Résultats de la recherche
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Final report of scientific observation of commercial krill harvest aboard the Japanese stern trawler Niitaka Maru, 13 December 2000–26 January 2001
measurements of krill, product types are described in the report. The trawler made an anti-clockwise trip ... around the South Shetland Islands. During this trip, the vessel encountered a swarm rapidly moving ... could not catch in the other locations. The patches seemed to be relatively dispersed compared to the ...
Meeting Document : WG-EMM-01/38 : Auteur(s): T. Hayashi, S. Kawaguchi and M. Naganobu (Japan)
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A simple approach for calculating the potential yield of krill from biomass survey results
results Abstract / Description: Estimates are calculated for the parameter λ in the yield equation Y = λ ... MB 0 for a krill fishery in which both the fishery and krill growth are seasonal. The criterion used ... -structure has been lost. (iv) In year y = 10 (the year before fishing commences), the a+ biomass is ... estimate Bo which is to be used in equation (1) is considered to be made in the middle of the season (Le ... .3) In the middle of the season during which the krin grow, their mass-at-age (w .) is then: wa ... ** Abstract Estimates are calculated for the parameter 'A, in the yield equation Y = 'A,MB 0 for a kriU ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 207–217 : Auteur(s): Butterworth, D.S., A.E. Punt and M. Basson
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Estimating density and biomass of Antarctic krill around South Sheltland Islands using the 2-dB difference method
2016 and 38 and 200 kHz from March 6 to 14 in 2017. Krill were collected by the commercial middle trawl ... estimated using an acoustics survey. Acoustic data were collected with 38 and 120 kHz from April 13 to 24 in ... v difference-3.0-13.8 dB in 2017, respectively. Krill density and biomass were significantly higher ... in 2016 than those in 2017. Author(s): S.-G. Choi, K. Lee and D. An Title: Estimating density and ...
Meeting Document : WG-EMM-17/08 : Auteur(s): S.-G. Choi, K. Lee and D. An
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The use of CCAMLR Statistical Subareas 88.1 and 88.2 and Division 58.4.1 by Macquarie Island giant petrels
summer of 2005-06. Adults of both species spent time in areas under CCAMLR jurisdiction. Adult southern ... giant petrels spent 37% of their overall time at sea in statistical sub-area 58.4.1, and 14% in sub-area ... enter CCAMLR waters, one bird undertook a longer trip into division 58.4.1, where it spent 6% of its ... overall time at sea. We consider it possible that this trip may have been indicative of trips undertaken ...
Meeting Document : WG-FSA-06/49 : Auteur(s): R. Trebilco, R. Gales, B. Baker and A. Terauds (Australia)
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The CCAMLR-2000 Krill Synoptic Survey: a description of the rationale and design
krill which are used in models to estimate sustainable yield in Area 48. The survey design includes two ... large-scale oceanic strata: one in the southwest Atlantic located in the Scotia Sea, and the other to ... these large-scale strata, four mesoscale strata were included in the survey design; these were located ... and the planned cruise tracks for each of the four vessels participating in the survey are shown ... was to improve estimates of the pre- exploitation biomass of krill which are used in models to ... estimate sustainable yield in Area 48. The survey design includes two large-scale oceanic strata: one in ... the southwest Atlantic located in the Scotia Sea, and the other to the north of the Antarctic ... mesoscale strata were included in the survey design; these were located close to the South Sandwich Islands ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 1–23 : Auteur(s): Trathan, P.N., J.L. Watkins, A.W.A. Murray, A.S. Brierley, I. Everson, C. Goss, J. Priddle, K. Reid, P. Ward, R. Hewitt, D. Demer, M. Naganobu, S. Kawaguchi, V. Sushin, S.M. Kasatkina, S. Hedley, S. Kim and T. Pauly
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Seabird research at Cape Shirreff, Livingston Island, Antarctica, 2006/07
mean foraging trip duration during chick- rearing was approximately one hour longer than in 2005-06 ... in interpreting the foraging trip data. Fledgling success and chick fledging mass in 2006-07 were ... Abstract: Our tenth season of seabird research at Cape Shirreff allowed us to assess trends in ... penguin population size, as well as inter-annual variation in reproductive success, diet and foraging ...
Meeting Document : WG-EMM-07/P1 : Auteur(s): R. Orben, S. Chisholm, A. Miller and W.Z. Trivelpiece (USA)
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Do Adélie penguin fledgling weights provide an index of prey availability?
Abstract: We examine fledgling weights measured over 11 years at Béchervaise Island in relation ... to two assumed proxies of prey availability: breeding success and foraging trip duration. Concordance ... between the two proxies was apparent when considering guard stage foraging trip durations but this was not ... as strong for the crèche foraging trips later in the season. Fledgling weights which are measured at ...
Meeting Document : WG-EMM-05/21 : Auteur(s): L. Emmerson, C. Southwell and J. Clarke (Australia)
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Analysis of results from demersal fish surveys at South Georgia, undertaken by the United Kingdom and the USSR, January and February 1990
discussions and analyses of the data from a survey from MV Hill Cove in January 1990 and RV Akademik Knipovich ... in February 1990 around South Georgia. Both surveys were characterized by large numbers of small ... increase in the estimated standing stock of Champsocephalus gunnari. The paper describes the ways in which ... these large hauls were considered in the analysis. No ideal method was found for incorporating the large ... finding the proportion of total swept area covered by the highest density in the middle stratum of ... the density of the haul from station 16, and then by the total seabed area in the middle stratum of ... of previous surveys, the greatest proportion being present in the middle (150 to 250 m) depth 236 ... analyses of the data from a survey from MV Hill Cove in January 1990 and RV Akademik Knipovich in ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 223–254 : Auteur(s): (Report of a Joint UK/USSR Workshop, 23 to 27 July 1990)
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DEVELOPMENT OF A METHODOLOGY FOR DATA QUALITY ASSESSMENT
biological sampling data from a fishing trip. In particular these measures aim to quantify the prevalence of ... assist in assessing which data from a trip should be used in an assessment, and can also guide how these ... is fitted in an assessment model.The data quality measures illustrate sometimes substantial variation ... in the quality of particular data sets from different trips in the Ross Sea Antarctic toothfish ...
Meeting Document : WG-SAM-08/13 : Auteur(s): D.A.J. Middleton and A. Dunn (New Zealand)
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Estimating density and biomass of Antarctic krill (Euphausia superba) around South Shetland using the 2-dB difference method
estimated using an acoustics survey. Acoustic data were collected with 38 and 120 kHz from April 13 to 24 in ... 2016 and 38 and 200 kHz from March 6 to 14 and 38 and 120 kHz on April 27 and May 5 in 2017. Krill were ... and 83 thousand tonnes (CV=31.4%) applying S v difference-3.0-13.8 dB in 2017, respectively. Krill ... density and biomass were significantly higher in 2016 than those in 2017. Author(s): S. Choi, K. Lee and ...
Meeting Document : SG-ASAM-18/08 : Auteur(s): S. Choi, K. Lee and D. An