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Title

Embedding the effect of environmental conditions on recruitment and survival of the European anchovy (Engraulis encrasicolus): a Bayesian model with dual-time resolution

AuthorsRincón, M.M. ; Catalán, Ignacio Alberto ; Mäntyniemi, Samu H. P.; Macías, Diego ; Ruiz Segura, Javier
Issue Date2018
PublisherNational Marine Fisheries Service (U.S.)
CitationFishery Bulletin 116: 34-49 (2018)
AbstractMany studies underscore the importance of incorporating the effect of environmental data within a life-history-stage–specific framework for determining the recruitment and survival of small pelagic fish. The recruitment of anchovy (Engraulis encrasicolus) in the Gulf of Cádiz (NE Atlantic) is sensitive to the effect of intense easterlies, stratification of the water column, and discharges from the Guadalquivir River on early life stages. As a proof of concept, we have developed the basis for a new Bayesian model with a dual time step resolution: monthly for juveniles and adults, and weekly for earlier life stages. This dual time step resolution resolves environmental effects on prerecruits while simulating the effect of fishing on recruits. Our estimates for juvenile abundances are validated with field data. The Bayesian framework accounts for the uncertainty, thus providing consistent length-frequency estimates and a plausible environmentally driven stock-recruitment relationship.
Publisher version (URL)https://doi.org/10.7755/FB.116.1.4
URIhttp://hdl.handle.net/10261/173762
ISSN0090-0656
E-ISSN1937-4518
ISMN10.7755/FB.116.1.4
Appears in Collections:(ICMAN) Artículos
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