Résultats de la recherche
-
Uncertainty in acoustic surveys of Antarctic krill
remote species identification (Demer et al., submitted). The technique was used to apportion the ... acoustic surveys. The variance in system calibration with a standard sphere was evaluated in relation to ... different standard spheres with the results of a calibration by self-reciprocity (Demer and Hewitt ... , submitted). Combining the results of these experiments, the accuracy and precision of a system calibration ...
Meeting Document : WG-EMM-95/72 : Auteur(s): Demer, D.A.
-
Genetic structuring of Patagonian toothfish populations in the southwest Atlantic Ocean: the effect of the Antarctic Polar Front and deep-water troughs as barriers to genetic exchange
effects or (putative) male-biased dispersal. Author(s): P.W. Shaw, A.I. Arkhipkin and H. Al-Khairulla ... sites. Mitochondrial DNA (mtDNA) data indicated a sharp genetic division between the Patagonian Shelf ... these data indicate that the APF, as a barrier to larval dispersal, is the major inhibitor of genetic ...
Meeting Document : WG-FSA-04/21 : Auteur(s): P.W. Shaw, A.I. Arkhipkin and H. Al-Khairulla (United Kingdom)
-
Penguins, fur seals, and fishing: prey requirements and potential competition in the South Shetland Islands, Antarctica
et al. who asserted that the potential for competition between South Shetland predators and the ... their foraging efforts on a single species, Antarctic krill (Euphausia superba). Because these predators ... may have a significant effect on krill abundance, we estimated the energy and prey requirements of ...
Meeting Document : WG-EMM-99/57 : Auteur(s): D.A. Croll and B.R. Tershy (USA)
-
Proposed initiative to contribute to Ross Sea region MPA research and monitoring activities using pop-up satellite tags and otolith chemistry on Dissostichus mawsoni
survey to monitor abundance of Antarctic toothfish in the southern Ross Sea in 2018/19 (Stevens et al ... is to deploy a total 20 pop-off satellite tags (PSAT) on juvenile toothfish within the General ... ., 2018), and a winter longline survey of Antarctic toothfish in the northern region of Subareas 88.1 and ...
Meeting Document : WS-SM-18/16 : Auteur(s): C.D. Jones
-
An integrated stock assessment for the Heard Island and the McDonald Islands Patagonian toothfish (Dissostichus eleginoides) fishery in Division 58.5.2
parameters, the use of abundance estimates from a random stratified trawl survey (RSTS), longline tag-release ... -SAM-2015, and incorporates (a) new fishery observations up to 2015 including new ageing data from the ... catchability q, unfished spawning biomass B 0 and year class strength, and (e) a split of the trawl sub-fishery ... into two periods. All model runs were conducted with the CASAL version 2.30-2012-03-21 that was agreed ...
Meeting Document : WG-FSA-15/52 : Auteur(s): P. Ziegler and D. Welsford (Australia)
-
An integrated stock assessment for the Heard Island and McDonald Islands Patagonian toothfish (Dissostichus eleginoides) fishery in Division 58.5.2
, the use of abundance estimates from a random stratified trawl survey (RSTS), longline tag-release data ... , (3) updated maturity parameters, (4) updated tag loss estimates (5) a bias correction for fish ... the CASAL version 2.30-2012-03-21 rev. 4648 that was agreed on by WG-SAM-14. The updated assessment ... model leads to a smaller estimate of the virgin spawning stock biomass B 0 than that obtained in 2015 ...
Meeting Document : WG-FSA-17/19 : Auteur(s): P. Ziegler
-
Analysis of variables influencing finfish by-catch in the krill fishery in Area 48
fishery and quantify the impact of this bycatch on the finfish stocks (Peatman et al., 2012). Author(s ... Abstract: This report presents the results of a method used to explore potential explanatory ... potential explanatory variables was investigated using a delta-lognormal modelling approach. Time of day ... bycatch of the finfish family groupings. Results indicated that there was a wide disparity in the ...
Meeting Document : WG-EMM-12/28 : Auteur(s): S.M. Martin, T. Peatman, J. Moir Clark (United Kingdom), O.R. Godø (Norway) and R.C. Wakeford (United Kingdom)
-
Scientific contribution to the 2016 review of Conservation Measure 51-07: Part 2 – outcomes from the application of the risk assessment framework for distributing the krill trigger level in Area 48
Watters et al (2013) in which FOOSA was used to explore the consequences of different harvest strategies ... the data within the risk assessment framework, and (ii) a discussion of the implications of this work ... pressure which is a measure of the potential for competition in local areas. Given the scenarios here ... on SSMUs in Area 48. Author(s): A. Constable (on behalf of the e-group on CM 51-07 WG-EMM review ...
Meeting Document : WG-FSA-16/48 Rev. 1 : Auteur(s): A. Constable (on behalf of the e-group on CM 51-07 WG-EMM review)
-
Density and abundance estimates of baleen whales recorded during the 2019 DY098 cruise in the Scotia Sea around South Georgia and the South Sandwich Islands
within the Scotia Arc ecosystem, sensu Reilly et al. (2004). Author(s): M. Baines, M. Reichelt, C. Lacey ... estimates, but may provide a useful means of comparing whale densities and habitat use patterns between the ... species during the survey (226 sightings of a total count of 495 whales) and were widely distributed east ... sightings and a cumulative count of 76 whales). Humpback whale abundance in South Georgia (Subarea 48.3) was ...
Meeting Document : WG-EMM-2019/27 : Auteur(s): M. Baines, M. Reichelt, C. Lacey, S. Pinder, S. Fielding, N. Kelly, E. Murphy, P. Trathan and J.A. Jackson
-
ESTIMATION OF IUU CATCHES OF TOOTHFISH INSIDE THE CONVENTION AREA DURING THE 2009/10 FISHING SEASON
58.4.1 and 58.4.4a. Changes from version 1 are highlighted in bold. ESTIMATION OF IUU CATCHES OF ... a product of the fishing time of IUU vessels and likely daily catch rates. The fishing time of IUU ... toothfish has occurred and which has not already been attributed to a sighting report. Information on the ...
Meeting Document : WG-FSA-10/06 : Auteur(s): Secretariat