Résultats de la recherche
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An evaluation of reduced target strength estimates reported for krill (Euphausia superba)
derived from them. Their results can be shown to have significant weaknesses in both data used and ... assumptions made in calculating target strength. Whether the results of these papers are valid is critically ... in the Antarctic. The weaknesses in their data stem from the methods used to calculate target ... strength from the data and fall into three categories: 1) Errors in measurements and assumptions; 2 ...
Meeting Document : WG-KRILL-90/13 : Auteur(s): M.C. Macaulay (USA)
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Hydroacoustic surveys of the distribution and abundance of krill: Prydz Bay region – FIBEX, ADBEX II and SIBEX II
Dana, were undertaken in the Prydz Bay region, Antarctica. Three surveys were carried out south of 60°S ... of error in the echointegration technique are presented. Quantitative data are presented on the ... abundance (biomass) of krill in the Prydz Bay region as a whole and the weight density of krill along each ... cruise track is presented in graphical form. These data demonstrate a patchy density distribution with ...
Meeting Document : SC-CAMLR-VII/BG/40 : Auteur(s): Delegation of Australia
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Report on bottom fisheries and vulnerable marine ecosystems: draft template and workplan
Vulnerable Marine Ecosystems to WG-EMM and WG-FSA in 2010. This paper provides a draft template, including ... the workplan and discussion. It has been compiled by the Subgroup for consideration at WG-EMM in 2010 ... of VMEs, resulting in the following structure to replicate that approach: (i) Details of Bottom ... Scientific Committee and its working groups have been embedded within this structure in order to give them a ...
Meeting Document : WG-EMM-10/15 : Auteur(s): WG-FSA Subgroup on VMEs
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Towards the development of an assessment of stock abundance for Subarea 88.2 SSRUs 88.2C–G – a discussion paper
and length frequency data. Although more than 700 tagged fish have been released in this region, only ... 2 fish have been recaptured. It is likely that the lack of tag recaptures in this region has been ... drawing on the success of tagging programmes in other CCAMLR fisheries, we develop an approach for ... main grounds previously fished in SSRUs 88.2C–G. An upper catch limit could be set for each of these ...
Meeting Document : WG-SAM-14/28 : Auteur(s): S.M. Hanchet and S.J. Parker (New Zealand)
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Spatio–temporal dynamics of Antarctic krill fishery: identification of fishing hotspots
Abstract: Antarctic krill is a key species in the Southern Ocean food web and is also the target ... of the greatest fishery in Antarctic waters. Management of the fishery is based on a precautionary ... subarea. Despite that the fishery is operating in the Antarctic Peninsula area since 1980s, the spatial ... and temporal pattern of the fishery is only described in meso to macro scales (>>10 4 km 2 ...
Meeting Document : WG-EMM-16/52 : Auteur(s): F. Santa Cruz, B. Ernst and J.A. Arata
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Feedback management through effort regulation
Abstract: The interim distribution of the trigger level in the fishery for Antarctic krill (CM 51 ... -01) will be revised in 2016. The trigger level is not related to the status of the krill stock and ... the predators that depend on it. Progressing the development of an operational FBM system in ... proposals tabled to CCAMLR, all of which require refinements. In particular, clarity about the data required ...
Meeting Document : SC-CAMLR-XXXV/BG/29 Rev. 1 : Auteur(s): Delegation of Norway
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Adélie penguin diet: a pilot study directly comparing data from stomach flushing with faecal DNA analysis
CCAMLR Ecosystem Monitoring Program (CEMP). Stomach lavage techniques are used in order to identify prey ... composition and mass. Analysing prey DNA in faeces may be a useful, less invasive, approach to complement ... /January) in 2014/15 and 2015/16. Each method produced a similar pattern of penguin diet, with a shift from ... almost exclusively krill in 2014/15 to a mixture of fish and krill in 2015/16. Stomach flushing allows ...
Meeting Document : WG-EMM-18/29 : Auteur(s): B. Deagle, J. McInnes, L. Emmerson, M. Dunn, S. Adlard and C. Waluda
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Power analyses of CEMP indices for penguins at Admiralty Bay and fur seals at Cape Shirreff and Seal Island
values of transformed CEMP indices to breeding year are equal to zero when, in fact, these trends ... probability of rejecting the null hypotheses when they were, in fact, true), three periods of monitoring, and ... 21 levels of annual percent change in the CEMP indices. We conducted a number of “combined analyses ... ” in which observations for different species, sexes, colonies/rookeries, and periods during the ...
Meeting Document : WG-EMM-03/52 : Auteur(s): G.M. Watters, R.P. Hewitt, W.Z. Trivelpiece and M.E. Goebel (USA)
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Estimating the biodiversity of the sub-Antarctic Indian part for ecoregionalisation: Part I. Pelagic realm of CCAMLR areas 58.5.1 and 58.6
species (plankton and fish), and the second on top predators. In this report, we followed three types of ... the TFZ in the Kerguelen shelf area than it is in the Crozet area. The Agulhas Return Current zone ... in communities and regions is very sharp at the PFZ and the TFZ. The main biogeographical barriers in ... for fish larvae were related to currents and retention zones. In this report, we showed the existing ...
Meeting Document : WS-MPA-11/10 : Auteur(s): P. Koubbi (France), P.A. Hulley (South Africa), B. Raymond (Australia), F. Penot, S. Gasparini, J.P. Labat, P. Pruvost (France), S. Mormède (New Zealand), J.O. Irisson, G. Duhamel and P. Mayzaud (France)
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Tagging larger toothfish, methods and equipment
Abstract: The current stock assessment in the Ross Sea (statistical Subareas 88.1 and 88.2) is ... of toothfish in this area is a mandatory requirement (Conservation Measure 41-01 Annex C). The Annex ... requires vessel to “target toothfish of all sizes in order to meet the tagging requirement”. This document ... Sanford Limited a major New Zealand fishing company in order to satisfy this requirement. These techniques ...
Meeting Document : WG-FSA-07/36 : Auteur(s): J.M. Fenaughty (New Zealand)