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dc.contributor.authorNavarro, M.O.
dc.contributor.authorParnell, P.E.
dc.contributor.authorLevin, L.A.
dc.date.accessioned2019-04-05T18:14:31Z
dc.date.available2019-04-05T18:14:31Z
dc.date.issued2018-08-01
dc.identifier.citationNavarro, M.O., Parnell, P. E., & Levin, L.A. (2018). Essential market squid (Doryteuthis opalescens) embryo habitat: A baseline for anticipated ocean climate change. Journal of Shellfish Research, 37(3), 601-614. https://doi.org/10.2983/035.037.0313en_US
dc.identifier.issn0730-8000
dc.identifier.urihttp://hdl.handle.net/11122/10032
dc.description.abstractThe market squid Doryteuthis opalescens deposits embryo capsules onto the continental shelf from Baja Californiato southern Alaska, yet little is known about the environment of embryo habitat. This study provides a baseline of environmental data and insights on factors underlying site selection for embryo deposition off southern California, and defines current essential embryo habitat using (1) remotely operated vehicle–supported surveys of benthos and environmental variables, (2) SCUBA surveys, and (3) bottom measurements of T, S, pH, and O2. Here, embryo habitat is defined using embryo capsule density, capsule bed area, consistent bed footprint, and association with [O2] and pH (pCO2) on the shelf. Spatial variation in embryo capsule density and location appears dependent on environmental conditions, whereas the temporal pattern of year-round spawning is not. Embryos require [O2] greater than 160mmol and pHT greater than 7.8. Temperature does not appear to be limiting (range:9.9°C–15.5°C). Dense embryo beds were observed infrequently, whereas low-density cryptic aggregations were common. Observations of dense embryo aggregation in response to shoaling of low [O2] and pH indicate habitat compression. Essential embryo habitat likely expands and contracts in space and time directly with regional occurrence of appropriate O2 and pH exposure. Embryo habitat will likely be at future risk of compression given secular trends of deoxygenation and acidification within the Southern California Bight. Increasingly localized and dense spawning may become more common, resulting in potentially important changes in market squid ecology and management.en_US
dc.description.sponsorshipNational Oceanic and Atmospheric Administration (NOAA) Grant No. NA10OAR4170060, California Sea Grant College Program Project No. R/CC-04, Scripps Mia Tegner Scholarship, WWW Foundation in collaboration with Bryce Rhodes, Fenmore Scholarshipen_US
dc.language.isoen_USen_US
dc.publisherNational Shellfisheries Associationen_US
dc.sourceJournal of Shellfish Researchen_US
dc.subjectsquiden_US
dc.subjectessential fish habitaten_US
dc.subjectoxygenen_US
dc.subjectembryo exposureen_US
dc.subjectLoliginidaeen_US
dc.subjectDoryteuthis opalescensen_US
dc.subjectclimate changeen_US
dc.subjectENSOen_US
dc.titleEssential market squid (Doryteuthis opalescens) embryo habitat: A baseline for anticipated ocean climate change.en_US
dc.typeArticleen_US
dc.description.peerreviewYesen_US
refterms.dateFOA2020-02-18T12:03:43Z


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