Résultats de la recherche
-
Use of current velocity data from fram to investigate the large scale transport of krill in the Scotia Sea
Abstract: Current velocity data from a single time realisation of the FRAM model are presented ... for particular areas of the Scotia Sea. The regions are based on the CCAMLR sub-areas and also include ... boundaries over the upper 250m of the water column. These have been combined with estimates of krill density ... and standing stocks to consider the large scale flux of krill through the regions and estimate ...
Meeting Document : WS-Flux-94/05 : Auteur(s): E.J. Murphy (United Kingdom)
-
Assessment of fishable krill biomass on the basis of the acoustic surveys results using geostatistical methods
Abstract: ABSTRACT Applicability of geostatistical methods in processing the acoustic fields of ... krill density based on the acoustic survey data is demonstrated. The results obtained indicate ... usefulness of these methods in studying the structure of krill density field for biomass assessment in ... compliance with different thresholds of their fishery importance. The structure of krill density field in ...
Meeting Document : WG-SAM-10/07 Rev. 1 : Auteur(s): S.M. Kasatkina and P.S. Gasyukov (Russia)
-
A critical re-examination of the evidence for a possible dependence of Weddell seals (Leptonychotes weddellii) on Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea, Antarctica
Abstract: There is presently debate over the degree to which the fishery for Antarctic toothfish ... (Dissostichus mawsoni; ‘toothfish’) in the Ross Sea may affect the ecological viability of top predators such as ... the assumptions underlying application of stable isotope methodology to Weddell seals, and estimate ... the potential contribution of toothfish to the diet of Weddell seals using an isotope mixing model ...
Meeting Document : WG-EMM-13/28 : Auteur(s): R. Eisert, M.H. Pinkerton (New Zealand), S.D. Newsome and O.T. Oftedal (USA)
-
Quantifying the impacts of ice on demersal longlining in CCAMLR Subarea 88.1 with updated information on the 2014/15 season
Abstract: The effect of sea ice is acknowledged as a major influence on fishing operations in ... fisheries research and management. A retrospective analysis over a 15 year period up to the 2013/14 season ... was presented in WG-FSA-14/55 to quantify the level of impact that ice conditions have on fishing by ... creating an annual fishability index. We update the analysis for the 2015 season, a challenging ice year ...
Meeting Document : WG-FSA-15/35 : Auteur(s): J.M. Fenaughty and S.J. Parker (New Zealand)
-
Descriptive analysis of the toothfish (Dissostichus spp.) tagging programme in Subareas 88.1 & 88.2 for the years 2000–01 to 2014–15
Abstract: We provide an update of the descriptive analyses of the toothfish tagging programme in ... Subareas 88.1 and 88.2 through the 2015 season. A total of 44 827 Antarctic toothfish have been released ... years, most vessels have achieved or exceeded the required tagging rate of one toothfish per tonne of ... catch in the Ross Sea region. Tag recapture data showed that most fish are recaptured only a short ...
Meeting Document : WG-FSA-15/37 : Auteur(s): S.J. Parker and S. Mormede (New Zealand)
-
Analyses of illegal, unreported and unregulated (IUU) fishing activities in Divisions 58.4.1 during the 2013/14 season and 58.4.3b during the 2014/15 season
Abstract: Following Operation Sparrow 2, WG-FSA-17 noted the unprecedented availability of catch ... by an NGO vessel. As requested in WG-FSA-17 paragraph 2.16, this document provides an analysis of the ... spatio-temporal distributions of catch and effort by the Chang Bai, Nihewan and Jiangfeng in Division ... 58.4.1 during the 2013/14 season, as well as the Thunder in Division 58.4.3b during the 2014/15 season ...
Meeting Document : WG-FSA-18/60 : Auteur(s): Delegation of Australia and CCAMLR Secretariat
-
A RE-ANALYSIS AND UPDATE OF THE ANTARCTIC KRILL BIOMASS IN THE SOUTH SHETLAND ISLANDS, THROUGH 2011
-based estimates of krill density and recruitment are recalculated for the years 1996 through 2011 ... . Recent changes in the acoustic methodology and target strength models are the basis for the recalculation ... . The time series of acoustic biomass indicate that krill have varied by more than an order of magnitude ... over this time period. Current estimates for the South Shetland Islands region are 3.6, 1.9 and 1.35 ...
Meeting Document : WG-EMM-11/26 : Auteur(s): A. Cossio, C. Reiss and R. Driscoll (USA)
-
An examination of latitudinal variation in the growth rates of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea
(76° S) fell consistently below the von Bertalanffy curves calculated predominantly from data ... (62.5°–78.0° S). Between-zone comparisons were confounded by marked differences in the age structure of ... catches from the northern and southern sections of the range, and by the relatively high level of variance ... in the length-at-age data. There is no statistically significant difference in mean growth rates of D ...
Meeting Document : WG-FSA-03/30 : Auteur(s): P.L. Horn (New Zealand)
-
Descriptive analysis of the toothfish (Dissostichus spp.) tagging programme in Subareas 88.1 & 88.2 for the years 2000–01 to 2010–11
Abstract: Descriptive analyses of the toothfish tagging programme in Subareas 88.1 and 88.2 are ... updated, including summaries of data for the 2011 season. Overall, a total of 28 458 Antarctic toothfish ... recaptured since 2001. In recent years, most vessels have achieved or exceeded the target tagging rate of one ... toothfish per tonne of catch in the Ross Sea region. Tag recapture data showed that most fish are recorded ...
Meeting Document : WG-FSA-11/46 : Auteur(s): S. Mormede, A. Dunn and S.M. Hanchet (New Zealand)
-
UPDATED KRILL RECRUITMENT DATA FOR THE ELEPHANT ISLAND REGION OF THE SOUTH SHETLAND ISLANDS, ANTARCTICA; 2002-2008
Abstract: The proportional krill recruitment index is updated from 2002 to present using data ... from the US AMLR surveys around Elephant Island, Antarctica. Proportional recruitment indices were ... derived from the CMIX procedure, and were also derived as a proportion of the <30 mm length class for ... , with low recruitment occurring during the intervening years. Significant differences in the ...
Meeting Document : WG-EMM-08/41 : Auteur(s): C. Reiss (USA)