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1. Statistical problems in krill stock hydroacoustic assessments

   :  Two primary issues are at question for hydroacoustic assessments of krill. The first is the methods ... applied to establish biomass in a survey area and the second is the improvement in accuracy of target ... -strength measurements. In the case of statistical methods, there are no clear guidelines for deciding what ... method is most appropriate, this is made even more difficult by the fact that most survey methods assume ... John Bengtson). The point is that if we can begin to isolate the causes of patchiness and/or areas ... assessments of krill. The first is the methods applied to establish biomass in a survey area and the second ... is the improvement in accuracy of target-strength measurements. In the case of statistical methods ... difficult by the fact that most survey methods assume the population is fixed in space, relative to the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 301–309 : Автор(ы): Macaulay, M.C.

2. Krill biomass in Area 48 and Area 58: recalculations of FIBEX data

   / Description:  FIBEX acoustic and length frequency data held in the BIOMASS database were used to provide ... estimates of mean density and biomass for the Indian Ocean sector and the West Atlantic sector as well as ... estimates were calculated using the target strength relationships used at the original FIBEX acoustic ... workshop. Estimates for the different areas were also calculated using the target strength relationships of ... survey was 16 January 1981 and the end was 12 March 1981 (excluding Umitaka Maru and Melville) a period ... held in the BIOMASS database were used to provide estimates of mean density and biomass for the ... Indian Ocean sector and the West Atlantic sector as well as for FAO Statistical Area 41, and CCAMLR ... Subareas 48.1,48.2,48.3,48.6 and Division 58.4.2. Density estimates were calculated using the target ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 157–181 : Автор(ы): Trathan, P.N., D.J. Agnew, D.G.M. Miller, J.L. Watkins, I. Everson, M.R. Thorley, E. Murphy, A.W.A. Murray and C. Goss

3. Detection and quantitative estimation of krill concentrations by hydroacoustic instruments

   instruments Abstract / Description:  The limited capabilities of existing hydroacoustic instruments in ... in areas surveyed. The task of detecting surface concentrations of krill can be solved with the help ... of towed acoustic antennae. The practical possibility of detecting dispersed krill by hydroacoustic ... instruments was established on board the research vessel Odissey during the international expedition under the ... ESTIMATION OF KRILL CONCENTRATIONS BY HYDROACOUSTIC INSTRUMENTS K.I. Yudanov (U.S.S.R.) Abstract The ... concentrations of krill lead to considerable underestimates of krill biomass in areas surveyed. The task of ... detecting surface concentrations of krill can be solved with the help of towed acoustic antennae. The ... the research vessel Odissey during the international expedition under the FIBEX program. It was ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 123-139 : Автор(ы): Yudanov, K.I.

4. Some principles for fisheries regulation from an ecosystem perspective

   / Description:  The paper discusses some principles to be considered in the formulation of a framework for the ... regulation of fisheries from an ecosystem perspective, under the Convention for the Conservation of Antarctic ... regulation which have a more rigorous scientific interpretation than the broad principles of conservation set ... out in the Convention. An important property required for subsidiary objectives is that they are ... REGULATION FROM AN ECOSYSTEM PERSPECTIVE W.K. de la Mare (Australia) Abstract The paper discusses some ... principles to be considered in the formulation of a framework for the. regulation of fisheries from an ... ecosystem perspective, under the Convention for the Conservation of Antarctic Marine Living Resources. An ... rigorous scientific interpretation than the broad principles of conservation set out in the Convention ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 323-339 : Автор(ы): de la Mare, W.K.

