Search results
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Stock connectivity of Antarctic toothfish
, 48.4, 48.6, 88.1, 88.2 and 88.3, Divisions 58.4.1, 58.4.2 and 58.5.2, and the SPRFMO area north of ... be sequenced by Diversity Arrays to identify variable nucleotide SNPs sites. The analysis of SNPs ... indicated that the genetic structuring of Antarctic toothfish across the Southern Ocean is very weak. The ... sampled toothfish shared over 99.9% of the observed variation between sites. While some genetic ...
Meeting Document : WG-FSA-2019/P01 : Author(s): D. Maschette, S. Wotherspoon, A. Polanowski, B. Deagle, D. Welsford and P. Ziegler
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Short note on time series of Drake Passage Oscillation Index (DPOI) and its influence on environmental variability
Abstract: An assessment of the environmental processes influencing variability in the recruitment ... affects the Antarctic marine ecosystem as a whole. Naganobu et al. (1999) had assessed variability in ... krill recruitment and density in the Antarctic Peninsula area with an environmental factor; strength of ... westerly winds (westerlies) determined from sea-level pressure differences across the Drake Passage ...
Meeting Document : WG-EMM-07/14 : Author(s): M. Naganobu and K. Kutsuwada (Japan)
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Fishing equipment, marine debris and oil associated with seabirds at Bird Island, South Georgia, 2003/04
associated with seabirds at Bird Island, South Georgia from 1 April 2003 to 31 March 2004. It is the eleventh ... found in association with wandering albatrosses than with any other species, although the number has ... decreased substantially since last year. Grey-headed albatross collected the highest number of marine debris ... items, mostly small plastic fragments, of the study species. The quantity of fishing gear and ...
Meeting Document : SC-CAMLR-XXIII/BG/16 : Author(s): Delegation of the United Kingdom
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Marine debris and fishing gear associated with seabirds at sub Antarctic Marion Island – 1998/99
Abstract: Most (52%) of the 306 debris items found in association with seabirds at Marion Island ... , during the season May 1998 to April 1999, originated from the fishing industry. The most common items ... found were rope nooses (79) and fishing hooks (28), both originating from the Patagonian toothfish ... Dissostichus eleginoides longline industry. Wandering albatrosses Diomedea exulans took the highest proportion ...
Meeting Document : SC-CAMLR-XVIII/BG/14 : Author(s): Delegation of South Africa
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Echo integration in low signal to noise regimes: methods of noise estimation and removal
Abstract: The results of acoustic surveys, especially in low signal-to-noise regimes, are ... sensitive to the method used to exclude the contribution of background noise from the acoustic data. The use ... of thresholds to reject weak signals during data collection is inappropriate because the noise ... contribution to the above-threshold-signal cannot later be removed in post processing. The only solution is to ...
Meeting Document : WG-EMM-97/74 : Author(s): Higginbottom, I., Pauly, T.
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Habitat preferences of Adélie and chinstrap penguins during pre-moult
Abstract: In order to understand and mitigate for the potential impacts of anthropogenic ... disturbance on marine predators it is fundamental to gain insight into the drivers behind the temporal ... ) devices to track Adélie and chinstrap penguins breeding on the South Orkney Islands during the pre-moult ... phase of the annual cycle. We show that Adélie penguins have an affinity to forage and moult on sea-ice ...
Meeting Document : WG-EMM-18/P12 : Author(s): V. Warwick-Evans, M. Santos and P.N. Trathan
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JAPANESE SCIENTIFIC OBSERVER ACTIVITIES FOR KRILL FISHERY IN CCAMLR CONVENTION AREA FROM 2003/04 TO 2007/08 FISHING SEASONS
Abstract: This document introduces the recent activities and outcome of Japanese scientific ... observers onboard the commercial krill fishing vessel from 2003/04 to 2007/08 fishing seasons. Main fishing ... grounds of the Japanese fishery were the Subareas 48.1, 48.2, and 48.3. Recent observation effort was ... concentrated to the Subarea 48.3. The observer coverage was 32.2 – 51.4 %, and exceeded 50 % in 2007/08 season ...
Meeting Document : WG-EMM-09/19 : Author(s): M. Kiyota and T. Iida (Japan)
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IDENTIFICATION OF DATA QUALITY METRICS FOR TAGGING DATA SELECTION
Abstract: The suite of data quality metrics introduced by Middleton & Dunn (2008) is examined ... to identify those metrics that are most informative with respect to the identification of good ... rates of recapture of tags released by the trip, and above-median tag recapture rates by the trip.A ... bootstrap analysis indicates that the range of data quality metrics associated with known good tagging data ...
Meeting Document : WG-SAM-09/19 : Author(s): D.A.J. Middleton and A. Dunn (New Zealand)
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Short note: Time series of Drake Passage Oscillation Index (DPOI) during 1952-2008 and its possible influence on environmental variability
Abstract: An assessment of the environmental processes influencing variability in the recruitment ... affects the Antarctic marine ecosystem as a whole. Naganobu et al. (1999) had assessed variability in ... krill recruitment and density in the Antarctic Peninsula area with an environmental factor; strength of ... westerly winds (westerlies) determined from sea-level pressure differences across the Drake Passage ...
Meeting Document : WG-EMM-08/33 : Author(s): M. Naganobu, J. Kondo and K. Kutsuwada (Japan)
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Pup production and distribution of breeding Antarctic fur seals (Arctocephalus gazella) at South Georgia
Abstract: A census of the breeding population of Antarctic fur seals (Arctocephalus gazella) at ... South Georgia was carried out during the 1990/91 breeding season. Using counts of adult females ashore ... at the breeding grounds during the pupping period, together with corrections for the likelihood of a ... 269,000 (95% confidence intervals 188,000- 350,000). The breeding population in 1990/91 was reduced at ...
Meeting Document : WG-CEMP-92/39 : Author(s): I.L. Boyd (United Kingdom)