Unknown
NOAA/National Marine Fisheries Service
In:
http://aquaticcommons.org/id/eprint/2786
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403
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2011-09-29 18:28:55
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2786
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United States National Marine Fisheries Service
Publication Date:
2021-06-28
Description:
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.)
Keywords:
Ecology
;
Fisheries
;
Biology
Repository Name:
AquaDocs
Type:
monograph
Format:
application/pdf
Format:
application/pdf
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