Resultados de la búsqueda
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Spatial distribution of Champsocephalus gunnari in Subarea 48.3. Some implications for parameter estimation
(as in the estimation of the variance of the mean density) might result in a gross underestimation of ... Abstract: Results of the analysis of three consecutive cruises to subarea 48.3 are analyzed. A ... significant variance component associated with the formation of clusters of stations was found as well as a ... the variance. The spatial pattern of density across years might be applied to construct a model of ...
Meeting Document : WG-FSA-96/30 : Autor(es): Calcagno, J., Gonzalez, B., Marschoff, E.
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Estimates of bird by-catch by IUU vessels in Subarea 48.3, 1998–2001
by other vessels in 1997. Including the Isabel data and weighting the bootstrap estimates of bird ... catch rate by the number of hooks observed leads to revised estimates of total catch in 1999, 2000 and ... Abstract: Estimates of bird catches by IUU fishing made using the new method presented by Agnew ... and Kirkwood last year (WG-FSA-02/4 & 5) are updated to take account of the comments of the ...
Meeting Document : WG-FSA-03/56 : Autor(es): D.J. Agnew (United Kingdom)
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New possibilities of krill-dependent indicator species monitoring – UAV survey in Subarea 48.1
software. In selected colonies a comparison with the results of measurements taken at the same time from ... identified in 2016. The use of UAV for monitoring of indicator species enabled data acquisition from areas ... performed. The total flight time of the missions was 40 hours and 56 minutes. Flights covered the area of ... resolution GSD (ground sample distance) of 3-6 cm. Obtained images were used for the estimation of population ...
Meeting Document : WG-EMM-17/03 : Autor(es): M. Korczak-Abshire, A. Zmarz, M. Rodzewicz, R. Storvold, M. Kycko, I. Karsznia, A. Kidawa and K.J. Chwedorzewska
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Variations in food composition and feeding intensity of mackerel icefish (Champsocephalus gunnari) at South Georgia
) around Shag Rocks and the mainland of South Georgia was investigated in January/February 1985, January ... of krill and Themisto in the diet items varied considerably between the three seasons, whereas the ... proportion of mysids in the diet remained fairly constant. krill is obviously the prefered diet. In years of ... Abstract: The diet composition and feeding intensity of mackerel icefish (Champsocephalus gunnari ...
Meeting Document : WG-FSA-92/26 : Autor(es): K.-H. Kock (Germany), I. Everson (United Kingdom), S. Wilhelms (Germany), S. Campbell (United Kingdom), J. Szlakowski (Poland), G. Parkes (United Kingdom), Z. Cielniaszek (Poland) and C. Goss (United Kingdom)
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Simulating performance of trend analysis for setting catch limits in exploratory toothfish research plans
Abstract: Catch limits for toothfish in research blocks were set for the 2017/18 season using a ... qualitative analysis of trends in biomass estimated in each research block and a series of simple decision ... developed and tested as a matter of priority for WG-SAM-18. We formalised and codified the rules and ... developed a simulation approach to examine the performance of the trend analysis rules for scenarios with ...
Meeting Document : WG-SAM-18/23 : Autor(es): S. Hoyle, S. Parker, A. Dunn and S. Mormede
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Preliminary assessment of toothfish in Subarea 48.3
were high numbers of the 2001 cohort in commercial catches in 2009 onwards. It is likely that it is ... due to a combination of a strong 2001 cohort and a change in selectivity for the commercial fleet, but ... surveys and the stabilisation of both SSB and CPUE that a long-term yield in the region of 2 000 tonnes ... Abstract: As with the 2009 assessment of Subarea 48.3, there is still uncertainty as to why there ...
Meeting Document : WG-FSA-11/33 Rev. 1 : Autor(es): T. Peatman, R.E. Mitchell, G. Parkes and D.J. Agnew (United Kingdom)
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Sexual dimorphism and sexual segregation in foraging strategies of northern giant petrels Macronectes halli during incubation
dimorphism, in terms of the intersexual food competition hypothesis, on foraging and fasting strategies of ... Abstract: Giant petrels (Macronectes spp) are the most sexually dimorphic of all seabirds. We ... used satellite-tracking and mass change during incubation to investigate the influence of sexual size ... , duration of foraging trips) was greater for females than for males. In contrast, foraging efficiency ...
Meeting Document : WG-FSA-99/38 : Autor(es): J. González-Solís, J.P. Croxall and A.G. Wood (United Kingdom)
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Analysis of trends in Japanese krill fishery CPUE data, and its possible use as a krill abundance index
critical level of krill availability which is just enough to maintain the best factory performance. In this ... analysis the status of fishing in Subareas 48.1 and 48.2 was not clear. A linear correlation was observed ... Paper Title: Analysis of trends in Japanese krill fishery CPUE data, and its possible use as a ... Japanese krill fishery for the 1980/81 to 2003/04 fishing seasons were analysed. For a number of ... CPUE indices. The inter annual trends in actual mean values showed different patterns from those of ... critical level of krill availability which is just enough to maintain the best factory performance. In ... this analysis the status of fi shing in Subareas 48.1 and 48.2 was not clear. A linear correlation was ... studies pointed out the importance of including a measure of searching time in the abundance index in ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 1–28 : Autor(es): Kawaguchi, S., S. Candy, S. Nicol, K. Taki and M. Naganobu
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Differences in distribution and population structure of krill (Euphausia superba) between penguin and fur seal foraging areas near Seal Island
the surface throughout the day. With regard to body size and maturity of krill in the inshore foraging ... dominant with occasional occurrences of juveniles (modal length 21 mm). In contrast, in the offshore ... Paper Title: Differences in distribution and population structure of krill (Euphausia superba ... in inshore regions where krill frequently occurred but higher density areas of krill (~250 g/m 2 ... close to the surface throughout the day. With regard to body size and maturity of krill in the inshore ... dominant with occasional occurrences of juveniles (modal length 21 mm). In contrast, in the offshore ... in the foraging areas of penguins and fur seals. The reasons why fur seals chose offshore foraging ... active sites in the Antarctic Peninsula Integrated Study Region of CEMP (CCAMLR Ecosystem Monitoring ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 273–285 : Autor(es): Ichii, T., H. Ishii, J.L. Bengtson, P. Boveng, J.K. Jansen and M. Naganobu
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On dispersion of different pelagic organisms, forming Antarctic backscattering in South Sandwich subarea during January–February 2000
Abstract: In the paper these have been discussed the results of acoustic estimation of ... groups of pelagic organisms. One can reveal, basing on the results of surveying, the influence of water ... ground locations occupied by the Weddell Sea waters and Frontal Zone of Weddell Gyral waters; myctophid ... fishes prevail in northern proving ground within the Antarctic Curcumpolar Current waters; zooplankton is ...
Meeting Document : WG-EMM-01/61 : Autor(es): S.M. Kasatkina and A.P. Malyshko (Russia)