Functional group based marine ecosystem assessment for the Bay of Biscay via elasticity analysis.

ABSTRACT: The transitory and long-term elasticities of the Bay of Biscay ecosystem to density-independent and density-dependent influences were estimated within a state space model that accounted for both process and observation uncertainties. A functional group based model for the Bay of Biscay fish ecosystem was fit to time series obtained from scientific survey and commercial catch and effort data. The observation model parameters correspond to the unknown catchabilities and observation error variances that vary across the commercial fisheries and fishery-independent scientific surveys. The process model used a Gompertz form of density dependence, which is commonly used for the analysis of multivariate ecological time series, with unknown time-varying fishing mortalities. Elasticity analysis show

SUBMITTER: Hosack GR 

PROVIDER: S-EPMC6690336 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature