Результаты поиска

1. Age distribution of breeding female Antarctic fur seals in relation to changes in population growth rate

   growth at Bird Island had declined to below 3% annually by 1988 compared with rapid growth (17%) in 1958 ... -1972. Exponential models fitted to the frequency distribution of age-classes greater than age 5 years ... Georgia, in 1988 was compared with the age distribution of a sample obtained in 1971-1973. The mean age in ... 1971-1973 was 7.41 (SE = 0.26) years and in 1988 it was 6.93 (SE = 0.20) years. After correction for ...

   Meeting Document : WG-CEMP-91/21 : Автор(ы): I.L. Boyd, N.J. Lunn, P. Rothery and J.P. Croxall (United Kingdom)

2. Plastic ingestion by petrels breeding in Antarctica

   chicks of Wilson’s Storm Petrels that had died before fledging. Few or no plastics were found in Snow ...

   Meeting Document : CCAMLR-VIII/BG/09 : Автор(ы): J.A. van Franeker (Netherlands) and P.J. Bell (Australia)

3. Seabird research at Cape Shirreff, Livingston Island, Antarctica, 2005/06

   all of the previous eight years of diet sampling; however, foraging trip durations were shorter than ... which were 51-55mm in length. This is a continuation of a four year trend with increasing proportions of ... previous season and is the third lowest population size in the 10 years of census data. The chinstrap ... penguin breeding population has been declining for the Past eight years and is at its lowest size in the ...

   Meeting Document : WG-EMM-06/P1 : Автор(ы): E.S.W. Leung, R.A. Orben and W.Z. Trivelpiece (USA)

4. Temporal variability in Adélie penguin CEMP parameters and their response to changes in prey availability

   , foraging trip duration, meal mass and fledgling weights. Some years had either good breeding success with ... response parameters was much greater than was observed in the two years with concurrent krill abundance. If ... heavy fledglings or poor breeding success with light fledglings while others had a lack of concordance ... between breeding success and fledgling weight. These discordant years also had an inconsistency between ...

   Meeting Document : WG-EMM-12/22 : Автор(ы): L. Emmerson and C. Southwell (Australia)

5. Temporal variability in Adélie penguin CEMP parameters and their response to changes in prey availability

   , foraging trip duration, meal mass and fledgling weights. Some years had either good breeding success with ... response parameters was much greater than was observed in the two years with concurrent krill abundance. If ... heavy fledglings or poor breeding success with light fledglings while others had a lack of concordance ... between breeding success and fledgling weight. These discordant years also had an inconsistency between ...

   Meeting Document : WG-EMM-12/48 : Автор(ы): L. Emmerson and C. Southwell (Australia)

6. Multiple acoustic estimates of krill density at South Georgia during 2000/2001 reveal significant intra-annual and spatial variability

   early- and late-season surveys were associated with logistic support voyages to South Georgia and were ... that is consistent with observations from previous years, krill density in the western box mid-season ... around South Georgia in the 2000/2001 season: in October 2000 (early-season); during late December ... / early January 2000/2001 (mid-season), and in March 2001 (late-season). The surveys were the first in a ...

   Meeting Document : WG-EMM-01/15 : Автор(ы): A.S. Brierley, C. Goss, S.A. Grant, J.L. Watkins, K. Reid, M. Belchier, I. Everson, M.J. Jessop, V. Afanasyev and J. Robst (United Kingdom)

7. Adélie penguin foraging behaviour and breeding success in seasons of contrasting krill availability (Mawson Coast, Antarctica)

   particularly apparent during the late guard to early crèche stages of chick rearing, coinciding with the timing ... differences between the two seasons included A5: foraging trip duration, A6: breeding success and A8: meal ... to the diet in 2003 but was only a minor component in 2001. Differences between years were ... period. Data on meal mass and foraging trip duration were combined to provide an index of provisioning ...

   Meeting Document : WG-EMM-03/44 : Автор(ы): J. Clarke, M. Tierney, S. Candy, S. Nicol, L. Irvine and K. Kerry (Australia)

8. Differences in distribution and population structure of krill (Euphausia superba) between penguin and fur seal foraging areas near Seal Island

   Seal Island were conducted to identify and evaluate their foraging areas during early January 1990/91 ... . 2-3 km in horizontal distance) of higher densities (≥250g/m2). In the inshore foraging areas krill ... , in the inshore foraging areas middle-sized krill (modal length 43 mm), which consisted mainly of ... nongravid krill, were dominant with occasional occurrences of juveniles (modal length 21 mm). In contrast ...

   Meeting Document : WG-KRILL-92/27 : Автор(ы): T. Ichii, H. Ishii (Japan), J.L. Bengtson, P. Boveng, J.K. Jansen (USA) and M. Naganobu (Japan)

9. Physical forcing in the southwest Atlantic: ecosystem control

   temperature anomalies at lag periods of approximately 3 to 4 years. Crosscorrelation analyses with temperature ... temperature fluctuations in the Pacific, with the Pacific leading South Georgia by approximately 3 years ... periods appear to be prior to the breeding season during the summer and early autumn of the preceding year ... physical environment has been recorded since the early part of the last century. For example, ocean ...

   Meeting Document : WG-EMM-04/34 : Автор(ы): P.N. Trathan, E.J. Murphy, J. Forcada, J.P. Croxall, K. Reid and S.E. Thorpe (United Kingdom)

10. Investigation of the sensitivity of the Ross Sea toothfish assessment to withholding subsets of the available data

    years, the change in estimated biomass arising from withholding data was much smaller, with values ... removing up to four years of the early tag data had little effect on the estimate of the initial biomass ... the effect of not updating an assessment every year, and also the evolution of stock assessments with ... assessments, when each extra year of withheld data represented a large contribution to the model. In later ...

    Meeting Document : WG-SAM-11/17 : Автор(ы): S. Mormede (New Zealand)

Страницы