Search results
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Krill population biology during the 1991 Chilean Antarctic krill fishery
/ Description: Population biology of Antarctic krill, Euphausia superba, was studied from samples taken in 1991 ... size from 1.5 to 3 cm). Two subsamples of 100 specimens each were taken from 50 samples and analysed ... . The fishing ground was divided into two areas: Area A, north of the South Shetland Islands; and Area B ... , north of Elephant Island. The samples were grouped by time of capture: daytime, twilight and night-time ... area approximately 40 x 40 m), which was towed at a mean velocity of 2.65 knots for 5 to 95 minutes ... , at minimum depths between 25 to 100 m determined by a netsonde device mounted on top of the net ... biology of Antarctic krill, Euphausia superba, was studied from samples taken in 1991 during krill ... from 1.5 to 3 cm). Two subsamples of 100 specimens each were taken from 50 samples and analysed. The ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 223–235 : Author(s): Mujica R., A., E. Acuña S. and A. Rivera O.
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Antarctic krill and ecosystem management – from Seattle to Siena
values (SC-CAMLR, 1993). A CCAMLR-sponsored Workshop on Evalu- ating Krill Flux Factors in 1994 used ... / Description: This paper outlines CCAMLR’s development of a management approach for the Antarctic krill ... to be consistent with the objectives of the CAMLR Convention, particularly its Article II. Emphasis ... is given to the initiation of the CCAMLR Ecosystem Monitoring Program (CEMP) and the deliberations of ... CCAMLR statistical areas. This paper complements those of Constable (2002 – this volume) and Everson ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 175–212 : Author(s): Miller, D.G.M
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The ecosystem approach to managing fisheries: achieving conservation objectives for predators of fished species
predators of fished species Abstract / Description: Managing fisheries to achieve ecosystem objectives is ... for the recovery of depleted populations in food webs supporting fisheries. This paper addresses the ... of fished species, and (iii) what approaches could be considered for achieving the conservation ... objectives? The approach proposed here takes account of uncertainties in knowledge of the structure of ... a basis for future testing of a variety of candidate management procedures ainied at managing the ... availability, (ii) the effects of the fishery on the availability of krill to predators at critical times of ... needs of predators and support the fishery at the same time. In this case, competition would be ... maintain the predator production arising from the consumptioii of fished species at or above some limit ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 37–64 : Author(s): Constable, A.J
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Towards an initial operational management procedure for the krill fishery in Subareas 48.1, 48.2 and 48.3
be investigated, would remain the same. * Details of the program are available on request to the author 194 ... (Euphausia superba) in Subareas 48.1, 48.2 and 48.3 requires a basis for the assessment of resource status ... , and an algorithm for specifying the levels of regulatory mechanisms (e.g., a catch control law) that ... depends on the results of the assessment. The development and selection of a procedure requires a basis ... for the simulation testing of procedures, and an operational definition of CCAMLR Article II to ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 189–219 : Author(s): Butterworth, D.S.
