Résultats de la recherche

1. Influence of krill availability on humpback whale breeding success

   frequency of extreme El Niño events may compromise humpback whale’s rate of recovery in the Southern ... western Antarctic Peninsula (WAP), probably as a consequence of the effects of the considerable increase ... . Félix, M.-A. Lea, L. Dalla Rosa, G. Watters, K. Reid and E. Secchi Title:  Influence of krill ...

   Meeting Document : WG-EMM-18/P15 : Auteur(s): E. Seyboth, F. Félix, M.-A. Lea, L. Dalla Rosa, G. Watters, K. Reid and E. Secchi

2. Using effective sample sizes to evaluate the efficiency of length samples collected by at-sea observers in the krill fishery in Subarea 48.1

   of coverage of vessels and hauls (e.g., Agnew et al., 2009; 2010), less attention have been focussed ... on how many krill should be measured by observers should measure (however see Thannasekos et al. 2012 ... , collecting length data from the catch is a task undertaken by all at sea observes in CCAMLR fisheries ... different haul-wise sample sizes on the ability to estimate mean length in a sample per SSMU × month ...

   Meeting Document : WG-SAM-16/39 : Auteur(s): N. Kelly, S. Kawaguchi, P. Ziegler and D. Welsford

3. Results of the mark–recapture experiment in Subarea 48.3, 2005

   , which has been applied previously and described in detail by Agnew et al (2004) and Payne et al (2005 ... estimates by CASAL (see WG-FSA-05/16), and a selectivity estimated directly from the tagging data. Estimates ... , irrespective of the selectivity used. Author(s):  D.J. Agnew and A. Payne (United Kingdom) Title:  Results of ...

   Meeting Document : WG-FSA-05/17 : Auteur(s): D.J. Agnew and A. Payne (United Kingdom)

4. Revised outline of the dedicated krill survey for CCAMLR Division 58.4.1 during 2018/19 season by the Japanese survey vessel, Kaiyo-maru

   meeting in separate papers (Abe et al., 2018; Amakasu et al. 2018). The finalized plan will be submitted ... Abstract:  A dedicated krill survey for CCAMLR Division 58.4.1 during 2018/19 season will be ... provides a revised outline of the survey while detailed acoustic survey methods are presented to this ...

   Meeting Document : SG-ASAM-18/03 : Auteur(s): H. Murase, K. Abe, R. Matsukura, H. Sasaki and T. Ichii

5. Environmental variability and the behavioural dynamics of Antarctic fur seals in the South Atlantic

   environmental variation. In a multiple regression analysis, the El Niño/southern oscillation index (ENSO) and a ... Abstract:  Variability in the reproductive performance of marine predators may be a result of ... physical forcing by large-scale oceanographic variability. Time lags, remoteness from the epicentre of a ... climate variation. Fur seal foraging trip duration was transformed into a normally distributed index of ...

   Meeting Document : WS-AREA 48-98/16 : Auteur(s): I.L. Boyd (UK)

6. Direct ageing of Antarctic krill (Euphausia superba) – potential utility of eyestalk sections for age determination

   superba). Recent studies (Kilada et al. 2012), have shown that annular growth bands are present in the ... Antarctic Division and examined using the methods outlined in (Kilada et al. 2012). Two analyses are ... Abstract:  We outline a method for the direct determination of age in Antarctic krill (Euphausia ... endocuticle layer of the eyestalks and gastric mill in decapod crustaceans. Here we report on a preliminary ...

   Meeting Document : WG-EMM-15/45 : Auteur(s): C. Reiss (USA), R. Kilada (Canada) and S. Kawaguchi (Australia)

7. Trends of Antarctic fur seal population at SSSI No. 32, Livingston Island, South Shetlands, Antarctica

   affected by the El Niño Southern Oscillation phenomena might be given by the intrinsic rate of population ... had to model the population at the latter site, in order to have a complete estimate of the population ... . From this, we estimated an overall increase of 17% in the total population, including in this figure a ... , and the scattered historical data. Further evidence that the breeding population of A. gazella is ...

   Meeting Document : WG-EMM-99/16 : Auteur(s): R. Hucke-Gaete, D. Torres, A. Aguayo, J. Acevedo and V. Vallejos (Chile)

8. Population, breeding, diet and conservation of Crozet shag Phalacrocorax [atriceps] melanogenis at Marion Island, 1994/95 to 2002/03

   25% of the mature population did not breed in 1997/98, coincident with a strong El Niño Southern ... birds breeding in any given season. The decreases coincided with a period of warming and reduced ... precipitation at Marion Island and with a decrease in the number of gentoo penguins Pygoscelis papua breeding ... , but a change in dominance among nototheniid prey suggests availability of prey to shags changed after ...

   Meeting Document : WG-EMM-03/17 : Auteur(s): R.J.M. Crawford, J. Cooper, B.M. Dyer, A.C. Wolfaardt, D. Tshingana, K. Spencer, S.L. Petersen, J.L. Nel, D.G. Keith, C.L. Holness, B. Hanise, M.D. Greyling and M. du Toit (South Africa)

9. Coastal weather drives foraging behaviour of chinstrap penguins, Pygoscelis antarctica

   context, our study capitalises on the occurrence of an unexpected El Niño event to characterise how ... ) supports huge predator populations as well as a growing commercial fishery.  To utilize information from ... indices of krill predators have been proposed as a proxy for krill abundance.  However, there are several ... environmental variability can drive changes in predator foraging behaviour. We demonstrate a clear link between ...

   Meeting Document : WG-EMM-18/P14 : Auteur(s): A.D. Lowther, P. Trathan, A. Tarroux, C. Lydersen and K.M. Kovacs

10. Using predators and their prey to characterise the status of the marine ecosystem at South Georgia

    patchiness is probably a more important determinant of foraging success than density per se; (iv) previously ... krill densities. We suggest that a programme of work is needed to better characterise predator ...

    Meeting Document : WG-EMM-16/28 : Auteur(s): P. Trathan, S. Fielding, S. Hill, M. Belchier and J. Forcada

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