5264 Population Characteristics Of Gulf Menhaden Brevoortia Petromus Document Published / External 5242 Menhaden Research Project Completed 2000-04-01 The status of the Gulf menhaden, Brevoortia patronus, fishery was assessed with purse-seine landings data from 1946 to 1997 and port sampling data from 1964 to 1997. These data were analyzed to determine growth rates, biological reference points for fi shing mortality from yield per recruit and maximum spawning potential analyses, spawner-recruit relationships, and maximum sustainable yield (MSY). The separable virtual population approach was used for the period 1976?97 (augmented by earlier analyses for 1964?75) to obtain point estimates of stock size, recruits to age 1, spawning stock size, and fishing mortality rates. Exploitation rates for age-1 fish ranged between 11% and 45%, for age-2 fi sh between 32% and 72%, and for age-3 fish between 32% and 76%. Biological reference points from yield per recruit (F0.1: 1.5?2.5/yr)and spawning potential ratio (F20: 1.3?1.9/yr and F30: 0.8?1.2/yr) were obtained for comparison with recent estimates of F (0.6?0.8/yr). Recent spawning stock estimates (as biomass or eggs) are above the long-term average, while recent recruits to age 1 are comparable to the long-term average. Parameters from Ricker-type spawner-recruit relations were estimated, although considerable unexplained variability remained. Recent survival to age-1 recruitment has generally been below that expected based on the Ricker spawner-recruit relation. Estimates of longterm MSY from PRODFIT and ASPIC estimation of production model ranged between 717,000 t and 753,000 t, respectively. Declines in landings between 1988 and 1992 raised concerns about the status of the Gulf menhaden stock. Landings have fluctuated without trend since 1992, averaging about 571,000 t. However, Gulf menhaden are short lived and highly fecund. Thus, variation in recruitment to age 1, largely mediated by environmental conditions, influences fishing successover the next two years (as age-1 and age-2 fi sh). Comparisons of recent estimates of fishing mortality to biological reference points do not suggest overfishing. Theme Brevoortia patronus Theme Growth Theme Size at Age Theme landings Theme life history Theme menhaden Theme purse seine Theme virtual population analysis Temporal 1946-1997 Spatial alabama Spatial florida Spatial gulf of mexico Spatial louisiana Spatial mississippi Spatial texas Technical Memorandum (Tech Mem Acrobat Portable Document Format Published Author 1998-01-01 2015-06 Person Smith, Joseph W joseph.w.smith@noaa.gov 101 Pivers Island Road Beaufort NC 28516 252-728-8765 252-728-8784 Joe Has Retired Co-Author 2000 Person Prager, Michael H web@mhprager.com https://www.mhprager.com/ Mike Prager Home Page Online Resource Distributor 2000 Organization Southeast Fisheries Science Center SEFSC https://ror.org/0396y0w87 75 Virginia Beach Drive Miami FL 33149 USA (305)361-5761 https://www.fisheries.noaa.gov/about/southeast-fisheries-science-center About SEFSC Online Resource 8:00 a.m. - 4:30 p.m. EST Point of Contact 2015 Person Mroch, Ray Ray.Mroch@noaa.gov 101 Pivers Island Rd Beaufort NC 28516 252-728-0855 252-728-8784 Ground Condition Range 1946-01-01 1997-12-31 Unclassified This document is available Available To Everyone Get From url None Please cite appropriately None Please cite appropriately https://spo.nmfs.noaa.gov/sites/default/files/legacy-pdfs/tr149.pdf tr149.pdf https://spo.nmfs.noaa.gov/sites/default/files/legacy-pdfs/tr149.pdf Online Resource NOAA Technical Report NMFS 149 April 2000 U.S. Department of Commerce Population Characteristics of Gulf Menhaden, Brevoortia patronus gov.noaa.nmfs.inport:5264 Lee Weinberger 2007-10-03T05:34:28 SysAdmin InPortAdmin 2026-03-04T19:17:18 2021-10-21 Southeast Fisheries Science Center SEFSC 75 Virginia Beach Drive Miami FL 33149 USA (305)361-5761 www.sefsc.noaa.gov 8:00 a.m. - 4:30 p.m. EST 1001 Public No 2021-10-21 1 Year 2022-10-21