Search results
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Proposal for a winter longline survey of Antarctic toothfish in Subarea 88.1 SSRUs B–C in 2016
Abstract: We propose to conduct a scientific survey during the austral winter in the northern ... Ross Sea region to investigate spawning dynamics of Antarctic toothfish, as requested by the Scientific ... Committee in 2013. The longline survey is designed to cover key gaps in the knowledge of the life cycle of ... Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea by collecting biological samples from a range of ...
Meeting Document : WG-SAM-15/47 : Author(s): S.J. Parker, S.M. Hanchet and R.J.C. Currey (New Zealand)
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An index of per capita recruitment
)eM where R1 is the proportion of age-1 animals sampled in year y and M is the post-recruit mortality ... rate. The intent of the index is to facilitate investigation of reproductive success and the factors ... postulated to affect it. The formulation of PCR is based on the assumptions that: 1) post-recruit mortality ... the population is available; and 4) the proportion of age-1 animals in the sample can be determined ...
Meeting Document : WG-EMM-99/50 : Author(s): R. Hewitt (USA)
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SUMMER SURVEY OF FUR SEALS AT PRINCE EDWARD ISLAND, SOUTHERN INDIAN OCEAN
Abstract: The onshore distributions and the abundances of Antarctic fur seals Arctocephalus ... December 2008. This repeats a survey conducted in December 2001 and extends the area surveyed to include ... the entire south-west coast of Prince Edward Island. Of the two colonies of Antarctic fur seals, the ... Subantarctic fur seals and putative hybrids. The other Antarctic fur seal breeding colony at Penguin Beach ...
Meeting Document : WG-EMM-10/P15 : Author(s): M.N. Bester, P.G. Ryan and J. Visagie
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Modelling growth and reproduction of Antarctic krill: implications of spatial and temporal trends in temperature and food for ecosystem-based management of krill fisheries
Abstract: Errors in the growth model used in stock assessments of Antarctic krill, specifically ... higher rates of growth than occur in reality, could inadvertantly lead to over-exploitation of the krill ... population and cause impacts on krill predators. We review the three classes of models available for ... modelling krill growth – the von Bertalanffy class, the moult-cycle class based on measures of the duration ...
Meeting Document : WG-EMM-12/38 : Author(s): A.J. Constable and S. Kawaguchi (Australia)
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A method to evaluate selection of Antarctic krill in towed fishing gears
Abstract: The pelagic trawlers involved in the fishery for Antarctic krill (Euphausia superba ... ) apply different trawl designs. Very little information exists on the size selectivity of E. superba ... is valuable information for the management of harvested marine stocks. Size selectivity data is ... traditionally collected during timely and costly fishing experiments in the field where one design is tested at ...
Meeting Document : WG-EMM-13/34 : Author(s): L.A. Krag, B. Herrmann (Denmark), S. Iversen, A. Engås, S. Nordrum and B.A. Krafft (Norway)
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Domain 1 Marine Protected Area Preliminary Proposal PART A-2: MPA Model
Abstract: This document contributes to the planning process for the designation of a Domain 1 MPA ... led by Argentina and Chile. Specifically, this paper describes the rationale behind the development of ... the Domain 1 MPA model, which was based on the identification of Priority Areas for Conservation (PAC ... , which was introduced and discussed during WG-EMM 2017. Given the complexity of Domain 1 and the large ...
Meeting Document : SC-CAMLR-XXXVI/18 : Author(s): Delegations of Argentina and Chile
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Peak mortality of krill, fished with midwater trawls and feasible criteria of krill trawls ecological safety
Abstract: The mathematical model of a fishery object contact against a mesh, while escaping ... through a trawl chafer, is presented. Based on it t the equations are provided to calculate the object ... elimination probability caused by cath and mortality in fishery operations. The coefficient of trawl ... ecological safety is offered, which is the ratio of the amount of the objects caught and objects caught and ...
Meeting Document : WG-KRILL-93/34 : Author(s): Yu. V. Kadilnikov (Russia)
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Geographical aspects of utilising resources of krill (Euphausia superba)
Abstract: This paper presents data on the distribution of E. superba in the Atlantic sector and ... adjacent waters with an emphasis on subregions lying beyond the current fishing grounds of the Scotia Sea ... . In a number of subregions on the periphery of the Weddell Gyre (both to the north and south), as well ... as in the coastal waters of the Antarctic continent, the formation of krill aggregations is variable ...
Meeting Document : WG-EMM-96/05 : Author(s): Makarov, R.R.
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Educational poster on hook ingestion
Abstract: Since the 2001/2002 season CCAMLR has recognised the importance of the high level of ... large enough to swallow fish heads whole (SC-CAMLRR-XXI/BG/7). For example, in 2001/02 the scientific ... observer on the F/V Argos Helena estimated that >15,000 fish heads were discarded with hooks still in ... them. The hooks found in albatross colonies at South Georgia in years prior to 2001/02 were of the type ...
Meeting Document : WG-FSA-07/20 : Author(s): G. Robertson (Australia)
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Monitoring krill population variability using seabirds and seals at South Georgia – new samplers provide new insights
Abstract: Variability in the Southern Ocean is often characterised by fluctuations in the ... South Georgia interannual variability in the krill-based marine ecosystem has historically been most ... frequently detected in the response of upper-trophic level predators. Analysis of the changes in the ... population size structure of krill in the diet of Antarctic fur seals Arctocephalus gazella, particularly ...
Meeting Document : WG-EMM-04/63 : Author(s): K. Reid, E.J. Murphy, J.P. Croxall and P.N. Trathan (United Kingdom)