Changes in the overexploited demersal fish assemblages in the Northwest Atlantic: the Southern Grand Banks and the Flemish Cap
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AuthorsNogueira, A. (Adriana)
Generalized additive mixed models
Multivariate autoregressive state-space models
An ecosystem approach to fisheries (EAF) is widely recognized as desirable for fisheries management. To progress towards the implementation of an EAF, a first step is to identify which species co-occur by quantifying assemblage structure in these habitats. A second step is the selection and development of ecological indicators to evaluate and to quantify the ecological state of exploited marine ecosystems. I examined groundfish assemblage structure in relation to depth, in two exploited marine ecosytems, the Southern Grand Banks of Newfoundland and the Flemish Cap, using multivariate analysis. Then I evaluated the status of the two ecosystem using a suit of ecological indicators. Finally, I tested different trajectories at two different depths to examine the population structure of the three species of redfish using Multivariate Autoregressive State Space Models (MARSS). I also included covariates to analyze their effect on population size. I used data obtained from two multispecies ...
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