Résultats de la recherche

1. Midwater trawl catchability in relation to krill and possible ways of assessing gross catch

   the basis of data obtained from AtlantNIRO expeditions from 1983 to 1990 in the Scotia Sea. A ... as it passes through the trawl sides. Studies were based on the results of 250 hauls made with a 72 ... theoretical calculations. A comparison of the experimental hydroacoustic assessment with the calculated one ... data obtained from AtlantNIRO expeditions from 1983 to 1990 in the Scotia Sea. A methodology was ... through the trawl sides. Studies were based on the results of 250 hauls made with a 72/308 trawl ... calculations. A comparison of the experimental hydroacoustic assessment with the calculated one demonstrated ... increased. Resume Une recherche sur les taux de capturabilite des chaluts pelagiques aete effectuee a ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 87–113 : Auteur(s): Zimarev, Yu.V., S.M. Kasatkina and Yu.P. Frolov

2. Krill biomass assessment in Statistical Area 48 from the RV AtlantNIRO data - Autumn 1989/90

   1989/90 Abstract / Description:  A krill biomass census survey was carried out at two fishing grounds ... in the South Sandwich and South Orkney Islands areas during a cruise by RV AtlantNIRO in March/April ... 1990. The survey was conducted in the upper 100 m layer using a modified Isaacs-Kidd trawl. Trawling ... AREA 48 FROM THE RV ATLANTNIRO DATA - AUTUMN 1989/90 A.C. Fedotov* * Abstract A krill biomass ... areas during a cruise by RV AtlantNIRO in March/April 1990. The survey was conducted in the upper 100 ... m layer using a modified Isaacs-Kidd trawl. Trawling speed was 3.2 to 3.6 knots. The total krill ... campagne d'evaluation de la biomasse du krill s'est derou16e, a bord du navire de recherche AtlantNIRO ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 115–121 : Auteur(s): Fedotov, A.C.

3. Killer whale (Orcinus orca) and sperm whale (Physeter macrocephalus) interactions with longline vessels in the Patagonian toothfish fishery at South Georgia, South Atlantic

   , were present during 5% of haul observations. A high inter-vessel variation was noted for interactions ... with both species. A comparison of geographic plots of cetacean sightings during hauls to fi shing ... positions showed that interactions occurred over a wide geographic range. These were mostly correlated to ... were relatively few and usually occurred before midnight. Interactions with sperm whales followed a ... present during 5% of haul observations. A high inter-vessel variation was noted for interactions with ... both species. A comparison of geographic plots of cetacean sightings during hauls to fi shing ... positions showed that interactions occurred over a wide geographic range. These were mostly correlated to ... were relatively few and usually occurred before midnight. Interactions with sperm whales followed a ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 111–126 : Auteur(s): Purves, M.G., D.J. Agnew, E. Balguerías, C.A. Moreno and B. Watkins

4. Some aspects of the relation between Antarctic krill abundance and CPUE measures in the Japanese krill fishery

   -swarm density. Search 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 ... attention. A data sample from the Japanese krill fishery statistics data-base has been selected for further ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 109–125 : Auteur(s): Butterworth, D.S.

5. Investigation of bias in the mark–recapture estimate of toothfish population size at South Georgia

   population size. It does so by constructing a spatial model of the South Georgia toothfish fishery ... an average movement rate downwards when fish entered a high-density box (as indicated by high CPUE ... ) and upwards in a low-density box, so that they tended to be retained in high-density boxes. The model ... situations. It produced a near-perfect estimate of stock size when there was an ideal distribution of tags ... constructing a spatial model of the South Georgia toothfish fishery, simulating fish movements within this ... when fish entered a high-density box (as indicated by high CPUE) and upwards in a low- density box, so ... over multiple years. The model performed as expected with test situations. It produced a near-perfect ... taille des populations. Pour ce faire, on a procédé à la construction d’un modèle spatial de la pêcherie ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 47–63 : Auteur(s): Agnew, D.J., G.P. Kirkwood, J. Pearce and J. Clark

