Résultats de la recherche

1. A hybrid approach to acoustic classification and length estimation of krill

   / Description:  The problem of acoustically identifying and estimating the sizes of two euphausiid species is ... components are the mean ratios of the volume backscattering coefficients, measured at two different ... individually for each component of a vector, using classical Bayesian techniques. Classification probabilities ... frequencies. The decisions on the species and the relative misclassification errors are calculated ... animal measurement. For small school- ing organisms, such as euphausiids, this criterion is seldom met ... error |δ| is high for afj / fi < a1, decreases approaching the middle point between the two bends ... euphausiids are identifi ed for an output ranging between 4/1 fj fi rfΔ and their equivalent radius can be ... estimated confi dently in the interval (amin – amax) where 100|δ| < 20%, for a given dΔ. The mean length ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 33–58 : Auteur(s): Azzali, M., I. Leonori and G. Lanciani

2. Focusing and testing fisher know-how to solve conservation problems: a common sense approach

   seabird mortality in two fisheries: the Puget Sound drift gillnet fishery for sockeye salmon and the ... of an active fishery. At the scientific level, peer review and publication certify results for the ... , turtles and seabirds, can pose serious threats to specific animal populations causing public outcry and ... longline fisheries in Alaska for sablefish and Pacific cod. Although these fisheries are very different ...

   Meeting Document : WG-FSA-03/20 : Auteur(s): E.F. Melvin and J.K. Parrish (USA)

3. e-sc-xxxi-a07.pdf

   ... 2+ fish last year. This survey did not provide adequate spatial coverage to provide an assessment ... . Management advice 4.6 The Working Group did not undertake an assessment of C. gunnari for Subarea 48.3 in ... operations and a catch limit of 30 tonnes of C. gunnari was set aside for research and by-catch (4.4 tonnes ... catch for the current CCAMLR season reported to October 2012 was 2 957 tonnes. 4.22 An integrated application/pdf attached to:WG-FSA-12

   Meeting Report : WG-FSA-12

4. Is current management of the Antarctic krill fishery in the Atlantic sector of the Southern Ocean precautionary?

   conservatively estimated subarea biomass in up to 20% of years due to high variability in krill biomass indices ... about the state of the regional krill stock. In this region, krill fishing is permitted in an area of ... approximately 3.5 million km 2 which is divided into four subareas (labelled Subareas 48.1 to 48.4) for ... 1991, is 0.62 million tonnes year –1, equivalent to ~1% of the regional biomass estimated in 2000. Each ... for 20 years would reduce the krill stock by 2% (SC-CAMLR, 2011). Clearly, any significantly greater ... tonnes year–1, since 2009. There is some evidence for a decline in the abundance of krill in the 1980s ... exploitation rate (the percentage of an initial biomass that can be caught each year) of 9.1%. The inputs to ... stated as a limit for the krill fishery in CM 32/X in 1991). Each of these limits defines an amount of ...

   Science Journal Paper : CCAMLR Science, Volume 23 (CCAMLR Science, Volume 23) : 31–51 : Auteur(s): Hill, S.L., A. Atkinson, C. Darby, S. Fielding, B.A. Krafft, O.R. Godø, G. Skaret, P.N. Trathan and J.L. Watkins

5. e-sc-xxxvii-a7.pdf

   ... for management, following support for such an approach by the Scientific Committee (SC-CAMLR-XXXVI ... an experimental approach for evaluating the effects of krill fishing could be incorporated in a ... monitoring data available for addressing questions related to predators in an experimental framework have ... benefits and costs for the fishery. Results further indicated such an MPA may also preclude requirements application/pdf attached to:WS-SM-18

   Meeting Report : WS-SM-18

6. e-sc-i.pdf

   ... with Article XXIII of the Convention. FAO has an established system for the reporting of catch and ... on Bird Ecology, a programme for an International Survey of Antarctic Sea Birds (ISAS) will ... resources on an experimental or commercial basis since the year harvesting began should be reported. The ... described in document SC-CAMLR-I/7. It was realised that there is an urgent need for biological data application/pdf attached to:SC-CAMLR-I

   Meeting Report : SC-CAMLR-I

7. Measurements of differences in the target strength of Antarctic krill (Euphausia superba) swarms at 38 kHz and 120 kHz

   differences in the mean back-scattering strength of swarms simultaneously insonified at these two frequencies ... in average target strength at these two frequencies. The results are in good agreement with recent ... experimental work on the target strength of encaged E. superba at 38 and 120 kHz but are in major conflict with ... Receiving Sensitivity (SL + VRS) for both sounders was measured to within an estimated ± 0.5 dB by ... were interchanged, removing any fear that the differences were an artefact of differences in the two ... Figure 4, and for the two Elephant Island samples in Figure 5. Mean lengths in the two area were 48.75 ... for an error of 0.5 dB in the estimation of SL + VRS, and for the same error in the equivalent beam ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 75–86 : Auteur(s): Hampton, I.

8. e-sc-xxix-a7.pdf

   ... ...................................... 250 Development for an accreditation process and timeline ................................. 250 ... demersal longline fisheries, is required prior to an observer being considered for deployment in Antarctic ... for CCAMLR fisheries and an understanding of the CCAMLR conservation measures. Assessment is based ... INTERNATIONAL SCIENTIFIC OBSERVATION Development for an accreditation process and timeline 2.1 The application/pdf attached to:TASO-10

   Meeting Report : TASO-10

9. Development of the CCAMLR Marine Protected Area (MPA) Information Repository (CMIR)

   ), which has been divided into two phases for development. Phase 1 is a proof of concept targeted for ... focus on user interaction, exploration of RMP projects, and server design. Phase 2 outcomes include an ... . Updates and recommendations related to Phase 2 will be presented at WG-EMM-2020. Author(s):  CCAMLR ... Document Release Consent:  Yes Delegation responsibility for releasing documents:  CCAMLR Secretariat ...

   Meeting Document : SC-CAMLR-38/BG/04 : Auteur(s): CCAMLR Secretariat

10. Notothenia (p.) gibberifrons Stock Status and TAC Estimation in the Area of Shag Rocks (Subarea 48.3)

    . guntheri abundance was estimated as 227 thousand tons (using all the above-mentioned methods). For 1986/87 ... Abstract:  Data on age composition of catches and fishing efforts for 1979/80- 1987/88 were used ... the mean value of fishing mortality for the main commercially taken age groups (2- 4 years); b ... predicted period is F0.1. In the first two cases TAC is 12.3- 12.7 thousand tons and in the third case- 32.3 ...

    Meeting Document : WG-FSA-88/33 : Auteur(s): R. Borodin and K. Shust (USSR)

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