Resultados de la búsqueda
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Seabird by-catch in the Patagonian toothfish longline fishery at the Prince Edward Islands: 1998–1999
% more than the number of hooks set in 1997-98, but only 79 seabirds (150/0 of the total killed in 1997 ... the same vessel, using the same gear design and at the same time of year, show marked decreases in ... Petrels P. cinerea (6%). A worrying development is the increase in numbers of Grey Petrels killed (only ... primarily linked to daytime sets, with most birds caught in the late afternoon or shortly after dusk. Use of ...
Meeting Document : WG-FSA-99/42 Rev. 1 : Autor(es): P.G. Ryan and B.P. Watkins (South Africa)
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Seabird mortality in the longline fishery for Patagonian toothfish at the Prince Edward Islands: 1996–1997
. Given the low reproductive rate of these species, these levels of mortality (exacerbated by mortality in ... the impact of uncontrolled fishing renders the last option impractical in the short term. It is ... . This paper summarizes the mortality of seabirds associated with this fishery during the year July 1996 ... fishing trips. Some 3.2 million hooks were observed during the period November-June, representing 84 % of ...
Meeting Document : WG-FSA-97/51 : Autor(es): Boix-Hinzen, C., Enticott, J.W., Ryan, P.G., Wanless, R., Purves, M., Nel, D.C.
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Seabird mortality in the Patagonian toothfish longline fishery around the Prince Edward Islands, 1996–2000
(a globally important seabird breeding site) commenced in 1996 following high levels of Illegal ... trips between 1996 and 2000, allowing a thorough excellent understanding of the impact of this fishery ... in their bills. Albatross carcasses also contained large numbers of baits, indicating that fishers ... seabird bycatch in the sanctioned fishery decreased from 0.19 birds/1000 hooks to 0.034 birds/1000 hooks ...
Meeting Document : WG-FSA-01/8 : Autor(es): D.C. Nel, P.G. Ryan and B.P. Watkins (South Africa)
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Assessment models for Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea including data from the 2005/06 season
those presented in 2005. The inclusion of the 2005 tag-release and the 2006 tag-recapture data had a ... Abstract: We provide an update of the Bayesian sex and age structured population stock assessment ... model for Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea (Subareas 88.1 and SSRUs 88.2A–B ... reference case resulted in a much higher estimate of initial biomass, though this appeared to be almost ...
Meeting Document : WG-FSA-06/60 : Autor(es): A. Dunn and S.M Hanchet (New Zealand)
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Seabird by-catch in the Patagonian toothfish longline fishery at the Prince Edward Islands: 1999–2000
sanctioned fishing trips. Fishing effort was 7.4 million hooks, a 45% increase on the number of hooks set in ... that reported in either 1996/97 or 1997/98. The absolute number of birds killed increased more than ... previous years, much of the variance could be explained in terms of fishing season (higher bycatch rate in ... Abstract: This paper summarises seabird bycatch during the fourth year (July 1999-June 2000) of ...
Meeting Document : WG-FSA-00/30 : Autor(es): P. Ryan and B. Watkins (South Africa)
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How much do icefish (Notothenioidei, Channichthyidae) eat in the southern Scotia Arc and the Antarctic Peninsula region?
of the Antarctic Peninsula. Variability of food consumption was comparatively low between years in ... daily food intake of demersal Antarctic fish both available in the scientific literature and from our ... about 48 hours while the digestion of fish prey takes likely in excess of 96 hours, our data are well in ... , Cryodraco antarcticus, and Chaenodraco wilsoni) ice fish species were estimated around islands of the ...
Meeting Document : WG-FSA-10/18 : Autor(es): K.-H. Kock (Germany), C.D. Jones (USA), J. Gröger and S. Schöling (Germany)
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2006–2013 fish distribution and biomass in the Kerguelen EEZ (CCAMLR DIVISION 58-5-1) for the bathymetric range 100–1 000 m
Abstract: Three fish biomass surveys have been recently undertaken in the northern part of the ... 40% of the total biomass on the shelf and surrounding deep-sea, is the dominant species in terms of ... first ones taking into account all the fish components of a surveyed area in the Southern Ocean ... ” repeating the same random and stratified sampling stations in the bathymetric range 100 – 1000 m. Data on ...
Meeting Document : WG-FSA-14/07 : Autor(es): G. Duhamel, M. Hautecœur and R. Sinegre (France)
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Preliminary analysis on the Kerguelen shelf icefish Champsocephalus gunnari stock from 1996/97 to 2001/02: no evidence in the recovery!
cruises in the traditionnal area of fish aggregations. Such cruises occur regularly with two trawlers from ... 1996/97 to 2001/2002, the last season of trawling in the Kerguelen EZ. Preliminary results do not show ... an increasing of the icefish’s abundance in the surveyed area and biomass seems very low. It is a ... recruitement or emmigration in relation to the ENSO 1998 effect in the vicinity of the islands, increasing of ...
Meeting Document : WG-FSA-02/65 : Autor(es): G. Duhamel and J. Claudet (France)
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Longliners, black-browed albatross mortality and bait scavenging in the Falkland Islands: what is the relationship?
Abstract: The rate of foraging attempts by black–browed albatross on baited hooks during Spanish ... , examined over a relatively short time period with minimal environmental variation, the rate of black-browed ... suggest that caution should be exercised using the rate of black-browed albatross foraging attempts as an ... , black-browed albatross mortality and bait scavenging in the Falkland Islands: what is the relationship ...
Meeting Document : WG-FSA-03/92 : Autor(es): T.A. Reid and B.J. Sullivan (United Kingdom)
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Assessment models for Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea including data from the 2006/07 season
model resulted in a slightly lower estimate of initial biomass than the 2006 base case. The inclusion of ... suggested little evidence of non-convergence in the key biomass parameters. MCMC estimates of initial ... Abstract: We provide an update of the Bayesian sex and age structured population stock assessment ... model for Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea (Subareas 88.1 and SSRUs 88.2A–B ...
Meeting Document : WG-FSA-07/37 : Autor(es): A. Dunn and S.M. Hanchet (New Zealand)