Source water variability as a driver of rockfish recruitment in the California Current Ecosystem: implications for climate change and fisheries management
OCEAN MODELING SYSTEM
; NORTHERN CALIFORNIA
; SEBASTES SPP.
; WEST-COAST
; ENVIRONMENTAL-CONDITIONS
; INTERANNUAL VARIATION
; JUVENILE ROCKFISHES
; DEMERSAL FISH
; BIOMASS
; IMPACTS
WOS学科分类:
Fisheries
; Marine & Freshwater Biology
WOS研究方向:
Fisheries
; Marine & Freshwater Biology
英文摘要:
Elucidating connections between ocean climate variability and change and recruitment of juvenile fishes to adult populations is critical for understanding variability in stock-recruit dynamics. Recruitment to adult rockfish populations in the California Current Ecosystem (CCE) is highly variable, leading to short-and long-term changes in abundance, productivity, forage availability, and potential fisheries yield. We used regional ocean model output, oceanographic data, and a 34-year time series of pelagic juvenile rockfish to investigate the interaction between changes in CCE source waters, as reflected by physical water mass properties, and recruitment variability. Specifically, variability of "spiciness" on upper water isopycnals explains a substantial fraction of the variation in pelagic juvenile rockfish abundance. High rockfish abundances correspond to cooler, fresher waters with higher dissolved oxygen (i.e., "minty") conditions, indicative of Pacific subarctic water. By contrast, years of low rockfish abundance are associated with warmer, more saline, and more oxygen-deficient (i.e., "spicy") conditions, reflecting waters of subtropical or equatorial origin. Transport and source waters in the CCE are key factors determining density-independent processes and subsequent recruitment to adult populations.
1.Univ Calif Santa Cruz, Inst Marine Sci, 100 McAllister Way, Santa Cruz, CA 95060 USA 2.Natl Marine Fisheries Serv, Environm Res Div, Southwest Fisheries Sci Ctr, NOAA, 99 Pacific St,Suite 225A, Monterey, CA 93940 USA 3.Univ Calif Santa Cruz, CIMEC, 110 McAllister Way, Santa Cruz, CA 95060 USA 4.Univ Calif Santa Cruz, Dept Appl Math & Stat, 1156 High St, Santa Cruz, CA 95060 USA 5.Natl Marine Fisheries Serv, Fisheries Ecol Div, Southwest Fisheries Sci Ctr, NOAA, 110 McAllister Way, Santa Cruz, CA 95060 USA 6.Univ Calif Santa Cruz, Dept Ocean Sci, 1156 High St, Santa Cruz, CA 95065 USA
Recommended Citation:
Schroeder, Isaac D.,Santora, Jarrod A.,Bograd, Steven J.,et al. Source water variability as a driver of rockfish recruitment in the California Current Ecosystem: implications for climate change and fisheries management[J]. CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES,2019-01-01,76(6):950-960