Search results
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A study on calibration for commercial echosounder using the bottom backscattering strength from a fishing vessel near the South Shetland Islands in Antarctic
fishing vessel to use it in estimating biomass of Antarctic krill (Euphausia superba). The method of ... calibration was to analyze the difference between the bottom backscattering strength of the commercial ... , was examined to verify the calibration result. The analysis result confirmed the possibility of ... calibration by bottom backscattering strength, since the proportion of krill swarm signals within 2 dB < S ...
Meeting Document : WG-EMM-16/61 : Author(s): Delegation of the Republic of Korea
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Killer whale Orcinus orca and sperm whale Physeter macrocephalus interactions with longline vessels in the Patagonian toothfish fishery at South Georgia, South Atlantic
longline fishing operations were recorded by CCAMLR (Commission for the Conservation of Antarctic Marine ... deployed in depths of 300 to 2000m, concentrated along the 1000m contour. Sperm whales were the most ... abundant marine mammals observed in the vicinity of vessels when lines were being hauled, occurring during ... 24% of hauling observations. Killer whales, the second most sighted, occurred at 5% of haul ...
Meeting Document : WG-FSA-03/27 : Author(s): M.G. Purves (United Kingdom), D.J. Agnew (United Kingdom), E. Balguerías (Spain), C.A. Moreno (Chile) and B. Watkins (South Africa)
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CCAMLR fisheries: 2007 update
Abstract: Information on CCAMLR fisheries of relevance to the work of WG-FSA is summarised ... , including availability of data, data-related developments in 2006/07, validation of CASAL files, catches in ... information can be found in WG-FSA-07/6, 07/7, 07/8 and 07/9 (summaries of observer data), SC-CAMLR-XXVI/BG/1 ... (catches in the Convention Area) CCAMLR-XXVI/12 (summary of notification for new and exploratory fisheries ...
Meeting Document : WG-FSA-07/4 : Author(s): Secretariat
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Champsocephalus gunnari Lönnberg distribution on South Georgia shelf from inventory survey data collected by AtlantNIRO
Abstract: A total of 8 inventory trawling surveys of the bottom fish were made on South Georgia ... north-eastern parts of the island shelf. Near Shag Rocks they could be seen in separate years. Year-to ... -year fluctuations of catch per unit effort, predominance of certain groups of specimens and mean weight ... of the fish were obviously governed by the intensity of fishing. Author(s): I.A. Trunov (Russia ...
Meeting Document : WG-FSA-92/04 : Author(s): I.A. Trunov (Russia)
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Beach debris survey – Main Bay, Bird Island, South Georgia 1999/2000
Abstract: During the tenth year of standardised beach surveys of man-made debris at Bird Island ... , South Georgia, a total of 408 items was collected. This represents a 92% increase on the total of 213 ... increase (310%) in the number of items collected over winter (April- September) from 41 items in 1998/99 to ... 168 items in 1999/2000 and a 40% increase in the number of items collected during summer reflect a ...
Meeting Document : SC-CAMLR-XX/BG/02 : Author(s): Delegation of the United Kingdom
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Environmental variability effects on marine fisheries: four case histories
Abstract: The changing nature of marine fisheries requires management approaches that recognize ... and include ecosystem and environmental effects. Therefore, we review some examples of exploited ... distribution of the stock. Four examples, ranging from Antarctic krill to oysters, are given that clearly ... strategies for exploited fisheries must include effects of environmental variability. In particular ...
Meeting Document : WG-EMM-97/66 : Author(s): Hofmann, E.E., Powell, T.M.
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Beach debris survey – Main Bay, Bird Island, South Georgia, 2001/02
Abstract: During the twelfth year of standardised beach surveys of man-made debris at Bird Island ... , South Georgia, a total of 193 items was collected, 140 during summer and 53 during winter. This ... represents a 33 % decrease on the total of 290 items recorded in 2000/01 and the lowest level of summer beach ... year. The 2001/02 season was characterised by a dramatic decrease in the proportion of nylon line ...
Meeting Document : SC-CAMLR-XXII/BG/10 : Author(s): Delegation of the United Kingdom
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Statistical problems in krill stock hydroacoustic assessments
Abstract: Two primary issues are at question for hydroacoustic assessments of krill, The first is ... accuracy of target-strength measurements. In the case of statistical methods, there are no clear guidelines ... techniques. However, this does not invalidate the use of available methods to conduct surveys and analyze ... results. In the case of target-strength accuracy, even if the present values were very accurate, the issue ...
Meeting Document : SC-CAMLR-VII/BG/22 : Author(s): United States of America
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Beach litter accumulation and retention at sub-Antarctic Marion Island: trends in relation to longline fishing activity
1998 are reported, and compared to surveys done in 1984 and 1995, prior to the onset of unregulated ... while fishing equipment also doubled during this period. An increase in the number and proportion of ... Spanish script items was noted, while French items only appeared after the onset of illegal fishing ... . Monthly accumulation showed a strong seasonal effect, which also corresponded to periods of reported ...
Meeting Document : CCAMLR-XVII/BG/25 : Author(s): Delegation of South Africa
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Implementing plausible ecosystem models for the Southern Ocean: an ecosystem, productivity, ocean, climate (EPOC) model
statistical language to help explore topical issues on Antarctic marine ecosystems, including impacts of ... climate change, consequences of over-exploitation, conservation requirements of recovery and interacting ... be used to facilitate the development of plausible ecosystem models for evaluating management ... procedures for krill following the recommendations of the workshop held by WG-EMM in 2004. EPOC has been ...
Meeting Document : WG-EMM-05/33 : Author(s): A.J. Constable