Résultats de la recherche

1. Preliminary appraisal of Antarctic fish selection by the 32/36 bottom trawl combined with various codends

   Paper Title:  Preliminary appraisal of Antarctic fish selection by the 32/36 bottom trawl combined ... with various codends Abstract / Description:  Selectivity properties of single and doubler-layer twine ... codends (mesh size 120 mm) and single-layer tape codends with a mesh size of 60 and 100 mm were determined ... . It was found that the selectivity properties of twine codends are unsatisfactory in the case of ... liner was placed on the upper part of the codend, reaching down to the middle of the codend side walls ... . The codend bottom was deprived of its selective properties up to the middle of side walls by placing ... selection. In fact, they constituted the middle and final part of a typical selectivity ogive, which was ... - 1 - SC-CAMLR-V/BG/29 PRELIMINARY APPRAISAL OF ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 1-48 : Auteur(s): Zaucha, J.

2. Acoustic estimates of krill density at South Georgia during 11 austral summers between 1981 and 1998

   Abstract:  Acoustic estimates of densities of Antarctic krill, Euphausia superba, at South Georgia ... and 1994 austral summer seasons were characterised by particularly low abundances of krill. For five ... of the summers between 1990 and 1998 it was possible to calculate separate density estimates for ... north-eastern and north-western ends of South Georgia. In four of these years density was higher to the ...

   Meeting Document : WG-EMM-98/51 : Auteur(s): A.S. Brierley, J.L. Watkins, C. Goss, M.T. Wilkinson and I. Everson (UK)

3. A simple approach for calculating the potential yield of krill from biomass survey results

   Paper Title:  A simple approach for calculating the potential yield of krill from biomass survey ... for the calculations is that the probability that the krill spawning biomass drops below 20% of its ... median pre-exploitation level over a 20 year period of harvesting should equal 10%. The value of, λ ... depends strongly on the value of M (natural mortality) and σ R (recruitment variability), and also on the ... estimate Bo which is to be used in equation (1) is considered to be made in the middle of the season (Le ... .3) In the middle of the season during which the krin grow, their mass-at-age (w .) is then: wa ... POTENTIAL YIELD OF KRILL FROM BIOMASS SURVEY RESULTS D.S. Butterworth* , A.B. Punt* and M. Basson ... is that the probability that the krill spawning biomass drops below 20% of its median pre ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 207–217 : Auteur(s): Butterworth, D.S., A.E. Punt and M. Basson

4. Size at sexual maturity of Patagonian toothfish (Dissostichus eleginoides)

   Paper Title:  Size at sexual maturity of Patagonian toothfish (Dissostichus eleginoides) Abstract ... / Description:  Analyses of size at sexual maturity were undertaken on samples of Patagonian toothfish ... proportion, 25 to 43%, of sexually mature fish were not coming into spawning condition. This introduces a ... bias leading to the overestimation L m50 of  calculated by conventional methods. Further analysis ... middle of the curve. (This point was highlighted as a warning indicator by the Genstat program during ... data in the middle of the curve for the July period. The results from the PROBITANALYSIS procedure ... MATURITY OF PATAGONIAN TOOTHFISH (DISSOSTICHUS ELEGINOIDES) I. Everson and A. Murray British Antarctic ... Survey High Cross, Madingley Road Cambridge CB3 OET, United Kingdom Abstract Analyses of size at ...

   Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 37–46 : Auteur(s): Everson, I. and A.W. Murray

5. Proposed allocation of research catches in Divisions 58.4.1 and 58.4.2

   had notified to conduct research in the exploratory toothfish fisheries off East Antarctica, covered ... allocation of research catches in Divisions 58.4.1 and 58.4.2 Microsoft Word File:  fsa-15-54.docx Approval ...

   Meeting Document : WG-FSA-15/54 : Auteur(s): D.C. Welsford (Australia), R. Sarralde Vizuete (Spain) and T. Ichii (Japan)

6. Measurements of fish school velocities with an acoustic Doppler current profiler

   Abstract:  Horizontal and vertical velocities of fish schools were measured using an acoustic ... Doppler current profiler (ADCP). To determine three orthogonal velocity vectors (east, north, and vertical ... estimates and ensemble averaged to determine the average speeds and directions of fish aggregations. The ... . Some applications may include the quantification of horizontal and vertical migration patterns of large ...

   Meeting Document : WG-EMM-96/41 : Auteur(s): Demer, D.A.

7. Hook selectivity in the longline fishery of Dissostichus eleginoides (Nototheniidae) off the Chilean coast

   fisheries of the patagonian toothfish Dissostichus eleginoides related with the selectivity of the type and ... size of hooks used in the longlines. Original data obtained during 1991 on the coast of Valdivia, South ... East Pacific, are added. The data show that the circle hooks are far more efficient that the right ones ... . The size frequency of the population collected with straight hooks No3 and 4 are not significatively ...

   Meeting Document : WG-FSA-91/11 : Auteur(s): C.A. Moreno (Chile)

8. Characterisation of skate catches in the Ross Sea region

   . There was no evidence of growth retardation linked with the capture and tagging event. Tag loss rates of ... (Dissostichus mawsoni) catch of about 3000 t. Skates form a small proportion of the total catch (typically 2% or ... in the Ross Sea Region, including the data collected in the two “Year of the Skate” fishing seasons ... in 2008/09 and 2009/10. The composition of the skate catch by species is uncertain; it is estimated ...

   Meeting Document : WG-FSA-10/25 : Auteur(s): S. Mormede and A. Dunn (New Zealand)

9. Toward a System of Marine Protected Areas in the Southern Ocean

   . To continue momentum, CCAMLR Members must realize the extent of the commitment they made in 2009, and ... again in 2011 (CM 91-04) toward establishing a representative system of MPAs in the Convention Area. To ... realize this commitment, ASOC recommends that CCAMLR designate an MPA in East Antarctica this year, and in ... the Weddell Sea and the Antarctic Peninsula in 2018. Here ASOC provides an overview of these proposals ...

   Meeting Document : SC-CAMLR-XXXVI/BG/32 : Auteur(s): Submitted by ASOC

10. A case of giant squid attack on Antarctic toothfish Dissostichus mawsoni Norman, 1937 (Perciformes, Nototheniidae) caught on bottom-set longline in the Ross Sea

    Ross Sea (East Antarctic) from the depth of 1480 m to the surface a very large squid taken a large ... Abstract:  In the beginning of February 2005, during the hauling of bottom-set longline in the ... individual of Antarctic toothfish D. mawsoni (Norman, 1937) with a size of 160 cm and weight of 58 kg caught ... by a longline hook, was hauled up to the board of longliner VOLNA. Squid was very active and did not ...

    Meeting Document : WG-FSA-06/P3 : Auteur(s): Petrov, A.F.

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