Résultats de la recherche
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Swimming speed and allocation of time during the dive cycle of Antarctic fur seals
descent and ascent phases of dives with a reduction in speed near the bottom of the dive, when the seals ... in terms of reduced foraging time and may explain why mean dive depths for individuals were within ... Abstract: During sustained bouts of diving, predators like fur seals may adjust the time they ... between dives. To examine this, swimming speeds and the time allocated to different parts of the dive ...
Meeting Document : WG-EMM-95/25 : Auteur(s): Bevan, R.M., Boyd, I.L., Reid, K.
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Feasibility of lead-radium dating the otoliths of blackfin icefish (Chaenocephalus aceratus) and ocellated icefish (Chionodraco rastrospinosus)
determining the parameters of future applications that would lead to a validation of age. In the current study ... arbitrary target core weight of 0.01 g, near the low end of the range used in this study. It is recommended ... otoliths from these fishes were small and the number of otoliths available low, a whole otolith application ... was necessary as a first look at lead-radium levels. The application was successful as a first step in ...
Meeting Document : WG-FSA-10/17 : Auteur(s): A.H. Andrews, M. La Mesa and J. Ashford (USA)
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Analyses of acoustic line-transect data from the waters around South Georgia: estimation of krill (Euphausia superba Dana) – biomass
of zooplankton stocks in the waters around South Georgia was carried out during November and December ... 1981. The data have been analysed using various definitions of strata. The total biomass in the area of ... estimate of mean density throughout the region of 11.7 tonnes km-2. Although the estimate of the mean is ... Paper Title: Analyses of acoustic line-transect data from the waters around South Georgia ... taken during the survey period is shown in Figure 2. Most of the krill were small, with a mean length ... to estimate the biomass of krill in this region. The mean weight of the sampled krill was 0.18 g ... an estimate of the total biomass in the region. This was 2.13 x 106 tonnes giving a mean krill ... based on the six regional strata shown in Figure 5. Source of Degrees of Sum of Squares Mean Square ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 225–243 : Auteur(s): Murphy, E., I. Everson and A. Murray
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Preliminary analyses of data collected during experimental phases of the 1994/95 and 1995/96 Antarctic crab fishing seasons
, negative slopes. The insignificant regressions were probably a result of inter-haul variability in CPUE and ... depletion estimators for use in stock assessment, but the WG-FSA may wish to re-evaluate the design of Phase ... Abstract: Data collected from the FN American Champion during Phases 1 and 2 of the experimental ... generalized additive models show that the density of fishable P. spinosissima is highest off the northern ...
Meeting Document : WG-FSA-96/34 : Auteur(s): Watters, G.
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Calculation of indices of sea-ice concentration using digital images from the National Snow and Ice Data Centre
, made up of 312x332 pixels, each having a dimension of 25x25km, for every day in the year. Primary data ... percentage ice cover in subareas, are entered into the CCAMLR database. Indices of ice cover are calculated ... distributed by the National Snow and Ice Data Centre, Colorado, USA. Data consist of an image of the Antarctic ... of the distance of sea ice from CEMP sites, the northerly position of the sea ice edge, and the ...
Meeting Document : WG-EMM-95/11 : Auteur(s): Agnew, D.J.
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CPUE, net towing depth and body length of krill during the winter operation of Japanese krill fishery around South Georgia
were calculated. The range of CPUE values in 1991 season (poor year of krill) was comparable to the ... from net towing depth. Net tow depth data implied that overall krill distribution in the the winter ... season might be deeper than the summer season. Interannual variability of vertical distribution was also ... suggeted. Length frequency distribution implied the evidence of strong krill influx from the Antarctic ...
Meeting Document : WG-EMM-96/51 : Auteur(s): Kawaguchi, S., Ichii, T., Naganobu, M.
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Genetic variations and population structure of krill from the Prydz Bay region of Antarctic waters
results of this study agree closely with genetic data from other studies on krill in the Atlantic sector ... Paper Title: Genetic variations and population structure of krill from the Prydz Bay region of ... consistent with the hypothesis that all samples were derived from a single breeding population of krill. The ... of the Southern Ocean, suggesting that krill stocks over at least 6000 kilometres of Antarctic waters ... of krill. The results of this study agree closely with genetic data from other studies on krill in ... POPULATION STRUCTURE OF KRILL FROM THE PRYDZ BAY REGION OF ANTARCTIC WATERS C.M. MacDonald, R. Williams ... the Atlantic sector of the Southern Ocean, suggesting that krill stocks over at least 6000 ... kilometres of Antarctic waters are derived from a single interbreeding population. Note The full text of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 271-273 : Auteur(s): MacDonald, C.M., R. Williams and M. Adams
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Final report of scientific observation of commercial krill harvest aboard the Japanese stern trawler Niitaka Maru, 13 December 2000–26 January 2001
measurements of krill, product types are described in the report. The trawler made an anti-clockwise trip ... Scientific Observers Manual. Summary of the fishing efforts, processing, fish by-catches, biological ... could not catch in the other locations. The patches seemed to be relatively dispersed compared to the ... scientific observation of commercial krill harvest aboard the Japanese stern trawler Niitaka Maru, 13 ...
Meeting Document : WG-EMM-01/38 : Auteur(s): T. Hayashi, S. Kawaguchi and M. Naganobu (Japan)
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Some considerations for the further development of statistical summaries of CEMP indices
-EMM for identifying anomalies in CEMP parameters is examined by means of simulation tests. The power ... values have appeared in the data. An alternative procedure, using baseline mean and variance estimates ... Abstract: A potential method is presented for combining data collected as part of the CCAMLR ... ecosystem monitoring programme (CEMP) into a single index for each of the predator, prey and environment ...
Meeting Document : WG-EMM-Stats-97/07 : Auteur(s): de la Mare, W.K.
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Progress report of the CEMP Special Fund project to develop an image processing software tool for analysis of camera network monitoring data
Abstract: We provide a brief update on the progress of our CEMP Special Fund project ‘Developing ... an image processing software tool for analysis of camera network monitoring data’. The project was ... initiated with support from the CEMP Fund in 2015/16. A software programmer has been engaged and is ... post-processing code according to specifications developed in consultation with the CCAMLR camera user ...
Meeting Document : WG-EMM-17/10 : Auteur(s): C. Southwell, L. Emmerson, K. Newbery, J. Hinke, G. Watters, M. Santos, G. Milinevsky, M. Korczak-Abshire, N. Ratcliffe and P. Trathan