Résultats de la recherche
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The effects of CEMP monitoring procedures on Adelie penguin colonies
caused no significant increase in foraging trip durations nor any detectable effect on water turnover ... band and tag loss. There was a reduction in return rates of birds banded for more than one season, but ... during the incubation period or for several consecutive trips during chick rearing resulted in increased ... foraging trip durations and reduced breeding success. Attachment for a single foraging trip post-hatching ...
Meeting Document : WG-CEMP-93/19 : Auteur(s): J. Clarke, K. Kerry (Australia)
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Gear loss reported by longline fishing vessels for the 2018 and 2019 fishing seasons
. Vessels reported 1 632 km of line lost in the Convention Area, of which 27% were complete lines. There was ... no difference in the relative reporting of lost hooks by gear type, with rates of loss recorded at ... , including differences in line loss by gear type, is reviewed following recommendations made at WG-FSA-18 ... 0.3% for each gear type for the past two seasons. There was a significant difference in the frequency ...
Meeting Document : WG-FSA-2019/18 : Auteur(s): CCAMLR Secretariat
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Managing fisheries to conserve the Antarctic marine ecosystem: practical implementation of the Convention on the Conservation of Antarctic Marine Living Resources (CCAMLR)
1960s with exploitation of the marbled rockcod, Notothenia rossii, in the South Atlantic, a species ... Abstract: Apart from exploitation of seals and whales, Antarctic fisheries began in the late ... decimated in the first two years of the fishery following catches of about 500,000t. Two other species have ... (Champsocephalus gunnari), both of which still occur. Finfish catches declined in the 1980s but the development of ...
Meeting Document : SC-CAMLR-XVIII/BG/26
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Sexing fledglings and yearlings of magellanic penguins by discriminant analysis of morphometric measurements.
Abstract: Discriminant analysis was used to identify the sexes of fledglings and yearlings in the ... Magellanic Penguin (Spheniscus magellanicus). Eleven morphometric measurements were recorded in a sample of ... , followed by length of the middle toe and bill length. Yearling, besides being distinguishable by plumage ...
Meeting Document : WG-CEMP-90/42 : Auteur(s): J.A. Scolaro (Argentina)
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Foraging strategies of chinstrap penguins at Signy Island, Antarctica: importance of benthic feeding on Antarctic krill
krill Euphausia superba in the Southern Ocean. To examine their foraging strategy, we studied foraging ... trip patterns and diving behaviour of chinstrap penguins breeding at Signy Island, Antarctica, using ... ) and longer overnight (19.9 h) trips, with diurnal trips (74%) being dominant in number (263 out of 355 ... in diurnal foraging trips than overnight trips. Analysis of stomach contents showed that penguins on ...
Meeting Document : WG-EMM-03/37 : Auteur(s): A. Takahashi (Japan), M.J. Dunn, P.N. Trathan (United Kingdom), K. Sato, Y. Naito (Japan), J.P. Croxall (United Kingdom)
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Length-age composition of icefish (Champsocephalus gunnari, perciformes, notothenioidei, Channichthyidae) from different locations of South Georgia Island subarea
. Larger number of "mature" fish in the west is related to migration from eastern area of ... Abstract: Biostatistic data obtained by Soviet research and commercial vessels in 1970 to 1991 ... Eastern, Northern, Western, Southern Island Shelf and near Shag Rocks allowed for revealing similarity of ... Island and near Shag Rocks and finding a difference between those two groups and the eastern group ...
Meeting Document : WG-FSA-00/32 : Auteur(s): Zh.A. Frolkina (Russia)
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Approaches to evaluating and testing of CEMP methods for parameters A1, A5 and A7
around the peak arrival/fledging date may introduce substantial bias in CEMP parameters A1and A7. The ... description of foraging trip duration using the mean arising from a bimodal distribution of trip durations may ... foraging effort may provide a more sensitive measure of changes arising from changes in foraging strategies ...
Meeting Document : WG-EMM-04/60 : Auteur(s): G. Watters (USA) and K. Reid (United Kingdom)
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Food consumption estimates of southern elephant seal females during their post-breeding aquatic phase at South Shetland Islands
energy gain during the post-breeding aquatic phase in Southern elephant seal females at Stranger Point ... in a loss of 35% of the initial mass, comprising 63% of initial body fat and 20% of initial body ... energy lost during lactation. Neither the mass nor the energy lost during lactation were related to those ... gained while at sea. However, protein loss expressed in absolute terms or as a proportion of that present ...
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)
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Final report of scientific observation of commercial krill harvest aboard the Japanese stern trawler Niitaka Maru, 13 December 2000–26 January 2001
measurements of krill, product types are described in the report. The trawler made an anti-clockwise trip ... around the South Shetland Islands. During this trip, the vessel encountered a swarm rapidly moving ... could not catch in the other locations. The patches seemed to be relatively dispersed compared to the ...
Meeting Document : WG-EMM-01/38 : Auteur(s): T. Hayashi, S. Kawaguchi and M. Naganobu (Japan)
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Estimating density and biomass of Antarctic krill around South Sheltland Islands using the 2-dB difference method
2016 and 38 and 200 kHz from March 6 to 14 in 2017. Krill were collected by the commercial middle trawl ... estimated using an acoustics survey. Acoustic data were collected with 38 and 120 kHz from April 13 to 24 in ... v difference-3.0-13.8 dB in 2017, respectively. Krill density and biomass were significantly higher ... in 2016 than those in 2017. Author(s): S.-G. Choi, K. Lee and D. An Title: Estimating density and ...
Meeting Document : WG-EMM-17/08 : Auteur(s): S.-G. Choi, K. Lee and D. An