Search results
-
Effects of variability in prey abundance on reproduction and foraging in chinstrap penguins (Pygoscelis antarctica)
contend with large interannual fluctuations in prey availability and hence the cost of chick provisioning ... abundance of Antarctic krill Euphausia superba in the vicinity of Seal Island, South Shetland Islands, 1990 ... offspring provisioning, the most energetically costly component of seabird parental care, adults need to ... somewhere along the continuum between maintaining constant investment in foraging effort between years and ...
Meeting Document : WG-EMM-06/P6 : Author(s): D.A. Croll, D.A. Demer, R.P. Hewitt, J.K. Jansen, M.E. Goebel and B.R. Tershy (USA)
-
Revised continuation proposal of a multi-Member longline survey on Patagonian toothfish (Dissostichus eleginoides) in Division 58.4.4b in 2018/19 by Japan and France
Abstract: Japan and France revised a plan to continue to investigate the populations of ... Patagonian toothfish (Dissostichus eleginoides) in the Division 58.4.4b during the next fishing season (2018 ... Japan so that selectivity and catch rates can be standardized across the vessels and impacts of ... depredation be minimized. Additional outcomes of the research relate to documenting the degree of depredation ...
Meeting Document : WG-FSA-18/44 : Author(s): Delegations of Japan and France
-
Continuation proposal of a multi-Member longline survey on Patagonian toothfish (Dissostichus eleginoides) in Division 58.4.4b in 2018/19 by Japan and France
Abstract: Japan and France propose a plan to continue investigate the populations of Patagonian ... toothfish (Dissostichus eleginoides) in the Division 58.4.4b during the next fishing season (2018/19) from ... selectivity and catch rates can be standardized across the vessels and impacts of depredation be minimized ... . Additional outcomes of the research relate to documenting the degree of depredation, tagging toothfish for ...
Meeting Document : WG-SAM-18/03 : Author(s): Delegations of Japan and France
-
Movements of tagged Antarctic toothfish (Dissostichus mawsoni) in Subarea 48.6 in relation to stock structure hypotheses
48.6 in relation to life history hypotheses. Most of long-distance movements occurred in westward ... feeding grounds, respectively, have been observed to date. The lack of tag movement between the two areas ... is similar to those observed in the Amundsen Sea region (SSRUs 88.2C-H) where few tags move between ... Abstract: We examined movements of tagged Antarctic toothfish (Dissostichus mawsoni) for subarea ...
Meeting Document : WG-FSA-2019/05 : Author(s): T. Ichii, M. Okazaki, T. Okuda and S. Somhlaba
-
A development of catch per unit effort (CPUE) trends that may be useful in stock assessment for Dissostichus mawsoni in Subarea 48.6
these data to extract annual time series trends that may be of use in the fitting of stock assessment ... models for Dissostichus mawsoni (D. mawsoni) in the area. The entire fishing area in 48.6 which is ... subarea. The trends from these models reflect stable to a slight increase in CPUE since 2013 which might ... development of catch per unit effort (CPUE) trends that may be useful in stock assessment for Dissostichus ...
Meeting Document : WG-SAM-2019/37 : Author(s): S. Somhlaba, K. Leach, M. Bergh, T. Okuda, T, IIchi, R. Sarralde and T. Namba
-
Dynamics of Antarctic penguin populations in relation to inter-annual variability in sea-ice distribution
Abstract: To investigate the role of sea ice cover on penguin populations we used principal ... apparent inverse density-dependent relationship between the number of Adélie breeding pairs and the number ... particular time prior to the start of the breeding season was related to the number of birds that arrived to ... outside the breeding season may play an important role in penguin population processes. Author(s): Murphy ...
Meeting Document : WG-EMM-96/10 : Author(s): Murphy, E.J., Croxall, J.P., Trathan, P.N.
-
Preliminary assessment of mackerel icefish (Champsocephalus gunnari) in Subarea 48.3 based on a UK survey in January 2004
of a UK bottom trawl survey during January 2004. Using CCAMLR decision rules, an estimate of the one ... age 2+ fish only (age 1+ were not available from UK acoustic data in 2004). Estimates of short-term ... assessment of mackerel icefish (Champsocephalus gunnari) in Subarea 48.3 based on a UK survey in January 2004 ... Abstract: A preliminary assessment of mackerel icefish, Champsocephalus gunnari, was undertaken ...
Meeting Document : WG-FSA-04/78 : Author(s): R.C. Wakeford, D.J. Agnew, M.B. Collins and G.B. Parkes(United Kingdom)
-
Operation results of Ukrainian vessels at Antarctic krill fishery in Subareas 48.2 and 48.3 in March-June 1994. Krill size composition
, YugNIRO scientist is on board the latter one. The fishery and scientific information given in this paper ... is based on operative data. That is why some correction of these data is possible after the ... results of Ukrainian vessels at Antarctic krill fishery in Subareas 48.2 and 48.3 in March-June 1994 ... Abstract: In 1993 Ukraine has recommenced krill fishing which was terminated in 1993. It is ...
Meeting Document : WG-Krill-94/33 : Author(s): V.A. Bibik and V.N. Yakovlev (Ukraine)
-
Possible effects of different levels of krill fishing on predators – some initial modelling attempts
adult survival (S?) This rate is taken (in the first instance) to be equal to the estimate of mean ... inconsistency is that the mean adult survival rate estimates provided by CCAMLR (1993) do not pertain ... fixed y), but fluctuates over time. This means that S, and SI also fluctuate over time, as determined ... predator species considered for the deterministic model, as evaluated by means of equation ... CCAMLR Ecosystem Monitoring Program (WG-CEMP) in 1992, in order to investigate the possible effects of ... that variability in the annual recruitment of krill results in predator populations being less ... some krill predator populations, and on the possibility of biases in their estimation. These matters ... will need to be taken into account in future developments of this approach, before the latter can claim ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 79–97 : Author(s): Butterworth, D.S. and R.B. Thomson
-
Revised research program of Ukraine in Subarea 48.1 in 2018
longline in the eastern part of Subarea 48.1. Author(s): Delegation of Ukraine Title: Revised research ... program of Ukraine in Subarea 48.1 in 2018 Approval: Approved Secretariat Workflow Status: Content ... Abstract: Ukraine proposes to carry out a scientific survey of Dissostichus spp. by bottom ...
Meeting Document : WG-FSA-17/32 : Author(s): Delegation of Ukraine