An egg production method for estimating spawning biomass of pelagic fish: Application to the northern anchovy, Engraulis mordax

Lasker, Reuben (ed.) (1985) An egg production method for estimating spawning biomass of pelagic fish: Application to the northern anchovy, Engraulis mordax. NOAA/National Marine Fisheries Service, (NOAA Technical Report NMFS, 36)

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Abstract

Fishery scientists engaged in estimating the size of free-swimming populations have never had a technique available to them whereby all the parameters could be estimated from a resource survey and where no parameter values need to be assumed. Recognizing the need for a technique of this kind, the staff of the Coastal Fisheries Resources Division of the Southwest Fisheries Center (SWFC) devised an egg production method for anchovy biomass assessment. Previously, anchovy biomass was estimated by approximate methods derived from a long-time series and anchovy larval abundance, which required about 5 ma of shiptime each year to integrate the area under a seasonal spawning curve. One major assumption used in the larval abundance census method is that there is constant proportionality between larval numbers and spawning biomass. This has now proved to be erroneous. (PDF file contains 105 pages.)

Item Type: Monograph or Serial Issue
Title: An egg production method for estimating spawning biomass of pelagic fish: Application to the northern anchovy, Engraulis mordax
Editors:
EditorsEmail
Lasker, Reuben
Series Name: NOAA Technical Report NMFS
Number: 36
Date: 1985
Publisher: NOAA/National Marine Fisheries Service
Issuing Agency: United States National Marine Fisheries Service
Subjects: Ecology
Fisheries
Biology
Item ID: 2786
Depositing User: Patti M. Marraro
Date Deposited: 10 Nov 2009 12:28
Last Modified: 29 Sep 2011 18:28
URI: http://aquaticcommons.org/id/eprint/2786

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