Resultados de la búsqueda

1. Influence of tag numbers, size of tagged fish, duration of the tagging program, and auxiliary data on bias and precision of an integrated stock assessment

   Abstract:  Using a modeling framework for toothfish population dynamics, fishing and data collection, this study investigated how the bias and precision of a CASAL assessment is influenced by various aspects of a tagging program, in particular the effects of the numbers of fish tagged, the duration

   Meeting Document : WG-SAM-12/24 : Autor(es): P.E. Ziegler (Australia)

2. Are tagging targets set in appropriate terms?

   Abstract:  Currently the target tagging rate to be achieved by vessels fishing in the CCAMLR area is set in terms of the number of fish tagged per mass of fish caught thereby mixing “units” of measure. This note questions whether it is appropriate to set the tagging targets these terms and suggests

   Meeting Document : WG-SAM-12/25 : Autor(es): R.W. Leslie and C. Heinecken (South Africa)

3. Results of a research survey to monitor abundance of pre-recruit Antarctic toothfish in the southern Ross Sea, February 2012

   Abstract:  At its 2011 meeting, the Scientific Committee agreed that a time series of relative recruitments from a well-designed survey could be a useful input into the Ross Sea stock assessment model and endorsed a proposal to carry out this work once the fishery had closed at the end of the 2011

   Meeting Document : WG-SAM-12/29 : Autor(es): S.M. Hanchet, S. Mormede, A. Dunn (New Zealand) and H.-S. Jo (Republic of Korea)

4. The development of spatially and temporally controlled measures of survival and tag-detection for the CCAMLR tagging program

   Abstract:  A reliable commercial tagging program is critical to the successful assessment and management by CCAMLR of a number of toothfish fisheries in Antarctica. The evaluation of the tagging programme relies on two key aspects (i) that the tagged fish have a good chance of survival and (ii)

   Meeting Document : WG-SAM-12/30 : Autor(es): S. Mormede and A. Dunn (New Zealand)

5. Recommendations for CCAMLR tagging procedures

   Abstract:  With the recognition that CCAMLR tagging programmes are used for abundance estimation of toothfish and skates, tagging operations need to be appropriately supported through documentation, training, and supplies. This paper reviews how tagging programme information could be effectively

   Meeting Document : WG-SAM-12/31 : Autor(es): S. Parker, J. Fenaughty (New Zealand), E. Appleyard (Secretariat) and C. Heinecken (South Africa)

6. Drawing on international experience to improve performance of CCAMLR tagging programs

   Abstract:  Mark-recapture methodologies are commonly used to inform the management of fisheries. In addition to answering targeted research questions, tagging programmes are typically used to describe movement patterns relative to stock unit identification or to support spatial disaggregation of

   Meeting Document : WG-SAM-12/26 : Autor(es): S. Parker and S. Mormede (New Zealand)

7. Viability criteria for tagging toothfish

   Abstract:  CCAMLR Conservation measures currently require vessels to tag only toothfish with a high probability of survival, but no objective criteria are provided for this evaluation. Achieving this requires an objective evaluation of the probability of survival of each fish to be tagged, which in

   Meeting Document : WG-SAM-12/27 : Autor(es): S. Parker (New Zealand)

8. The distribution of spatial management and Antarctic krill catch across pelagic bioregions in the Southern Ocean

   Abstract:  We have developed a Geographic Information System (GIS) and accompanying metadata to provide standardised and accessible information on the location and extent of spatial fisheries management measures in the Southern Ocean.  We used the GIS in combination with catch data and the results

   Meeting Document : WG-EMM-12/15 : Autor(es): S.M Grant, S.L. Hill and P. Fretwell (United Kingdom)

9. Two decades of variability in krill predators at Bird Island, South Georgia and their potential as ecosystem indicators

   Abstract:  The breeding performance of seabirds and seals at Bird Island, South Georgia, in the Southern Ocean, has been recorded annually for over two decades as part of a large marine ecosystem monitoring programme. We examined the mechanistic relationships between, and patterns of inter-annual

   Meeting Document : WG-EMM-12/16 : Autor(es): S.L. Hill, C.M. Waluda, H.J. Peat and S. Fielding (United Kingdom)

10. Diet variability and reproductive performance of macaroni penguins (Eudyptes chrysolophus) at Bird Island, South Georgia

    Abstract:  We analysed summer diet and fledging mass of macaroni penguins Eudyptes chrysolophus breeding at Bird Island, South Georgia during the crèche period (January and February) between 1989 and 2010. Crustaceans were the main prey accounting for over 90 % of the diet by mass. Antarctic krill

    Meeting Document : WG-EMM-12/17 : Autor(es): C.M. Waluda, S.L. Hill, H.J. Peat and P.N. Trathan (United Kingdom)

Páginas