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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 Title: Chilean krill fishery: analysis of the 1991 season Abstract / Description: This ... 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 ... haul-by-haul data are suggested. Resume Le present document recapitule les donnees de capture ... water) is a primary task for both WG-Krill and WG-CEMP. Haul-by-haul CPUE data from other fishing areas ... reported to CCAMLR. 1988-1990. Document wG-Krill-91/9. CCAMLR, Hobart, Australia. 277 Table 1 ... : Species of fish found as by-catch during krill fishing in Subarea 48.1 (1991 season). Data from ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 273–287 : Автор(ы): Marín, V.H., A. Mujica and P. Eberhard
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Estimating optimal observer coverage in the Antarctic krill fishery
Paper Title: Estimating optimal observer coverage in the Antarctic krill fishery Abstract ... / Description: Data collected as part of the CCAMLR Scheme of International Scientific Observation from ... conventional krill trawl vessels fishing in South Georgia (CCAMLR Subarea 48.3) were analysed using variance ... estimate parameters of interest, in this case the mean (or median) krill length and the rate of larval fish ... scheme for krill observers. However, this dilemma is fortunately not without precedent. Many fisheries ... length of krill and the fish larval by-catch rate. Second, to determine how many years of data ... observer data from krill fishing around South Georgia since 2002 were acquired from CCAMLR and pooled ... Mean krill length The availability of data on krill length is shown in Table A3, with mean krill ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 139–154 : Автор(ы): Agnew, D.J., P. Grove, T. Peatman, R. Burn and C.T.T. Edwards
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A composite recruitment index to describe interannual changes in the population structure of Antarctic krill at South Georgia
structure of Antarctic krill at South Georgia Abstract / Description: A composite recruitment index based ... 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 ... substantial differences, due in part to bias arising from a large number of krill in just one of the station ... 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 : Автор(ы): Watkins, J.L
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Alternative methods for determining subarea or local area catch limits for krill in Statistical Area 48
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 ... ) the degree to which information on biological relationships is considered; (ii) the cost of data ... 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 : Автор(ы): Watters, G. and R.P. Hewitt
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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 : Автор(ы): Kinzey, D., G. Watters and C.S. Reiss
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The role of fish as predators of krill (Euphausia superba) and other pelagic resources in the Southern Ocean (submitted to the 2008 Joint CCAMLR-IWC Workshop)
Paper Title: The role of fish as predators of krill (Euphausia superba) and other pelagic ... : Krill forms an important part of the diet of many Antarctic fish species. An understanding of the role ... of fish as krill predators in the Southern Ocean is critical to understanding how changes in fish ... region. First attempts to estimate the krill and pelagic food consumption by Antarctic demersal fish in ... predators, nor does it provide data on the effect of exploitation on fish as preda- tors of krill. As a ... summer data (Table 9). Winter data with respect to krill feeding species were available only for N ... Science, Vol. 19 (2012): 115–169 115 THE ROLE OF FISH AS PREDATORS OF KRILL (EUPHAUSIA SUPERBA) AND ... Road Cambridge CB3 0ET United Kingdom M.A. Collins Director of Fisheries/Senior Executive ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 115–169 : Автор(ы): Kock, K.-H., E. Barrera-Oro, M. Belchier, M.A. Collins, G. Duhamel, S. Hanchet, L. Pshenichnov, D. Welsford and R. Williams
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A first step towards modelling the krill–predator dynamics of the Antarctic ecosystem
Paper Title: A first step towards modelling the krill–predator dynamics of the Antarctic ... ecosystem Abstract / Description: The history of human harvests of seals, whales, fish and krill in the ... Antarctic is summarised briefly, and the central role played by krill emphasised. The background to the ... hypothesis of a krill surplus in the mid-20th century is described, and the information on population and ... reassessed the economic viability of their krill fisheries. A total of 6.1 million tonnes of krill was ... first step towArds modelling the krill–predAtor dynAmics of the AntArctic ecosystem M. Mori MARAM ... , whales, fish and krill in the Antarctic is summarised briefly, and the central role played by krill ... emphasised. The background to the hypothesis of a krill surplus in the mid-20th century is described, and ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 217–277 : Автор(ы): Mori, M. and D.S. Butterworth
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Environment–krill relations in the South Georgia marine ecosystem
agrees with other data which give direct or indirect indications of krill availability, suggesting it can ... Paper Title: Environment–krill relations in the South Georgia marine ecosystem Abstract ... study, time series of krill abundance (CPUE) indices were derived from Soviet fishing operations in the ... atmospheric components of the system, and there are also correlations with CPUE data. The CPUE index generally ... generally agrees with other data which give direct or indirect indications of krill availability ... krill concentration (British Antarctic Survey, unpublished data). In such areas krill fishing will ... number of fishing days by each vessel type. There were no data available for 1982. Krill fishing was ... Soviet vessels fish for krill during November or December, but catch data were not available for ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 13–30 : Автор(ы): Fedoulov, P.P., E. Murphy and K.E. Shulgovsky
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Factors to consider in developing management measures for krill
krill fisheries. Various possible elements of procedures such as reactive, predictive, and feedback ... Paper Title: Factors to consider in developing management measures for krill Abstract ... steps for the evolution of management procedures for krill fisheries. Various possible elements of ... krill should favour steady fisheries which are ecologically sustainable as well as economically ... importance of the fisheries. The strategy approaches outlined in this document all have various advantages ... WG-KRILL-90/14 FACTORS TO CONSIDER IN DEVELOPING ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 175–187 : Автор(ы): de la Mare, W.K.
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The sensitivity of multiple output statistics to input parameters in a krill–predator–fishery ecosystem dynamics model
Paper Title: The sensitivity of multiple output statistics to input parameters in a krill ... within CCAMLR to evaluate options for managing the Antarctic krill fishery in the Scotia Sea and southern ... recruitment through pre-recruit mortality. A parameter mediating the effect of a forcing function on krill ... plausible alternative hypotheses in data-poor situations. Apparent sensitivity is a function of both input ... statistics in a krill–predator–fishery ecosystem dynamics model multiple simulations and data processing. As ... krill, and it has an obli- gation to consider the effects of all fisheries on related and dependent ... validating and tuning operating models for krill fishery manage- ment in Area 48. Document WG-EMM-08/10 ... provide advice to CCAMLR on the spatial allocation of the Antarctic krill catch limit for the Scotia Sea ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 97–118 : Автор(ы): Hill, S.L. and J. Matthews
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