Search results
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Utilising data from ecosystem monitoring for managing fisheries: development of statistical summaries of indices arising from the CCAMLR Ecosystem Monitoring Program
Abstract: A potential method is presented for combining data collected as part of the CCAMLR ... ecosystem monitoring program (CEMP) into a single index for each of predator, prey and environmental ... parameters. The paper is divided into four main parts. The first part develops the proposed method of forming ... summary indices, which is based on the usual theory of multivariate statistics and takes into account the ...
Meeting Document : WG-EMM-00/14 Rev. 1 : Author(s): W. de la Mare and A. Constable (Australia)
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Estimation of the biomass of krill in Prydz Bay during January/February 1991, February/March 1992 and January/ February 1993 using echo integration
Abstract: Hydroacoustic surveys of the abundance of krill (Euphausia superba) in the Prydz Bay ... surveys indicated some association of krill with the shelf break in the western part of the survey area ... and the centre of the Prydz Bay region but also found that the shelf break was in general not a region ... of relatively high krill abundance. The mean surface density estimates of krill in 1991, 1992 and ...
Meeting Document : WG-Krill-94/21 : Author(s): T. Pauly and I. Higginbottom (Australia)
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STRUCTURE OF THE WATER MASSES AND KRILL DISTRIBUTION IN THE CENTRAL AND EASTERN PARTS OF THE ATLANTIC ANTARCTIC AREA
Abstract: The data of 18 expeditions fulfilled by AtlantNIRO during 1970-2000 in the central and ... eastern part of the Area 48 (Subareas 48.4 and 48.6) were summarized. Distribution of krill was analyzed ... with reference to the structure and dynamics of the water masses in the area of the Southern Sandwich ... Islands arc, the Bouveau Island, the Maude seamount, the southern part of the Lazarev Sea and up to the ...
Meeting Document : WG-EMM-11/24 : Author(s): V.N. Shnar and S.M. Kasatkina (Russia)
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Examination of the characteristics of the fishery for Dissostichus eleginoides in the CCAMLR Statistical Subarea 48.3 and its implications on estimating trends in catch per unit effort
eleginoides in Subarea 48.3. We concentrate on presenting the results of preliminary work on the potential ... effects of changing fishing patterns on the standardisation of the CPUE time series. We consider whether ... the spatial pattern of fishing might have changed over the years, whether the current measure of ... fishing effort (number of hooks on a line) has changed in its fishing properties over time, and if soak ...
Meeting Document : WG-FSA-SAM-05/17 : Author(s): A.J. Constable, S.G. Candy and B. Raymond (Australia)
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Accounting for food requirements of seabirds in fisheries management – the case of the South African purse-seine fishery
bergii. Availability of prey is thought to influence the populations of these species, but their food ... requirements have not been accounted for in management of the purse-seine fishery on sardine and anchovy. Means ... of identifying and attaining target populations of predators that are dependent on forage fish prey ... conservation status of a species may prove useful in determining minimum viable populations, and that the use ...
Meeting Document : WG-EMM-04/28 : Author(s): R.J.M Crawford (South Africa)
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CONDITIONING SMOM USING THE AGREED CALENDAR OF OBSERVED CHANGES IN PREDATOR AND KRILL ABUNDANCE: A FURTHER STEP IN THE DEVELOPMENT OF A MANAGEMENT PROCEDURE FOR KRILL FISHERIES IN AREA 48
Abstract: The updated version of the Spatial Multi-species Operating Model (SMOM) of krill ... -predator-fishery dynamics described in an accompanying paper is conditioned using the WG-SAM set of ... reference observations for Area 48 (the SAM calendar). Results are presented for two implementations of SMOM ... , one with the time series of krill abundance fixed on input, and the other incorporating an explicit ...
Meeting Document : WG-EMM-08/44 : Author(s): É.E. Plagányi and D.S. Butterworth (South Africa)
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Exploration of CPUE standardisation variances in the Ross Sea (Subareas 88.1 and 88.2A South of 70°s) Antarctic toothfish (Dissostichus mawsoni) exploratory longline fishery
Abstract: Catch rates or catch per unit of effort (CPUE) are used for data-poor exploratory ... interim of collecting sufficient tag recaptures. Here, we address the two questions: (1) which unit of ... such as gear type, vessel, fishing season, month, bait, fishing depth and area affect estimates of ... trend and magnitude of catch rates. Using data from the Ross Sea Antarctic toothfish fishery, we ...
Meeting Document : WG-SAM-2019/25 : Author(s): D. Maschette, S. Wotherspoon and P. Ziegler
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The relevance to CCAMLR of the UN Agreement relating to the Conservation and Management of Straddling Fish Stocks and Highly Migratory Fish Stocks
Abstract: This paper discusses the relevance to CCAMLR of the Agreement for the Implementation of ... the Provisions of the United Nations Convention on the Law of the Sea of 10 December 1982 Relating to ... the Conservation and Management of Straddling Fish Stocks and Highly Migratory Fish Stocks (UN ... Agreement). The principal provisions of the UN Agreement are examined and their potential effects on CCAMLR ...
Meeting Document : CCAMLR-XV/12 Rev. 1 : Author(s): Delegation of Australia
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Further calculations of the effects of krill fishing on predators
random component in the relationship between krill biomass and availability. An examination of the ... consequences in the case of the blackbrowed albatross suggest that these other factors result in yet lesser ... resilience of the albatross population to the effects of a krill fishery. An approach for estimating the ... parameters of functional relationships between survival rates and krill biomass (or availability) is ...
Meeting Document : WG-Krill-94/24 : Author(s): D.S. Butterworth and R.B. Thomson (South Africa)
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Estimation of the biomass of krill in Prydz Bay during January/February 1991 and February/March 1992 using echo integration
Abstract: Hydroacoustic surveys of the abundance of krill (Euphausia superba) in the Prydz Bay ... association of krill with the shelf break in the western part of the survey area but also found that the shelf ... break was in general not a region of relatively high krill abundance. The mean surface density of krill ... estimates of 1.95, 3.45 and 1.78 g/m2 for statistical areas 48.1, 48.2 and 48.3 (SC-CAMLR 1991, p47) but ...
Meeting Document : WG-KRILL-92/23 : Author(s): I. Higginbottom and T. Pauly (Australia)