Resultados de la búsqueda
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Precautionary, ecosystem-based management for the Antarctic krill fishery: a work in progress
plan and timeline to further develop ecosystem-based management measures for the fishery. Review the ... improving identification of bycatch and for minimizing bycatch. Develop an accurate and consistent method ... provides an update on the krill fishery; discusses the consideration of climate change in krill fisheries ... information into fishery management. Obtain an up to date krill biomass estimate. Agree to a detailed work ...
Meeting Document : SC-CAMLR-XXXVII/BG/17 : Autor(es): Submitted by ASOC
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Alternative assessment methods for toothfish at South Georgia
toothfish abundance. An age structured production model (ASPM) is constructed and tuned to the CPUE series ... Abstract: We examine two alternatives to the survey recruitment/GY method for estimating ... CPUE that actually has been seen since 1996. Fitting the model to partial CPUE series, or assuming an ... : Alternative assessment methods for toothfish at South Georgia Approval: Approved ...
Meeting Document : WG-FSA-SAM-04/17 : Autor(es): Kirkwood, G., Payne, A., Agnew, D.
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Update of the Antarctic toothfish stock assessment for the Ross Sea by means of the TSVPA separable cohort model
Abstract: An updated Antarctic toothfish (in the Ross Sea) stock assessment was done by means of ... the TISVPA model (2006 data on catch-at-age and cpue and the data on tag recaptures were included ... Antarctic toothfish stock assessment for the Ross Sea by means of the TSVPA separable cohort model Approval ... to the Constable & de la Mare (1996) decision rules, annual catches of 23 000 tonnes per year are ...
Meeting Document : WG-SAM-07/9 : Autor(es): D. Vasilyev, K. Shust, V. Babayan and T. Bulgakova (Russia)
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Fish Heaven: a Monte Carlo, spatially explicit single species fishery model for the testing of parameter estimation methods
Abstract: Fish Heaven is a simple spatially explicit age structured fish model, containing the ... basic features of standard fish modeling with a number of optional extras. It was designed within an ... object oriented framework to allow for the possible extension in a number of directions. In particular it ... various plausible spatial structures of fish stock. The model has a simple age and space structured ...
Meeting Document : WG-FSA-00/36 : Autor(es): I. Ball and A. Constable (Australia)
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Variations in echosounder calibration with temperature, and some possible implications for acoustic surveys of krill biomass
implications for acoustic surveys of krill biomass Abstract / Description: Accurate estimation of krill ... those applied in the Antarctic, even after adjustments have been made to account for differences in ... -reported by 2.8 dB, leading in turn to an under-estimation of krill biomass by 52.5%. Every effort should ... prevailing within the area in which surveys are conducted. In addition, the implications for biomass ... . Here we present calibration data for an EK500 system at 38, 120 and 200 kHz collected over a number ... VARIATIONS IN ECHOSOUNDER CALIBRATION WITH TEMPERATURE, AND SOME POSSIBLE IMPLICATIONS FOR ACOUSTIC SURVEYS ... adjustments have been made to account for differences in sound speed between locations. Here we present ... settings, then integrated 120 kHz echo signals would be under-reported by 2.8 dB, leading in turn to an ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 273–281 : Autor(es): Brierley, A.S., C. Goss, J.L. Watkins and P. Woodroffe
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Update on software development for analysing nest camera images through the CEMP Special Fund
through the CEMP Special Fund project ‘Developing an image processing software tool for analysis of camera ... project for completion towards the end of 2018. Author(s): C. Southwell, H. Achurch, J. Cusick, A. Lashko ... Abstract: We provide a brief update on the software developed for assessing nest camera images ... software and develop post-processing code for data download according to specifications developed in ...
Meeting Document : WG-EMM-18/28 : Autor(es): C. Southwell, H. Achurch, J. Cusick, A. Lashko, K. Newbery, A. Sikka and L. Emmerson
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ALLOCATING THE PRECAUTIONARY CATCH LIMIT FOR KRILL AMONGST THE SMALL-SCALE MANAGEMENT UNITS IN AREA 48: THE IMPLICATIONS OF DATA UNCERTAINTIES
Abstract: Over the past few years WG-EMM has been developing a management procedure for the krill ... candidate methods for subdividing the catch limit and rejected one of them as unsuitable (Option 1 ... - subdivision based on the distribution of historical catches). In recognising the need for a “staged ... between these two (Option 4). In this paper we review the uncertainties relating to the spatial ...
Meeting Document : WG-EMM-08/12 : Autor(es): P.N. Trathan and S.L. Hill (United Kingdom)
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Introducing Casal2 for toothfish stock assessments
Abstract: The Casal2 software implements an updated generalised age-structured marine population ... constructed. Casal2 models can be used for a single population with a single anthropogenic event (i.e., a ... single fishery), or for multiple species and populations, areas, and/or anthropogenic or exploitation ... identical empirical results for estimation of key productivity parameters. We invite Members to test Casal2 ...
Meeting Document : WG-SAM-18/14 : Autor(es): S. Mormede
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A SIMULATION MODEL FOR EVALUATING MANAGEMENT STRATEGIES TO CONSERVE BENTHIC HABITATS (VULNERABLE MARINE ECOSYSTEMS) WHICH ARE POTENTIALLY VULNERABLE TO IMPACTS FROM BOTTOM FISHERIES
level that can naturally restore the original structure and function within 20 years. It does not ... ”, a categorisation fraught with difficulty. Instead, it means that habitats for which this would not ... easily be met would be more vulnerable than those for which the objective might be met most often. This ... paper develops a simulation model for this task, representing key properties of the benthic system such ...
Meeting Document : WG-SAM-09/21 : Autor(es): A.J. Constable (Australia)
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Fishing of the Patagonian toothfish (Dissostichus eleginoides) by the Chilean fleet (1991/92) in the Subarea 48.3 (South Georgia Island) and proposed TAC for the 1991/1993 season
, the fleet caught around 80% of the TAC set for this subarea. The catch and effort data and the ... biological sampling carried out on board the vessels operating in the region were used for the analysis. From ... Chilean fleet totalled 2.71 million hooks, 2 883 tonnes were caught at an average CPUE of 1.06 k/hook ... . The catch lengths distributions ranged between 40 and 145 cm for males and 40 and 200 cm for females ...
Meeting Document : WG-FSA-92/24 : Autor(es): P.A. Espina, M.A. Araya and V.V. Meniconi (Chile)