Resultados de la búsqueda
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A generalized discriminant for sexing fulmarine petrels from external measurements
birds to predict the sex of unknown individuals in field studies. Geographic variation in size and shape ... , Daption capense; and Snow Petrel, Pagodroma nivea) assigned 81 to 98% of birds in the samples to the ... single discriminant. Adequate performance of this generalized discriminant in samples of different ... species shows its validity for use in other populations of any of these species. The generalized function ...
Meeting Document : WG-CEMP-94/24 : Autor(es): J.A. van Franeker and C.J.F. ter Braak (The Netherlands)
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Krill caught by predators and nets: differences between species and techniques
during February 1986 at South Georgia were compared to krill from scientific nets fished in the area at ... differences from krill taken by other predators and by nets. There were significant differences in the ... maturity/sex stage composition between nets and predators; in particular all predator species showed a ... consistent sex bias towards female krill. Similarities in the krill taken by macaroni (offshore feeding) and ...
Meeting Document : WG-EMM-96/09 : Autor(es): Hill, H.J., Reid, K., Trathan, P.N., Croxall, J.P.
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Distribution and population structure of Dissostichus eleginoides and D. mawsoni on BANZARE Bank (CCAMLR Division 58.4.3b), Indian Ocean, Antarctic
fishing season. D. eleginoides was mainly caught in the shallower bank <1000 m, while D. mawsoni was ... mainly caught in the deeper slope >1500 m. The separation of the two species by depths may be related ... in D. eleginoids, while the size structure was very similar among fishing seasons and showed the ... unimodal distribution in D. mawsoni. D. eleginoides showed resting stage in sexual maturity, while D ...
Meeting Document : WG-FSA-10/47 : Autor(es): K. Taki, M. Kiyota, T. Ichii and T. Iwami (Japan)
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Distribution and population structure of Dissostichus eleginoides and D. mawsoni on BANZARE Bank (CCAMLR Division 58.4.3b), Indian Ocean, Antarctic
fishing season. D. eleginoides was mainly caught in the shallower bank <1000 m, while D. mawsoni was ... mainly caught in the deeper slope >1500 m. The separation of the two species by depths may be related ... in D. eleginoids, while the size structure was very similar among fishing seasons and showed the ... unimodal distribution in D. mawsoni. D. eleginoides showed resting stage in sexual maturity, while D ...
Meeting Document : WG-SAM-10/16 : Autor(es): K. Taki, M. Kiyota, T. Ichii and T. Iwami (Japan)
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Acoustic and catch data collected by the fleet – relevance for feedback management
Abstract: The Norwegian fishing vessels involved in krill fisheries are also used to carry out ... logging also during periods of commercial fishing. In this paper we give an overview of the properties of ... these data and demonstrate potential applications for example to extract information on changes in ... distribution over time in a single season. Vertical distributions inside and outside the fishing area change ...
Meeting Document : WG-EMM-15/13 : Autor(es): O.R. Godø, T. Klevjer and G. Skaret (Norway)
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Results of the first winter longline survey to the northern Ross Sea region to investigate toothfish reproductive life history
Abstract: The first winter longline survey of Antarctic toothfish in the northern Ross Sea region ... was successfully completed during June and July 2016. A total of 55 longlines sets were completed in ... . Spawning and spent Antarctic toothfish were captured late in the survey on undersea features to the ... northwest of stratum 1. Gonad staging and gonadosomatic indices suggest that males in spawning condition may ...
Meeting Document : WG-FSA-16/37 : Autor(es): D. Stevens, D. Di Blasi and S. Parker
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Proposals on standardization of toothfish resource research
discussed in the context of discussion at the Scientific Committee and the CCAMLR Commission in 2018 ... regarding the longline survey methodology in Division 58.4.1. It is shown that the methodology of modern ... mandatory for all ships participating in the survey. At the same time, methodological aspects of the multi ... -year international research program implemented in Subdivision 58.4.1., such as the lack of ...
Meeting Document : WG-SAM-2019/34 : Autor(es): S. Kasatkina
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An initial analysis of the characteristics of Antarctic krill taken by the commercial fishery and Antarctic fur seals during the winters of 2002 and 2003 at South Georgia
the length-frequency distribution and frequency of occurrence of krill in the diet of Antarctic fur ... seals. There were significant differences in the mean size of krill taken by vessels/measured by ... overlap in the size composition of krill in the fishery and the diet of Antarctic fur seals. During the ... period of the winter when there was a reduction in the frequency of occurrence of krill in the diet of ...
Meeting Document : WG-EMM-04/62 : Autor(es): K. Reid, D.J. Agnew, N.L. Warren and E. Owen (United Kingdom)
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Beach debris survey – Main Bay, Bird Island, South Georgia 1996/97
revealed a total of 289 items, 60 % less than in the two previous years. Of the total number of items, 62 ... collection exceeded the winter. Nylon line, identical to that used in longline gear, accounted for 57 % of ... packaging bands being in force since 1994/95 their occurrence in debris surveys indicates their continued ... use. The reduction in man-made debris compared to the two previous years may reflect a reduction in ...
Meeting Document : CCAMLR-XVII/BG/7 : Autor(es): Delegation of the United Kingdom
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ANNUAL REPORT FROM SCAR TO CCAMLR
Biodiversity in the Antarctic (EBA) programme, SCAR-MarBIN, the Southern Ocean Continuous Plankton Recorder ... gather information on marine biodiversity in the Antarctic, and the CPR Survey continues to grow with ... was presented to the ATCM in Baltimore in April. The 10th SCAR International Biology Symposium was ... held in Sapporo from 26 to 31 July 2009, with the theme "Antarctic Biology in the 21st Century ...
Meeting Document : CCAMLR-XXVIII/BG/34 : Autor(es): Submitted by SCAR