Résultats de la recherche
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Simulation of recovery rates of fish stocks in the South Georgia and Kerguelen Islands areas
Paper Title: Simulation of recovery rates of fish stocks in the South Georgia and Kerguelen ... Islands areas Abstract / Description: The benefits of conservation measures are generally based on the ... rebuilding of the depleted stocks and improvement in yields. It is desirable that such measures be based on ... the expected rate of recovery relative to rates of fishing. A simulation model based on a ... Bertalanffy's equation came from the BIOMASS Scientific Series No. 6, 1985, by K.-H. Kock, G. Duhamel, and J ... ) SIMULATION OF RECOVERY RATES OF FISH STOCKS IN THE SOUTH GEORGIA AND KERGUELEN ISLANDS AREAS R.C ... . Hennemuth, K.D. Bisack and G. Duhamel (USA, France) Abstract The benefits of conservation measures are ... generally based on the rebuilding of the depleted stocks and improvement in yields. It is desirable that ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 229-298 : Auteur(s): Hennemuth, R.C., K.D. Bisack and G. Duhamel
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Estimating unaccounted fishing mortality in the Ross Sea region and Amundsen Sea (CCAMLR Subareas 88.1 and 88.2) bottom longline fisheries targeting Antarctic toothfish
Paper Title: Estimating unaccounted fishing mortality in the Ross Sea region and Amundsen Sea ... counted in estimates of total fishing removals or otherwise accounted for in stock assessment models. The ... mortality resulting from the loss of sections of bottom longline gear in the Ross Sea region and Subarea ... average 208 tonnes of Antarctic toothfish mortality may be unaccounted for annually. While the current ... reported sets and applied to sets with no reported hook loss for all fishing effort within the fleet ... Stock assessments rely on estimates of the total mortality resulting from fishing activities. While ... mortality associated with landed and discarded catch is routinely monitored, the mortality resulting from ... the loss of sections of bottom longline gear in the Ross Sea region and Subarea 88.2 Antarc- tic ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 17–30 : Auteur(s): Webber, D.N. and S.J. Parker
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Age determination of Champsocephalus gunnari Lönnberg, 1905 (Channichthyidae) taken in the South Georgia area in 1990
in the South Georgia area in 1990 Abstract / Description: In January/February 1990 the UK and the ... USSR conducted two research cruises using the vessels RV Hill Cove and RV Akademik Knipovich to study ... the status of the Champsocephalus gunnari stock in the South Georgia area. In February 1990 the size ... 9+ were present in catches. Two peaks in size composition correspond with fish of the 1987 and 1985 ... GUNNARI LONNBERG, 1905 (CHANNICHTHYIDAE) TAKEN IN THE SOUTH GEORGIA AREA IN 1990 P.N. Kochkin ... * * Abstract In January/February 1990 the UK and the USSR conducted two research cruises using the vessels ... RV Hill Cove and RV Akademik Knipovich to study the status of the ChampsocephaZus gunnari stock in ... the South Georgia area. In February 1990 the size composition of catches taken by Akademik Knipovich ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 285–293 : Auteur(s): Kochkin, P.N.
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A potential feedback approach to ecosystem-based management: Model Predictive Control of the Antarctic krill fishery
Control of the Antarctic krill fishery Abstract / Description: CCAMLR aims to develop a feedback approach ... whether a feedback approach is likely to achieve the multiple objectives that EBM implies in the complex ... Control (MPC) to achieve objectives for a harvested species, its predators and the fishery, in a ... simulation model that incorporates uncertainty and spatial and trophic complexity. The approach adjusted ... predator biomass and the model is therefore a bottom-up model with no top-down effects. The catches from ... inter- val of 100 time-steps when there is no harvesting. The parameters controlling the degree of ... measurements of these variables. In the current study there was no explicit repre- sentation of this inference ... expense of higher biomass variability. The fixed catch strategy has no catch variability but it also has ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 119–137 : Auteur(s): Hill, S.L. and M. Cannon
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Revised age and growth estimates for Antarctic starry skate (Amblyraja georgiana) from the Ross Sea
) from the Ross Sea Abstract / Description: A previous study on the age and growth of Amblyraja ... georgiana in the Ross Sea suggested that these skates initially grow very rapidly for about five years ... and growth in A. georgiana that is radically different from the published interpretation is presented ... . By counting fine growth bands in the caudal thorns instead of broad diffuse bands, growth curves have ... % (Campana, 2001). There was no apparent bias between the two readings of reader 1, although individual ... reader 1 for the oldest skates. Randomisation tests showed no significant dif- ference between the ... age and gRowth estimates foR antaRctic staRRy skate (AmblyrAjA georgiAnA) fRom the Ross sea M.P ... , Wellington New Zealand Email – m.francis@niwa.co.nz M.J. Gallagher Irish Sea Fisheries Board The New ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 211–220 : Auteur(s): Francis, M.P. and M.J. Gallagher
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Suggested amendment to Article IV: Application of the Antarctic Treaty to marine areas
or basis of claim. (New paragraph) 3. No acts or activities taking place while the , . present ... :~e ~rinciplcs of Articles IV nnd VI of the An tare tic Trc& ~y to Marir!c Arens 1, All Contracting ... Parties, whether or not they are PaTties to the Antarctic Treaty, are bound by Ar~iclcs IV and VI of the ... to jurisdiction in marin~ areas in which this Convention applies or as prejudicing the position of ...
