Search results
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A declining trend in the abundance of Notothenia rossii marmorata and Notothenia gibberifrons observed in fjords in two sites in the South Shetland Islands
Paper Title: A declining trend in the abundance of Notothenia rossii marmorata and Notothenia ... gibberifrons observed in fjords in two sites in the South Shetland Islands Abstract / Description: A declining ... two sites in the South Shetland Islands (Subarea 48.1), is analyzed by a nested ANOVA and demonstrated ... , King George/25 de Mayo I., over a period of eight years from 1983 to 1990 and in waters around Half ... WG-FSA-90/14 A DECLINING TREND IN THE ABUNDANCE OF ... SHETLAND ISLANDS E. Barrera-Oro and E. Marschofr Abstract A declining trend observed in the abundance ... Shetland Islands (Subarea 48.1), is analyzed by a nested ANOVA and demonstrated as significant. The ... ., over a period of eight years from 1983 to 1990 and in waters around Half-Moon 1., Moon Bay, in 1989 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 263–274 : Author(s): Barrera-Oro, E. and E. Marschoff
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Bias in the estimation of krill yield from using a deterministic formulation of the median unexploited spawning biomass
Paper Title: Bias in the estimation of krill yield from using a deterministic formulation of the ... model as a basis for setting catch limits in the krill fishery, while the GYM is used for assessing ... effects of a specified long-term annual yield on (i) the probability of the spawning stock being reduced ... below a set proportion of the median pre-exploitation spawning biomass during a projection trial and (ii ... ESTIMATION OF KRILL YIELD FROM USING A DETERMINISTIC FORMULATION OF THE MEDIAN UNEXPLOITED SPAWNING BIOMASS ... the stock being assessed. CCAMLR currently uses results from the krill yield model as a basis for ... fisheries but can also be used for krill. The decision rules relate to the effects of a specified long-term ... annual yield on (i) the probability of the spawning stock being reduced below a set proportion of the ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 1–8 : Author(s): Constable, A.J. and W.K. de la Mare
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Towards the development of a management plan for mackerel icefish (Champsocephalus gunnari) in Subarea 48.3
Paper Title: Towards the development of a management plan for mackerel icefish (Champsocephalus ... years of poor krill availability. Thus natural ortality of C. gunnari may, in some years, increase by a ... outlines a scheme which would use information from studies on krill and predators undertaken as part of the ... . Full implementation of such a scheme would require greater knowledge of quantitative aspects of food ... DEVELOPMENT OF A MANAGEMENT PLAN FOR THE MACKEREL ICEFISH (CHAMPSOCEPHALUS GUNNARI) IN SUBAREA 48.3 D.J ... of poor krill availability. Thus natural mortality of C. gunnari may, in some years, increase by a ... outlines a scheme which would use information from studies on krill and predators undertaken as part of ... . gunnari. Full implementation of such a scheme would require greater knowledge of quantitative aspects ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 63–77 : Author(s): Agnew, D.J., I. Everson, G.P. Kirkwood and G.B. Parkes
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Calibration of an acoustic echo-integration system in a deep tank, with system gain comparisons over standard sphere material, water temperature and time
Paper Title: Calibration of an acoustic echo-integration system in a deep tank, with system gain ... outlines the theory and procedures for calibrating an echo integration acoustic system with a standard ... sphere. It presents the results of an extensive calibration of a Simrad EK500 scientific echosounder with ... a 120 kHz split-beam transducer in a refrigerated 10 m deep tank. Calibration parameters are studied ... -INTEGRATION SYSTEM IN A DEEP TANK, WITH SYSTEM GAIN COMPARISONS OVER STANDARD SPHERE MATERIAL, WATER ... procedures for calibrating an echo integration acoustic system with a standard sphere. It presents the ... results of an extensive calibration of a Simrad EK500 scientific echosounder with a 120 kHz split-beam ... transducer in a refrigerated 10 m deep tank. Calibration parameters are studied in relation to sphere ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 127–144 : Author(s): Demer, D.A. and R.P. Hewitt
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A possible framework in which to consider plausible models of the Antarctic marine ecosystem for evaluating krill management procedures
Paper Title: A possible framework in which to consider plausible models of the Antarctic marine ... ecosystem for evaluating krill management procedures Abstract / Description: CCAMLR is developing a ... management procedure for the krill fishery, including the evaluation of candidate management procedures in a ... simulation framework, using plausible models of the Antarctic marine ecosystem. This paper develops a ... (2005): 99–117 99 A POSSIBLE FRAMEWORK IN WHICH TO CONSIDER PLAUSIBLE MODELS OF THE ANTARCTIC MARINE ... – andrew.constable@aad.gov.au Abstract CCAMLR is developing a management procedure for the krill fi shery ... , including the evaluation of candidate management procedures in a simulation framework, using plausible ... models of the Antarctic marine ecosystem. This paper develops a framework for erecting such models. It ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 99–117 : Author(s): Constable, A.J
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A stock assessment model of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea Region incorporating multi-year mark-recapture data
Paper Title: A stock assessment model of Antarctic toothfish (Dissostichus mawsoni) in the Ross ... hence a multi-year mark-recapture tagging program was initiated by New Zealand fishing vessels in 2001 ... abundance from a single release and subsequent recapture events. An integrated Bayesian stock assessment ... showed the data selection provided a precautionary estimate of biomass, and that these estimates were ... distribution is circumpolar, although D. mawsoni have a more southern distribution and are found in latitudes ... ) is defined to include the area between 150°E and 150°W. A distinct fishery also operates further ... (2014): 39–62 39 A stock Assessment model of AntArctIc toothfIsh (Dissostichus mawsoni) In the ross ... seA regIon IncorporAtIng multI-yeAr mArk-recApture dAtA S. Mormede and A. Dunn National ...
Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 39–62 : Author(s): Mormede, S., A. Dunn and S.M. Hanchet
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A potential feedback approach to ecosystem-based management: Model Predictive Control of the Antarctic krill fishery
Paper Title: A potential feedback approach to ecosystem-based management: Model Predictive ... Control of the Antarctic krill fishery Abstract / Description: CCAMLR aims to develop a feedback approach ... whether a feedback approach is likely to achieve the multiple objectives that EBM implies in the complex ... Control (MPC) to achieve objectives for a harvested species, its predators and the fishery, in a ... CCAMLR aims to develop a feedback manage- ment approach for the Antarctic krill fishery in the Scotia ... a potential catch limit equivalent to 7% of current global fisheries landings (Hill, 2013a ... - ment derive from control theory (Cunningham and CCAMLR Science, Vol. 20 (2013): 119–137 119 A ... aims to develop a feedback approach to aid ecosystem-based management (EBM) of Antarctic krill ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 119–137 : Author(s): Hill, S.L. and M. Cannon
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A hybrid approach to acoustic classification and length estimation of krill
Paper Title: A hybrid approach to acoustic classification and length estimation of krill Abstract ... considered. A euphausiid aggregation is represented by a three-dimensional probabilistic vector whose ... individually for each component of a vector, using classical Bayesian techniques. Classification probabilities ... is derived from a fluid-sphere model. The effectiveness of the method is demonstrated by comparing ... . 11 (2004): 33–58 33 A HYBRID APPROACH TO ACOUSTIC CLASSIFICATION AND LENGTH ESTIMATION OF KRILL ... problem of acoustically identifying and estimating the sizes of two euphausiid species is considered. A ... euphausiid aggregation is represented by a three-dimensional probabilistic vector whose components are the ... component of a vector, using classical Bayesian techniques. Classifi cation probabilities are derived by ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 33–58 : Author(s): Azzali, M., I. Leonori and G. Lanciani
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A preliminary investigation of the possible effects of rhizocephalan parasitism on the management of the crab fishery around South Georgia
Paper Title: A preliminary investigation of the possible effects of rhizocephalan parasitism on ... levels of infection by a rhizocephalan barnacle have been found in the population of the crab Paralomis ... spinosissima, which has been harvested by a new fishery around South Georgia (Subarea 48.3) since 1992. One of ... possible implications of parasitism for management are investigated by considering a population model that ... CCAMLR Science, Vol. 1: 175-192 A PRELIMINARY ... Relatively high levels of infection by a rhizocephalan barnacle have been found in the population of the ... crab Paralomis spinosissima, which has been harvested by a new fishery around South Georgia (Subarea ... considering a population model that captures the main characteristics of the system. An age-based host ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 175–192 : Author(s): Basson, M
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The sensitivity of multiple output statistics to input parameters in a krill–predator–fishery ecosystem dynamics model
Paper Title: The sensitivity of multiple output statistics to input parameters in a krill ... –predator–fishery ecosystem dynamics model Abstract / Description: There is a global need to develop ... stock or the fishery. Output statistics were most sensitive to a parameter controlling predator ... recruitment through pre-recruit mortality. A parameter mediating the effect of a forcing function on krill ... Watters et al. (2013) describe a spatially resolved stochastic simulation model representing one prey ... and target species, its natural predators and a fishing fleet. Its authors developed this model to ... directly important to the focal species and therefore resembles a minimum realistic model (Plagányi ... means a mathematical representation of a hypothesis about ecosystem dynamics consisting of a model and ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 97–118 : Author(s): Hill, S.L. and J. Matthews