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• W2938845803 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 620:119-138 (2019) - DOI: https://doi.org/10.3354/meps12966 Effects of temperature on the distribution and density of capelin in the Gulf of Alaska David W. McGowan1,*, John K. Horne1, Lauren A. Rogers2 1School of Aquatic and Fishery Sciences, University of Washington, Seattle, WA 98195, USA 2Alaska Fisheries Science Center, National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA), Seattle, WA 98115, USA *Corresponding author: mcgowand@uw.edu ABSTRACT: In North Pacific marine ecosystems, Pacific capelin Mallotus catervarius are abundant and ecologically important planktivorous fish in pelagic food webs. Environmentally driven changes in their distribution and abundance can affect the availability of capelin to predators, but there is limited information that describes how changes in ocean temperature are related to fluctuations in capelin range and density. A spatiotemporal, generalized linear mixed model was used to quantify the influence of temperature-related covariates on the occurrence and density of age-1+ capelin over the continental shelf in the central and western Gulf of Alaska (GOA) during a period of warm and cold years between 2000 and 2013. Variability in capelin distribution was explained by temperature factors that vary between bathymetric zones. Capelin are predicted to concentrate in moderately stratified waters (i.e. a temperature difference of 3 to 7°C) over shallow banks (<100 m bottom depth) and within deeper troughs (≥100 m). The optimal temperature range for capelin occurrence and catch rates was 8 to 10°C; steep declines occurred in waters warmer than 10.5°C. In contrast to expected northern latitudinal shifts during warm years, capelin shifted northeastward towards the Kodiak Archipelago during the coldest study year, and interannual variation in mean densities was not related to regional mean temperatures. Our findings demonstrate a spatially complex response by capelin to temperature variability over the GOA shelf, and highlight the importance of including potential differences in oceanographic properties among bathymetric zones that may influence distributions of pelagic species. KEY WORDS: Bathymetry · Diel correction · Forage fish · Habitat · North Pacific · Spatiotemporal · Thermal stratification Full text in pdf format Supplementary material PreviousNextCite this article as: McGowan DW, Horne JK, Rogers LA (2019) Effects of temperature on the distribution and density of capelin in the Gulf of Alaska. Mar Ecol Prog Ser 620:119-138. https://doi.org/10.3354/meps12966 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 620. Online publication date: June 18, 2019 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2019 Inter-Research." @default.
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• W2938845803 date "2019-06-18" @default.
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• W2938845803 title "Effects of temperature on the distribution and density of capelin in the Gulf of Alaska" @default.
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• W2938845803 doi "https://doi.org/10.3354/meps12966" @default.
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