Search results
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Distribution of mackerel icefish (Champsocephalus gunnari) (Channichthyidae) around South Georgia at various stages of its life cycle
South Georgia at various stages of its life cycle Abstract / Description: The distribution of mackerel ... icefish (Champsocephalus gunnari) around South Georgia (FAO Statistical Subarea 48.3) at various stages of ... ) were mainly observed near the bottom and at depths of up to 75 m from the bottom. Young fish undertake ... fish were found to be distributed throughout the water column at all times of the day, but they also ... ) AROUND SOUTH GEORGIA AT VARIOUS STAGES OF ITS LIFE CYCLE Zh.A. Frolkina AtlantNIRO 5 Dmitry Donskoy ... (<6 cm) were mainly observed near the bottom and at depths of up to 75 m from the bottom. Young fi ... distribution of the species is limited mostly to records of depths at which fi sh have been observed ... . Variability of the distribution of C. gunnari by depth stratum and season at various stages of its life ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 49–69 : Author(s): Frolkina, Zh.A
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The foraging range of Adélie penguins at Béchervaise Island, Mac. Robertson Land, Antarctica, and its overlap with the krill fishery
determined by satellite tracking using the ARGOS system. Birds were tracked over four foraging trips (two ... females and four males) during the incubation period (November to December 1991) and 17 trips (four ... trips to the continental shelf break (1 000 m isobath) approximately 110 km distant at its closest point ... the ARGOS system. Birds were tracked over four foraging trips (two females and four males) during ... by satellite tracking using the ARGOS system. Birds were tracked over four foraging trips (two females ... and four males) during the incubation period (November to December 1991) and 17 trips (four females ... and two males) throughout January 1992 when birds were feeding chicks. Most birds made foraging trips ... trips of between two and three weeks. Later in January/February both parents are required to forage ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 337–344 : Author(s): Kerry, K.R., J.R. Clarke and G.D. Else
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Intra-annual variability in the density of Antarctic krill (Euphausia superba) at South Georgia, 2002–2005: within-year variation provides a new framework for interpreting previous ‘annual’ estimates of krill density
fl uctu- ate substantially within seasons (McClatchie et al., 1994; Siegel, 1988). The possible ... Paper Title: Intra-annual variability in the density of Antarctic krill (Euphausia superba) at ... ‘annual’ estimates of krill density Abstract / Description: Upward-looking acoustic Doppler current ... of South Georgia between 14 October 2002 and 29 December 2005 to measure density of Antarctic krill ... explained 64% of the observed week-to-week variation. Estimates of krill density from moored instruments ...
Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 27–41 : Author(s): Saunders, R.A., A.S. Brierley, J.L. Watkins, K. Reid, E.J. Murphy, P. Enderlein and D.G. Bone
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Maximum entropy reconstructions of krill distribution and estimates of krill density from acoustic surveys at South Georgia, 1996–2000
has an infl uence mathematically on the variance associ- ated with the MaxEnt recon struction ... . Krill densities had previously been determined at approximately 0.5 km intervals along each of the ten ... Paper Title: Maximum entropy reconstructions of krill distribution and estimates of krill density ... from acoustic surveys at South Georgia, 1996–2000 Abstract / Description: This paper presents Maximum ... Entropy (MaxEnt) reconstructions of krill distribution and estimates of mean krill density within two ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 91–100 : Author(s): Wafy, M.H., A.S. Brierley, S.F. Gull and J.L. Watkins
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Investigation of bias in the mark–recapture estimate of toothfish population size at South Georgia
Paper Title: Investigation of bias in the mark–recapture estimate of toothfish population size at ... releases and recapture effort at South Georgia is likely to lead to an underestimate of the true population ... South Georgia Abstract / Description: This paper investigates the influence of mixing of fish, and the ... uneven distribution of tag placements and recapture effort, on bias in the Petersen estimator of ... InvestIgatIon of bIas In the mark–recapture estImate of toothfIsh populatIon sIze at south georgIa D.J. Agnew ... Subarea 48.3, it is concluded that the particular distribution of tag releases and recapture effort at ... rates of tagged toothfish at South Georgia are almost certainly relatively low because, in common with ... depending on the trend of the 1 000 m contour at that position around South Georgia or Shag Rocks. The ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 47–63 : Author(s): Agnew, D.J., G.P. Kirkwood, J. Pearce and J. Clark
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Analysis of the diet of Champsocephalus gunnari at South Georgia in late summer from 1994 to 1997, Dr Eduardo L. Holmberg surveys
