Distribution and abundance of skates ( Bathyraja spp.) on the Kerguelen Plateau through the lens of the toothfish fisheries
Three species of skate, Bathyraja eatonii, B. irrasa and B. murrayi, are commonly taken as incidental bycatch in Patagonian toothﬁsh (Dissostichus eleginoides) longline and trawl ﬁsheries, and the mackerel iceﬁsh (Champsocephalus gunnari) trawl ﬁshery on the Kerguelen Plateau (KP) in the southern Indian Ocean. Data from ﬁshery observations for 1997–2014 shows that the three skates were widely distributed across the Kerguelen Plateau, showing different spatial distributions, linked mainly with depth. Off Heard Island and McDonald Islands (HIMI), in the southern part of the KP, B. eatonii and B. irrasa were most abundant to the north and northwest of Heard Island, out to the edge of the Australian Exclusive Economic Zone (EEZ), and were caught down to depths of 1790 m and 2059 m respectively. The smallest species, B. murrayi, occurred mainly in the shallower waters down to 550 m, and was most abundant to the north and northeast, close to Heard Island. Around Kerguelen Islands, in the northern part of the KP, skates were most abundant between the 500 m and 1000 m contours circling and extending from the islands.
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Nowara, G.B., P. Burch, Nicolas Gasco, D.C. Welsford, T.D. Lamb, C. Chazeau, G. Duhamel, P. Pruvost, S. Wotherspoon et S.G. Candy. « Distribution And Abundance Of Skates ( Bathyraja Spp.) On The Kerguelen Plateau Through The Lens Of The Toothfish Fisheries ». Fisheries Research 186 (2017), 65-81. doi:10.1016/j.fishres.2016.07.022.