6. Comparison of two methods to assess fish losses due to depredation by killer whales and sperm whales on demersal longlines

   and sperm whales on demersal longlines Abstract / Description:  Depredation is a human–wildlife ... interaction over access to resources, which often includes a combination of socio-economic, ecological and ... approach, which can only be implemented when a sufficient level of by-catch species occurs, provides ... addition to providing a methodology that could be used in other areas with depredation issues, these ... Centre d’Etudes Biologiques de Chizé (CEBC) CNRS-ULR, UMR 7273 France Abstract Depredation is a ... human–wildlife interaction over access to resources, which often includes a combination of socio ... depredated Patagonian toothfish. This approach, which can only be implemented when a sufficient level of by ... reported elsewhere in the world. In addition to providing a methodology that could be used in other areas ...

   Science Journal Paper : CCAMLR Science, Volume 22 (CCAMLR Science, Volume 22) : 1–14 : Auteur(s): Gasco, N., P. Tixier, G. Duhamel and C. Guinet

7. Fishing ground selection in the Antarctic krill fishery: trends in patterns across years, seasons and nations

   contributors to the total catch. A recent shift in operational timing towards later months within fishing ... selection were characterised using a cluster analysis. Frequently used SSMUs did not always match the areas ... further discussed. A revised format for data submission is suggested in order to accommodate possible ... major contributors to the total catch. A recent shift in operational timing towards later months ... patterns of seasonal SSMU selection were characterised using a cluster analysis. Frequently used SSMUs did ... for this mismatch are further discussed. A revised format for data submission is suggested in order ... des lieux de pêche sont établies au moyen des données STATLANT et des données à échelle précise de la ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 117–141 : Auteur(s): Kawaguchi, S., S. Nicol, K. Taki and M. Naganobu

8. An assessment of the mackerel icefish (Champsocephalus gunnari) off Heard Island

   sizes of maturity and a weight-length relationship. The results show that characteristics of C. gunnari ... tonnes for the Heard Plateau and 18 tonnes for Sliell Bank. An assessment based on the results of a ... survey conducted at the end of the 1997 fishing season would allow for a catch limit on the Heard Plateau ... C C A M L R Science, Vol. 5 (1998): 79-101 AN ... , including growth curves, natural mortality, ages and sizes of maturity and a weight-length relationship ... tonnes for Sliell Bank. An assessment based on the results of a survey conducted at the end of the 1997 ... fishing season would allow for a catch limit on the Heard Plateau of 900 tonnes in the 1997/98 season and ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 79–101 : Auteur(s): de la Mare, W.K., R. Williams and A.J. Constable

9. Preliminary model of krill fishery behaviour in Subarea 48.1

   :  A simple model of the behaviour of the krill fishery in FAO Statistical Subarea 48.1 (South Shetland ... catches in the subarea. A number of management scenarios are considered which involve the closure of (i) a ... , Australia V.H. Marin Depto. de Ciencias Ecologicas Universidad de Chile, Santiago, Chile Abstract A ... catches in the subarea. A number of management scenarios are considered which involve the closure of (i ... ) a radial zone 50 km offshore from the South Shetland Islands, and (ii) zones 100 km around ... antarctique). Les parametres du modPle sont derives des donnees de la p@cherie chilienne des annees 1989 a ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 71–79 : Auteur(s): Agnew, D.J. and V.H. Marín

10. Use of the Leslie stock depletion model for the assessment of local abundance of Patagonian toothfish (Dissostichus eleginoides)

    presents a re-working and synthesis of previous analyses to examine whether declines in CPUE can be ... modelled using a linear regression of catch per hook against cumulative catch, when single vessels operate ... consistent signal in the data for the depletion model to be used to estimate local abundance. A number of ... Georgia and the Pacific coast of Chile. This paper presents a re-working and synthesis of previous ... analyses to examine whether declines in CPUE can be modelled using a linear regression of catch per hook ... depletion model to be used to estimate local abundance. A number of possible explanations are considered ... d'epuisement de Leslie a 6te utilise pour examiner les tendances locales de la capture par unite d'effort de ...

    Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 55–77 : Auteur(s): Parkes, G., C.A. Moreno, G. Pilling and Z. Young

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