Résultats de la recherche
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Progress towards a trophic model of the ecosystem of the Ross Sea, Antarctica, for investigating effects of the Antarctic toothfish fishery
Ross Sea is a low primary production system, with production being localised in space and time. In the ... considered a work in progress. Overall, the model is close to balance, with total exports of organic carbon ... balanced, due in part to limited information on diet fractions of Ross Sea organisms. Methods to adjust ... considerable predation pressure on some species of demersal fish. The significance of toothfish in the diets of ...
Meeting Document : WG-EMM-06/14 : Auteur(s): M. Pinkerton, S. Hanchet and J. Bradford-Grieve (New Zealand)
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A review of methodologies aimed at avoiding and/or mitigating incidental catch of protected seabirds.
fisheries interactions have been released in a variety of local, national and international media. Recent ... published reviews in the field of bycatch mitigation have typically had a species or fishing method focus ... interactions with fishing gear in New Zealand fisheries and fisheries that operate using similar methodologies ... for the fisheries management made, and areas for further research in New Zealand identified. Factors ...
Meeting Document : WG-FSA-05/P8 : Auteur(s): Bull, L.
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Developing integrated assessments for Dissostichus eleginoides based on the CCAMLR precautionary approach
Abstract: This paper describes a possible method for implementing the precautionary approach in ... Dissostichus eleginoides in Division 58.5.2. CASAL and GYM are key elements in the implementation described in ... this paper but the methodology is laid out in such a way that alternative software solutions could be ... used in either or both of their places. The framework for this procedure has four main components. The ...
Meeting Document : WG-FSA-SAM-05/16 : Auteur(s): I. Ball and A.J. Constable (Australia)
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Report to CCAMLR-XXIX on the implementation of the Agreement on the Conservation of Albatrosses and Petrels
revealed that the most effective measures to reduce incidental take of seabirds in pelagic longline ... ;- setting at night; and- actively deterring birds from baited hooks by means of bird scaring lines, in ... combination with appropriate line weighting. The SBWG also reviewed progress in bycatch mitigation research ... take of seabirds in trawl fisheries is the effective management of offal discharge and fish discards ...
Meeting Document : CCAMLR-XXIX/BG/18 : Auteur(s): ACAP Secretariat
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Dispositif d'effarouchement des oiseaux à utiliser dans les pêcheries palangrières de la CCAMLR
seabirds in the course of longline fishing or longline fishing research in the Convention Area' ... ' in Statistical Subareas 48.3, 58.6 and 58.7 and Statistical Divisions 58.5.1 and 58.5.2. In 2009 ... have been shown to achieve the operational characteristics in paragraph 1 of the annex. This recognises ... factors may be important. A BED configuration that demonstrates the two characteristics is shown in the ...
Page : Site Section: Fisheries
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UAV for monitoring environmental changes on King George Island (South Shetland Islands) Antarctica: preliminary study on wildlife disturbance
Abstract: The importance of Unmanned Aerial Vehicles (UAVs) in remote sensing is rapidly growing ... . However, knowledge about their potential impact on wildlife is scant, especially in the Antarctic, where ... they are a new tool used in ecological research and monitoring. In this preliminary study we ... investigate potential effects of wildlife disturbance by UAVs. In austral summer 2014-2015 UAV overflights ...
Meeting Document : WG-EMM-15/50 : Auteur(s): A. Kidawa, M. Korczak-Abshire, A. Zmarz, R. Storvold, M. Rodzewicz, K. Chwedorzewska, S-R. Karlsen and A. Znój (Poland)
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Performance metrics to index the spatial coverage of mark-recapture data
interpreting the biomass estimated from mark recapture data. In 2015, the Scientific Committee identified that ... measures of spatial overlap and potential bias in the development of tag-based biomass estimates are an ... measure of the potential bias in the biomass estimate calculated from non-homogenous spatial mark ... area, SSRUs 88.2H to illustrate its use. We found that the median tag spatial overlap statistic in 2012 ...
Meeting Document : WG-SAM-16/13 : Auteur(s): C. Marsh, A. Dunn and S. Mormede
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An update on the ageing of Antarctic toothfish, Dissostichus mawsoni, from East Antarctica and the Amundsen Sea
and the other by thin sectioning, in order to assess the comparability of age estimates derived from ... vessel in Subarea 88.2 in the 2014-2015 season and in Division 58.4.1 in the 2015-2016 season, were aged ... available for use in the estimation of biological parameters and stock assessments of the respective ... sampling areas in East Antarctica and the Amundsen Sea. Author(s): G. Nowara, B. Farmer, T. Barnes, P ...
Meeting Document : WG-FSA-17/15 : Auteur(s): G. Nowara, B. Farmer, T. Barnes, P. Ziegler and D. Welsford
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A TALE OF TWO ISLANDS: CONTRASTING FORTUNES FOR SUBANTARCTIC SKUAS AT THE PRINCE EDWARD ISLANDS
at the Prince Edward Islands was conducted during December 2008, repeating a previous survey in ... twice as many non-breeding birds. Burrowing petrels comprised 96% of prey in skua middens at Prince ... in 2008, whereas the number of skua nests on Marion Island was barely half that counted in 2001 ... , continuing an apparent decrease in this species at Marion Island since the 1980s. There is no evidence that ...
Meeting Document : WG-EMM-10/P3 : Auteur(s): P.G. Ryan, P.A. Whittington and R.J.M. Crawford
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The diet of toothfish species Dissostichus eleginoides Smitt and D. mawsoni Norman with overlapping distributions around the South Sandwich Islands, Southern Ocean
. eleginoides) was examined around the south sandwich islands in the southern ocean, one of few regions with ... overlapping populations of the two species. Despite large differences in the proportion of stomachs containing ... compete for prey in regions where both are distributed. However, the large increase in rate of prey ... occurrence and size of prey in D. mawsoni stomachs relative to D. eleginoides suggests species differences in ...
Meeting Document : WG-FSA-11/P03 : Auteur(s): J. Roberts, J. Xavier and D. J. Agnew