Name: Atlantic wolffish relative occurence / Occurence relative du loup atlantique

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Description: ATLANTIC WOLFFISH - Spatial distribution of the relative occurrence of Atlantic wolffish in the annual DFO groundfish research surveys conducted by the Québec (1978-2008) and Gulf (1971-2008) regions. The data are aggregated by 100 km² cells. The probability of catching an atlantic wolffish in a set and within a cell (relative occurrence) was calculated as the ratio of the number of sets in which a species was recorded and the total number of sets made. This method allows the mapping of catch and effort for numerous time series based on data from different programs in both the whole study area (research surveys and Sentinel Fisheries using bottom trawls and a random stratified design) or in specific areas within the Gulf.#Fra LOUP ATLANTIQUE - Distribution spatiale de l’occurrence relative du loup atlantique selon les relevés de recherche annuel du MPO sur les poissons de fonds menés par les régions du Québec (1978-2008) et du Golfe (1971-2008). Les données sont agrégées par cellules de 100 km².La probabilité de capture d’un loup atlantique dans un trait et dans une cellule (son occurrence relative) a été évaluée comme étant le rapport entre le nombre de traits où une espèce est présente et le nombre total de traits. Cette approche a permis de cartographier la capture et l’effort de plusieurs séries temporelles à partir des données de divers programmes et ce pour l’ensemble du Golfe (relevés de recherche et Pêches Sentinelles par chalut selon un patron aléatoire stratifié) ou dans des secteurs spécifiques du Golfe.

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Copyright Text: Dutil, J.-D., S. Proulx, S. Hurtubise, and J. Gauthier 2011. Recent findings on the life history and catches of wolffish (Anarhichas sp.) in research surveys and in the Sentinel Fisheries and Observer Program for the Estuary and Gulf of St-Lawrence. DFO Can. Sci. Advis. Sec. Res. Doc. 2010/126: x + 71 pages.

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