Search results
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Marine mammals and demersal longlines fishery interactions in Crozet and Kerguelen Exclusive Economic Zones: an assessment of the depredation level
(Arctocephalus sp.) interactions with longlines fishing operations were reported by observers onboard of fishing ... and 2005. In Crozet waters, 71% of the 1308 longlines presented marine mammals interactions with ... % of the 6262 longlines monitored in the Kerguelen waters. Interactions occurred over the whole fishing ... . Depredation effect was assessed by comparing CPUEs of the longlines, in absence/presence of any marine mammals ...
Meeting Document : WG-FSA-06/63 : Author(s): C. Roche, N. Gasco, G. Duhamel and C. Guinet (France)
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Modelling growth of Antarctic krill: growth trends with sex, length, season, and region
Abstract: Growth trends of Antarctic krill with sex, length, season and region using over 10 ... years accumulation of instantaneous growth rate (IGR) measurements were modelled using a Linear Mixed ... Model (LMM). A model of inter-moult period (IMP) as a function of temperature, required to convert IGR ... this model was used to predict seasonal IMP using a model of the average sea-surface temperature ...
Meeting Document : WG-EMM-05/29 : Author(s): S. Kawaguchi, S. Candy, R. King (Australia), M. Naganobu (Japan) and S. Nicol (Australia)
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RELEVANT ISSUES IN REGARDS TO THE MANAGEMENT OF ANTARCTIC KRILL FISHERIES IN AREA 48
magnitude of the scientific uncertainties and data gaps affecting the subdivision of precautionary catch ... the data obtaining process financially. The discussion of that issue at 2009 WG-EMM meeting will be ... useful in a course of the consideration a decision on a Stage 1 allocation. In addition, this meeting ... monitoring plan for krill in Area 48. Due to the high level of risk associated with maintaining the current ...
Meeting Document : WG-EMM-09/31 : Author(s): L. Pshenichnov and G. Milinevsky (Ukraine)
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Dynamics of Antarctic penguin populations in relation to inter-annual variability in sea-ice distribution
Abstract: To investigate the role of sea ice cover on penguin populations we used principal ... component analysis to compare population variables of Adélie (Pygoscelis adeliae) and chinstrap (Pygoscelis ... population size remained stable, whereas that of chinstrap penguins decreased slightly. For neither species ... apparent inverse density-dependent relationship between the number of Adélie breeding pairs and the number ...
Meeting Document : WG-EMM-96/10 : Author(s): Murphy, E.J., Croxall, J.P., Trathan, P.N.
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Orientation of Antarctic krill in an aquarium
slightly less than that when animals were hovering, 49.7° (SD=7.5°, N=50). Such an acute angle of elevation ... . Although mature females with marked swelling of the cephalothorax were not included in the experiment, the ... center of mass was found to be situated more to the anterior than in males and immature females. The ... hovering orientation, which is close to average body orientation, of mature males and mature females was ...
Meeting Document : WG-KRILL-93/24 : Author(s): Y. Endo (Japan)
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Semi-empirical acoustic estimates of krill biomass derived from simulated commercial fishery data based on single-frequency acoustics
fishing seasons. From these data we develop semi-empirical indices of acoustic biomass in a Generalized ... Linear Modeling framework. We correlate these estimates of biomass with acoustic estimates derived from ... Elephant Island and West Shelf Areas of the US AMLR survey grid. Cross-validation of acoustic estimates ... frequency of animals is skewed towards larger animals. We show that it is possible to develop semi-empirical ...
Meeting Document : SG-ASAM-12/04 : Author(s): A.M. Cossio, G.W. Watters, C.S. Reiss, J. Hinke and D. Kinzey (USA)
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Deployment and recovery of an archival tag on an Antarctic toothfish in the Ross Sea
migration patterns in fishes. Understanding these movement patterns is one of the key information needs for ... the assessment and management of Antarctic toothfish. We deployed 4 pop-off satellite archival tags on ... large toothfish on the Ross Sea slope in January 2013 and report on the first recovery of an Antarctic ... 24, 2013), providing 335 days of data archived at 10 min intervals. Summaries of raw data show strong ...
Meeting Document : WG-FSA-14/64 : Author(s): S.J. Parker, D.N. Webber and R. Arnold (New Zealand)
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Semi-empirical acoustic estimates of krill biomass derived from simulated commercial fishery data based on single-frequency acoustics
fishing seasons. From these data we develop semi-empirical indices of acoustic biomass in a Generalized ... Linear Modeling framework. We correlate these estimates of biomass with acoustic estimates derived from ... Elephant Island and West Shelf Areas of the US AMLR survey grid. Cross-validation of acoustic estimates ... frequency of animals is skewed towards larger animals. We show that it is possible to develop semi-empirical ...
Meeting Document : SG-ASAM-15/03 : Author(s): A.M. Cossio, G.W. Watters, C.S. Reiss, J. Hinke and D. Kinzey (USA)
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Comparison of NASC values calculated by swarm-based and grid-based acoustic data processing methods for Antarctic krill density estimation
Abstract: The one nautical mile integrated Nautical Area Scattering Coefficient (NASC) values of ... -based acoustic data processing methods. All parameter settings were consistent with the reports of SG ... -ASAM-2017 except that the dB difference window of Sv 120 kHz-Sv 38kHz is set 0 to 20 dB. And the two ... groups of results were compared by correlation, linear regression analysis and nonparametric significant ...
Meeting Document : SG-ASAM-18/04 Rev. 1 : Author(s): X. Yu, X. Wang and X. Zhao
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Report on the activities of the Scientific Committee on Antarctic Research (SCAR) 2005/06SCAR Observer to CCAMLR
directly to CCAMLR or are of potential interest to CCAMLR. This includes a report on the SCAR XXIX ... and Biodiversity in the Antarctic (EBA) and the Census of Antarctic Marine Life (CAML) projects. CAML ... for CCAMLR. The activities of the Expert Groupss of Birds and Seals are summarised, as well as new ... on marine acoustic studies at the University of Cadiz, Spain in January 2006. A summary is provided ...
Meeting Document : CCAMLR-XXV/BG/22 : Author(s): SCAR Observer to CCAMLR(G. Hosie, Australia)