Search results
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A model at the level of the foraging trip for the indirect effects of krill (Euphausia superba) fisheries on krill predators
Abstract: 1. Although the development of fisheries for krill in the southern oceans has prompted ... relative comparisons of penguin reproductive success and adult survival in the absence or presence of a ... spatial-temporal structure, determined by diffusion and advection, to krill availability in relation to ... distribution of available krill. 4. We assume that after fledging, offspring survival depends in part upon the ...
Meeting Document : WG-EMM-96/20 : Author(s): Switzer, P.V., Mangel, M.
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Circumpolar connections between Antarctic krill (Euphausia superba Dana) populations: Investigating the roles of ocean and sea ice transport
in the Southern Ocean. Krill have a close association with sea ice which provides access to a ... critical food source and shelter, particularly in the early life stages. Advective modelling of transport ... potential roles of the ocean and sea ice in maintaining the observed circumpolar krill distribution. We show ... that the Antarctic Coastal Current is likely to be important in generating the large-scale distribution ...
Meeting Document : WG-EMM-07/P10 : Author(s): S.E. Thorpe, E.J. Murphy and J.L. Watkins (United Kingdom)
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Modeling the growth dynamics of Antarctic krill
processes included in the model were ingestion, assimilation efficiency, a baseline respiration. respiratory ... resulted in the transfer of individuals to the next highest size class (growth), whereas negative net ... production resulted in transfer to the next smallest size class (shrinkage). Size-dependent parameterizations ... in the current literature. The model was forced with an environmental time series of food (pelagic ...
Meeting Document : WG-EMM-96/68 : Author(s): Lascara, C.M., Hofmann, E.E.
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An evaluation of reduced target strength estimates reported for krill (Euphausia superba)
derived from them. Their results can be shown to have significant weaknesses in both data used and ... assumptions made in calculating target strength. Whether the results of these papers are valid is critically ... in the Antarctic. The weaknesses in their data stem from the methods used to calculate target ... strength from the data and fall into three categories: 1) Errors in measurements and assumptions; 2 ...
Meeting Document : WG-KRILL-90/13 : Author(s): M.C. Macaulay (USA)
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Hydroacoustic surveys of the distribution and abundance of krill: Prydz Bay region – FIBEX, ADBEX II and SIBEX II
Dana, were undertaken in the Prydz Bay region, Antarctica. Three surveys were carried out south of 60°S ... of error in the echointegration technique are presented. Quantitative data are presented on the ... abundance (biomass) of krill in the Prydz Bay region as a whole and the weight density of krill along each ... cruise track is presented in graphical form. These data demonstrate a patchy density distribution with ...
Meeting Document : SC-CAMLR-VII/BG/40 : Author(s): Delegation of Australia
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Report on bottom fisheries and vulnerable marine ecosystems: draft template and workplan
Vulnerable Marine Ecosystems to WG-EMM and WG-FSA in 2010. This paper provides a draft template, including ... the workplan and discussion. It has been compiled by the Subgroup for consideration at WG-EMM in 2010 ... of VMEs, resulting in the following structure to replicate that approach: (i) Details of Bottom ... Scientific Committee and its working groups have been embedded within this structure in order to give them a ...
Meeting Document : WG-EMM-10/15 : Author(s): WG-FSA Subgroup on VMEs
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The orderly development of the krill fishery
in Statistical Division 58.4.2 Australia noted that while the scientific data supported an increase ... , such a large increase required the inclusion of other elements in the conservation measure to ... considers critical to the orderly and precautionary development of the krill fishery. In summary Australia ... recommends that: o Krill stock surveys be undertaken in areas with no precautionary catch limits in order to ...
Meeting Document : CCAMLR-XXVI/30 : Author(s): Delegation of Australia
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Progress towards a trophic model of the ecosystem of the Ross Sea, Antarctica, for investigating effects of the Antarctic toothfish fishery
Ross Sea is a low primary production system, with production being localised in space and time. In the ... considered a work in progress. Overall, the model is close to balance, with total exports of organic carbon ... balanced, due in part to limited information on diet fractions of Ross Sea organisms. Methods to adjust ... considerable predation pressure on some species of demersal fish. The significance of toothfish in the diets of ...
Meeting Document : WG-EMM-06/14 : Author(s): M. Pinkerton, S. Hanchet and J. Bradford-Grieve (New Zealand)
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A review of methodologies aimed at avoiding and/or mitigating incidental catch of protected seabirds.
fisheries interactions have been released in a variety of local, national and international media. Recent ... published reviews in the field of bycatch mitigation have typically had a species or fishing method focus ... interactions with fishing gear in New Zealand fisheries and fisheries that operate using similar methodologies ... for the fisheries management made, and areas for further research in New Zealand identified. Factors ...
Meeting Document : WG-FSA-05/P8 : Author(s): Bull, L.
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Developing integrated assessments for Dissostichus eleginoides based on the CCAMLR precautionary approach
Abstract: This paper describes a possible method for implementing the precautionary approach in ... Dissostichus eleginoides in Division 58.5.2. CASAL and GYM are key elements in the implementation described in ... this paper but the methodology is laid out in such a way that alternative software solutions could be ... used in either or both of their places. The framework for this procedure has four main components. The ...
Meeting Document : WG-FSA-SAM-05/16 : Author(s): I. Ball and A.J. Constable (Australia)