Результаты поиска
-
Surface water circulation in krill fishing areas near the South Shetland Islands
with a drogue attached at a depth of 30 m to assess flow patterns at the depth range where krill tended ... Orkneys for 20 days before drifting to South Georgia. Buoy 4, deployed in the shelf region, moved east ... currents which had properties of retention. In addition to positions of catches for the past 13 years ... at a depth of 30 m to assess flow patterns at the depth range where krill tended to be most abundant ... une ancre de cape situee a 30 m de profondeur, pour kvaluer les mouvements du courant dans ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 125–136 : Автор(ы): Ichii, T. and M. Naganobu
-
Statistical power to detect changes in growth rates of Antarctic fur seal pups
Abstract / Description: Numerical simulations were used to investigate the power of methods for detecting ... changes (between years) in pup growth rates, the loss of power associated with obtaining weight samples on ... for each year and as weighted averages of both years. Growth Rate Standard Error (kg/d) of Growth ... Numerical simulations were used to investigate the power of methods for detecting changes (between years ... ) from both years were formed for use in a power analysis. Monte Carlo simulations were used to ... ------- ------- Females ------- mean mean Date n weight (kg) s.d. n weight (kg) s.d. 1988: 2 Jan 30 9.91 1.60 20 8.78 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 399–409 : Автор(ы): Boveng, P., J.L. Bengtson and M.E. Goebel
-
Population genetic structure of Patagonian toothfish in the West Indian Ocean sector of the Southern Ocean
fi sh had been at liberty for 0.7 to 3.8 years, demonstrating that under some circumstances D ... ARLEQUIN ver. 2.000. FST (an inbreeding coeffi cient) is an estimate of the pro- portion of genetic ... differentia- tion). The overall mtDNA results did not provide any evidence for an association between geo ... increased in economic value since the start of commercial exploitation, approximately 17 years ago, within ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 21–32 : Автор(ы): Appleyard, S.A., R. Williams and R.D. Ward
-
Analyses of acoustic line-transect data from the waters around South Georgia: estimation of krill (Euphausia superba Dana) – biomass
155 786 km 2 was estimated to be 1.8225 x 10 6 tonnes (Coefficient of Variation = 9.5%). This gives an ... . An estimate of the mean bottom depth was available for each section. The CTD profiles collected at ... was obtained for an area approximately 1.63 x 105 km2, which compares with the 1.56 x 105 km2 used in ... estimates obtained for the region in other years. The above analyses have highlighted that the various ... may be available in the region in any year. For 6.7 x 106 tonnes to be available in a year and ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 225–243 : Автор(ы): Murphy, E., I. Everson and A. Murray
-
Survey design to estimate krill abundance during FIBEX
methodology for assessing the abundance of krill. The survey design used in the southwest Atlantic study area ... of the FIBEX is described in this paper. Sampling involved the use of echo sounders for estimating ... which are discussed. The analytical formulae for the analyses are also presented File: 05-Everson-et ... . Assuming that an unbiassed estimate of mean krill density can be obtained for each sampled transect, the ... design is capable of providing an unbiassed estimate of density for each stratum. 2. Stratification ... (First International BIOMASS Experiment), 1981 was to study the methodology for assessing the abundance ... this papers. Sampling involved the use of echosounders for estimating krill abundance as well as ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 253–263 : Автор(ы): Everson, I., I. Hampton and G.M. Jolly
-
Areal and seasonal extent of sea-ice cover off the northwestern side of the Antarctic Peninsula: 1979 to 1996
