Результаты поиска

1. Modifications to the Generalised Yield Model in 2004, version GYM501E.EXE

   Abstract:  The Generalised Yield Model is used by the WG-FSA in the assessments of Champsocephalus ... in 2004 an error in the calculation of the recruitment series from survey data was detected. This ... error does not affect the assessments undertaken in recent years. This paper presents the nature of the ... error and the manner in which it was corrected. The recruitment series is the estimate of abundance of ...

   Meeting Document : WG-FSA-04/91 : Автор(ы): A.J. Constable (Australia)

2. REPORT ON THE ABANDONED GILLNET RETRIEVAL OPERATION CONDUCTED BY AUSTRALIA IN CCAMLR STATISTICAL DIVISION 58.4.3B (BANZARE BANK)

   gillnets as a fishing method to target toothfish in the Convention area. Estimating the impact of IUU ... . Based on the amount of toothfish found in the 8 km long section of net retrieved, upwards of 29 tonnes ... fishing is hampered by a lack of data on the design, deployment, catch and bycatch rates of gill nets ... (Statistical Division 58.4.3b), and the toothfish and bycatch found when a section of the gillnet was retrieved ...

   Meeting Document : CCAMLR-XXVIII/BG/22 : Автор(ы): Delegation of Australia

3. To what extent do type C killer whales (Orcinus orca) feed on Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea, Antarctica?

   . It is also possible that changes in killer whale feeding can affect the structure and stability of ... commonly observed carrying toothfish in their mouths; (2) comparison of the relative nutrient density of ... higher quality than other potential prey in the Ross Sea region; (3) densities of other alternative ... reduced catch rates of toothfish by scientific fishing in McMurdo Sound, though the reasons for observed ...

   Meeting Document : WG-EMM-13/29 : Автор(ы): L. Torres, M.H. Pinkerton (New Zealand), R. Pitman, J. Durban (USA) and R. Eisert (New Zealand)

4. Notes on Champsocephalus gunnari biology, availability, diet and spatial distribution in the South Shetland and South Orkney Islands (Subareas 48.1 and 48.2)

   Abstract:  Stocks of the mackerel icefish Champsocephalus gunnari in the Southern Scotia arc ... characteristics than stocks in the Northern Scotia Arc. The history of commercial C. gunnari exploitation in the ... Southern Scotia Arc was short lived and intense, and led to the collapse of the stocks. Stocks in this ... Livingston Island. The dietary composition of C. gunnari appears to be more diverse in the South Orkney ...

   Meeting Document : WAMI-01/10 Rev. 1 : Автор(ы): C.D. Jones and J. Emery (USA)

5. Fish distribution and biomass in the Heard Island zone (Division 58.5.2)

   . In order to assess the potential of this area for commercial fishing, and to obtain some preliminary ... Paper Title:  Fish distribution and biomass in the Heard Island zone (Division 58.5.2) Abstract ... / Description:  Division 58.5.2 encompasses the southern part of the Kerguelen plateau, and contains Heard ... distribution, abundance and biology of the most important species, covering a number of years and seasons. Five ... ., 1985). In order to assess the potential of this area for commerc ia l f ishing, a n d t o ob t a ... in contact with the bottom. Survey design - Estimates of abui~dance were derived from a swept ... the results from these two strata in autumn 1990; * the minimum number of trawls on Discovery ... density of C. gunnari found there during autumn 1990 and on the joint Soviet/Australian survey in 1987 ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 1–20 : Автор(ы): Williams, R. and W.K. de la Mare

6. Physical forcing in the southwest Atlantic: ecosystem control

   Abstract:  In the southwest Atlantic sector of the Southern Ocean, temporal variability in the ... temperature at South Georgia shows the presence of high levels of autocorrelation, with periodicity evident in ... physical environment has been recorded since the early part of the last century. For example, ocean ... anomaly data for the El Niño 4 region in the Pacific show that variability at South Georgia also reflects ...

   Meeting Document : WG-EMM-04/34 : Автор(ы): P.N. Trathan, E.J. Murphy, J. Forcada, J.P. Croxall, K. Reid and S.E. Thorpe (United Kingdom)

7. Proposal for an extension to the mark recapture experiment to estimate toothfish population size in Subarea 48.4

   assessment of D. eleginoides stock size in the Northern Area of 48.4 estimates a vulnerable biomass of ... 48.4 in the 2008/09 fishing season so as to allow for a full assessment of D. eleginoides stock size in ... introduced for bycatch species in the Northern Area of 48.4, set at 16% Macrourus spp. and 5% Rajid spp of ... between 1,000 to 2,000 tonnes. 3. The UK proposes to continue the mark-recapture experiment in Subarea ...

   Meeting Document : WG-FSA-08/46 : Автор(ы): J. Roberts and D. J. Agnew (UK)

8. KRILL FISHERY BEHAVIOUR IN THE SOUTHWEST ATLANTIC

   to year variability in the probabilities of operating within a local range after a number of tows. In ... /operational requirements in an area. These kinds of analysis show the importance of good year-round data from ... behaviour of krill fishery. Analysis of travel distance in relation to catch level revealed a pattern that ... close even after considerable number of hauls. The scales of distance after 50 tows from the original ...

   Meeting Document : WG-EMM-08/39 : Автор(ы): S. Kawaguchi (Australia)

9. DEFINING TAG RATES AND TACS TO OBTAIN SUITABLY PRECISE ABUNDANCE ESTIMATES FOR NEW AND EXPLORATORY FISHERIES IN THE CCAMLR CONVENTION AREA

   formula that gives the expected coefficient of variation of the abundance estimate in terms of the number ... of releases and recaptures, which can in turn be expressed in terms of the tagging rate per tonne ... given precision in the Petersen abundance estimate. To show the reliability of the precision ... be extremely useful in terms of defining suitable catch levels and tagging rates required to obtain a ...

   Meeting Document : WG-SAM-08/06 : Автор(ы): R.M. Hillary (UK)

10. Surface water circulation in krill fishing areas near the South Shetland Islands

    deployed in shelf and oceanic waters to the north of the South Shetland Islands. Each buoy was deployed ... sluggish southwest current with a series of small-scale circular and semi-circular flows in the shelf ... calculations. The picture obtained of the surface circulation was considered in conjunction with the ... distribution of krill catches taken in the area by Japanese vessels during the period from 1981 to 1994. It is ... current with a series of small-scale circular and semi-circular flows in the shelf region, whereas the ... . The picture obtained of the surface circulation was considered in conjunction with the distribution ... of krill catches taken in the area by Japanese vessels during the period from 1981 to 1994. It is ... which contribute to the formation of stable krill concentrations in the area. The observed long ...

    Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 125–136 : Автор(ы): Ichii, T. and M. Naganobu

Страницы