Résultats de la recherche
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Effects of different harvesting strategies on the mackerel icefish Champsocephalus gunnari around South Georgia
were: different levels of constant fishing mortality (F 0.1, F max, 2xF max); harvesting constantly at ... strategy at present. The establishment of a regular recruit survey would offer the possibility of adjusting ... Paper Title: Effects of different harvesting strategies on the mackerel icefish Champsocephalus ... gunnari around South Georgia Abstract / Description: The effects of a number of harvesting strategies on ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 77–100 : Auteur(s): Köster, F.W. and K.-H. Kock
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SEASONAL ESTIMATION OF ABUNDANCE BY BOOTSTRAPPING INEXACT RESEARCH DATA (SEABIRD): A METHOD FOR ASSESSING ABUNDANCE AND UNCERTAINTY FROM HISTORICAL COUNT DATA USING ADELIE PENGUINS AS A CASE STUDY
Abstract: In addition to a review of published studies on Adelie penguin abundance at breeding ... uncertainty at breeding sites in Antarctica. To achieve this task, a menu-driven suite of routines titled ... concern was to ensure that different types of counts (eg. nests, chicks or adults), perhaps made at ... to assess their effect. Confidence intervals for final estimates at different scales of spatial ...
Meeting Document : WG-EMM-PSW-08/11 : Auteur(s): J.P. McKinlay and C.J. Southwell (Australia)
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ANTARCTIC FUR SEAL PUP PRODUCTION AND POPULATION TRENDS IN THE SOUTH SHETLAND ISLANDS WITH SPECIAL REFERENCE TO SOURCES OF ERROR IN PUP PRODUCTION ESTIMATES
South Shetland Islands in 2007/08. Multiple counts of pups at each colony were conducted to establish ... 2001/02, pup production for the entire archipelago declined at an average annual rate change of-4.3 ... 30 days after the median date of pupping was estimated for the years 1997-2007 at 4.5% (±0.60). Adult ... Abstract: This paper reports the results of a ground survey of fur seal colonies from in the ...
Meeting Document : WG-EMM-PSW-08/14 : Auteur(s): M.E. Goebel (USA), D.E. Torres C. (Chile), A. Miller, J. Santora, D. Costa (USA) and P. Diaz (Chile)
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Distribution, abundance and acoustic properties of Antarctic silverfish (Pleuragramma antarcticum) in the Ross Sea
500 m. A weak layer at about 80 m depth was associated with juvenile silverfish of 50–80 mm standard ... frequency (i.e., was highest at 120kHz), which is characteristic of species without an air-filled ... relationship between TS and fish length at 38 kHz was sensitive to estimates of density and sound speed ... community of top predators in the shelf waters of the Ross Sea. In spite of their abundance and important ...
Meeting Document : WG-FSA-10/P04 : Auteur(s): R.L. O’Driscoll, G.J. Macaulay, S. Gauthier, M. Pinkerton and S. Hanchet
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Guidelines for the preparation of hydroacoustic survey reports on krill
surveys. The unification of echometric survey data is aimed at increasing the effectiveness of research on ... Paper Title: Guidelines for the preparation of hydroacoustic survey reports on krill Abstract ... / Description: The proposed guidelines provide an opportunity to perform comparative analyses and checks of ... results obtained during echometric surveys of fish and krill, and to establish a data bank of these ... echometric survey data is aimed at increasing the effectiveness of research on the· quantitative assessment ... PREPARATION OF HYDROACOUSTIC SURVEY REPORTS ON KRILL I.L.Kalikhman (U.S.S.R.) Abstract The proposed ... guidelines provide an opportunity to perform comparative analyses and checks of results obtained during ... echometric surveys of fish and krill, and to establish a data bank of these surveys. The unification of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 165-193 : Auteur(s): Kalikhman, I.L.
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Spatial distribution of predator/prey interactions in the Scotia Sea: implications for measuring predator/fisheries overlap
scales and arrives at contradictory conclusions. At-sea data from observations of krill predators during ... -linear decline. Krill fisheries operated at a scale of 150 km and almost all of this operation took place ... should be assessed at scales of 70- 100 km to accommodate the scales of operation of the predators ... Abstract: The measurement of spatial overlap between predators and fisheries exploiting a common ...
Meeting Document : WG-EMM-02/14 : Auteur(s): K. Reid, M. Sims, R.W. White and K.W. Gillon (United Kingdom)
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Comparison of age- and length-based harvest control rules for the South Georgia icefish (Champsocephalus gunnari) fishery
model dynamics and assuming perfect knowledge of the resource (initial numbers at age, maturity and ... Abstract: An age-based operating model was constructed and used to derive an initial numbers at ... weight at age). The initial numbers at age was also converted to numbers at length, which was used to ... initialise the length based harvest control rule, again assuming perfect knowledge of the resource. Total ...
Meeting Document : WG-SAM-10/12 : Auteur(s): C.T.T. Edwards, R.M. Hillary, R.E. Mitchell and D.J. Agnew (United Kingdom)
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Effect of a shore-based sampling program on Notothenia coriiceps populations
summers of 1992/93 to 1994/95 at one specific zone (site 1) with those taken in the same last summer at ... started in site 1. Present results show that the size variations of N. coriiceps observed at Potter Cove ... Abstract: The effect of an intensive sampling programme on an inshore population of Notothenia ... coriiceps was studied at Potter Cove, South Shetland Islands, by comparing catch data taken in successive ...
Meeting Document : WG-FSA-99/24 : Auteur(s): R. Casaux and E. Barrera-Oro (Argentina)
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Quantitative stock survey and some biological and morphometric characteristics of the deep-sea red crab Geryon quinquedens off south west Africa
bimodal frequency distribution of female crabs was evident with modal sizes at 7.7 cm and 8.7 cm carapace ... densities occurred at depths of 472-849 m, whereas unusually high concentrations were encountered during two ... trawls at water depths of 549 and 590 m. The red crab survives at extremely low levels of dissolved ... Abstract: In order to assess the abundance of the red crab Geryon quinquedens, two otter-trawl ...
Meeting Document : WS-CRAB-93/22 : Auteur(s): C.J. De B. Beyers and C.G. Wilke (South Africa)
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Revised assessment models for Patagonian toothfish in research block 58.4.3a_1 of Division 58.4.3a, Elan Bank for the years 2005–2014
CCAMLR risk 2 values at 13 tonnes and above for the shallow fishery exceed 50% toward the end of 35 year ... Abstract: We revised sensitivity runs of age-structured and two fisheries (≥1 300 m and < 1 ... 300 m) CASAL models for stock status assessments of Dissostichus eleginoides in the research block ... 58.4.3a_1 following the recommendations of the last WG-SAM meeting. Total of four runs were carried out ...
Meeting Document : WG-FSA-15/22 : Auteur(s): K. Taki (Japan), S. Mormede (New Zealand) and T. Ichii (Japan)