Search results
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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 : Author(s): X. Wang, G. Skaret, O.R. Godø and X. Zhao
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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 : Author(s): E. Barrera-Oro (Argentina) and M. La Mesa (Italy)
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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 : Author(s): S.M. Hanchet, S. Mormede, S.J. Parker and A. Dunn (New Zealand)
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Research plan for the 2016/17 exploratory longline fishery of Dissostichus spp. in Subarea 48.6 by South Africa and Japan
estimate the biomasses of D. mawsoni because the recaptures were concentrated in the southern area. In ... consistent with the observed numbers for D. mawsoni in the southern area of block 48.6_2, and blocks 48.6_3 ... . We estimated predicted numbers of recaptures in the next three years using present catch limit and ... northeastward extension of the current research block 48.6_2 in order to elucidate the stock structure. Details ...
Meeting Document : WG-SAM-16/07 : Author(s): Delegations of Japan and South Africa
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Discharge of offal in the Ross Sea – follow up to COMM CIRC 15/15–SC CIRC 15/06
an analysis of the information provided by New Zealand in previous years (COMM CIRC 13/09), along ... facilitate further investigation. In 2013 reports of offal were tightly clustered in a small area on the ... border of SSRUs 88.H and J, whereas in 2015 the reports were received from a broader area. For each ... . Identifying the provenance of offal found in the stomachs of toothfish is inconclusive in many cases, however ...
Meeting Document : CCAMLR-XXXIV/BG/10 : Author(s): CCAMLR Secretariat
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Trophic interactions and population trends of killer whales (Orcinus orca) in the southern Ross Sea
coincident with a decrease in the number and size of an important prey: Antarctic toothfish (Dissostichus ... contrast, the prevalence of the larger, mammal-eating Type-B killer whales has not changed in the southern ... small penguins, such as Adélies (Pygoscelis adeliae), are presented. In the case of both killer whale ... forms, the progressive seasonal breakup of fast ice in large bays bordering the Ross Sea likely provides ...
Meeting Document : WG-FSA-12/P03 : Author(s): D.G. Ainley and G. Ballard
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Preliminary assessment of mackerel icefish, Champsocephalus gunnari, on the Heard Island Plateau (Division 58.5.2) based on a survey in April–May 2003
approximately 20% of the 2002 estimate. This decline in abundance is consistent with the passage of the strong ... evident in the survey were not fully sampled and as such are not included in the assessment. Estimates of ... in recruitment, natural mortality and growth of these fish, combined with the need to maintain a ... steady yield if possible need to be explored further in the development of a management procedure that ...
Meeting Document : WG-FSA-03/32 : Author(s): A.J. Constable, C.R. Davies, R. Williams and T. Lamb (Australia)
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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 : Author(s): J.M. Fenaughty (New Zealand)
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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 : Author(s): 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 1994 winter and 1994/95 pup-rearing season
juveniles. Of entangled animals the proportion of males affected was 67%, approximately the same as in 1993 ... and 1991, but two-thirds of the value recorded in 1990 and 1992. The proportion of entangled animals ... 1994 winter. In the 1994/95 summer the number of entangled seals (20) was also the lowest yet recorded ... Abstract: Surveys of Antarctic fur seals entangled in man-made marine debris were carried out for ...
Meeting Document : SC-CAMLR-XIV/BG/08 : Author(s): Delegation of the United Kingdom