Résultats de la recherche
-
Status of white-chinned petrels Procellaria aequinoctialis Linnaeus 1758, at Bird Island, South Georgia
population status. We assessed the status of white-chinned petrels at Bird Island, South Georgia by comparing ... the distributioin and density of occupied burrows in 1981 and 1998. In both surveys white-chinned ... petrel burrows occurred in one-quarter of the 460–47736-m2 quadrats surveyed. The total number of burrows ... in each quadrat was consistent between each survey but we estimate an overall decrease of 28% in ...
Meeting Document : WG-FSA-01/26 Rev. 1 : Auteur(s): S.D. Berrow, J.P. Croxall and S.D. Grant (United Kingdom)
-
Results of the Dissostichus spp. new fisheries projects in the Antarctic region (CCAMLR Statistical Subareas 48.1, 48.2 and 88.3)
part of the New Fisheries Projects developed by Chile, mainly in order to establish presence of ... were used for the operations, with variable quantities of fishhooks (1 440-4 320), No. 9 Mustard Kirby ... ) were used as bait. The results of this research indicated that the Antarctic toothfish (D. mawsoni) was ... registered on the surroundings of Pedro I Island (Latitude 68°49'S), and from the Bellingshausen Sea ...
Meeting Document : SC-CAMLR-XVII/BG/07 Rev. 1 : Auteur(s): Delegation of Chile
-
ANALYSIS OF KRILL OBSERVER COVERAGE IN SUBAREA 48.3
been implemented since 2002. Observers have been placed on approximately 50% of vessels fishing in any ... one season, and have been present on board for about 30% of the fishing season. They have achieved a ... rate of sampling equivalent to 18% of total hauls taken in a season being sampled for krill and 11% for ... variance, the between vessel variance being about 45% of total variance. However, the ratio is sufficiently ...
Meeting Document : WG-EMM-09/25 : Auteur(s): D.J. Agnew, P. Grove, T. Peatman, R. Burns and C. Edwards (United Kingdom)
-
RESPONSE OF ANTARCTIC BENTHIC COMMUNITIES TO DISTURBANCE: WRST RESULTS FROM THE ARTIWCIAL BENTHIC DISTURBANCE EXPERIMENT ON THE EASTERN WEDDELL SEA SHELF, ANTARCTICA
simulate the impact of grounding icebergs on the seabed and follow the steps and timescales of recovery of ... this experimental field study. By means of 11 densely-placed hauls with a modified bottom trawl, a ... seabed area of approximately 100 x 1000 m was artificially scoured to inflict a similar damage to the ... drastically reduced by a factor of 10, while mean abundances were only slightly reduced. Demersal fish biomass ...
Meeting Document : WS-VME-09/P05 : Auteur(s): Rossi, S., Mintenbeck, K., Knust, R., Isla, E., Gerdes, D.
-
Net sample validation of acoustic techniques used to identify and size Antarctic krill
identified and distinguished from all other types of backscatter. Traditionally this has been achieved by ... sampling characteristic types of acoustic target with nets. More recently partitioning of backscatter into ... the functionality of acoustic target identification techniques. Mean volume backscattering strength ... collected with an RMT8. Around 80 % of the targets thought to be krill on the basis of their appearance on ...
Meeting Document : WG-EMM-97/46 : Auteur(s): Watkins, J.L., Brierley, A.S.
-
Population dynamics of wandering albatross Diomedea exulans and Amsterdam albatross D. amsterdamensis in the Indian Ocean and their relationships with longline fisheries: conservation implications
1986 have shown slow recovery. The population of the endangered Amsterdam albatross Diomedea ... study of the Crozet population indicates that the earlier decline was mainly the result of increased ... adult mortality, and secondarily of low recruitment. Satellite tracking studies of breeding birds and ... band recoveries of non breeding birds indicate that during and outside the breeding season these ...
Meeting Document : WG-FSA-96/09 : Auteur(s): Jouventin, P., Brothers, N., Weimerskirch, H.
-
Population change in gentoo penguins Pygoscelis papua at South Georgia: potential roles of adult survival, recruitment and deferred breeding
survival and recruitment rates, to model the fluctuations in breeding populations, taking account of ... variations introduced by good and bad years (as classified on the basis of breeding success). There is ... major population changes (large decreases followed by substantial increases) occurred. Three of these ... years were associated with reduced availability of krill, one with very cold winter and spring ...
Meeting Document : WG-CEMP-93/08 : Auteur(s): J.P. Croxall and P. Rothery (United Kingdom)
-
Status of living resources
3.1.1 Status of Antarctic marine living resources under the purview of CCAMLR Recommendation ... that are depleted relative to the requirements of Article II. This should include recovery targets and ... the impact of multi-year research catch limits on overfished toothfish populations (392.92 KB); (2012 ... process – list of depleted species (Task 2) under way (SC-CAMLR-XXIX, Annex 8, paragraph 5.186) 3.1.1.2 ...
Page : Site Section: The Organisation
-
Apparent decrease of Weddell seal numbers in the western Ross Sea
Edisto-Moubray as well. The timing of decline, or perhaps spreading (low numbers of seals in more places ... . We analyzed both historic and satellite-derived ice data but found only an expansion of pack ice in ... the larger region and a thinning of fast ice along Victoria Land (conceivably beneficial to seals ... ). Timing of freeze and breakup of the fast ice remains the same. The only other major change to the Ross ...
Meeting Document : WG-EMM-14/44 : Auteur(s): D.G. Ainley, M.A. Larue (USA), I. Stirling (Canada), S. Stammerjohn and D.B. Siniff (USA)
-
Incorporation of science advice from the CCAMLR working groups and Scientific Committee into the krill assessment model for Subarea 48.1
series of papers and presentations to WG-EMM, WG-FSA and WG-SAM from 2011 to 2016. The full text of the ... during that period is included as an Appendix to this document. The purpose of this paper is to summarize ... date along with a description of how the model has incorporated those suggestions, and to obtain advice ... from WG-SAM regarding whether the parameter estimation portion of the current model appears mature ...
Meeting Document : WG-SAM-17/32 : Auteur(s): D. Kinzey, G.M. Watters and C.S. Reiss