Résultats de la recherche

1. Preliminary analyses of data collected during experimental fishing for Patagonian toothfish in international waters of the southwest Indian Ocean (Area 51)

   procedures, in a restricted area south of Madagascar and north of the Prince Edward and Marion Islands and ... and 1950 metres depth. The Patagonian toothfish appeared in all those sets carried out with values ... of the main ground, in which a residual recruitment effect persists. The total CPUE was 42.21 kg/1000 ... hooks. Depth is the most important factor in Patagonian toothfish distribution within the study area ...

   Meeting Document : WG-FSA-04/19 : Auteur(s): L.J. López Abellán (Spain)

2. Broadbandwidth total target strength measurements of Antarctic krill (Euphausia superba) from reverberation in a cavity

   omnidirectional emitter into one of three glass carboys containing groups of krill swimming in 9.3, 19.3 or 45.9 l ... . At each center frequency (fc), the coherent energy in 200-pulse ensembles identified sound scattered ... each fc was extracted from a correlation analysis of energy reverberated in the tank. Measurement ... accuracy was determined using standard metal spheres for references [Demer et al., in-press, J. Acoust. Soc ...

   Meeting Document : WG-EMM-02/49 : Auteur(s): D.A. Demer and S. G. Conti (USA)

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

   limit on krill (Euphausia superba) in Statistical Area 48. The measure also implies the application in ... , and (vi) the potential for delay in implementing the alternative. An alternative is less likely to ... practical in the near future. Alternatives based on continental shelf area, simple pulse fishing, and krill ... surveys are not biologically explicit and result in delayed implementation. None of the alternatives are ...

   Meeting Document : WG-EMM-01/29 : Auteur(s): G. Watters and R. Hewitt (USA)

4. Entanglement of Antarctic fur seals Arctocephalus gazella in man made debris at Signy Island, South Orkney Islands, 1998/99

   males, the main component of the population at this time of year. The number of sightings increased by ... parallel study undertaken at Bird Island, South Georgia in 1998/99. These indicated that the number of ... of fur seals was entangled in packaging bands at Signy Island (67%) than at Bird Island (38 ... %). Entanglements in packaging bands at Signy Island were 47% higher than the previous season. There were no reports ...

   Meeting Document : SC-CAMLR-XVIII/BG/06 : Auteur(s): Delegation of the United Kingdom

5. 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 ... gillnets. However these figures are likely to be underestimates of total mortality in gillnets, due to the ... evidence of large numbers of sea-lice depredated fish in the net. Author(s):  Snowdon, D., Hamill, J ...

   Meeting Document : TASO-09/10 : Auteur(s): Snowdon, D., Hamill, J., McEachan, F., Welsford, D.

6. LENGTH-BASED ASSESSMENT FOR THE MACKEREL ICEFISH (CHAMPSOCEPHALUS GUNNARI) IN SUB-AREA 48.3

   Abstract:  The current assessment method for the mackerel icefish (Champsocephalus gunnari) in sub ... numbers forward under the given harvest control rule to set a two-year TAC. One issue is the accurate ... identification of cohorts from the survey model, given the differential age structures observed in the population ... at Shag rocks and around South Georgia. In this paper we propose a length-based approach that removes ...

   Meeting Document : WG-SAM-09/15 : Auteur(s): R.M. Hillary, D.J. Agnew and R. Mitchell (United Kingdom)

7. USING GENERALIZED DISSIMILARITY MODELLING TO ANALYSE AND PREDICT PATTERNS OF BETA DIVERSITY IN REGIONAL BIODIVERSITY ASSESSMENT

   predicting spatial patterns of turnover in community composition (beta diversity) across large regions. The ... nonlinearity commonly encountered in large-scaled ecological data sets: (1) the curvilinear relationship ... ) the variation in the rate of compositional turnover at different positions along environmental ... assessment activities including visualization of spatial patterns in community composition, constrained ...

   Meeting Document : WS-VME-09/P03 : Auteur(s): Richardson, K., Manion, G., Ferrier, S., Elith, J.

8. Conditions for the precise measurement of fish target strength in situ

   Abstract:  Conditions for precise measurement of in situ fish target strength (TS) are empirically ... studied and two indexes are introduced for this purpose. One is the number of fish in the effective ... obtained from one large same fish school in the eastern shelf of Bering sea during the intership ... calibration between Japanese and U.S. vessels on 15 and 16 August 1991. Published in J.Mar.Acoust.Soc. Author ...

   Meeting Document : WG-Krill-94/35 : Auteur(s): K. Sawada and M. Furusawa (Japan), N.J. Williamson (USA)

9. Rockhopper penguins and other marine life threatened by driftnet fisheries in the south Atlantic ocean

   -target species in the Pacific Ocean, has extended its range to include the South Atlantic Ocean ... . Relatively little is known about the areas of operation and impacts of driftnetting in the South Atlantic as ... . This paper reviews the impact of the driftnet fishery on non-target species in the central South ... , apparently resulting in considerable mortality of rockhopper penguins (Eudyptes chrysocome) and other marine ...

   Meeting Document : CCAMLR-IX/BG/05 : Auteur(s): Delegation of South Africa

10. Some aspects of the relation between Antarctic krill abundance and CPUE measures in the Japanese krill fishery. (Component of SC-CAMLR-VI/BG/4)

    quality considerations- in particular the increasing tendency to avoid catching "green” krill. These ... factors result in Catch-per-Day and Catch-per-Haul measures being unlikely to index krill abundance ... time data may be needed to assess the density of swarms in a concentration, but may be difficult to ... record in practice, and a number of other factors may complicate any analysis. The possibility of ...

    Meeting Document : WS-KCPUE-89/03 : Auteur(s): D.S. Butterworth (South Africa)

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