Résultats de la recherche
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Results of the longline survey for toothfish in the northern Ross Sea region (Subarea 88.2 SSRUs A–B) by the FV Janas, New Zealand
part of a multi-year and multi-member research plan using standardised longline gear to sample ... toothfish populations in the northern areas (60°‑ 66° S) of Subarea 88.2 SSRUs A–B. Sampling strategy and ... data collection adhered to standards set in CM 41-10 (2014). A total of 49.85 t of Antarctic toothfish ... sex-specific Fulton’s condition factor observed in the northern region of SSRU 88.2B were lower than ...
Meeting Document : WG-SAM-15/46 : Auteur(s): S.J. Parker, R.J.C. Currey and S. Mormede (New Zealand)
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Seasonal variation in the diet of Arctocephalus gazella at 25 de Mayo/King George Island, South Shetland Islands, Antarctica
Abstract: The trophic study of Arctocephalus gazella is an essential tool for assessing its ... ecological role as a top predator of the Antarctic marine ecosystem. The aim of this study was to analyse its ... diet during an annual cycle. To our knowledge, this is the first report of the feeding habits of A ... . gazella during the winter period in the South Shetlands area. A total of 224 scats were collected in the ...
Meeting Document : WG-EMM-15/37 : Auteur(s): A. Harrington, G.A. Daneri, A.R. Carlini, D.S. Reygert and A. Corbalán (Argentina)
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Comparison of NASC values calculated by swarm-based and grid-based acoustic data processing methods for Antarctic krill density estimation
Abstract: The one nautical mile integrated Nautical Area Scattering Coefficient (NASC) values of ... -based acoustic data processing methods. All parameter settings were consistent with the reports of SG ... -ASAM-2017 except that the dB difference window of Sv 120 kHz-Sv 38kHz is set 0 to 20 dB. And the two ... groups of results were compared by correlation, linear regression analysis and nonparametric significant ...
Meeting Document : SG-ASAM-18/04 Rev. 1 : Auteur(s): X. Yu, X. Wang and X. Zhao
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An experimental approach for the Antarctic krill fishery: advancing management and conservation through the use of Krill Reference Areas and Krill Fishing Areas
to fishing, coupled with the use of Krill Reference Areas and Krill Fishing Areas. We use the ... characteristics, as the geographic and spatial basis for a set of differing treatments. We also consider the ... mainly associated with penguin research. We identify a number of treatments based on seasonal, or year ... approaches could be used to enhance ecological understanding of possible impacts (or lack thereof) of krill ...
Meeting Document : WS-SM-18/05 : Auteur(s): P.N Trathan and O.R. Godø
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Development of methods relevant to feedback management (FBM) for the krill fishery
environment essential for the implementation of a Feed-Back Management (FBM) system. In terms of FBM, Marine ... . Thus, data supporting FBM as an integral part of the broader management strategies of the krill ... fisheries within Domain 1 are critical if the fishery is to be managed by an empirical understanding of ... during the fishing season as a measure of the available prey field. This information can be integrated ...
Meeting Document : WG-EMM-18/08 : Auteur(s): B.A. Krafft, A. Lowther, G. Macaulay, M. Chierici, M. Biuw, A. Renner, T.A. Klevjer, R. Øyerhamn, C.A. Cárdenas, J. Arata, A. Makhado, C. Reiss and O.A. Bergstad
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Indicative trends in by-catch of sharks in the CAMLR Convention Area
comparison of data from vessels vs. scientific observers. This paper provides information that could be ... Abstract: Conservation Measure 32-18 on the conservation of sharks specifies that “directed ... .” Further, that “any by-catch of sharks shall, as far as possible, be released alive.” Here, we examine ... increased during the last 10-year period, with most of the by-catch reported in Division 58.5.2 and ...
Meeting Document : WG-FSA-18/63 Rev. 1 : Auteur(s): C.D. Jones
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Ageing two myctophid fishes using otolith from king and macaroni penguins in the Marion Island and its implication to feeding preference of penguins on those myctophids
distributed biological resources in the Antarctic waters, which are the important food sources of top ... predators, particularly penguins. However, the information on age of those fishes are very limited and ... of myctophids in the Antarctic ecosystem. Using the otolith samples collected from King and Macaroni ... penguins in the Marion Island, the present study examined the age determination and precision of age ...
Meeting Document : WG-FSA-18/74 : Auteur(s): M. Duan, G.P. Zhu, A. Makhado and L. Wei
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The Continuous Plankton Recorder in the Southern Ocean: a comparative analysis of zooplankton communities sampled by the CPR and vertical net hauls along 140°E
Abstract: A repeat transect was run south of Tasmania, along ~140°E, during November and December ... each of 19 stations: 0–20, 20–50, 50–100 and 100–150 m. A Continuous Plankton Recorder (CPR) was ... . Zooplankton in the top 150 m of the water column demonstrated strong, small-scale, vertical distribution ... , indicating that all communities had a similar distribution of abundance amongst species. There was little ...
Meeting Document : WS-BSO-07/P5 : Auteur(s): Hunt, B.P.V and G. Hosie
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An assessment of toothfish in Subarea 48.3 using CASAL
Abstract: The CASAL software has been successfully applied to an assessment of the stock of ... , with an extensive range of sensitivity tests and examination of diagnostics. A baseline assessment ... 45,893 t, and the spawning stock biomass was estimated to be 120,360 t, around 67% of its unexploited ... 49,943 t, and the spawning stock biomass was estimated to be 100657 t, some 64% of its unexploited level ...
Meeting Document : WG-FSA-05/16 : Auteur(s): R.M. Hillary, G.P. Kirkwood and D.J. Agnew (United Kingdom)
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Milk fatty acid signatures indicate both major and minor shifts in foraging ecology of lactating Antarctic fur seals
Abstract: Fatty acid signature analysis is based on the conservation and unique signatures of ... fatty acids in the marine food chain and it may be useful in determining the composition of seal diets ... perinatal fast are derived largely from blubber mobilization and thus likely resemble an integration of ... the lactation period. To compare groups, we used methods of classification and regression tree (CART ...
Meeting Document : WG-EMM-97/14 : Auteur(s): Boyd, I.L., Iverson, S.J., Arnould, J.P.Y.