Name: Surf clam beds / Gisements de mactre de Stimpson

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Description: Exploratory fishing for Stimpson's surfclam began in 1990 in the Magdalen Islands and in 1991 on the North Shore of Quebec. Since 1993, commercial fishing activity has steadily increased and yielded up to 785 tons of Stimpson's surfclam in Quebec (2014). Stimpson's surfclam is a sessile bivalve mollusc and a strong burrower in sandy sediments in the subtidal zone. Maximum densities are found between 15-20 m on the North Shore and between 25-60 m in the Magdalen Islands. The surfclam has a long lifetime, slow growth rate and therefore, low productivity. A sedentary lifestyle, irregular recruitment and slow growth rates are factors that make this species vulnerable to stock depletion and spills. The conservation and precautionary approach of the Stimpson's Surfclam is therefore intended to protect the reproductive potential and integrity of the Quebec region's populations.The known distribution of Stimpson's surfclam is based on several sources of information: exploratory fisheries, scientific surveys and fishermen's logbooks. Commercial fishery data come from three distinct sources of information: the purchase receipt, fishermen's logbook (lat/long data) and commercial sampling by DFO. More than 25 beds are distributed along the North Shore of the Lower Estuary from Les Escoumins to Blanc-Sablon (Qc). Four beds are known and surround the Magdalen Islands.The data layer contains information on the total area each bed's polygon, the areas and names of the beds, the target sectors, and the breeding and fishing periods.#Fra La pêche exploratoire à la mactre de Stimpson a débuté en 1990 aux Îles-de-la-Madeleine, puis en 1991 sur la Côte-Nord. Depuis 1993, l'activité de pêche commerciale n'a cessé d'augmenter et a rapporté jusqu'à 785 tonnes de mactre de Stimpson au Québec (2014). La mactre de Stimpson est un mollusque bivalve sessile et un puissant fouisseur dans les sédiments sablonneux de l'infralittoral. Les densités maximales sont retrouvées entre 15-20 m de profondeur sur la Côte-Nord et entre 25-60 m aux Îles-de-la-Madeleine. La mactre a une grande longévité, une faible croissance et donc une faible productivité. La sédentarité, le recrutement irrégulier et le faible taux de croissance sont des facteurs qui rendent cette espèce vulnérable aux déplétions de stock et aux déversements. L'approche de conservation et de précaution de la mactre de Stimpson a donc pour objectif de protéger le potentiel reproducteur et l'intégrité des populations de la région du Québec.La distribution connue de la mactre de Stimpson est basée sur plusieurs sources d'informations: les pêches exploratoires, relevés scientifiques et journaux de bord des pêcheurs. Les données de la pêche commerciale proviennent de trois sources d'informations distinctes: le récépissé d'achat, le journal de bord des pêcheurs (données lat/long) et l'échantillonnage commercial effectué par le MPO.Plus de 25 gisements sont distribués tout le long de la Côte-Nord de l'estuaire maritime des Escoumins à Blanc-Sablon. Quatre gisements sont connus et entourent les Îles-de-la-Madeleine. La couche de données contient les informations sur l'aire totale des gisements, les zones et noms des gisements, les secteurs concernés et les périodes de reproduction et de pêcheries.

Service Item Id: 75ef0ebb6b4242eeb7c3c76a70ba80f4

Copyright Text: Trottier, S. et Goudreau, P. 2015. Évaluation des stocks de mactre de Stimpson (Mactromeris polynyma) des eaux côtières du Québec en 2014. Secr. Can. de. Cons. Sci. du MPO. Doc. de Rech: 72 + ix p.

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