Résultats de la recherche
-
Food consumption estimates of southern elephant seal females during their post-breeding aquatic phase at South Shetland Islands
in a loss of 35% of the initial mass, comprising 63% of initial body fat and 20% of initial body ... gained while at sea. However, protein loss expressed in absolute terms or as a proportion of that present ... , King George Island (25 de Mayo). During lactation females spent a mean of 6021±1365 Mj, which resulted ... to recover an average of 55% of the mass, including 46% of the fat, 71% of the protein and 47% of the ...
Meeting Document : WG-EMM-04/33 : Auteur(s): A.R. Carlini, G.A. Daneri, M.E.I. Márquez (Argentina), H. Bornemann (Germany), H. Panarello, R. Casaux (Argentina), S. Ramdohr and J. Plötz (Germany)
-
An Apparent Decrease in the Prevalence of “Ross Sea Killer Whales” in the Southern Ross Sea
very abundant penguin, seal and whale components, loss of the toothfish option for Ross Sea killer ... the loss of large fish as a prey choice. Author(s): D.G. Ainley, G. Ballard and S. Olmastroni Title ... occurrence patterns and diet of RS killer whales, and present new information on numbers observed in the ... large Antarctic toothfish (Dissostichus mawsoni), as the review herein demonstrates. On the basis of sea ...
Meeting Document : WG-EMM-09/P01 : Auteur(s): D.G. Ainley, G. Ballard and S. Olmastroni
-
A quantified Bayesian maximum entropy estimate of Antarctic krill abundance across the Scotia Sea and in small-scale management units from the 2000 CCAMLR survey
Abstract: We present the results of an alternative method of estimating krill abundance, and ... producing maps of krill distribution, from the data collected during the 2000 CCAMLR survey of the Scotia ... unsurveyed off-transect portions of the survey area were found by interpolation, and thus values for total ... inferred. The MaxEnt formalism allows an objective choice of the parameters of the interpolation, and hence ...
Meeting Document : WG-EMM-05/42 : Auteur(s): B.G. Heywood, S.F. Gull and A.S. Brierley (United Kingdom)
-
Descriptive analysis of mesopelagic backscatter from acoustic data collected in the Ross Sea
Abstract: This report presents results from a pilot study to investigate the use of acoustics to ... quantify spatial and vertical distribution of acoustic backscatter in the upper 1000 m of the water column ... . There were clear spatial patterns in the amount and type of mesopelagic backscatter observed. There was ... much more backscatter in the upper 1000 m and a wider variety of mark types north of 67° S. Common mark ...
Meeting Document : WG-EMM-06/11 : Auteur(s): R.L. O’Driscoll (New Zealand)
-
Draft: differences in the foraging strategies of male and female Adelie penguins
Abstract: Consistent gender differences in foraging trip durations, feeding localities and diet ... of breeding Adelie penguins were demonstrated at two widely separated locations over a number of ... frequently and consumed larger quantities of krill, especially when chicks were small. Males tended instead ... on fish throughout chick rearing. The importance of these results to monitoring programs such as the ...
Meeting Document : WG-EMM-95/46 : Auteur(s): Franchi, E., Kerry, K., Clarke, J.
-
Acoustic estimates of krill density at South Georgia, December/January 1998/99
north-west and north-east of South Georgia during December/January 1998/99 were used to estimate mean ... krill density there. Densities (east = 11.1 g m-2, west = 12.0 g m-2) were towards the lower end of the ... range observed over the past two decades, but not abnonnally low, and comprised almost entirely of large ... estimates of krill density at South Georgia, December/January 1998/99 Approval: Approved ...
Meeting Document : WG-EMM-99/20 : Auteur(s): A.S. Brierley and C. Goss (United Kingdom)
-
The effect of different methodologies used in penguin diet studies at three US AMLR predator research sites: Admiralty Bay, Palmer Station and Cape Shirreff
Abstract: Diet studies are a key component of the CCAMLR predator monitoring program as they ... provide direct assessments of the prey types and amounts of import to predators, which, in turn, are ... hypothesized to influence variability in related parameters such as breeding success, foraging trip durations ... and chick fledging weights. Given the importance and interdependence of diet studies to monitoring ...
Meeting Document : WG-EMM-99/46 : Auteur(s): W. Trivelpiece, S. Trivelpiece (USA) and K. Salwicka (Poland)
-
Patterns and processes in the distribution and dynamics of Antarctic krill
spatially variable growth rates of krill, krill loss rates due to predators, density-dependent attraction of ... Abstract: A general framework is presented to develop, test and integrate component models of the ... distribution and dynamics of Antarctic krill population at various spatial and temporal scales. We suggest that ... models of increasing complexity be developed iteratively for variability and patchiness of krill ...
Meeting Document : SC-CAMLR-VII/BG/20 : Auteur(s): United States of America
-
Diving location and depth of breeding chinstrap penguins during incubation and chick-rearing period in King George Island, Antarctica
Island, Antarctica, diving characteristics of breeding chinstrap penguin parents were recorded by ... short trip hours during chick-rearing period. In addition, chinstrap penguins exhibited deeper dive ... need of chick-feeding and the temporal changes in prey availability between the two reproduction stages ... depth of breeding chinstrap penguins during incubation and chick-rearing period in King George Island ...
Meeting Document : WG-EMM-17/P01 : Auteur(s): W.Y. Lee, S. Park, N. Choi, K.W. Kim, H. Chung and J.-H. Kim
-
On the accuracy of the pellet analysis method to estimate the food intake in the Antarctic shag Phalacrocorax bransfieldensis
Abstract: The accuracy of correction factors estimated to compensate the digestion and loss ... through the gastrointestinal tract of the otoliths of fish represented in pellets of the Antarctic Shag ... Phalacrocorax bransfieldensis was tested at two localities of the South Shetland Islands. F or such purpose, the ... results from the analysis of 226 and 115 pellets collected at Harmony Point and at Duthoit Point ...
Meeting Document : WG-EMM-97/61 : Auteur(s): Casaux, R.