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Acoustic-trawl estimates of northern-stock Pacific sardine biomass during 2015
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2016
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[PDF-898.70 KB]
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Description:"The biomass of the northern stock of sardine during spring 2015 was estimated using the acoustic-trawl method (ATM) to be 29,048 metric tons (t), CV = 29.9%. The stock comprised two modal lengths. The larger sardine are primarily the remnant of a stronger than average recruitment from 2010, and the smaller ones were likely sardine spawned in 2014. The ATM-estimated sardine biomass during summer 2015 was 15,870 t, CV = 80.2%. In addition to the dominant 2010 and 2014 year-classes observed in the spring, the stock also included recruits from 2015. In summer 2015, the biomass of the northern stock of sardine was the lowest, and the extent of the summer migration was the shortest since the ATM surveys began in 2006"--Summary [doi:10.7289/V5/TM-SWFSC-559 (http://dx.doi.org/10.7289/V5/TM-SWFSC-559)]
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Content Notes:Juan P. Zwolinski, David A. Demer, Beverly J. Macewicz, George R. Cutter, Brian Elliot, Scott Mau, David Murfin, Josiah S. Renfree, Thomas S. Sessions, Kevin Stierhoff.
"April 2016."
System requirements: Adobe Acrobat Reader.
Includes bibliographical references (pages 5-7).
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Rights Information:Public Domain
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