Search results
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Acoustic visualization of the three-dimensional prey field of foraging chinstrap penguins
Antarctic krill, a keystone prey species in the Southern Ocean food web. It has been difficult to evaluate ... natural predators. Here, we report a novel method for assessing prey availability to an important krill ... -dimensional distribution of krill within a 1852 X 1852 X 100 m volume of ocean. Our study revealed the ... predict predator responses to a changing food environment. Author(s): J.E. Zamon, C.H. Greene, E. Meir ...
Meeting Document : WG-Joint-94/12 : Author(s): J.E. Zamon, C.H. Greene, E. Meir, D.A. Demer, R.P. Hewitt and S. Sexton (USA)
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Evaluation of VME taxa classification by scientific observers from New Zealand vessels in the Ross Sea Antarctic toothfish longline fishery during the 2009/10 season
areas south of 60°S) to collect and monitor longline bycatch for VME taxa, and implement a move-on rule ... was conducted. Scientific Observers classified invertebrate bycatch using a revised and expanded VME ... samples). In the Echinodermata group, brittle stars (a non-VME taxon) were sometimes recorded as snake ... stars (a VME taxon). Briefings prior to sailing and additional training materials can address most ...
Meeting Document : TASO-10/10 : Author(s): D.M. Tracey, M.E. Carter and S.J. Parker (New Zealand)
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Stability of trip selections for the assessment of Antarctic toothfish in the Ross Sea
Abstract: A dataset for the 2009 assessment of Antarctic toothfish (Dissostichus mawsoni) in the ... tags, and/or where tags released on the trip were subsequently recaptured at a high rate. These trips ... were used to define a range for various data quality metrics considered to be informative with respect ... dataset. A retrospective analysis of this data selection method was undertaken to evaluate whether trip ...
Meeting Document : WG-FSA-10/26 : Author(s): D.A.J. Middleton (New Zealand)
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Research plan for the Spanish exploratory longline fishery for Dissostichus spp. in Divisions 58.4.1 and 58.4.2: Update of stage 2 (2013/14 season) and preliminary results of stage 1 (2012/13 season) according to WG-SAM advice
Abstract: A revision of the research plan and preliminary results of the Spanish exploratory ... not reach the threshold to start the depletion. A new prospective estimation of the local biomass (B ... densities, with a better fit of the regression and lower residuals than the previous analysis. An ... analysis of relevant sea-ice conditions in the last 11 seasons in these areas along with a summary of the ...
Meeting Document : WG-FSA-13/15 : Author(s): R. Sarralde, L.J López Abellán and S. Barreiro (Spain)
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Age-structured production model for toothfish at South Georgia
. Convergence problems were noted for the highly parameterised versions of this model. Revisions ... . Convergence problems were noted for the highly parameterised versions of this model. Revisions ...
Meeting Document : WG-FSA-SAM-05/18 : Author(s): A. Payne, G.P. Kirkwood, R. Hillary and D.J. Agnew (United Kingdom)
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Beach debris survey, Main Bay, Bird Island, South Georgia, 2002/03
Island, South Georgia, a total of 183 items was collected. This represents a 5.0% decrease on the total ... (3.6 kg) was a decrease of 1 kg since last year. There was a decrease in the proportion of nylon ...
Meeting Document : SC-CAMLR-XXIII/BG/13 : Author(s): Delegation of the United Kingdom
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Report of the Steering Committee for the WG-EMM Workshop on Plausible Ecosystem Models for Testing Approaches to Krill Management
advance a program of work to develop and implement operating models to investigate the robustness of ... in the development of models at the workshop, (ii) a review of relevant literature and information on ... a catalogue of available software and other simulation environments for ecosystem modelling, (iv ... work are outlined. Also provided in this report is a draft agenda for the workshop. Title: Report of ...
Meeting Document : WG-EMM-04/25
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Review of CCAMLR activities on monitoring marine debris in the Convention Area
, reached a peak in the period 1994–1996 at Bird Island and Signy Island has declined thereafter. The level ... ) entanglement at Bird Island reached a peak in 1993 and showed a decline until 2000 since when there has been a ...
Meeting Document : SC-CAMLR-XXII/BG/25 : Author(s): Secretariat
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Antarctic fur seal population dynamics update and assessment of census error at SSSI No. 32, Livingston Island, South Shetlands, Antarctica (2000/2001)
up to date have been single counts and do not allow the calculation of confidence limits, a protocol ... error and pup numbers show a linear trend, however, some outliers (outside the 95%CI) could be ... censuses in a considerable way. These factors should all be assessed and taken into account when ... error, thus supporting the hypothesis that the A. gazella population at SSSI Nº32 is reaching stability ...
Meeting Document : WG-EMM-01/49 : Author(s): R. Hucke-Gaete (Chile)
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Notes on the availability of three important finfish species in offshore waters of the lower South Shetland Islands (Subarea 48.1)
collected from a single year, the sample size and regression range available for length-weight relationships ... can be increased. However, the value of these data as a combined singular data set for one year of ... sampling is limited. A future offshore survey coupled with inshore sampling would provide substantially ... more information, and allow a more direct comparison of the two data sets to be realised, particularly ...
Meeting Document : WG-FSA-99/31 : Author(s): C.D. Jones (USA), E.R. Barrera-Oro, E.R. Marschoff and R.J. Casaux (Argentina)