Search results
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Scientific observations in CCAMLR fisheries – past, present and future
Abstract: The Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) has ... the primary competency for managing fishing south of the Antarctic Polar Front. Despite a relatively ... are difficult and expensive to conduct. In addition, the size of the Convention Area, its remoteness ... and prevailing inclement weather have complicated matters. Therefore, in addition to the standard ...
Meeting Document : WG-FSA-04/64 : Author(s): Secretariat
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Results of scientific observation in Antarctic krill fishery in 2010/11: II. analysis of variability of krill size and fish by-catch
as variables of interest based on the scientific observer data for the 2010/2011 fishing season. Both ... observation error. The parameters of the model were estimated by the Markov chain Monte Carlo (MCMC) method in ... WinBUGS with statistical software R. Although the posterior distribution adequately converged for the ... krill length model, some parameters did not converge well in the bycatch fish model. The interaction ...
Meeting Document : WG-EMM-12/67 : Author(s): T. Okuda and M. Kiyota (Japan)
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Results of reading tests of TOP otolith sections and time schedule of reading for Dissostichus otoliths caught in regions of data-poor fisheries
Abstract: The correct age-length keys are essential for the stock assessment of Dissostichus spp ... . by CASAL model. However, the age estimations using the otoliths have been scarcely progressed in ... regions of data-poor fisheries. Therefore the analysis is an urgent task. We have made five reading tests ... using images of thin-sectioned TOP otoliths in December 2012 and May 2013. The coefficient of variation ...
Meeting Document : WG-SAM-13/19 : Author(s): K. Taki and T. Ichii (Japan)
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Proposal for a CCAMLR Science Special Volume
Abstract: CCAMLR Science provides a valuable mechanism for promoting the science undertaken in ... connection with CCAMLR and for raising CCAMLR’s profile within the international scientific community ... . However, in recent years there has been a decrease in the number of papers submitted to CCAMLR Science for ... their publication. Taking into account the review made by the CCAMLR Secretariat, the subsequent ...
Meeting Document : SC-CAMLR-XXXVI/16 : Author(s): Delegations of Argentina and Chile
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A proposal for Krill Fishery Observer Workshop
Abstract: The WG-EMM noted that it’s urgent to develop the sampling protocol which can be used by ... the observer consistently. The WG-EMM 2019 stressed the priorities for data collection, information ... sharing and overall tasking for observers in the krill fishery and recommended the timeliness of holding a ... focused workshop. The delegation of China seek Scientific Committee’s endorsement of the draft terms of ...
Meeting Document : SC-CAMLR-38/22 : Author(s): Delegation of the People’s Republic of China
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Target strengths of krill at 136 and 20 kHz
lengths in the range (45,50) mm the mean single-krill target strengths are in the range (-68,-69) dB at ... 136 kHz. For aggregations with mean lengths in the range (43,47)mm the mean single-krill target ... strengths are in the range (-71,-77) dB at 20 kHz. Trawling-acoustic method. For aggregations with mean ... lengths in the range (47,50) mm the mean target strengths in the range (-71,-75) dB at 20 kHz were ...
Meeting Document : WG-KRILL-91/29 : Author(s): S.M. Kasatkina (USSR)
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Developing layers for a Risk Assessment for Subarea 48.1 using data from at-sea sightings
Abstract: CCAMLR has endorsed the use of the Risk Assessment framework to apportion the krill ... catch limits in order to minimise the risk of the fishery to krill dependent predators. We plan to apply ... the risk assessment framework across Subarea 48.1 at various spatial and temporal scales, in order to ... identify the most appropriate way to spread catch limits for the krill fishery. The risk assessment ...
Meeting Document : WG-EMM-2019/23 : Author(s): V. Warwick-Evans, L. Dalla Rosa, E. Secchi, E. Seyboth, N. Kelly and P.N. Trathan
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ASPECTS OF POPULATION STRUCTURE, DYNAMICS, AND DEMOGRAPHY OF RELEVANCE TO ABUNDANCE ESTIMATION: ADÉLIE PENGUINS
breeding sites during the breeding season. The objective of this paper is to identify and describe the ... aspects of Adélie penguin population structure, dynamics and demography that are relevant to the ... interpretation of counts made at breeding sites and the estimation of overall population abundance derived from ... , it is important to understand the population dynamics of the different components of the population ...
Meeting Document : WG-EMM-PSW-08/09 : Author(s): L. Emmerson and C. Southwell (Australia)
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Review of some assumptions for modelling Patagonian toothfish dynamics at CCAMLR Subarea 48.3
Abstract: During the year 2005 meeting of the WG-FSA two different methods for assessing ... Patagonian toothfish stock in CCAMLR Subarea 48.3 were available to the Working Group: CASAL and ASPM (WG-FSA ... -05/16; WG-FSA-05/73). Although the underlying basic age-structure population dynamics models in both ... cases were similar, there were considerable differences in assumptions and implementations of the two ...
Meeting Document : WG-FSA-SAM-06/13 : Author(s): A. Aubone, P.A. Martínez and O.C. Wöhler (Argentina)
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Antarctic sea ice losses drive gains in benthic carbon drawdown
Abstract: Loss of sea-ice, ice shelves and retreat of coastal glaciers around the Antarctic ... Peninsula in the last few years has exposed new open water, allowing large blooms of phytoplankton to ... flourish in the newly exposed coastal areas. This new productivity has important consequences as the ... phytoplankton die and sink to the sea-bed where the carbon is sequestered for thousands of years. This carbon ...
Meeting Document : SC-CAMLR-XXXIV/BG/34 : Author(s): Delegation of the United Kingdom