Résultats de la recherche
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Beach litter accumulation at sub-Antarctic Marion Island – 1998/99
accumulation studies, showed a substantial decrease from the peak experience during 1997/98 season, but is ... still double that recorded during 1984. This recent decrease was mainly due to a decrease in the number ... the most prevalent, followed by items with oriental script. Monthly accumulation studies showed a ...
Meeting Document : CCAMLR-XVIII/BG/22 : Auteur(s): Delegation of South Africa
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Seabird by-catch in the Patagonian toothfish longline fishery at the Prince Edward Islands: 1997–1998
observers aboard all 11 sanctioned fishing trips, representing a fishing effort of 4.3 million hooks. This ... during 1997-98 as a result of a decrease in the number of unsanctioned vessels operating in the area ...
Meeting Document : WG-FSA-98/42 : Auteur(s): P.G. Ryan and M.G. Purves (South Africa)
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IMPROVING ESTIMATES OF ADÉLIE PENGUIN BREEDING POPULATION SIZE: DEVELOPING FACTORS TO ADJUST ONE-OFF POPULATION COUNTS FOR AVAILABILITY BIAS
their breeding sites during the breeding period are strongly dependent on the timing within a breeding ... times within a breeding season to minimise bias in estimates of the breeding population has long been ... the collection of adjustment data to improve estimation of penguin abundance was identified as a ...
Meeting Document : WG-EMM-09/38 : Auteur(s): C. Southwell, J. McKinlay, L. Emmerson, R. Trebilco and K. Newbery (Australia)
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ACCURACY OF BENTHIC INVERTEBRATE BY-CATCH IDENTIFICATION BY OBSERVERS OPERATING IN THE HEARD ISLAND AND MCDONALD ISLANDS PATAGONIAN TOOTHFISH LONGLINE FISHERY
Abstract: As a means of testing the accuracy of observer identifications and to provide ... Antarctic Chieftain were asked to identify and retain all benthic invertebrate by-catch from a recent voyage ... Antarctic Division (AAD). Observers displayed a high level of accuracy (89%) in the identification of ...
Meeting Document : WG-FSA-09/23 : Auteur(s): T. Hibberd (Australia)
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ANTARCTIC-WIDE GEOMORPHOLOGY AS AN AID TO HABITAT MAPPING AND LOCATING VULNERABLE MARINE ECOSYSTEMS
data can also be used to map likely locations for some Vulnerable Marine Ecosystems. Seamounts over a ... shown to provide a guide to the distribution in the area of the shelf benthic communities recognised by ... Gutt (2007). The geomorphic mapping method presented here provides a layer to add to benthic ...
Meeting Document : WS-VME-09/10 : Auteur(s): Romeyn, R., O’Brien, P.E., Post, A.L.
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LENGTH-BASED ASSESSMENT FOR THE MACKEREL ICEFISH (CHAMPSOCEPHALUS GUNNARI) IN SUB-AREA 48.3
numbers forward under the given harvest control rule to set a two-year TAC. One issue is the accurate ... at Shag rocks and around South Georgia. In this paper we propose a length-based approach that removes ... data, yield an estimate of the population numbers-at-length. A length-based population projection is ...
Meeting Document : WG-SAM-09/15 : Auteur(s): R.M. Hillary, D.J. Agnew and R. Mitchell (United Kingdom)
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FISHING EQUIPMENT, MARINE DEBRIS AND HYDROCARBON SOILING ASSOCIATED WITH SEABIRDS AT BIRD ISLAND, SOUTH GEORGIA, 2007/2008
chrysostoma and black-browed albatrosses T. melanophrys. Despite increased observer effort, a slight decrease ... non-fatal entanglements involving a wandering albatross and a northern giant petrel Macronectes halli ...
Meeting Document : WG-FSA-08/25 : Auteur(s): D. Fox (UK)
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Development of an underwater setting method for surface longliners, to minimise the accidental capture of seabirds
concept being a towed paravane with an endless cable employed to transport and release the bait at the ... abandoned. The second concept being a transportation capsule which clamps the baited snood until the capsule ... this device proved successful with a 100 percent bait release rate achieved. Author(s): Bentley, N ...
Meeting Document : WG-FSA-97/54 : Auteur(s): Bentley, N., Smith, M.
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Geographical aspects of utilising resources of krill (Euphausia superba)
. In a number of subregions on the periphery of the Weddell Gyre (both to the north and south), as well ... in terms of location of individual aggregations. The main difficulty with starting up a fishery there ... knowledge about this variability. This process must be undertaken alongside a program of integrated research ...
Meeting Document : WG-EMM-96/05 : Auteur(s): Makarov, R.R.
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Conditions for the precise measurement of fish target strength in situ
reverberation volume which contributes echo formation at a certain instant and the other is the percentage of ... the multiple echoes which is derived from a residual of the single echo extraction. With the decrease ... of both indexes measured target strength approach a certain asymptotic value which is admitted as ...
Meeting Document : WG-Krill-94/35 : Auteur(s): K. Sawada and M. Furusawa (Japan), N.J. Williamson (USA)