Science Center multispecies aggregates, as opposed to National Marine Fisheries Service independent stocks within the ground- 110 Shaffer Road fish fishery, can be more desirable when Santa Cruz, California 95060 nontargeted bycatch, discard, and man Present address (for E H. Williams): Southeast Fisheries Science Center agement complexity are considered. National Marine Fisheries Service Rockfish assemblage structure and 101 Pivers Island Road species co-occurrences were determined Beaufort, North Carolina 28516-9722 by using data from the Alaska Fisher E-mail address (for E. H. Williams):
[email protected] ies Science Center triennial continental shelf bottom trawl survey. The weight of rockfish species in trawl catches was expressed as a catch-per-unit-of-effort (CPUE) statistic, from which species spatial distributions, overlaps, diver Rockfishes (family Sebastidae accord- tional Marine Fisheries Service.