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Directed research. Antarctic Marine Living Resources (AMLR). A program development plan
Antarctic ecosystem through international cooperation. US participation is aimed at realization of the ... program providing information needed for US policy regarding the conservation and management of the marine ... living resources in the ocean areas surrounding Antarctica. The program is in support of US participation ... in the Commission and Scientific Committee of the Convention for the Conservation of Antarctic Marine ... . participation is aimed at realization of the Convention's objective relating to the conservation of Antarctic ... MARINE LIVING RESOURCES (AMLR). A PROGRAM DEVELOPMENT PLAN Office of Science and Technology, NMFS ... , NOAA, U.S. Department of Commerce (U.S.A.) Abstract The U.S. Antarctic Marine Living Resources ... conservation and management of the marine living resources in the ocean areas surrounding Antarctica. The ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 363-373 : Author(s): Office of Science and Technology, NMFS, NOAA, US Department of Commerce (USA)
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Exploratory fishing for Dissostichus spp. in the Antarctic region (Subareas 48.1, 48.2 and 88.3)
as a percentage of the total number of stomachs containing food (Hynes, 1950; Hyslop, 1980). Maturity stages ... of the Southern Ocean. J.L.B. Smith Institute of Ichthyology, Grahamstown: 52-63. Hynes, H.B.N. 1950. The food ... del Fuego was conducted as part of the New Fisheries Projects developed by Chile, primarily to ... establish the presence of Dissostichus spp. in Subareas 48.1, 48.2 and 88.3. Industrial longlines (Spanish ... system) were used for the operation, with variable quantities of fish hooks (1 440 to 4 320), No. 9 ... Mustad Kirby type, set between depths of 600 and 2 550 m. Sardines (Sardinops sagax) and squid (Illex ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 1–17 : Author(s): Arana, P.M. and R. Vega
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Further computations of the consequences of setting the annual krill catch limit to a fixed fraction of the estimate of krill biomass from a survey
are considered. The model extensions requested by the Third Meeting make little difference to the results ... for a 20-year period. Three possible fishing seasons are considered. The model extensions requested ... extensions requested by the Third Meeting make little difference to the results of Butterworth et al ... for the fact D,,,, were requested. that krill growth varies systematically through the year. Specifically ... amendments the krill spawning biomass drops below a fraction requested by the Fourth Meeting of WG-Krill ... . The Third Meeting of that the three-month growth and fishing periods WG-Krill subsequently requested ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 81–106 : Author(s): Butterworth, D.S., G.R. Gluckman, R.B. Thomson, S. Chalis, K. Hiramatsu and D.J. Agnew
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The error of the biomass estimate as a function of survey parameters and the statistics of a density field of krill aggregations
into it), then biomaes esti~ate error might turn out to be higher than that desired for defined confidence probability ... Paper Title: The error of the biomass estimate as a function of survey parameters and the ... statistics of a density field of krill aggregations Abstract / Description: Simple relationships expressing ... the dependence of relative sampling error in a biomass estimate (from a survey) on the statistical ... characteristics of the fish concentration density field and on parameters of the survey itself, have been derived ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 213-228 : Author(s): Kizner, Z.I.
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Revised estimates of seabed areas within the 500 m isobath of the South Orkney Islands (subarea 48.2) and consequences for standing stock biomass estimates of nine species of finfish
Paper Title: Revised estimates of seabed areas within the 500 m isobath of the South Orkney ... Islands (subarea 48.2) and consequences for standing stock biomass estimates of nine species of finfish ... Abstract / Description: A revised bathymetric map of the South Orkney Islands (Subarea 48.2) was generated ... , areas of seabed within the 500 m isobath (i.e. 0-500 m) were computed for 50 m depth intervals. Areas ... . These databases were then used to compute bathymetric surface areas of seabed at 50 m intervals within ... range of each particular species. Given the significant increases in estimated seafloor at greater ... REVISED ESTIMATES OF SEABED AREAS WITHIN THE 500 M ISOBATH OF THE SOUTH ORKNEY ISLANDS (SUBAREA 48.2) AND ... CONSEQUENCES FOR STANDING STOCK BIOMASS ESTIMATES OF NINE SPECIES OF FINFISH C.D. Jones National Oceanic ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 197–204 : Author(s): C.D. Jones
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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 ... paucity of biomass estimates and the mostly qualitative nature of food studies. Food consumption estimates ... resource for skates and slope and deep-sea fishes such as grenadiers at certain times of the year ... . Krill forms a substantial part of the diet of the skate Amblyraja georgiana at South Georgia ... (Matthews, 1978). As a by-product of whaling, fish served as local food at the whaling stations and were ... populations already being depleted at the time of the estimate) varied from 10 000 000 to 25 000 000 tonnes ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 115–169 : Author(s): Kock, K.-H., E. Barrera-Oro, M. Belchier, M.A. Collins, G. Duhamel, S. Hanchet, L. Pshenichnov, D. Welsford and R. Williams