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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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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)
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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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Entanglement of Antarctic fur seals Arctocephalus gazella in man made debris at Bird Island, South Georgia during the 1997 winter and 1997/98 pup-rearing season
. Only seven seals were observed entangled in the winter, a drop of 59% from 1996. Four of these records ... were from adult females, a much higher proportion than in previous years. The number of entanglements ... in the summer was the lowest recorded to date, being 52% lower than in 1996/97. The percentage of ... mainly of juvenile fur seals, with equal numbers of each sex when identified. The observed drop in ...
Meeting Document : SC-CAMLR-XVII/BG/11 : Autor(es): Delegation of the United Kingdom
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Report of biological observations carried out on board the krill fishing vessel More Sodruzhestva in April to August 1991
dominant in catches taken in April/May in the north-west of Subarea 48.2. Krill of modal sizes 31 to 32 mm ... and 35 to 36 mm made up the bulk of catches in the south-east of the subarea. No by-catch of juvenile ... fish was observed in Subarea 48.2. Krill of the following three modal groups was dominant in Subarea ... these subareas during the period 17 to 23 May 1991. Sightings of marine mammals and birds in the ...
Meeting Document : WG-KRILL-92/06 : Autor(es): V.I. Latogursky (Russia)
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Microincrement analysis in otoliths of Notothenia rossii fingerlings from the South Shetland Islands to estimate early life history timings and to validate annulus formation
distribution of fish sampled in spring 2010 showed the simultaneous presence of two different cohorts ... , belonging to biological ages 0+ and 1+ that hatched respectively in summer and winter. The growth rate of N ... : Microincrement analysis in otoliths of Notothenia rossii fingerlings from the South Shetland Islands to estimate ... phase fingerlings selected from a total sample of 364 early juveniles caught mainly in summer from 2003 ...
Meeting Document : WG-FSA-12/04 : Autor(es): E. Barrera-Oro (Argentina) and M. La Mesa (Italy)
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Dynamics of Antarctic krill in the Bransfield Strait during austral summer and autumn investigated using acoustic data from a fishing vessel
fishing vessels might help provide such insight. In the present work, the dynamics of krill with regards ... integration assuming they constituted the bulk of krill biomass. Our results indicated a major shift in mid ... daytime in May, and also a shift in the length distribution of krill. The results strongly support recent ... operated in areas of very high swarm encounter rates, and that the trawling occurred on the highest krill ...
Meeting Document : WG-EMM-17/40 : Autor(es): X. Wang, G. Skaret, O.R. Godø and X. Zhao