Details:

Personal Author:
Lo, Nancy C. H. ; Macewicz, Beverly J. ; Griffith, David A. (David Anthony) ;
Lo, Nancy C. H. ; Macewicz, Beverly J. ; Griffith, David A. (David Anthony) ; Less -
Corporate Authors:
Southwest Fisheries Science Center (U.S.) ;
NOAA Program & Office:
NMFS (National Marine Fisheries Service) ; SWFSC (Southwest Fisheries Science Center) ;
NMFS (National Marine Fisheries Service) ; SWFSC (Southwest Fisheries Science Center) ; Less -
Description:
"The estimates of spawning biomass of the Pacific sardine off California in 1994 - 2010 based on the traditional method are: 127,000 mt, 80,000 mt, 83,000 mt, 410,000 mt, 314,000 mt, 282,000 mt, 1.06 million mt, 791,000 mt, 206,000 mt, 485,000 mt, 300,000 mt, 600,000 mt, 837,000 mt, 392,00 mt, 117,000 mt, 185,000 and 108,000mt (for the standard DEPM area), respectively. These estimates of spawning biomass indicate that there has been considerable fluctuation during this time (the peaks occurred in 2000 and 2006) and that biomass has declined in the recent three years. The time series of spawning biomass was one of the fishery independent inputs to the annual stock assessment of the Pacific sardine from 1985 - 2008. Since 2009, the time series of spawning biomass was replaced by female spawning biomass for years when sufficient trawl samples were available and the total egg production for other years as inputs to the stock assessment of Pacific sardine"--summary.
Content Notes:
Nancy C. H. Lo, Beverly J. Macewicz, and David A. Griffith. "October 2010." Mode of access: World Wide Web. System requirements: Adobe Acrobat Reader. Includes bibliographical references (p. 17-19).
Keywords:
[+]
Counting
Eggs
Estimates
Fish Populations
Sardine Fisheries
Sardinops Sagax
Spawning

Series:
NOAA-TM-NMFS-SWFSC ; 463; NOAA technical memorandum NMFS ;
NOAA-TM-NMFS-SWFSC ; 463; NOAA technical memorandum NMFS ; Less -
Document Type:
Technical Memorandum ;
Place as Subject:
Pacific Coast (U.S.) ;
Rights Information:
Public Domain
Compliance:
Library
Main Document Checksum:
[+]
urn:sha256:db9cd783044f8e1a4426d7bb8691a42b51919216d7cf2e7dbe841f254bd8c937
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