Document : Site Section: The Organisation
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Size and density of krill layers fished by a Japanese trawler in the waters north of Livingston Island in January 1988
Paper Title: Size and density of krill layers fished by a Japanese trawler in the waters north of ... Livingston Island in January 1988 Abstract / Description: The size and density of fishable krill layers in ... the northern waters of Livingston Island were determined during the co-operative survey carried out by ... RV Kaiyo Maru and a Japanese trawler. The mean values of layer length, thickness and surface density ... BY A JAPANESE TRAWLER IN THE WATERS NORTH OF L1VINGSTON ISLAND IN JANUARY 1988 Y. Endo and Y ... . Shimadzu Abstract The size and density of fishable krill layers in the northern waters of Livingston ... Island were determined during the co-operative survey carried out by RV Kaiyo Maru and a Japanese ... trawler. The mean values of layer length, thickness and surface density were 3.25 km, 13.3 m and 228.0 9 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 339–345 : Auteur(s): Endo, Y. and Y. Shimadzu
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Sensitivity investigation of the SDWBA Antarctic krill target strength model to fatness, material contrast and orientation
Paper Title: Sensitivity investigation of the SDWBA Antarctic krill target strength model to ... fatness, material contrast and orientation Abstract / Description: The distorted-wave Born approximation ... model is recognised as state-of-the-art in predicting acoustic target strength (TS) from fluid-like ... marine organisms. A stochastic version, the so-called SDWBA model, is endorsed by CCAMLR to predict the ... rigorously if the scattering as a function of size and frequency for an individual (i.e. target strength ... modelled (Foote, 1991). In the case of zooplankton, due to the complexity of the scatter- ing processes ... , the acoustical estimates rely on the best aspects of both approaches. In recent decades, large ... et al., 2002; Demer and Conti, 2003). The scattering from an object is given by its form, size and ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 97–122 : Auteur(s): Calise, L. and G. Skaret
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Distribution and abundance of Macrourus carinatus on BANZARE Bank in the southern Indian Ocean
Paper Title: Distribution and abundance of Macrourus carinatus on BANZARE Bank in the southern ... Indian Ocean Abstract / Description: This paper provides an assessment of the distribution and abundance ... of Macrourus carinatus on BANZARE Bank in the southern Indian Ocean (Divisions 58.4.1 and 58.4.3 ... ) based on results from a trawl survey in 1999. This is the first quantitative assessment of M. carinatus ... DISTRIBUTION AND ABUNDANCE OF MACROURUS CARINATUS ON BANZARE BANK IN THE SOUTHERN INDIAN OCEAN E.M. van Wijk ... 7050 Tasmania, Australia Abstract This paper provides an assessment of the distribution and ... abundance of Macrourus carinatus on BANZARE Bank in the southern Indian Ocean (Divisions 58.4.1 and 58.4.3 ... ) based on results from a trawl survey in 1999. This is the first quantitative assessment of M ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 171–178 : Auteur(s): van Wijk, E.M., A.J. Constable, R. Williams and T. Lamb
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Observations on haul-out patterns and trends in the breeding populations of southern elephant seal at Península Valdés (Patagonia) and Stranger Point (25 de Mayo - King George I.)
Paper Title: Observations on haul-out patterns and trends in the breeding populations of southern ... de Mayo-King George I. were studied during the breeding season from 1979 to 1987. Two main objectives ... were taken into consideration: haul-out pattern and the female population trend. In both places, the ... intrinsic population growth rate is positive. In 1982, at Stranger Point, a sharp decrease of the female ... population growth rates were based on the exponential function: Nt = No e rt as suggested by Caughley (1977 ... PATTERNS AND TRENDS IN THE BREEDING POPULATIONS OF SOUTHERN ELEPHANT SEAL AT PENINSULA VALDES (PATAGONIA ... (patagonia) and 25 de Mayo-King George I. were studied during the breeding season from 1979 to 1987. Two ... main objectives were taken into consideration : haul-out pattern and the female population trend. In ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 453-463 : Auteur(s): Vergani, D.F., M.N. Lewis and Z.B. Stanganelli