Pêcheur Breton : An analysis of data relating to a Mothership Dory fishing operation in Seychelles Waters from March 1991 - June 1992
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Author
Mees, C. C.Date
1992
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Show full item recordAbstract
This report presents analyses of data for Trips 2, 3 and 4 undertaken by the mothership - dory fishing venture of Pecheur Breton. Trip 1 was described separately (Mees, 1991). A comparison of data for the 4 trips follows. Trip 2, from 22 October 1991 - 16 December 1991 targeted stocks at the SE edge of the Mahe Plateau (25 days), the banks South of the Plateau (12 days), Amirantes (5 days), Platte (1 day) and the Providence / Farquhar group (12 days). 665 dory fishing trips landed 248.86 tonnes of fish of which 85.4% were demersal species. The mean catch rate was 12.76 kg/man-hour. Trip 3, from 8 January 1992 - 12 March 1992 fished for 28 days in the Amirantes, 22 at the banks South of the Mahe Plateau, 5 on the SE edge of the Mahe Plateau and 2 days at Junon Bank. 169.7 tonnes of fish were landed during 651 dory fishing trips, and the mean catch rate was 9.14 kg/man-hour. 86.2% of the catch was demersal species. Trip 4 took place between 18 April and 5 June 1992 and was confined soley to the Providence / Farquhar group of islands. 558 dory fishing trips were recorded and landed 231.3 tonnes of fish. However, there were 5 days without an observer and the total landings were estimated to be 262.3 tonnes. The mean catch rate was 15.87 kg/man-hour, significantly higher than the other locations nearer to Mahe. Demersal species formed 92% of the catch. In total, the four trips undertaken to date by Pecheur Breton have landed 926.9 tonnes of fish of which 86.9% were demersal species. The most important species landed were Batrican (27.4% of the total), Capitaine Rouge (16.7%), Vara vara (9.1%), Job gris (8.7%), and Vielle platte (5.0%). However, species composition varied by depth and by location. As depth increased the proportion of Lethrinids (capitaine) decreased and Serranids (Vielle) increased. Lutjanids (snappers and job) remained constant but on closer examination it is seen that with increasing depth Batrican increased whilst Job Gris and Vara vara decreased. At the greatest depths Etelis spp. predominated. By location, Lutjanids predominated everywhere except Providence / Farquhar where Lethrinids were the most abundant. When fishing depth was 70m or more Batrican was the most common Lutjanid, but at lesser depths it was Job Gris, Vara vara or Bourgeois. The latter, however, was only the most common fish at one location.Pages
83Publisher or University
Seychelles Fishing AuthoritySeries : Nr
SFA Technical ReportCollections
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