Resultados de la búsqueda
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Selectivity of standard polish commercial trawl codends on Antarctic fishing grounds
difficult matter will be preparing a codend with proper selectivity properties for South Georgia icefish ... Abstract: steelon codends used in commercial fishery, with a nominal mesh size A = 80 mm and A ... = 100 mm, made of double twines with a thickness of 4.2 mm. The studies covered 6 major fish species. 1 ... . It appears from the study that Antarctic icefish and bumphead notothenia are subject to selection ...
Meeting Document : SC-CAMLR-VII/BG/11 : Autor(es): J. Zaucha (Poland)
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Revised research plan for the Spanish exploratory longline fishery for Dissostichus spp. in Divisions 58.4.1 and 58.4.2: Fundamentals and procedures (this is a revision of WG-SAM-12/13)
are proposed, a depletion experiment together with the tag of some specimens using the DeLury model ... achieving the objectives three study areas with high historical effort have been selected in different SSRUs ... with four different scenarios related to the extent of the area. The regression coefficients between ... the CPUE and the cumulative catch seem to be a practical way to stablish the area (10 nautical miles ...
Meeting Document : WG-FSA-12/69 : Autor(es): R. Sarralde, L.J López Abellán and S. Barreiro (Spain)
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Integrating Count Effort by Seasonally Correcting Animal Population Estimates (ICESCAPE): a method for estimating abundance and its uncertainty from count data using Adélie penguins as a case study
animal count data to a common reference point of breeding chronology for species with a complex temporal ... Population Estimates) is a suite of routines that implements a general abundance estimator accounting for ... reported measures of uncertainty associated with originally published counts are propagated through to the ... -specific estimates to be aggregated to achieve region-scale population estimates. By way of illustration ... interacts with the types of bias noted above, concerns sampling. Often, sam- ple counts will be taken from ... entire area, counts must be adjusted for the fraction of the total survey region that is searched ... relatively brief visits to sites, compared with collecting adjustment data that may require much longer ... suffi- ciently general to be relatively easily adapted for other species with similar biology. In the ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 213–227 : Autor(es): McKinlay, J., C. Southwell and R. Trebilco
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Impact of predation by Cape fur seals Arctocephalus pusillus on Cape gannets Morus capensis at Malgas Island, Western Cape, South Africa
gannet colonies, between 2001/02 and 2005/06. There has been a large increase in predation by Cape fur ... seals on seabirds around southern African islands since the mid 1980s, coincidental with both an ...
Meeting Document : WG-EMM-06/9 : Autor(es): A.B. Makhado, R.J.M. Crawford and L.G. Underhill (South Africa)
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The structure and spatial distribution of Antarctic krill aggregations from acoustic observation in the South Georgia area
that in winter months in the northwestern part where foraging areas of dependent predators are located ... is non-attractive to fishery. The observed grounds with krill density exceeding the threshold value ... South Georgia area allows to assume that dispersed aggregation (layer and irregular forms) much more ... that not only krill biomass density, but also its availability determined by krill aggregations ...
Meeting Document : WG-EMM-04/66 Rev. 1 : Autor(es): S.M. Kasatkina (Russia)
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Examination of the CCAMLR toothfish GLM
nationalities, coupled with the existence of the experimental fishery in 1994, lead us to suggest that future ... CPUE in Subarea 48.3 are investigated. Problems with crossover between the essentially summer fishery ... analyses should be restricted to GLMs based on winter data alone. Unfortunately, this does result in there ...
Meeting Document : WG-FSA-98/35 : Autor(es): G.P. Kirkwood and D.J. Agnew (United Kingdom)
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Variability of krill stock composition and distribution in the vicinity of Elephant Island during AMLR investigations 1988-1992
distributional patterns during each year indicate that the older age classes were associated with oceanic/Drake ... recruitment from the 1989/90 and 1990/91 year classes. Year class success may be related to the abundance of ... Passage waters while younger classes were associated with water masses to the south. Between-year ...
Meeting Document : WG-KRILL-92/12 : Autor(es): V. Loeb (USA) and V. Siegel (Germany)
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By-catch of juvenile Champsocephalus gunnari in krill fishery on the shelf of South Georgia Island
abundant species around South Georgia Is. Results of these survey were summarised and compared with ... published data. Juveniles of Champsocephalus gunnari were found to be distributed from the surface to 500 m ... depth with a maximum density observed at depth between 100 and 200 m. High catches of C. gunnari ... . Estimated mortality of C. gunnari juveniles is relatively small and was estimated that 0.3 to 0.5% of fish ...
Meeting Document : WG-FSA-92/06 : Autor(es): G.A. Frolkina, V.I. Latogursky, V.A. Sushin (Russian Federation)
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WG-EMM-11
CONSISTENT WITH THE CATCH TRIGGER LEVEL FOR THE ANTARCTIC KRILL FISHERY IN AREA 48 T. Peatman, J. Moir Clark ... IN SUBAREAS 48.1 TO 48.3 S.L. Hill and J. Silk (UK) WG-EMM-11/19 PROGRESS WITH UPDATING OF THE ... KRILL AND APEX PREDATORS WITH THE COMMERCIAL FISHING VESSEL SAGA SEA IN THE SOUTH ORKNEY ISLANDS AREA ... -CATCH IN JAPANESE KRILL FISHERY BASED ON SCIENTIFIC OBSERVER DATA T. Okuda and M. Kiyota (Japan) WG-EMM ...
Meeting
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Preliminary model of krill fishery behaviour in Subarea 48.1
restricted to the four months December to March, compares favourably with the historical distribution of ... Elephant Islands. The model predicts that the management option of closing the zones around Livingston and ... Elephant Islands in alternate years would result in an average yearly catch similar to that at present ... . However, in this scenario, the catch would be more concentrated in foraging areas of land-based predators ... concern that the krill fishery may compete for the krill resource with land-breeding predators (e.g ... CCAMLR might decide that it would be prudent to impose some precautionary measures to restrict the ... ) to be spent in the fine-scale square with mid-longitude X and mid-latitude y, p, , = preference ... took place over four months and a square (x,y) was closed for that time, t , , was set to zero ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 71–79 : Autor(es): Agnew, D.J. and V.H. Marín