Effect of environmental conditions on the distribution of Pacific mackerel (Scomber japonicus) larvae in the California Current system

Weber, Edward D. and McClatchie, Sam (2012) Effect of environmental conditions on the distribution of Pacific mackerel (Scomber japonicus) larvae in the California Current system. Fishery Bulletin, 110(1), pp. 85-97.

[img]
Preview
PDF (The document's language is English .) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (2856Kb) | Preview
Official URL: http://fishbull.noaa.gov/1101/weber.pdf

Abstract

We modeled the probability of capturing Pacif ic mackerel (Scomber japonicus) larvae as a function of environmental variables for the Southern California Bight (SCB) most years from 1951 through 2008 and Mexican waters offshore of Baja California from 1951 through 1984. The model exhibited acceptable fit, as indicated by the area under a receiver-operating-characteristic curve of 0.80 but was inconsistent with the zero catches that occurred frequently in the 2000s. Two types of spawners overlapped spatially within the survey area: those that exhibited peak spawning during April in the SCB at about 15.5°C and a smaller group that exhibited peak spawning in August near Punta Eugenia, Mexico, at 20°C or greater. The SCB generally had greater zooplankton than Mexican waters but less appropriate (lower) geostrophic f lows. Mexican waters generally exhibited greater predicted habitat quality than the SCB in cold years. Predicted quality of the habitat in the SCB was greater from the 1980s to 2008 than in the earlier years of the survey primarily because temperatures and geostrophic flows were more appropriate for larvae. However, stock size the previous year had a larger effect on predictions than any environmental variable, indicating that larval Pacific mackerel did not fully occupy the suitable habitat during most years.

Item Type: Article
Title: Effect of environmental conditions on the distribution of Pacific mackerel (Scomber japonicus) larvae in the California Current system
Personal Creator/Author:
CreatorsEmail
Weber, Edward D.
McClatchie, Sam
Refereed: Yes
Journal or Publication Title: Fishery Bulletin
Volume: 110
Number: 1
Page Range: pp. 85-97
Date: January 2012
ISSN: 0090-0656
Issuing Agency: United States National Marine Fisheries Service
Subjects: Biology
Ecology
Fisheries
Item ID: 8692
Depositing User: Patti M. Marraro
Date Deposited: 07 Jun 2012 14:48
Last Modified: 07 Jun 2012 14:48
URI: http://aquaticcommons.org/id/eprint/8692

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...