Résultats de la recherche

1. Quantifying within- and between-season variability in Adélie penguin fledgling weights: statistical and practical implications for detecting change

   Béchervaise Island and use them in a power analysis as a continuation of the CEMP review. The statistical ... fledgling weights with a decline in resource availability, the consideration of total chick failure during ... reducing to 30 the number of birds weighed in a single 5-day period each year. If practical, this outcome ... severe food shortages and a possible change in variance associated with a change in the mean value. With ...

   Meeting Document : WG-EMM-05/20 : Auteur(s): L. Emmerson, C. Southwell and J. Clarke (Australia)

2. Adélie penguin breeder abundance in CCAMLR Divisions 58.4.1 and 58.4.2

   future krill fisheries in those regions. We present here estimates of the breeding Adélie penguin ... Adelie penguins were attempting to breed at the time of the surveys in Divisions 58.4.1 and 58.4.2. This ... estimate is substantially higher than the previously available estimate in Woehler (1993) of 767,000 ... predators of the Southern Ocean including ice-breeding seals, fur seals, penguins and flying seabirds. The ...

   Meeting Document : WG-EMM-13/09 : Auteur(s): C. Southwell, J. McKinlay, L. Emmerson (Australia), A. Takahashi (Japan), C. Barbraud, K. DeLord and H. Weimerskirch (France)

3. Developing priority variables (“ecosystem Essential Ocean Variables” – eEOVs) for observing dynamics and change in Southern Ocean ecosystems

   support assessments. In this paper we outline the rationale, including establishing a set of criteria, for ... and use of eEOVs in an observing system in the Southern Ocean, noting that existing operations and ... , Atlantic and Indian.  Lastly, we discuss the importance of simulation modelling in helping with the design ... of the observing system in the long term.  Author(s):  A.J. Constable, D.P. Costa, O. Schofield, L ...

   Meeting Document : WG-EMM-16/P11 : Auteur(s): A.J. Constable, D.P. Costa, O. Schofield, L. Newman, E.R. Urban Jr., E.A. Fulton, J. Melbourne-Thomas, T. Ballerini, P.W. Boyd, A. Brandt, W. de la Mare, M. Edwards, M. Eléaume, L. Emmerson, K. Fennel, S. Fielding, H. Griffiths, J. Gutt, M.A. Hindell, E.E. Hofmann, S. Jennings, H.S. La, A. McCurdy, B.G. Mitchell, T. Moltmann, M. Muelbert, E. Murphy, T. Press, B. Raymond, K. Reid, C. Reiss, J. Rice, I. Salter, D.C. Smith, S. Song, C. Southwell, K.M. Swadling, A. Van de Putte and Z. Willis

4. JAPANESE SCIENTIFIC OBSERVER ACTIVITIES FOR KRILL FISHERY IN CCAMLR CONVENTION AREA FROM 2003/04 TO 2007/08 FISHING SEASONS

   the krill samples revealed the occurrence of black-spot disease in Antarctic krill and its relation to ... Abstract:  This document introduces the recent activities and outcome of Japanese scientific ... grounds of the Japanese fishery were the Subareas 48.1, 48.2, and 48.3. Recent observation effort was ... concentrated to the Subarea 48.3. The observer coverage was 32.2 – 51.4 %, and exceeded 50 % in 2007/08 season ...

   Meeting Document : WG-EMM-09/19 : Auteur(s): M. Kiyota and T. Iida (Japan)

5. Solutions to seabird by-catch in Alaska’s demersal longline fisheries

   and 2000) in 2 major Alaska demersal longline fisheries: the Gulf of Alaska /Aleutian Island ... we saw orders of magnitude variation in bycatch across years and in the case of the sablefish fishery ... conditions. We report the results of experimentally rigorous tests of seabird bycatch deterrents on the local ... abundance, attack rate, and hooking rate of seabirds in both fisheries. Based on our results, we recommend a ...

   Meeting Document : WG-FSA-01/35 : Auteur(s): E.F. Melvin, J.K. Parrish, K.S. Dietrich and O.S. Hamel (USA)

6. Selectivity-induced bias in growth parameter estimates

   Abstract:  A short simulation study has been carried out to investigate the size of the bias in ... producing considerably lower estimates of L? and higher estimates of K than in the true population. The ... being included in catch samples. Fish were included in catch samples from the population with ... selectivity function used in the simulations closely matched those used for current toothfish assessments in ...

   Meeting Document : WG-FSA-SAM-05/19 : Auteur(s): G.P. Kirkwood (United Kingdom)

7. Krill catch distribution in relation to predator colonies 1987 to 1992

   Abstract:  The distribution of krill catches in relation to land-based predator colonies ... , calculated from CCAMLR fine-scale data, is shown for Subareas 48.1 and 48.2. The pattern of catches in 1992 ... previous years. It is estimated that the catch in the critical period-distance was equal to 12% and 15% of ... the total exploitation of krill in these two subareas respectively. Author(s):  Secretariat Title ...

   Meeting Document : WG-KRILL-93/10 : Auteur(s): Secretariat

8. Towards a new method for age determination in Antarctic krill, and evidence that krill shrink under natural conditions

   -length and the crystalline cone number of the compound eye was examined. Samples collected in the late ... body-length offers a method for detecting the effect of shrinking in natural populations of krill. On ... maintained in conditions of low food availability. Recent studies have also demonstrated that E. superba ... individuals may be shrinking in the field during winter. If krill shrink during the winter, conclusions ...

   Meeting Document : WG-Krill-94/17 : Auteur(s): W. de la Mare (Australia)

9. Fish stock assessment survey in Subarea 48.3, 2004

   Abstract:  This report describes the activities and preliminary results of the 9th UK fish stock ... British Antarctic Survey scientists during January and February 2004. In addition to the random stratified ... bottom trawl survey the research was extended by a week in order that further investigations into the use ... of acoustic methods for the determination of icefish biomass could be undertaken. Following the ...

   Meeting Document : WG-FSA-04/85 : Auteur(s): M. Belchier, M. Purves, M. Collins, S. Hawkins, T. Marlow, R. Mitchell, J. Szlakowski and J. Xavier (United Kingdom)

10. Evaluating MPA scenarios in Planning Domain 1 using a dynamic food-web model

    . Author(s):  Delegation of the USA Title:  Evaluating MPA scenarios in Planning Domain 1 using a dynamic ... Abstract:  We describe a spatially and temporally dynamic food-web model of the region surrounding ... the Western Antarctic Peninsula that can be used to evaluate the potential impacts of various marine ... protected area (MPA) scenarios. We evaluate four MPA scenarios, including two representing portions of the ...

    Meeting Document : SC-CAMLR-XXXVII/BG/04 : Auteur(s): Delegation of the USA

Pages