Resultados de la búsqueda
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Entanglement of Antarctic fur seals (Arctocephalus gazella) in man-made debris at Bird Island, South Georgia, during the 2004 winter and 2004/05 breeding season
Abstract: The number of entanglements in the fifteenth consecutive winter surveyed, decreased by ... 64% from last year. For the first time since records started in 1990, none of the injuries were ... % compared to last year; the lowest number of entanglements recorded since 1989. As in previous years, most ... individuals observed entangled in debris were juveniles (80% of winter and 50% of summer observations). Of the ...
Meeting Document : SC-CAMLR-XXIV/BG/16 : Autor(es): Delegation of the United Kingdom
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Proposal for a CCAMLR sponsored research survey to monitor abundance of pre-recruit Antarctic toothfish in the southern Ross Sea
Subarea 88.1 and for nine years in Subarea 88.2. Associated research has led to an assessment of the ... fisheries potential yield, but a source of ongoing uncertainty in the stock assessment concerns recruitment ... research survey in response to the Scientific Committee request. We consider here the objectives of the ... location, the number of sets in each stratum required to achieve target c.v.s, and associated sampling ...
Meeting Document : WG-SAM-11/16 : Autor(es): S.M. Hanchet, S. Mormede, S.J. Parker and A. Dunn (New Zealand)
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A REVIEW OF THE METHODS USED TO RELEASE SKATES (RAJIIDS), WITH OR WITHOUT TAGS, IN ANTARCTIC EXPLORATORY FISHERIES
implemented was that some form of in-water release would be the ideal to improve survival chances ... a timely fashion in a manner most likely to ensure survival. The advantages of this method have been ... the more effective scanning of the captured skate for existing tags, greater accuracy in the ... seasons in preparation for the ‘Year of the Skate’ prior to a final decision on skate release protocols. A ...
Meeting Document : WG-FSA-08/30 : Autor(es): J.M. Fenaughty (New Zealand)
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Managing ecosystem uncertainty: critical habitat and dietary overlap of top-predators in the Ross Sea
managers of the close spatial and temporal ecological overlaps among top predators in the Ross Sea Shelf ... well within range. In the RSShE, the main prey species eaten by most of the listed predators is the ... Antarctic silverfish, which is a major predator of ice krill. Based on frequency of occurrence in the diet ... . Title: Managing ecosystem uncertainty: critical habitat and dietary overlap of top-predators in the ...
Meeting Document : WG-EMM-06/29 : Autor(es): Testa, J.W., Stewart, B.S., Olmastroni, S., Lyver, P., Karl, B., Eastman, J., Barton, K., Ballard, G., Toniolo, V., Wilson, P., Ainley, D.
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Entanglement of Antarctic fur seals Arctocephalus gazella in man-made debris at Bird Island, South Georgia during the 1993 winter and 1993/94 pup-rearing season
in 1990 and 1991. Nearly all animals were juveniles, half with severe injuries and the proportion of ... females (40%) was the highest yet reported. The proportion of animals entangled in packaging bands was the ... bags were important as entangling materials. In the 1993/94 summer the number of seals entangled (23 ... %), the decrease in the latter mirroring the records of the preceding winter. However, 68% of animals ...
Meeting Document : SC-CAMLR-XIII/BG/03 : Autor(es): Delegation of United Kingdom
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Penguin foraging behavior in relation to the distribution of prey
of their primary prey, krill (Euphausia superba) in the vicinity of Seal Island, South Shetland ... migration pattern, being dispersed in the upper portion of the water column at night and more concentrated ... dives did not exceed the maximum depth distribution of krill. These patterns in diving behavior may ... determined by the intensity of predation pressure by predators which feed in the upper portion of the water ...
Meeting Document : WG-KRILL-93/47 : Autor(es): D.A. Croll, R.P. Hewitt, D.A. Demer and J.K. Jansen (USA)
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Revised assessment models for Patagonian toothfish in research block C of Division 58.4.4, Ob & Lena Banks for the years 1989/1990 to 2012/13
eleginoides in research block C in Division 58.4.4 b on the assumption of constant year class strength and no ... proportion of maturity index with stage 2+ and incorporated in the models. The median MPD estimates of the ... tonnes) in Len model. The median MCMC estimates of the initial B 0 and B 2013 were highest (840 and 790 ... models for Patagonian toothfish in research block C of Division 58.4.4, Ob & Lena Banks for the years ...
Meeting Document : WG-SAM-14/15 : Autor(es): K. Taki (Japan)
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Research plan for the 2015/16 exploratory longline fishery of Dissostichus spp. in Division 58.4.3a
by all effective vessels were analyzed for the improvement of stock assessment in the research blocks ... Abstract: The current season (2014/15) is the final one of the first three-season research which ... began in 2013 in data-poor fisheries. In the present report, catch, effort and biological data recorded ... . Based on the result, the next three-season (2016-18) research plan in Division 58.4.3a is also presented ...
Meeting Document : WG-SAM-15/03 : Autor(es): Delegation of Japan
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Report on a random stratified trawl survey to estimate distribution and abundance of Dissostichus eleginoides and Champsocephalus gunnari conducted in the Heard Island region (Division 58.5.2), May–June 2007
Abstract: Since the commencement of commercial fishing in Australian waters on the Heard Island ... plateau in 1997 an annual random stratified trawl survey (RSTS) has been conducted to assess the stocks of ... on the Heard Island Plateau. The survey had the same design as the 2006 RSTS survey in the number of ... stations chosen for sampling in each stratum. This paper describes the conduct of the survey on the FV ...
Meeting Document : WG-FSA-07/46 : Autor(es): G.B. Nowara and T. Lamb (Australia)
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Preliminary assessment of Dissostichus eleginoides on the Heard Island Plateau (Division 58.5.2) based on a survey in April–May 2003
term yields. Further work is required to evaluate the implications of current uncertainty in the rate ... design of the annual survey indicated some variability in survey catchability between years and suggest ... 2003 season saw the operation of the first commercial long line vessel in 58.5.2. An initial comparison ... result of a randomly stratified trawl survey completed between 16 April and 10 May 2003. The 2003 ...
Meeting Document : WG-FSA-03/33 : Autor(es): A.J. Constable, C.R. Davies, R. Williams and T. Lamb (Australia)