Resultados de la búsqueda
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Fishery Report 2013: Champsocephalus gunnari South Georgia (Subarea 48.3)
for the second year of an assessment period (e.g. 2013) are therefore always lower than those for the ... gunnari) grow rapidly to a maximum size of 55 cm, reaching a marketable size of 30 cm in three years ... . 3. Currently the fishing activity in Subarea 48.3 focuses on an area to the northwest of South ... occasionally small numbers of seabirds are caught. In recent years the catch limit for this fishery has been ...
Document : Site Section: Publications
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Analysis of scientific observer data from the Saga Sea 2006–2007
not create an ideal sampling environment for comparing the performance of the two types of trawls ... catch rates of larval fish on the Saga Sea are similar to those reported for conventional trawls. Author ... Sea from June 2006 to June 2007. This paper presents an initial analysis of the krill and fish bycatch ... for a number of weeks or months before changing, for operational reasons to the other type. This did ...
Meeting Document : WG-EMM-07/16 : Autor(es): P. Orr, J. Hooper, D. Agnew, J. Roe, G. Doherty and A. Pryor
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Movements of tagged Antarctic toothfish (Dissostichus mawsoni) in Subarea 48.6 in relation to stock structure hypotheses
Abstract: We examined movements of tagged Antarctic toothfish (Dissostichus mawsoni) for subarea ... (Söffker et al., 2018). Meanwhile, no migrations of tagged fish between northern seamounts (research blocks ... feeding grounds, respectively, have been observed to date. The lack of tag movement between the two areas ... northern seamount area and shelf area. Therefore, population dynamic modelling approach developed for the ...
Meeting Document : WG-FSA-2019/05 : Autor(es): T. Ichii, M. Okazaki, T. Okuda and S. Somhlaba
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Integration of CPUE data into assessments using the Generalised Yield Model
/ Description: For the last three years, CCAMLR's Working Group on Fish Stock Assessment (WG-FSA) has ... the use of importance sampling, for incorporating information on trends in standardised CPUEs into GYM ... into assessments using the Generalised Yield Model (GYM). In this paper, we propose a method, based on ... assessments. The use of the method is illustrated using data for Patagonian toothfish (Dissostichus ... Group on Fish Stock Assessment (WG-FSA) has had available to it two indicators of stock status for ... for fishable biomass, but in two years (1996 and 1997), they fall just outside. The second proposed ... terms of an application of importance sampling, and for providing guidance on appropriate diagnostics ... . We also thank Tony Smith and an anonymous referee for their comments on the manuscript. Geoff ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 65–74 : Autor(es): Kirkwood, G.P. and A.J. Constable
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Annual changes in species composition and abundance of myctophid fish in the north of South Georgia (Subarea 48.3), Antarctica, during austral winters from 2002 to 2008
samples collected by scientific observers on board Japanese commercial krill fishing vessels in the area ... Maru. An Otter midwater trawl of ca. 100 m long with a horizontal open- ing of ca. 20 m and a vertical ... myctophids is too difficult for on-board scientific observers. results and discussion A total of 1 203 ... scientific observers and the crew on board the FV Niitaka Maru and FV Chiyo Maru No. 5 for collecting by ... on ta in in g fis h by -c at ch . D at e: 20 02 20 03 20 04 20 05 20 06 20 07 20 ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 155–163 : Autor(es): Iwami, T., M. Naganobu, K. Taki and M. Kiyota
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KRILLBASE: a multinational, circumpolar database of abundance of Antarctic krill and salps
data have been collected on the abundance of the two taxa from net sampling surveys since 1926, but ... webs and biogeochemical cycles. Sustainably managing the fishery for Antarctic krill against a backdrop ... of rapid regional climate change requires information on distribution and changes over time. Many ... they are stored in national archives, sometimes only in archived notebooks. An international team of ...
Meeting Document : SC-CAMLR-XXXV/BG/24 Rev. 1 : Autor(es): A. Atkinson, S. Hill, H. Peat, R. Downie and L. Gerrish
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Distribución provisional del nivel crítico de captura para la pesquería de Euphausia superba en las Subáreas estadísticas 48.1, 48.2, 48.3 y 48.4
an economic damage to the krill fishery. Author(s): Delegation of Ukraine Title: On interim ... distribution of the trigger level in the fishery for Euphausia superba in statistical Subareas 48.1, 48.2, 48.3 ... and 48.4 Microsoft Word File: e-cc-xxxv-30.docx Approval: Approved Secretariat Workflow Status ... : Content Approved Delegation responsibility for releasing documents: Ukraine ...
Meeting Document : CCAMLR-XXXV/30 : Autor(es): Delegation of Ukraine
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Abundance, size and maturity of krill (Euphausia superba) in the krill fishing ground of Subarea 48.1 during the 1990/91 austral summer
sampling surveys for krill were conducted in the krill fishing ground north of the South Shetland Islands ... were generated, suggesting that hydrodynamic convergence might be responsible for accumulation of krill ... been lower than expected until early February 1991. As for maturity stages of krill, spawning krill ... neritic and nearshore zones. This indicates that slope frontal features may be important for the formation ... 1991 (Figure 1). Transects ran in an offshore-inshore direction with 20 n miles between the transects ... NOAA-A satellites. Typically, twelve locations per day were recorded for each buoy with an accuracy ... biomass estimate for the inshore region, this region was divided into two zones: neritic and nearshore ... ) 188 where Bi = biomass for i-th zone Ai = area for i-th zone. The total biomass (B t) for an ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 183–199 : Autor(es): Ichii, T., H. Ishii and M. Naganobu
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Zonal structure of zooplankton communities in the Southern Ocean south of Australia: results from a 2150 km continuous plankton recorder transect
were measured at 1-min intervals in conjunction with CPR samples. Additional physical data for the ... sectors, was not a zone of distinct ecological transition. Two of the identified assemblages were located ... component of both of these assemblages, this species, together with appendicularia, was most abundant south ...
Meeting Document : WS-BSO-07/P6 : Autor(es): Hunt, B.P.V. and G. Hosie
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Optimization of survey sampling design in the detection of interannual variability and prey size selectivity in the diet of penguins
and prey size selectivity in the diet of penguins Abstract / Description: Based on the preliminary ... results of a survey of prey size in Adélie penguins, sampling designs intended for the detection of inter ... inter-annual variation for mean prey size is fixed at 10%; the test power is taken as 0.9 and Type I ... errors fixed at 0.1. Cost values of manpower required are based on Argentinian logistics. File: 34 ... colonies, etc. For Esperanza Base it was estimated on the basis of two people working for two and a half ... . Depending on methods, experience, etc, for Esperanza Base it was estimated based on two people working for ... dividing the mean square for "years" group by the mean square for "dates-within-years" group. Given the ... Model 11 ANOVA), the expected mean square for "years" group is: (1) 553 where aicp is the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 551–559 : Autor(es): Marschoff, E. and B. Gonzalez