Résultats de la recherche

1. Liste officielle des mesures de conservation en vigueur saison 1999/2000

   au 5 novembre 1999) Le présent document dresse la liste des mesures de conservation adoptées par la Commission ... DE CONSERVATION 170/XVIII Système de documentation des captures de Dissostichus spp ... de contrôle automatique des navires par satellite (VMS) Toutes zones Toutes les pêcheries sauf celle du krill ... Indéterminée 170/XVIII Système de documentation des captures de Dissostichus spp. Toutes zones Dissostichus ...

   Document : Site Section: Publications

2. Can we satisfactorily estimate variation in krill abundance?

   from data reported to the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR ... Paper Title:  Can we satisfactorily estimate variation in krill abundance? Abstract / Description ... :  Knowledge of abundance and rates of change of abundance are basic requirements for fisheries models. Catch ... per unit effort (CPUE) has traditionally been used in demersal fisheries assessments as an estimator ... abundance. It is less satisfactory for pelagic fisheries. Evidence is given that CPUE estimated from data ... SATISFACTORILY ESTIMATE VARIATION IN KRILL ABUNDANCE?* I. Everson1 (United Kingdom) Abstract Knowledge of ... abundance and rates of change of abundance are basic requirements for fisheries models. Catch per unit ... effort (CPUE) has traditionally been used in demersal fisheries assessments as an estimator of ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 375-376 : Auteur(s): Everson, I.

3. Spatial distribution of management measures, Antarctic krill catch and Southern Ocean bioregions: implications for conservation planning

   Paper Title:  Spatial distribution of management measures, Antarctic krill catch and Southern ... between habitat (bioregion), existing spatial management and Antarctic krill catch in the Southern Ocean ... . The analysis required standardised information on the location and extent of spatial fisheries ... distribution of catch within the open fraction. For example, only 26% of the total area open to krill fishing ... , including data on habitat types, fisheries catch and existing spatial management. This paper demonstrates ... how standardised geo- graphic information on spatial management can be used with data on fisheries ... bioregionalisa- tion as an indicator of habitat, and catch data for Antarctic krill, Euphausia superba ... shelf break, and in frontal zones. The analyses performed in this study used weighted krill catch data ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 1–19 : Auteur(s): Grant, S.M., S.L. Hill and P.T. Fretwell

4. Krill fishing in the Scotia Sea in relation to bathymetry, including the detailed distribution around South Georgia

   on fine-scale (0.5 o latitude x 1 o longitude) data show that harvesting in the Scotia Sea has been ... . Although these data give a general idea of where the fishery has operated, they do not reveal the localised ... trawl statistics have been recorded in the South Georgia area. Analyses of these data show marked ... interannual variability in the distribution of trawls. The data for 1993 were only available from August but ... understand what factors control the distribution of krill. Analyses of fisheries data have often been used ... of restricted temporal extent. There are few data available where krill have been studied over more ... resolved by one-off discrete sampling surveys. A number of studies have already used krill-fishery data ... analyse the krill fishery have been in two forms; subarea or STATLANT data, and fine-scale (0.5 ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 1–17 : Auteur(s): Murphy, E.J., P.N. Trathan, I. Everson, G. Parkes and F.H.J. Daunt

5. Chilean krill fishery: analysis of the 1991 season

   data and its use in studying small-scale spatial distribution of catches. The results show that krill ... paper summarises Chilean catch data for 1991. Special emphasis is given to the analysis of haul-by-haul ... fishing in Subarea 48.1 is particularly intense near CEMP sites. Other ways of using of haul-by-haul data ... Paper Title:  Chilean krill fishery: analysis of the 1991 season Abstract / Description:  This ... : Species of fish found as by-catch during krill fishing in Subarea 48.1 (1991 season). Data from ... haul-by-haul data are suggested. Resume Le present document recapitule les donnees de capture ... fish. These data are currently being analysed. A total of 169 hauls were analysed for by-catch. Adult ... General Overview During the 1991 fishing season Chile sent one factory vessel to fish for krill in ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 273–287 : Auteur(s): Marín, V.H., A. Mujica and P. Eberhard

