Invasive range expansion by the Humboldt squid, Dosidicus gigas, in the eastern North Pacific

A unique 16-year time series of deep video surveys in Monterey Bay reveals that the Humboldt squid, Dosidicus gigas, has substantially expanded its perennial geographic range in the eastern North Pacific by invading the waters off central California. This sustained range expansion coincides with cha...

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Published inProceedings of the National Academy of Sciences - PNAS Vol. 104; no. 31; pp. 12948 - 12950
Main Authors Zeidberg, Louis D, Robison, Bruce H
Format Journal Article
LanguageEnglish
Published United States National Academy of Sciences 31.07.2007
National Acad Sciences
Subjects
Animals
Biological Sciences
California
Climate
Climate change
Climate models
Coasts
Decapodiformes - physiology
Dosidicus gigas
Ecological invasion
Ecosystem
Hake
Marine
Marine Biology
Marine fishes
Merluccius productus
Mollusks
Nonnative species
Oceanography
Pacific Ocean
Population Dynamics
Population ecology
Predation
Predators
Species
Squid
Temperature
Time Factors
Time series
Pacific Ocean
California
Monterey Bay
INE, USA, California, Monterey Bay
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Summary:A unique 16-year time series of deep video surveys in Monterey Bay reveals that the Humboldt squid, Dosidicus gigas, has substantially expanded its perennial geographic range in the eastern North Pacific by invading the waters off central California. This sustained range expansion coincides with changes in climate-linked oceanographic conditions and a reduction in competing top predators. It is also coincident with a decline in the abundance of Pacific hake, the most important commercial groundfish species off western North America. Recognizing the interactive effects of multiple changes in the environment is an issue of growing concern in ocean conservation and sustainability research.
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Present address: Hopkins Marine Station of Stanford University, Pacific Grove, CA 93950.
Edited by David M. Karl, University of Hawaii, Honolulu, HI, and approved June 26, 2007
Author contributions: B.H.R. designed research; B.H.R. performed research; L.D.Z. analyzed data; and L.D.Z. and B.H.R. wrote the paper.
ISSN:0027-8424
1091-6490
DOI:10.1073/pnas.0702043104