Antarctic Peninsula: 1979 to 1996 Abstract / Description: Analysis of seasonal sea-ice cover of an area ... four periods of extensive ice cover during the last 18 years. Variability in seasonal timing, areal ... extent, seasonal duration and persistence of sea-ice over multiple years is apparent and is consistent ... with features described by Stammerjohn and Smith (1996) for ice cover in the Bellingshausen Sea ... years is apparent and is consistent with features described by Stammerjohn and Smith (1996) for ice ... use of the same data sources to derive an index of ice cover for a larger area, encompassing the ... were subsampled for an area of 40 X 50 pixels (1.25 X 10Qm2) centred on the northwestern side of the ... Ocean: an analysis for the west Antarctic Peninsula region. AMS Sixth Conference on Climate Variations ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 65–73 : Автор(ы): Hewitt, R
-
Sources of variance in studies of krill population genetics
these species would affect the design of management strategies for their conservation. A recent ... taken within one region. This has important implications for the design of future studies of krill ... 94ºC for 2 min to denature template DNA, followed by thermal cycling at 94ºC 20 s, 43ºC 1 min and ... 98 6 4 al lo zy m e lo ci 20 2, 1 90 , 1 97 , 1 96 , 1 89 , 1 98 N o d if fe ... for 20 min and the gel transfer- red onto a UV transilluminator. The gel was photographed through a ... number of trawl hauls necessary to get an unbiased estimate of these population parameters for krill ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 107–116 : Автор(ы): Jarman, S.N. and S. Nicol
-
The CCAMLR-2000 Krill Synoptic Survey: a description of the rationale and design
boundaries is described. The methods used for selecting the location of each survey transect are explained ... and the planned cruise tracks for each of the four vessels participating in the survey are shown ... . Details are also described for adaptively modifying the survey during its execution. This includes ... will take several years and will result in a significant increase in the knowledge of krill length ... adopted. Such an approach has been widely used in the past (for instance FIBEX - BIOMASS, 1980) and was ... gave the necessary condition for the validity of the design- based variance estimators. An ... sampling probability in that area. To overcome this, an n priori selection of sampling units for ... - ments: a review and an acoustic application. ICES J. Mar. Sci., 50: 285-298. SC-CAMLR. 1991. Report ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 1–23 : Автор(ы): Trathan, P.N., J.L. Watkins, A.W.A. Murray, A.S. Brierley, I. Everson, C. Goss, J. Priddle, K. Reid, P. Ward, R. Hewitt, D. Demer, M. Naganobu, S. Kawaguchi, V. Sushin, S.M. Kasatkina, S. Hedley, S. Kim and T. Pauly
-
Krill (Euphausia superba) distribution in relation to water movement and phytoplankton distribution off the northern South Shetland Islands
Elephant Island. The main objective of the survey was to investigate the mechanisms responsible for the ... deployed at a level of 30 m from the surface because at this level krill concentrations are most frequently ... food availability factors may be responsible for krill concentration. On a traditional fishing ground ... regarded as the lower level for this time of the season. From mid-February and onwards it was reported that ... this region with the yearly catches of 10 000 to 70 000 tonnes for the past eight years. This region ... levels (0, 10, 20, 30, 40, 50, 75, 100, 125, 150 and 200 m). Chl-a concentration was determined by ... , twelve locations per day were obtained for each buoy with an accuracy higher than several hundred metres ... objective of the survey was to investigate the mechanisms responsible for the concentration of lain and to ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 123–140 : Автор(ы): Ichii, T., H. Ishii and M. Naganobu
-
Mitigation of seabird captures during hauling in CCAMLR longline fisheries
/ Description: In recent years there has been an increased focus on reducing seabird captures that occur during ... MRAG Ltd 18 Queen Street, London W1J 5PN United Kingdom Abstract In recent years there has been an ... , Australia B. Sullivan BirdLife International Global Seabird Programme Royal Society for the Protection ... aboard they may sustain injuries that compromise their long-term survival. For example, injuries can ... haul should be encouraged. Hence, the need for the development of mitigation measures reducing ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 155–162 : Автор(ы): Reid, E., B. Sullivan and J. Clark
Страницы
- « первая
- ‹ предыдущая
- …
- 34
- 35
- 36
- 37
- 38
- 39
- 40
- 41
- 42
- следующая ›
- последняя »