6. Estimating optimal observer coverage in the Antarctic krill fishery

   estimate parameters of interest, in this case the mean (or median) krill length and the rate of larval fish ... and between-haul variance was estimated. For krill mean length and larval fish by-catch rate, between ... / Description:  Data collected as part of the CCAMLR Scheme of International Scientific Observation from ... % of total hauls per vessel per season and 31% per vessel per season for larval fish. Between-vessel ... length of krill and the fish larval by-catch rate. Second, to determine how many years of data ... strategy, using data on mean krill length and fish by-catch rates. This allowed insight into the levels ... . Larval fish by-catch CCAMLR data were collected following the introduction of the new larval fish ... -catch (i.e. the data were summed across fish species). Data for other species groups (e.g. amphi- pods ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 139–154 : Auteur(s): Agnew, D.J., P. Grove, T. Peatman, R. Burn and C.T.T. Edwards

7. A composite recruitment index to describe interannual changes in the population structure of Antarctic krill at South Georgia

   on density data derived from acoustic surveys and on length-frequency data obtained from either ... and length data are derived from standard station net hauls only. Comparison of these indices showed ... target net haul data can be included by using the composite recruitment index. This index is used to ... structure of Antarctic krill at South Georgia Abstract / Description:  A composite recruitment index based ... Japanese fisheries data in Subareas 48.1, 48.2 and 48.3 dur ing 1980 through 1997. Document WG-EMM-98 ... obtaining acoustic estimates of krill density that can be used to transform the length-frequency data into ... effect of this area it is vital that more data be collected on the population structure of krill from ... collect krill length data, in particular I wish to thank Helen Hill and Heather Daly who not only helped ...

   Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 71–84 : Auteur(s): Watkins, J.L

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

   ) the degree to which information on biological relationships is considered; (ii) the cost of data ... Paper Title:  Alternative methods for determining subarea or local area catch limits for krill in ... precautionary catch limit on krill (Euphausia superba) in Statistical Area 48. The measure also implies an ... methods of determining subarea or local area krill catch limits are evaluated relative to six criteria: (i ... consider the relationships between krill and dependent predators. The seabed area data presented in ... not make an explicit consideration of krill-predator interactions, so data collection costs and ... between krill and land-breeding predators during the predators' reproductive phases. Data are already ... estimates of krill biomass will incur substantial long-term costs associated with data collection. It is ...

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

9. Effects of recruitment variability and natural mortality on generalised yield model projections and the CCAMLR decision rules for Antarctic krill

   proportional recruitment of krill. In this study, krill sampling data for empirical size frequencies were ... projections and the CCAMLR decision rules for Antarctic krill Abstract / Description:  The generalised yield ... model (GYM) was used by CCAMLR to establish the precautionary catch limit for the Antarctic krill ... krill around the Antarctic Peninsula (Subarea 48.1) along with increasing rates of natural mortality ... proportional recruitment of krill. In this study, krill sampling data for empirical size frequencies were ... recruitment variability. Methods Krill data Annual research cruises to sample krill popula- tions in four ... Antarctic krill biomass in the South Shetland Islands, through 2011. Document WG-EMM-11/26. CCAMLR ... and C. Reiss. 2011. Modelling Antarctic krill: scale, movement, and age-structure. Document WG-EMM ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 81–96 : Auteur(s): Kinzey, D., G. Watters and C.S. Reiss

10. A first step towards modelling the krill–predator dynamics of the Antarctic ecosystem

    ecosystem Abstract / Description:  The history of human harvests of seals, whales, fish and krill in the ... former. A reference case and six sensitivities are fitted to available data on predator abundances and ... Paper Title:  A first step towards modelling the krill–predator dynamics of the Antarctic ... Antarctic is summarised briefly, and the central role played by krill emphasised. The background to the ... , whales, fish and krill in the Antarctic is summarised briefly, and the central role played by krill ... the diet composition of crabeater seals to be 94% krill, 3% fish and 2% squid, based on samples ... fish, and the amount of krill and fish consumption differs greatly between regions. However, as more ... exists to estimate the abundances and hence consumption of krill by cephalopods, fish and birds for the ...

    Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 217–277 : Auteur(s): Mori, M. and D.S. Butterworth

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