5. Consideration of major issues in ecosystem monitoring and management

   / Description:  This paper outlines the requirements of an ecosystem approach to the management of Southern ... Ocean resources and highlights the need for information on harvested and dependent species, their ... interactions and the manner in which their populations vary naturally. Large-scale interactions are catered for ... in the Krill Yield Model (KYM). Smaller-scale interactions centre around three main categories: the ... age-based analysis after the event. These methods are well described in a number of standard texts ... Cambridge CB3 0ET, United Kingdom Email – iev@pcmail.nerc-bas.ac.uk Abstract This paper outlines the ... requirements of an ecosystem approach to the management of Southern Ocean resources and highlights the need ... for information on harvested and dependent species, their interactions and the manner in which their ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 213–232 : Автор(ы): Everson, I

6. Alternative methods for determining subarea or local area catch limits for krill in Statistical Area 48

   precautionary catch limit on krill (Euphausia superba) in Statistical Area 48. The measure also implies an ... ) the degree to which information on biological relationships is considered; (ii) the cost of data ... collection; (iii) the reliability of required information; (iv) the ease of enforcement; (v) the effects on ... current fishing patterns; and (vi) the potential for delay in implementing the alternative. An alternative ... (Euphausia superba) in Statistical Area 48. The measure also implies an application in future of ... or local area krill catch limits are evaluated relative to six criteria: (i) the degree to which ... information on biological relationships is considered; (ii) the cost of data collection; (iii) the ... reliability of required information; (iv) the ease of enforcement; (v) the effects on current fishing ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 237–249 : Автор(ы): Watters, G. and R.P. Hewitt

7. A risk-management framework for avoiding significant adverse impacts of bottom fishing gear on Vulnerable Marine Ecosystems

   Ecosystems (VMEs) are avoided. Due to the high levels of uncertainty surrounding both the evidence of VME ... presence and the consequences of interaction with different types of gear, a risk-management framework is ... proposed, similar to that which has been used successfully to minimise the effects of longline fishing ... mortality on seabirds. Risk is broadly defined as the conditional probability of adverse impacts given ... MARINE ECOSYSTEMS K. Martin-Smith Australian Antarctic Division Department of the Environment, Water ... , Heritage and the Arts 203 Channel Highway, Kingston 7050 Tasmania, Australia Email – keith.martin-smith ... impacts of bottom fishing gear on Vulnerable Marine Ecosystems (VMEs) are avoided. Due to the high levels ... of uncertainty surrounding both the evidence of VME presence and the consequences of interaction ...

   Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 177–193 : Автор(ы): Martin-Smith, K

8. Choosing distance between acoustic survey tacks

   mathematical model was used to show that the distance between acoustic survey tacks can reasonably be selected ... on the basis of typical size of the surveyed region, allowable relative error in the biomass estimate ... , and the variation coefficient of the density values of the krill concentrations. It is recommended ... that the suggested criterion be applied in real hydroacoustic surveys. File:  08-Kalikhman-et-al.pdf ... mathematical model was used to show that the distance between acoustic survey tacks can reasonably be selected ... on the basis of typical size of the surveyed region, allowable relative error in the biomass ... estimate, and the variation coefficient of the density values of the krill concentrations. It is ... recommended that the suggested criterion be applied in real hyroacoustic surveys. CHOISIR LA DISTANCE ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 153-164 : Автор(ы): Kalikhman, I.L., Z.I. Kizner, B.R. Zaripov and W.D. Tesler

9. A simulation study of krill fishing by an individual Japanese trawler

   / Description:  A model is set up for the operation (which includes both searching and fishing) of a Japanese ... parameters are determined primarily from the scientific FIBEX surveys. Output from the model of the operation ... is compared with (and partially tuned to) statistics for a sample of data from the commercial fishery ... . A major inconsistency is found: haul times are a factor of 4-5 times greater in reality than in the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 1–108 : Автор(ы): Butterworth, D.S.

10. International CCAMLR applied research and monitoring program, Prydz Bay priority area

    Australia towards the first five years of an International CCAMLR Applied Research and Monitoring Program in ... the Prydz Bay area. Emphasis is placed on the krill based part of the marine community in the Prydz ... Bay area. Some attention is also given to the fish and squid based part of the marine community on the ... a proposed scientific research contribution by Australia towards the first five years of an ... International CCAMLR Applied Research and Monitoring Program in the Prydz Bay area •. Emphasis is placed on ... the krill based part of the marine community in the Prydz Bay area. Some attention is also given to ... the fish and squid based part of the marine community on the Kerguelen Plateau. PROGRAMME ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 283-295 : Автор(ы): Australia

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