Résultats de la recherche

1. Quantifying the escape mortality of trawl caught Antarctic krill (Euphausia superba)

   Abstract:  Antarctic krill (Euphausia superba) is an abundant fishery resource, the harvest levels ... of which are expected to increase. However, many of the length classes of krill can escape through ... commonly used commercial trawl mesh sizes. A vital component of the overall management of a fishery is to ... estimate the total fishing mortality and quantify the mortality rate of individuals that escape from ...

   Meeting Document : WG-EMM-16/04 : Auteur(s): B.A. Krafft, L.A. Krag, A. Engås, S. Nordrum, I. Bruheim and B. Herrmann

2. Preliminary biomass estimation of Antarctic krill based on the swarm-based method for CCAMLR Division 58.4.1 in 2018/19 using data obtained by Japanese survey vessel Kaiyo-maru

   preliminarily estimated as 4.349 million ton (CV=54.8 %) based on the swam based method using data obtained by ... Kaiyo-maru. The point estimate was comparable with the estimate in 1996 by BROKE (4.83 million ton with ... different, (2) timing of the surveys were different (Kaiyo-maru survey commenced about 40 days earlier than ... especially in the western part of the Division. The CV of biomass estimate of Kaiyo-maru survey was high ...

   Meeting Document : SG-ASAM-2019/02 : Auteur(s): K. Abe, R. Matsukura, N. Yamamoto, K. Amakasu and H. Murase

3. Evidence to support the annual formation of growth zones in otoliths of Antarctic toothfish (Dissostichus mawsoni)

   . However, no evidence to validate this assumption has previously been presented. In the current work ... Abstract:  Antarctic toothfish (Dissostichus mawsoni) from the Ross Sea (CCAMLR sub-area 88.1 ... ) have been aged assuming that one translucent zone is formed annually in the otoliths of this species ... before recapture. The number of zones between the fluorescent oxytetracycline line and the otolith margin ...

   Meeting Document : WG-FSA-02/33 : Auteur(s): P.L. Horn, C.P. Sutton (New Zealand) and A.L. DeVries (USA)

4. Acoustic visualization of the three-dimensional prey field of foraging chinstrap penguins

   the surface distribution of penguins and krill distributed in the 30- 40 m depth layer; no spatial ... Abstract:  Predator-prey interactions play an important role in determining the dynamics of ... ecosystems. Recently, concerns have arisen due to the commercial harvesting of Euphausia superba, the ... Antarctic krill, a keystone prey species in the Southern Ocean food web. It has been difficult to evaluate ...

   Meeting Document : WG-Joint-94/12 : Auteur(s): J.E. Zamon, C.H. Greene, E. Meir, D.A. Demer, R.P. Hewitt and S. Sexton (USA)

5. “Sailbuoy for krill” – a concept for autonomous commercial and scientific monitoring of the krill fishing in Antarctica

   distribution dynamics. Similarly, the industry burns unnecessary amounts of oil in long range searching of ... drone technology now available through the Sailbuoy concept, offers new opportunity for an industry ... availability.  The Sailbuoy concept has demonstrated robustness and reliability under other rough conditions ... fishery in the Antarctic. The system will be equipped with echosounder and environmental sensors and will ...

   Meeting Document : WG-EMM-18/15 : Auteur(s): O.R. Godø, G. Pedersen, D. Peddie, G. Skaret, A. Lowther, F. Grebstad and A. Lohrmann

6. Integrating Climate and Ecosystem Dynamics in the Southern Ocean (ICED) programme: a report on recent joint activities and links between ICED and CCAMLR

   analyses to improve understanding of Southern Ocean change, the implications for ecosystems and for ... management. Through ongoing engagement between ICED, CCAMLR scientists and the CCAMLR Secretariat, there is ... increasing mutual understanding of the key areas of ICED science and associated activities that are also of ... interest to CCAMLR. The 2018 ICED Projections Workshop, undertaken in collaboration with CCAMLR, provided ...

   Meeting Document : WG-EMM-2019/02 : Auteur(s): R.D. Cavanagh, N.M. Johnston and E.J. Murphy

7. Preliminary results from the International Synoptic Krill Survey in Area 48, 2019

   Abstract:  Preliminary results from the International Synoptic Krill Survey in Area 48, 2019, are ... presented. Of the six vessels that participated in the survey, this report provides methods and preliminary ... results from four (vessels from the Association of Responsible Krill harvesting companies (ARK), Norway ... , Ukraine, and the United Kingdom), covering 8719 n. miles of acoustic transects and occupying 149 sampling ...

   Meeting Document : WG-EMM-2019/47 : Auteur(s): G. Macaulay, G. Skaret, T. Knutsen, O.A. Bergstad, B. Krafft, S. Fielding, S.G. Choi, S. Chung, K. Demianenko, V. Podhornyi, K. Vishnyakova, L. Pshenichnov, A. Chuklin, A. Shishman and M.J. Cox

8. Sharks by-catch observed on bottom longlines fishery off the Kerguelen Islands in 2006–2016, with a focus on Etmopterus viator

   bycatch within the Kerguelen EEZ (northern part of the plateau). From 2006 to 2016, crew reported the ... total catches of the line and observers were asked to identify and count fish bycatch on 25% of the ... distributions of the shark bycatch species and their relative abundance. Length-frequency for E. viator showed a ... bimodal distribution characterizing a long-lived species and stopping growth of adults. The study also ...

   Meeting Document : WG-FSA-18/25 : Auteur(s): C. Chazeau, S.P. Iglésias, N. Gasco, A. Martin and G. Duhamel

9. A TALE OF TWO ISLANDS: CONTRASTING FORTUNES FOR SUBANTARCTIC SKUAS AT THE PRINCE EDWARD ISLANDS

   , continuing an apparent decrease in this species at Marion Island since the 1980s. There is no evidence that ... -Antarctic islands, and can be used to monitor the health of burrowing petrel populations. A survey of skuas ... at the Prince Edward Islands was conducted during December 2008, repeating a previous survey in ... km2) had a feral population of cats from the 1950s to 1980s, and still supports a large population of ...

   Meeting Document : WG-EMM-10/P3 : Auteur(s): P.G. Ryan, P.A. Whittington and R.J.M. Crawford

10. Second progress report of the CEMP Special Fund overwinter penguin tracking project

    Abstract:  We provide a 2 nd update on the progress of our project “Tracking the overwinter ... habitat use of krill-dependent predators from Subarea 48.1”. The project was initiated with support from ... the CEMP Special Fund in 2015/16. Of 150 tags purchased in 2016, all have been deployed and the data ... collection phase has recently concluded. As of 28 May 2018, the last viable tags had ceased transmitting and ...

    Meeting Document : WG-EMM-18/24 : Auteur(s): J. Hinke, G. Watters, M. Santos, M. Korczak-Abshire and G. Milinevsky

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