Résultats de la recherche
-
MaxEnt reconstructions of krill distribution and estimates of krill density from acoustic surveys at South Georgia 1996–2000
of mean krill density within two survey boxes of dimensions 80 km x 100 km to the north east and ... north west of South Georgia. The reconstructions are generated from acoustic line transect survey data ... gathered in the boxes in austral summers 1996 – 2000. Krill densities had previously been determined at ... approximately 0.5 km intervals along transect for each of the ten 80 km transects in each box, providing about ...
Meeting Document : WG-EMM-02/36 : Auteur(s): M.H. Wafy, A.S. Brierley, S.F. Gull and J.L. Watkins (United Kingdom)
-
Anthropogenic feather soiling, marine debris and fishing gear associated with seabirds at Bird Island, South Georgia, 2000/01
fishing gear associated with seabirds at Bird Island, South Georgia. In this, the eighth year of ... . Quantities of fishing gear remained within the levels of previous years for all other species. Marine debris ... , the vast majority of which was plastics, showed a 28% increase from the maximum of the previous year ... for grey-headed albatrosses, but a 24% decrease from the maximum of the previous year for wandering ...
Meeting Document : SC-CAMLR-XX/BG/07 : Auteur(s): Delegation of the United Kingdom
-
Seabird observations in Subareas 48.1, 48.2 and 88.3 and proposal for a new streamer line design
of the New Fisheries Project developed by Chile in Statistical Subareas 88.3, 48.1 and 48.2. During ... , carrying out bird observations in each one of the 52 castings with the Spanish-designed longlines as well ... . The streamer line suggested by the CCAMLR was not appropriate during wind conditions, so an alternate ... simpler construction and increased visibility. Neither bird capture nor mortality was reported during the ...
Meeting Document : WG-FSA-98/19
-
Climate change and precautionary spatial protection: seasonal sea ice
Abstract: Regional climate change is now known to be well established in the Antarctic; however ... , the implications for biological systems remain poorly understood. Investigating how marine species ... little changed by human activities, particularly by the impacts (either direct or indirect) of marine ... harvesting. If CCAMLR is to embrace the wider implications of climate change in the context of ecosystem ...
Meeting Document : WS-MPA-11/18 : Auteur(s): P.N. Trathan and S.M. Grant (UK)
-
Dynamics of Antarctic penguin populations in relation to inter-annual variability in sea-ice distribution
Abstract: To investigate the role of sea ice cover on penguin populations we used principal ... regional (from remote sensing data) sea ice variables. Throughout the study period, the Adélie penguin ... apparent inverse density-dependent relationship between the number of Adélie breeding pairs and the number ... or breeding success and the local sea ice conditions. However, the regional sea ice extent at a ...
Meeting Document : WG-EMM-96/10 : Auteur(s): Murphy, E.J., Croxall, J.P., Trathan, P.N.
-
Using compact video camera technology for rapid deep-sea benthic habitat assessment
Abstract: A compact, autonomous deep sea video system designed and constructed by the Australian ... Antarctic Division (AAD) for deployment on commercial fishing gear to observe interactions with the Southern ... Ocean benthos, has a wider application in deep-sea marine research. The use of the system as a drop ... voyage on the shelf-break of East Antarctica, greatly improved the efficiency of selection of sites for ...
Meeting Document : WG-EMM-10/24 : Auteur(s): G.P. Ewing, R. Kilpatrick, A.J. Constable and D.C. Welsford (Australia)
-
Application of aerial photography for ecological survey and habitat management of Adélie penguins
Abstract: There are some limits to the accurate counting of the total number of nests by ground ... survey at large scale breeding sites of penguins. To compensate for these shortcomings of the classical ... method, we tested the effectiveness of aerial photography for penguin monitoring at Cape Hallett. Images ... taken with a drone had a higher resolution than those taken by helicopter, and in the drone images ...
Meeting Document : WG-EMM-18/38 : Auteur(s): J.-H. Kim, H.-C. Kim, J.-I. Kim, C.-U. Hyun, J.-W. Jung, Y.-S. Kim, H. Chung and H.C. Shin
-
Hydroacoustic data obtained around Elephant Island and South Orkney Islands during austral summer 2018
Abstract: This document presents the analysis of acoustic data obtained during the austral summer ... of 2018 as a complement to finfish research in Subareas 48.1 and 48.2 using bottom trawling nets. The ... frequency of 38 kHz and a SIMRAD ES70 fishing echosounder equipped with a 120 kHz frequency transducer. The ... geographical distribution of krill concentrations and the presence of fish shoals are described in an area of ...
Meeting Document : WG-FSA-18/05 : Auteur(s): N.A. Alegría and P.M. Arana
-
Revisiting krill ageing method using eyestalk cuticles
Abstract: The development of a consistent and reproducible ageing method for krill is critical ... for improving the precautionary management of krill fisheries. The only method to date that has shown ... promise in the determination of the absolute age of krill is that of Kilada et al. (2017), which involves ... thin sectioning of the eyestalk cuticle. The mechanisms controlling the generation and retention of ...
Meeting Document : WG-EMM-2019/45 : Auteur(s): S. Kawaguchi, T. Barnes, N. Waller, B. Farmer, D. Hayes, R. Kilada, C. Reiss, G. Zhu, B. Krafft, A.-L. Agnalt, T. Ichii and T. Matsuda
-
Entanglement of Antarctic fur seals (Arctocephalus gazella) in man-made debris at Signy Island, South Orkney Islands, 2004/05
Abstract: The results of the ninth annual survey of entanglement of Antarctic fur seals at Signy ... Island, South Orkney Islands are reported for the 2004/05 summer season. There were two sightings of ... one case the entangling material had become attached to a rock and the animal was tethered to the ... ground. The incidence of entanglement at Signy Island, albeit very low, highlights the need for CCAMLR ...
Meeting Document : SC-CAMLR-XXIV/BG/18 : Auteur(s): Delegation of the United Kingdom