Arctic Krill (T. raschii) maximum annual density

Arctic Krill (T. raschii) maximum annual density The St. Lawrence Estuary is known as a summer foraging area for several species of marine mammals, including several species of rorquals. Among these is the blue whale, which feeds almost exclusively on euphausiids. Therefore, the abundance, distribution and local density of krill should logically be a strong explanatory variable for the distribution of blue whales. However little is known about the spatial association of blue whales with the aggregation dynamics of krill in eastern Canada. Six years of acoustic surveys, conducted in August from 2009 to 2014, were undertaken to study the medium- and small-scale distribution of krill within the northwestern Gulf of St. Lawrence and estuary. The data shows a mosaic of the maximum annual density of arctic krill (T. raschii) made from these surveys. McQuinn, I.H., Gosselin, J.-F., Bourassa, M.-N., Mosnier, A., St-Pierre, J.-F., Plourde, S., Lesage, V., Raymond, A. 2016. The spatial association of blue whales (Balaenoptera musculus) with krill patches (Thysanoessa spp. and Meganyctiphanes norvegica) in the estuary and northwestern Gulf of St. Lawrence. DFO Can. Sci. Advis. Sec. Res. Doc. 2016/104. iv + 19 p. 2024-08-01 Fisheries and Oceans Canada gddaiss-dmsaisb@dfo-mpo.gc.ca Nature and EnvironmentScience and TechnologySt. Lawrence EstuaryKrillAquatic animalsAquatic ecosystems TRaschii 2009-2014TIFF https://api-proxy.edh.azure.cloud.dfo-mpo.gc.ca/catalogue/records/7161e5c6-f2d3-44cd-965f-9b21aec0bc3a/attachments/TRaschii%202009-2014.zip Arctic Krill (T. raschii) maximum annual densityESRI REST https://gisp.dfo-mpo.gc.ca/arcgis/rest/services/FGP/St_Lawrence_TRaschii/MapServer Arctic Krill (T. raschii) maximum annual densityESRI REST https://gisp.dfo-mpo.gc.ca/arcgis/rest/services/FGP/St_Lawrence_TRaschii/MapServer

The St. Lawrence Estuary is known as a summer foraging area for several species of marine mammals, including several species of rorquals. Among these is the blue whale, which feeds almost exclusively on euphausiids. Therefore, the abundance, distribution and local density of krill should logically be a strong explanatory variable for the distribution of blue whales. However little is known about the spatial association of blue whales with the aggregation dynamics of krill in eastern Canada. Six years of acoustic surveys, conducted in August from 2009 to 2014, were undertaken to study the medium- and small-scale distribution of krill within the northwestern Gulf of St. Lawrence and estuary. The data shows a mosaic of the maximum annual density of arctic krill (T. raschii) made from these surveys.

McQuinn, I.H., Gosselin, J.-F., Bourassa, M.-N., Mosnier, A., St-Pierre, J.-F., Plourde, S., Lesage, V., Raymond, A. 2016. The spatial association of blue whales (Balaenoptera musculus) with krill patches (Thysanoessa spp. and Meganyctiphanes norvegica) in the estuary and northwestern Gulf of St. Lawrence. DFO Can. Sci. Advis. Sec. Res. Doc. 2016/104. iv + 19 p.

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Electronic Mail Address: gddaiss-dmsaisb@dfo-mpo.gc.ca

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