The summer assemblage of large pelagic Crustacea in the Gully submarine canyon: Major patterns

摘要: Abstract We describe the trawl-vulnerable crustacean micronekton and macrozooplankton of Gully, a large, shelf-incising submarine canyon off Nova Scotia, Canada, Marine Protected Area. Over 68 species pelagic crustacea were collected with an International Young Gadoid Pelagic Trawl during three annual summer surveys at one fixed station in canyon. Depths sampled ranged from surface to upper bathypelagic zone, concentrated 1250 m, maximum depth 1500 m. The fauna was dominated by cold temperate typical mid- higher-latitudes North Atlantic. Meganyctiphanes norvegica Eusergestes arcticus particularly dominant terms both observed biomass abundance above 750 m depth. At least 17 new records for Canadian waters. assemblage varied primarily diel cycle, only members showing pronounced inter-annual variations catch being M. Themisto gaudichaudii , relatively shallow living species.