Résultats de la recherche
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RESEARCH PLAN FOR TOOTHFISH IN DIVISION 58.4.4a & b BY SHINSEI MARU NO. 3 IN 2009/10
Division 58.4.4 a & b, a total of 124 research hauls are allocated on 10-minute latitude x 20-minute ... shallow points of < 500 m in SSRU A in order to avoid catching small fishes. A Trot line system will be ... utilities of the data and reducing uncertainties. In 31 hauls (a quarter of total sets), the experimental ...
Meeting Document : WG-SAM-09/11 : Auteur(s): Delegation of Japan
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Interannual changes in body fat condition, stomach content mass and distribution of minke whales in Antarctic Areas IV and V
-edge zone suggests that girth can be a useful indicator of food availability. In Areas IV and V, krill ... . crystallorophias was the dominant prey species. Distribution of minke whales showed a greater interannual ... variability in Area V than in Area IV, reflecting a greater degree of variability in sea-ice extent in Area V ... . In Area V, in a year of high sea-ice extent, the krill-rich slope region in the western zone was ...
Meeting Document : WG-EMM-97/18 : Auteur(s): Ichii, T., Nishiwaki, S., Tamura, T., Fujise, Y., Matsuoka , K.
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An assessment of longlining operations for Dissostichus eleginoides on board the Chilean-registered longliner BF Cisne Verde during March–May 1997 around South Georgia (Subarea 48.3)
Abstract: Long-lining operations from a single vessel fishing for Dissostichus eleginoides off ... extinguished to mitigate against bird mortality. Data were recorded during hauling using a randomised cluster ... sampling method; the known number of coils laid during a night's setting operations provided the ... . Previous catch rates were used to set daily sampling effort, and accurately achieved a CCAMLR sampling ...
Meeting Document : WG-FSA-97/41 : Auteur(s): Ashford, J.R., Everson, I.
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Krill (Euphausia superba) distribution in relation to water movement and phytoplankton distribution off the northern South Shetland Islands
is that one buoy traveled all the way to South Georgia and has been being trapped in a winter fishing ... ground for krill.) High concentrations of chlorophyll a were also measured in the shelf waters, showing a ... spatial correlation between krill and chlorophyll a distributions. It is therefore considered that both ... hydrodynamic and food environments may accumulate krill. a regular fishing ground on the northern shelf of ...
Meeting Document : WG-KRILL-91/22 : Auteur(s): Delegation of Japan
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Report on bottom fisheries and vulnerable marine ecosystems: draft template and workplan
Abstract: The WG-FSA Subgroup on VMEs was tasked with providing a draft template of a Report on ... Vulnerable Marine Ecosystems to WG-EMM and WG-FSA in 2010. This paper provides a draft template, including ... Scientific Committee and its working groups have been embedded within this structure in order to give them a ... arise from WG-FSA. It is envisaged that, following comments by WG-EMM, a draft report will be generated ...
Meeting Document : WG-EMM-10/15 : Auteur(s): WG-FSA Subgroup on VMEs
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At-sea distribution and diet of an endangered top predator: links of white-chinned petrels with commercial longline fisheries
Abstract: Incidental seabird mortality associated with longline commercial fishing is a worldwide ... that at a large scale spatial and temporal overlap occurred and varied among areas and with breeding ... stage. Dynamic analysis (detection for each bird location of any operating vessel within a time/space ... window) revealed few overlap at a small scale. Our study revealed a mismatch between large and small ...
Meeting Document : WG-FSA-10/P01 : Auteur(s): K. Delord, C. Cotté, C. Péron, C. Marteau, P. Pruvost, N. Gasco, G. Duhamel, Y. Cherel and H. Weimerskirch
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The development of spatially and temporally controlled measures of survival and tag-detection for the CCAMLR tagging program
Abstract: A reliable commercial tagging program is critical to the successful assessment and ... management by CCAMLR of a number of toothfish fisheries in Antarctica. The evaluation of the tagging ... programme relies on two key aspects (i) that the tagged fish have a good chance of survival and (ii) that ... . We propose that, by controlling for the spatial and temporal confounding factors using a case-control ...
Meeting Document : WG-SAM-12/30 : Auteur(s): S. Mormede and A. Dunn (New Zealand)
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Trophic interactions and population trends of killer whales (Orcinus orca) in the southern Ross Sea
Sea killer whales (Type-C; RSKWs), a fishing-eating ecotype, has continued to decrease in a pattern ... coincident with a decrease in the number and size of an important prey: Antarctic toothfish (Dissostichus ... important to the whales, a relationship with potential parallels to that known between well-studied fish ... reliable, enhanced foraging opportunities as prey are exposed one area at a time during summer. Given the ...
Meeting Document : WG-FSA-12/P03 : Auteur(s): D.G. Ainley and G. Ballard
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Using outputs from spatial population models of Antarctic toothfish in the Ross Sea region to investigate potential biases in the single population model
Abstract: We present a method to evaluate potential biases and uncertainty in the tagging ... were then used in a single area stock assessment model derived from the stock assessment model of ... historical footprint of the fishery. However, the results when using a similar model that allowed for fish to ... provide a useful tool to evaluate potential bias and uncertainty in our understanding of the stock ...
Meeting Document : WG-FSA-12/45 : Auteur(s): S. Mormede and A. Dunn (New Zealand)
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Quantifying vessel performance in the CCAMLR tagging program: spatially and temporally controlled measures of relative mortality and tag-detection rates
Abstract: A reliable commercial tagging program is critical to the successful management by ... CCAMLR of a number of toothfish fisheries in Antarctica, but the evaluation of tagging performance has ... , by controlling for the spatial and temporal confounding factors using a case-control study design, we ... haul. This method is a good candidate to investigate the relative performance of the CCAMLR tagging ...
Meeting Document : WG-FSA-12/47 Rev. 1 : Auteur(s): S. Mormede and A. Dunn (New Zealand)