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Item Identification

Title: Population Charectoristics Of Gulf Menhaden Brevoortia Petromus
Short Name: Population Charectoristics Of Gulf Menhaden Brevoortia Petromus
Status: Completed
Publication Date: 2000-04-01
Abstract:

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.

Keywords

Theme Keywords

Thesaurus Keyword
UNCONTROLLED
None Brevoortia patronus
None Growth
None landings
None life history
None menhaden
None purse seine
None Size at Age
None virtual population analysis

Temporal Keywords

Thesaurus Keyword
UNCONTROLLED
None 1946-1997

Spatial Keywords

Thesaurus Keyword
UNCONTROLLED
None alabama
None florida
None gulf of mexico
None louisiana
None mississippi
None texas

Stratum Keywords

Thesaurus Keyword
UNCONTROLLED
None age
None size
None weight

Physical Location

Organization: Southeast Fisheries Science Center
City: Beaufort
State/Province: NC
Country: USA

Document Information

Document Type: Technical Memorandum (Tech Mem
Format: Acrobat Portable Document Format
Status Code: Published

Support Roles

Point of Contact

CC ID: 285401
Date Effective From: 2015
Date Effective To:
Contact (Person): Mroch, Ray
Address: 101 Pivers Island Rd
Beaufort, NC 28516
Email Address: Ray.Mroch@noaa.gov
Phone: 252-728-0855
Fax: 252-728-8784
View Historical Support Roles

Extents

Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Time Frame 1

CC ID: 171633
Time Frame Type: Range
Start: 1946-01-01
End: 1997-12-31

Access Information

Security Class: Unclassified
Security Handling Description:

This document is available

Data Access Policy:

Available To Everyone

Data Access Procedure:

Get From url

Data Access Constraints:

None

Data Use Constraints:

Please cite appropriately

Metadata Access Constraints:

None

Metadata Use Constraints:

Please cite appropriately

URLs

URL 1

CC ID: 15252
URL: http://spo.nwr.noaa.gov/tr149.pdf

Catalog Details

Catalog Item ID: 5264
GUID: gov.noaa.nmfs.inport:5264
Metadata Record Created By: Lee M Weinberger
Metadata Record Created: 2007-10-03 05:34+0000
Metadata Record Last Modified By: Lee M Weinberger
Metadata Record Last Modified: 2021-10-21 10:35+0000
Metadata Record Published: 2021-10-21
Owner Org: SEFSC
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Next Review Date: 2022-10-22