Search results
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Fish and invertebrate by-catch from Australian fisheries for D. eleginoides and C. gunnari in Division 58.5.2
Islands in CCAMLR Statistical Division 58.5.2. These comprise a trawl and a longline fishery for the ... gunnari. This paper presents available by-catch information for the three fisheries including estimates of ... . Preliminary results from a rajid tagging program are also presented. Total removals of by-catch in the trawl ... caught in the D. eleginoides trawl fishery and 107 tonnes in the C. gunnari trawl fishery. These values ...
Meeting Document : WG-FSA-03/73 : Author(s): E.M. van Wijk and R. Williams (Australia)
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Marine debris, entanglements and hydrocarbon soiling at Bird Island and King Edward Point, South Georgia, Signy Island, South Orkneys and Goudier Island, Antarctic Peninsula, 2010/11
Island, South Orkneys for the period April 2010 to March 2011. Surveys were also undertaken at Goudier ... hydrocarbon soiling at this location during the reporting period. Surveys of beached marine debris at Bird ... summer 2010/11 (January to March 2011). Plastic was the most commonly observed item during the two ... seasons at Bird Island, and the majority of items collected at Signy Island were wood/lumber ...
Meeting Document : SC-CAMLR-XXX/BG/05 : Author(s): Delegation of the United Kingdom
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Uncertainty in echosounder calibrations
Abstract: Calibration of echo sounders for fish stock assessment are commonly performed using the ... standard sphere method (Johannesson and Mitson, 1983; Simmonds et al., 1984). To determine the accuracy of ... the method, direct measurements of target strength (TS) were made of three standard spheres (Copper ... (Cu)- 23.0 mm and tungsten carbide (WC)- 33.0 mm and 38.1 mm). At the best case range of 5 m, the TS ...
Meeting Document : WG-EMM-96/40 : Author(s): Soule, M.A., Demer, D.A.
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Towards a strategic framework for assessing uncertainty in ecosystem dynamics models: objectives are sensitive too
candidate feedback management approaches for the Antarctic krill fishery in the southern Drake Passage and ... Scotia Sea. The Foosa ecosystem dynamics model was developed to perform spatially resolved, stochastic ... simulations of krill, its predators and fishery. It has been used to provide advice on the spatial allocation ... of the precautionary catch limit for krill. Foosa might therefore be a suitable simulation platform ...
Meeting Document : WG-EMM-12/20 Rev. 1 : Author(s): S. Hill and J. Matthews (United Kingdom)
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Mitigation of Macrourus by-catch in research block 58.4.1_6 and estimation of Macrourus biomass and sustainable catch in Divisions 58.4.1 and 58.4.2
Abstract: Macrourus spp. are the major by-catch species in the exploratory toothfish fishery in ... ) avoidance, ii) mitigation and iii) the setting of sustainable by-catch limits if mortality is not ... preventable (SC-CAMLR-XXII, paragraph 5.230). Here, we undertake a risk assessment of the effects of ... block 58.4.1_6 in particular. We investigate the distribution of D. mawsoni and Macrourus spp. catch ...
Meeting Document : WG-FSA-17/23 : Author(s): D. Maschette, P. Burch, P. Yates and P. Ziegler
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Norwegian Cruise to Kong Håkons VII Hav 28 February – 10 April 2019
Abstract: Norwegian Polar Institute led a cruise to the Kong Håkons VII Hav 28th February-10 ... April 2019. Our focus area was the ocean south of 65°S east of 0° meridian and 13.5° E (Fig 1) with a ... focus on Astrid ridge. Our focus was to map and describe the whole ecosystem. During transit, we ... identification. The ROV transects made up the basis of our intensive study areas. Each intensive study area ...
Meeting Document : WG-EMM-2019/48 : Author(s): H. Steen
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CCAMLR scientific observation: tasks, priorities and time budget
Abstract: The workload of the tasks required in the CCAMLR Observer manual is assessed. The total ... time needed for the minimum amount of daily routine tasks was well above the capacity that an observer ... to undertake. The manual must be structured as its entirety so that the observer, only by following ... instructions in the manual, can produce the report and logbook data which is collected systematically and ...
Meeting Document : WG-EMM-07/26 : Author(s): S. Kawaguchi (Australia)
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Management plan for Site of Special Scientific Interest (SSSI) No. 1
Abstract: Management at Cape Royds aims to: • avoid degradation of, or substantial risk to, the ... values of the Area by preventing unnecessary human disturbance to the Area; • allow scientific research ... on the ecosystem, and in particular on the avifauna in the Area, while ensuring protection from over ... -sampling; • minimize the possibility of introduction of alien plants, animals and microbes into the Area ...
Meeting Document : WG-EMM-02/59 : Author(s): Secretariat
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Fish stock assessment survey in Subarea 48.3, 2004
Abstract: This report describes the activities and preliminary results of the 9th UK fish stock ... British Antarctic Survey scientists during January and February 2004. In addition to the random stratified ... bottom trawl survey the research was extended by a week in order that further investigations into the use ... of acoustic methods for the determination of icefish biomass could be undertaken. Following the ...
Meeting Document : WG-FSA-04/85 : Author(s): M. Belchier, M. Purves, M. Collins, S. Hawkins, T. Marlow, R. Mitchell, J. Szlakowski and J. Xavier (United Kingdom)
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Target strength of mackerel icefish (Champsocephalus gunnari) from a scattering model
Abstract: An anatomically detailed acoustic scattering model has been used to estimate the ... cm, at 38 kHz. The model used computed tomography (CT) scans of fish to determine the sound speed and ... density throughout the fish and simulated the complex interaction of the incident sound wave with the ... acoustic impedance contrasts throughout the fish. A preliminary length to tilt-averaged TS relationship is ...
Meeting Document : SG-ASAM-09/06 : Author(s): G. Macaulay (New Zealand)