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• W2921213849 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 616:171-183 (2019) - DOI: https://doi.org/10.3354/meps12930 Forecasting capelin Mallotus villosus biomass on the Newfoundland shelf Keith P. Lewis*, Alejandro D. Buren, Paul M. Regular, Frances K. Mowbray, Hannah M. Murphy Northwest Atlantic Fisheries Centre, Fisheries and Oceans Canada, Science Branch, East White Hills Road, PO Box 5667, St. John’s, NL A1C 5X1, Canada *Corresponding author: keith.lewis@dfo-mpo.gc.ca ABSTRACT: Forage fish play a central role in marine ecosystems, acting as a trophic link between plankton and larger marine species. They also contribute to global economies by directly and indirectly supporting commercial and recreational fisheries. Managing forage fish is problematic due to their high spatial-temporal variation in biomass and strong responses to environmental variability. A variety of mechanisms have been proposed to explain variation in capelin Mallotus villosus biomass, a keystone forage fish in the Northwest Atlantic, including factors influencing cohort strength such as larval abundance and larval food (i.e. Pseudocalanus spp.) availability. Alternately, pre-spawning mortality of capelin may be regulated by the timing of the retreat of sea ice (tice) via its effects on the spring bloom and the availability of food (e.g. Calanus spp.) for adult capelin, or by the condition of adult capelin the previous fall. Here, we used a Bayesian approach in a multimodel inference framework to assess support for a series of hypotheses explaining the population dynamics of capelin. The most parsimonious model included larval abundance, tice, and capelin condition in the fall, and explained 68% of the variance in capelin biomass. These results are consistent with much of the literature that suggests capelin in the Northwest Atlantic are driven by bottom-up forces. This model allows us to produce forecasts of capelin biomass 1-2 management cycles in advance, which will be a valuable contribution to the management of this forage fish species. KEY WORDS: Capelin · Fisheries management · Biomass · Cohort strength · Adult mortality · Bayesian · Multimodel inference · Northwest Atlantic Full text in pdf format PreviousNextCite this article as: Lewis KP, Buren AD, Regular PM, Mowbray FK, Murphy HM (2019) Forecasting capelin Mallotus villosus biomass on the Newfoundland shelf. Mar Ecol Prog Ser 616:171-183. https://doi.org/10.3354/meps12930 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 616. Online publication date: May 09, 2019 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2019 Inter-Research." @default.
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• W2921213849 date "2019-05-09" @default.
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• W2921213849 title "Forecasting capelin Mallotus villosus biomass on the Newfoundland shelf" @default.
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• W2921213849 doi "https://doi.org/10.3354/meps12930" @default.
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