Paper Title: Analysis of the diet of Champsocephalus gunnari at South Georgia in late summer from ... 1994 to 1997, Dr Eduardo L. Holmberg surveys Abstract / Description: The diet composition of the ... was analysed using frequency of occurrence (F%) and dietary coefficient (Q%) methods. Krill (Euphausia ... Georgia and Shag Rocks in the period investigated, except in 1994, when the order of importance of these ... DIET OF CHMPSOCEPHALUS GUNNARZ AT SOUTH GEORGIA IN LATE SUMMER FROM 1994 TO 1997, DR E D U R D O L ... of the 1980s and at lower The mackerel icefish (Charnpsocephalus gunnaui) levels up t o t he ... ., 1988; Kock et al., 1994a). Together with other Diet of C. gunnari at South Georgia Table 1 ... a sample size of 25 ensures CVs of at least 10%. We established a maximum n of 50, which yields ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 103–123 : Author(s): Barrera-Oro, E., R. Casaux and E. Marschoff
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Differences in distribution and population structure of krill (Euphausia superba) between penguin and fur seal foraging areas near Seal Island
1 to 2 n miles) until a fur seal or penguin departed to sea on a feeding trip; at that time, the ship followed ... trip. Location of the ship was monitored every 15 minutes by radar and a satellite navigation system ... ) (six trips), one macaroni penguin (Eudyptes chrysolophus) and one female fur seal (Arctocephalus ... gazella). Most penguins were tracked for the majority of one entire feeding trip. The trip of the female ... Paper Title: Differences in distribution and population structure of krill (Euphausia superba ... studies of krill-eating predators (penguins and female fur seals) near Seal Island were conducted to ... in inshore regions where krill frequently occurred but higher density areas of krill (~250 g/m 2 ... occurred only occasionally but in large aggregations (surface length about 2 to 3 km) of higher densities ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 273–285 : Author(s): Ichii, T., H. Ishii, J.L. Bengtson, P. Boveng, J.K. Jansen and M. Naganobu
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Variations in condition indices of mackerel icefish at South Georgia from 1972 to 1997
penguin; trip = foraging trip duration; surv = pup survival; meal = meal size and S = breeding success ... . Year ct FUSE CEPE MAPE Nov Dec Jan Feb Mar Trip Surv Meal S Meal S Comparison of Condition Index ... to the diet of each of the three species. These are fur seal foraging trip duration and pup survival, gentoo ... . The foraging trip and diet parameters integrate over these same scales but in periods of two to five days ... Paper Title: Variations in condition indices of mackerel icefish at South Georgia from 1972 to ... predominantly on krill. An index of condition which uses the ratio of the measured total mass to the estimated ... mass is shown to provide a good indicator of local krill density. The index is likely to be little ... responds rapidly to changes in krill density and therefore can provide indications of short-term variations ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 119–132 : Author(s): Everson, I. and K.-H. Kock
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Age, growth and size at sexual maturity of Macrourus carinatus caught as by-catch in Australian sub-Antarctic trawl fisheries
obtained during two commercial trawl fi shing trips to Macquarie Island in January 1999 and June 2000 ... 1993, and a commercial trawl fi shing trip to Heard and McDonald Islands in September/October 2000 ... shing trip to Heard and McDonald Islands in September/October 2000. The fi sh were measured for total ... Paper Title: Age, growth and size at sexual maturity of Macrourus carinatus caught as by-catch in ... Australian sub-Antarctic trawl fisheries Abstract / Description: Estimates of age and growth were obtained ... McDonald Islands (Division 58.5.2) in 1992 and 1993. The range of estimated ages was 4 to 25 years. There ... growth parameters for both sexes combined were: L ∞ = 690 mm, K = 0.069 and t 0 =-2.4. The size at sexual ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 139–151 : Author(s): van Wijk, E.M., R. Williams and A.J. Constable
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The biology, ecology and development of fishery management advice for the anomuran crabs at South Georgia (CCAMLR Subarea 48.3)
various assumptions of recruitment. Estimates of appropri- ate short-term catch limits were made ... limits In the 1991/92 season data from an initial 22-day trip of the US vessel FV Pro Surveyor ... during the initial 22-day trip had smaller carapace widths than 90 mm. Minimum carapace width limits ... ) and the subsequent recommendations of WG-FSA and the Scientific Committee (SC-CAMLR, 1992). WG-FSA requested ... available information on the biology and ecology of the lithodids at South Georgia and provides an overview ... gaps in our knowledge of the biology, ecology and demography of the lithodid species at South Georgia ... Paper Title: The biology, ecology and development of fishery management advice for the anomuran ... crabs at South Georgia (CCAMLR Subarea 48.3) Abstract / Description: This review summarises the ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 1–15 : Author(s): Belchier, M., T. Peatman and J. Brown