Search results
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The role of fish in the Antarctic marine food web: differences between inshore and offshore waters in the southern Scotia Arc and west Antarctic Peninsula
Abstract: The role of fish in the Antarctic food web in inshore and offshore waters is analysed ... taking as an example the coastal marine communities of the southern Scotia Arc (South Orkney Islands and ... South Shetland Islands) and the west Antarctic Peninsula. Inshore, the ecological role of demersal fish ... feed on zooplankton (mainly krill in summer), and are links between lower and upper levels of the food ...
Meeting Document : WG-FSA-02/6 : Author(s): E. Barrera-Oro (Argentina)
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DISCRIMINATION OF ENVIRONMENTAL VARIABLES THAT INFLUENCE THE CATCH PER UNIT EFFORT: THE CASE OF THE ANTARCTIC KRILL FISHERY
Abstract: The use of the catch per unit effort (CPUE) as an index of abundance usually requires a ... from the CPUE time-series. These exogenous factors include those generated by modifications in fishery ... vessel efficiency, variations in fishing strategies, and environmental fluctuations. The selection of the ... latter has been considered to be one of the most difficult, arbitrary, and poorly documented stages since ...
Meeting Document : WG-EMM-11/P3 : Author(s): J.C. Quiroz, R. Wiff, M.A. Barrientos and F. Contreras
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The random stratified trawl survey to estimate the abundance of Dissostichus eleginoides and Champsocephalus gunnari in the waters of Heard Island (Division 58.5.2) for 2016
Abstract: The annual random stratified trawl survey (RSTS) of 2016 at HIMI was conducted during ... April, with the completion of 163 stations. The survey was conducted for the second year on the FV Atlas ... Cove. Sampling protocols such as the design and the duration of the hauls were similar to last year’s ... survey, but with a new set of randomly selected station points. The calculated density of D. eleginoides ...
Meeting Document : WG-FSA-16/23 : Author(s): G.B. Nowara, T.D. Lamb and D.C. Welsford
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Long-term forecast of the conditions of krill (Euphausia superba Dana) fisheries in the Antarctic part of the Atlantic Ocean
Abstract: There have been revealed possibilities for the long-term forecast of CPUE for the ... Antarctic krill (tones per hour) as the major indicator of its abundance and density of concentrations in ... the area of South Shetland and South Orkney Islands as well as South Georgia applying the following ... factors: average annual level of solar activity, speed of the Earth rotation and its derivatives ...
Meeting Document : WG-EMM-07/15 : Author(s): V.A. Bibik and V.A. Bryantsev (Ukraine)
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Krill distribution patterns in the Atlantic sector of the Antarctic during the CCAMLR-2000 Survey
Abstract: The international CCAMLR Survey 2000 was conducted to support an updated estimate of ... the large scale krill biomass in the South Atlantic Sector of the Antarctic. Four vessels from Japan ... , Russia, the UK and the USA participated in the study during which 22 parallel hydroacoustic transects as ... midnight and midday stations. Additional samples were take by opening-closing nets for the identification ...
Meeting Document : WG-EMM-00/6 Rev. 1 : Author(s): V. Siegel (Germany), S. Kawaguchi (Japan), F. Litvinov (Russia), V. Loeb (USA) and J. Watkins (United Kingdom)
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Scientific background document in support of the development of a CCAMLR MPA in the Weddell Sea (Antarctica) – Version 2017 – Reflection of the recommendations by WG-EMM-16 and SC-CAMLR-XXXV
Abstract: The CCAMLR Scientific Committee in 2016 reviewed three scientific background documents ... in support of the development of a CCAMLR MPA in the Weddell Sea. Germany was asked to carry out ... further work, in particular regarding the issues and questions raised at WG-EMM-16 and SC-CAMLR-XXXV. Here ... , the authors intend to update the Working Group on Fish Stock Assessment on the current state of the ...
Meeting Document : WG-FSA-17/29 : Author(s): K. Teschke, H. Pehlke and T. Brey
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Variants of the ASPM assessment of the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity which attempt to reconcile CPUE and catch-at-length data
Abstract: Two variants of the ASPM assessment of the Prince Edward Islands toothfish resource are ... examined. One allows for the possibility of changes in somatic growth rate in response to increased food ... availability as resource abundance drops. The other permits annual fluctuations about a deterministic stock ... -recruitment relationship. A fit of the first variant yields the biologically implausible result of a decrease ...
Meeting Document : WG-FSA-SAM-04/12 : Author(s): Brandão, A., Butterworth, D.S.
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How trophic dynamics of adult Antarctic krill Euphausia superba responses to the condition of no ice in the water during the winter: a case study at South Georgia?
Abstract: Understanding the variation in krill diet during winter is crucial to elucidate the ... overwintering of krill in the Southern Ocean. The information on trophic variation of krill under ice-free ... waters during the winter can also provide the insight for understanding the response of krill to global ... warming. Stable isotope analyses (15 N/ 14 N and 13 C/ 12 C) were utilized to explore the variation in ...
Meeting Document : WG-EMM-2019/P04 : Author(s): G.P. Zhu, H.T. Zhang, B. Deng and Q.Y. Yang
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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
2001. NORPAC nets were deployed during a CTD transect on the southern leg, sampling four depth zones at ... deployed on the northern leg (average sampling depth = 10.5 m). Both net systems were harnessed with 270?m ... mesh and all sampling was conducted between 47°S and the Southern Polar Front (S-PF) at ~61°S ... . Zooplankton in the top 150 m of the water column demonstrated strong, small-scale, vertical distribution ...
Meeting Document : WS-BSO-07/P5 : Author(s): Hunt, B.P.V and G. Hosie
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Results of the fourth CCAMLR sponsored research survey to monitor abundance of sub-adult Antarctic toothfish in the southern Ross Sea, February 2015 and further development of the time series
Abstract: At its 2011 meeting, the Scientific Committee agreed that a time series of relative ... abundance from a well-designed survey could be a useful input into the Ross Sea stock assessment model. The ... the fourth survey in the time series. The objectives of this survey were: (1) To carry out a longline ... survey to monitor sub-adult toothfish in the southern Ross Sea (strata A–C) using standardised gear in a ...
Meeting Document : WG-SAM-15/44 : Author(s): S.M. Hanchet, B.R. Sharp, S. Mormede, S.J. Parker (New Zealand) and M. Vacchi (Italy)