Résultats de la recherche
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LENGTH-BASED ASSESSMENT FOR THE MACKEREL ICEFISH (CHAMPSOCEPHALUS GUNNARI) IN SUB-AREA 48.3
Abstract: The current assessment method for the mackerel icefish (Champsocephalus gunnari) in sub ... -area 48.3 employs the CMIX and GYM packages, deriving population numbers-at-age then projecting these ... numbers forward under the given harvest control rule to set a two-year TAC. One issue is the accurate ... identification of cohorts from the survey model, given the differential age structures observed in the population ...
Meeting Document : WG-SAM-09/15 : Auteur(s): R.M. Hillary, D.J. Agnew and R. Mitchell (United Kingdom)
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IMPLEMENTATION OF FOOSA (KPFM) IN THE EPOC MODELLING FRAMEWORK TO FACILITATE VALIDATION AND POSSIBLE EXTENSION OF MODELS USED IN EVALUATING KRILL FISHERY HARVEST STRATEGIES THAT WILL MINIMISE RISK OF LOCALISED IMPACTS ON KRILL PREDATORS
-structured harvest strategies for krill, has been implemented within the EPOC modelling framework. It also ... shows how the parameters developed for use in FOOSA can be adapted for use in EPOC. The paper has three ... main parts – an outline of the structure of EPOC, consideration of the general FOOSA structure that ... needs to be implemented and a description of the implementation of FOOSA in EPOC. The latter section ...
Meeting Document : WG-SAM-08/15 : Auteur(s): A. Constable (Australia)
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An assessment of the mackerel icefish (Champsocephalus gunnari) off Heard Island
Abstract: Assessments of the abundance and potential yield of mackerel icefish (Champsocephalus ... gunnari) populations at Heard Island are developed from the results of four scientific surveys conducted ... in 1990, 1992, 1993 and 1997. The assessments include estimates of all the parameters required, based ... on the data collected during the surveys, including growth curves, natural mortality, ages and sizes ...
Meeting Document : WG-FSA-97/29 : Auteur(s): de la Mare, W.K., Constable, A., Williams, R.
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Modeling the growth dynamics of Antarctic krill
examine the growth dynamics of Antarctic krill, Euphausia superba. A system of coupled, ordinary ... differential equations was developed to describe the growth of krill between 2 and 60 mm. The metabolic ... 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 ...
Meeting Document : WG-EMM-96/68 : Auteur(s): Lascara, C.M., Hofmann, E.E.
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Pre-spawning and spawning biology of the Patagonian toothfish, Dissostichus eleginoides, around South Georgia (Subarea 48.3)
Abstract: Samples gathered from research expeditions of the longliners Medvezhy (April-June 1986 ... ) as well as Maksheevo and Mirgorod (June-July 1992) have produced new data on the biology of the ... reproductive part of the Dissostichus eleginoides population in Subarea 48.3. Analysis and synthesis of these ... data have established the bathymetric distribution patterns for different size-groups of toothfish ...
Meeting Document : WG-FSA-92/13 : Auteur(s): I.N. Konforkin and A.N. Kozlov (VNIRO, Moscow, Russia)
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A suggested bottom trawling survey on the Ob and Lena Banks
Abstract: The paper presents calculations of water flow velocity through the codend under the ... assumption that the flow is uniform and equal on its entire surface. The calculations were made for different ... opening coefficients. The results obtained were analysed with regard to the impact of flow velocity on ... hydrodynamic forces opening the codend. These forces, different for different cod end constructions, have great ...
Meeting Document : WG-FSA-93/10 : Auteur(s): W. Moderhak (Poland)
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Determination of a statistically based survey area suitable for hydroacoustic stock assessment of Euphausia superba in the Elephant Island, King George Island, Bransfield Strait area
stock. The two units of sub-area within the site exhibit different patterns of annual distribution, but ... Abstract: The selection of a survey area of sufficient size to acount for the migratory behavior ... of krill and based on evaluating the variance structure of sampling within the area from a time ... the combined total standing stock has a consistent variance to mean biomass relationship that appears ...
Meeting Document : SC-CAMLR-VIII/BG/32 : Auteur(s): Delegation of USA
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Resolution of the Ukraine–Russian seminar ‘Climate, South Ocean Resources, CCAMLR and Antarctic krill’
Abstract: In September, 27-28, 2010, the Ukraine-Russian Seminar "Climate, South Ocean ... Resources, CCAMLR and Antarctic Krill" (CRAK-2010) has been held in Kyiv, Ukraine. The Seminar has been ... organized with the assistance of the State Committee of Fisheries of Ukraine, Kyiv National Taras Shevchenko ... University and under support of the Antarctic Krill Conservation Project (PEW, ASOC). On the seminar the key ...
Meeting Document : CCAMLR-XXIX/BG/35 : Auteur(s): Delegation of Ukraine
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Has climate change promoted genetic fragmentation in the ice-dependent fish Pleuragramma antarcticum?
Abstract: Pleuragramma antarcticum is the only Antarctic notothenioid characterized by a complete ... pelagic life cycle and plays a major trophic role in the coastal Antarctic marine ecosystem. A previous ... genetic study investigated the population structure of this species, but used mitochondrial DNA sequencing ... pools, and population structure. In the present study, we used 16 EST-linked microsatellites to ...
Meeting Document : WG-FSA-13/67 : Auteur(s): C. Agostini, T. Patarnello (Italy), J. Ashford, J. Torres (USA) and L. Zane (Italy)
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Development of a spatially-explicit minimum realistic model for Antarctic toothfish (Dissostichus mawsoni) and its main prey (Macrouridae and Channichthyidae) in the Ross Sea
Abstract: To explore the potential effects of the toothfish fishery on the population dynamics of ... spatially explicit model using a predator-prey suitability model for the Ross Sea Region. We model the age ... predation mortality (M2), in addition to fishing mortality (F) on all three species. The model suggests that ... the predation release caused by the fishery effect on toothfish abundance is greater than the direct ...
Meeting Document : WG-EMM-14/51 : Auteur(s): S. Mormede, M. Pinkerton, A. Dunn, S. Hanchet and S. Parker (New Zealand)