Distribution and abundance of skates ( Bathyraja spp.) on the Kerguelen Plateau through the lens of the toothfish fisheries

Author
G.B. Nowara
P. Burch
Nicolas Gasco
D.C. Welsford
T.D. Lamb
C. Chazeau
G. Duhamel
P. Pruvost
S. Wotherspoon
S.G. Candy
Résumé
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.
Année de publication
2017
Journal
Fisheries Research
Volume
186
Nombre de pages
65-81
Date de publication
feb
Numéro ISSN
01657836
URL
https://linkinghub.elsevier.com/retrieve/pii/S016578361630234X
DOI
10.1016/j.fishres.2016.07.022
Article
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.