Resultados de la búsqueda
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Conflict or co-existence? Foraging distribution and competition for prey between Adélie and chinstrap penguins
, their foraging distribution and diet were studied during the chick-rearing period at Signy Island, South ... Orkney Islands during the breeding seasons of 2000 and 2001. Satellite tracking data from of 19 Adélie ... penguins and 24 chinstrap penguins were used to compare foraging distributions. In both years the diet of ... both species was exclusively Antarctic krill (Euphausia superba) of the same size range. In a year of ...
Meeting Document : WG-EMM-02/15 : Autor(es): A.S. Lynnes, K. Reid, J.P. Croxall and P.N. Trathan (United Kingdom)
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Research plan for toothfish in Division 58.4.4a & b by Shinsei Maru No. 3 in 2013/14
Abstract: We made stock status assessments of Dissostichus eleginoides in SSRUs C and D in ... stating that the sensitivity run of the CASAL model should be made by using levels of IUU ranging from ... CASAL_base model includes estimated variability of YCS for the period from 1989 to 2005, and assumed that a ... quarter of observed IUU fishing in the division had occurred in SSRU C. High estimated stock levels were ...
Meeting Document : WG-SAM-13/21 : Autor(es): Delegation of Japan
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Revised assessment models for Patagonian toothfish in research block 58.4.4b_1 (SSRU 58.4.4bC) for the years 1990–2014
Abstract: We presented five sensitive runs of single-sex age-structured CASAL models for stock ... status assessments of Dissostichus eleginoides in the research block 58.4.4b_1 in the last WG-SAM meeting ... included all observations. The Working Group, however, requested the further examination of the sensitivity ... consequences of different harvest levels for the time to recovery to the target level. We revised to retain tag ...
Meeting Document : WG-FSA-15/23 : Autor(es): K. Taki (Japan), S. Mormede (New Zealand) and T. Ichii (Japan)
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Habituation to an acoustic harassment device (AHD) by killer whales depredating demersal longlines
return of initial depredation behaviour strongly suggests that AHDs are ineffective at deterring ... fisheries that suffer significant losses caused by odontocete depredation. However, the efficacy of AHDs to ... deter odontocetes from fishing gear remains poorly investigated. To determine the effectiveness of AHDs ... distances of 29 killer whales from the vessel (n = 1,812 records) were collected during 45 phases of AHD ...
Meeting Document : WG-FSA-14/P04 : Autor(es): P. Tixier, N. Gasco, G. Duhamel and C. Guinet
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Observer notes (Subarea 88.1)
Abstract: Results of biological data analysis of Antarctic fish species from catches of 117 ... Antarctic toothfish was found in long-line catches above seamounts of the Pacific-Antarctic Ridge to the ... North up to 56°S. Presence of Patagonian toothfish in spawning aggregations of Antarctic toothfish ... cannot lead to their intbreeding as its gonads were at the early development stages in that period ...
Meeting Document : WG-FSA-04/89 : Autor(es): V.G. Prutko (Ukraine)
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ENCOUNTERS WITH VULNERABLE MARINE ECOSYSTEMS IN THE CONVENTION AREA
58.4.1 or 58.4.2 at the time of writing this report. Author(s): Secretariat Title: ENCOUNTERS WITH ... of seven risk areas in Subareas 88.1 and 88.2, and one VME FS rectangle was identified in Subarea ... 88.2. In addition, the Secretariat has received 30 notifications of encounters with VMEs during the ... course of research surveys conducted by the U.S.A. in Subarea 48.1 (17 notifications, seafloor depth 92 ...
Meeting Document : WG-EMM-09/08 : Autor(es): Secretariat
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Reports on abundance and biological information on toothfish in Divisions 58.4.4a and 58.4.4b by Shinsei Maru No. 3 in 2011/12 season
. A total of 133 killer whales (Orcinus orca) were observed at the 30 hauls. All of whales observed ... during the survey in two SSRUs (B & C) of Ob Lena Bank. Total catch (excluding tagged and released ... fish) of Dissostichus eleginoides was 28.3 tonnes in the survey area in 70 longline sets, contributing ... 91.3 % to the total fish catch (31 tonnes). Mean CPUEs of D. eleginoides was in the SSRUs were 6.7 ...
Meeting Document : WG-SAM-12/16 : Autor(es): K. Taki, T. Iwami, M. Kiyota and T. Ichii (Japan)
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Monitoring Antarctic toothfish (D. mawsoni) recruitment in the southern Ross Sea
annual surveys have been conducted at a similar time of the year. The surveys caught mainly 70–110 cm ... Abstract: Knowledge of recruitment dynamics, and in particular trends in recruitment and ... recruitment variability, are key inputs for integrated assessments of fish stocks. A quantitative longline ... survey monitoring the recruitment of Antarctic toothfish (Dissotichus mawsoni) in the southern Ross Sea ...
Meeting Document : WG-FSA-17/57 : Autor(es): S.M. Hanchet, S. Mormede, S. Parker, K. Large, A. Dunn and B. Sharp
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Assessment models for Antarctic toothfish (Dissostichus mawsoni) in Subarea 88.2 SSRUs 88.2C–G for the years 2002–03 to 2010–11
at 544 t, slightly lower than the combined current catch limits for the region of 575 t. We examined ... assessment model of Antarctic toothfish (Dissostichus mawsoni) in Subarea 88.2 covering SSRUs 88.2C, D, E, F ... , and G (SSRUs 88.2C–G). For modelling purpose, we split the region into two fisheries: south of 70.2° S ... where smaller fish are typically caught and effort has been light; and north of 70.2° S where larger ...
Meeting Document : WG-FSA-11/43 : Autor(es): S. Mormede, A. Dunn and S.M. Hanchet (New Zealand)
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The Patagonian toothfish: biology, ecology and fishery
habitat at around 100 mm (1 yr old), and inhabit relatively shallow water (< 200m) until 6-7 years of ... and slopes of South America and around the sub-Antarctic islands of the Southern Ocean. Patagonian ... scavengers, there is no evidence of large-scale geographic migrations and studies using genetics ... , biochemistry, parasite fauna and tagging indicate a high degree of isolation between populations in the Indian ...
Meeting Document : WG-FSA-10/P05 : Autor(es): M.A. Collins, P. Brickle, J. Brown and M. Belchier