Search results
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Target strengths of Antarctic krill (Euphausia superba)
on roughly one out of two days, and hurricane force about once a fortnight. Depending on the wind direction ... attached to a gantry positioned over one of two identical 4 x 4 m square moon-pools on the raft ... and lowering by a winch attached to a gantry positioned over one of two identical 4 x 4 m square moon-pools ... moins elevees que I'on supposait jusqu'a present. Pe3lOMe Cpe~H~~ CH~a o6paTHoro pacceHBaro~ero ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 265–279 : Author(s): Everson, I., D.G. Bone, J.L. Watkins and K.G. Foote
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Revised estimates of seabed areas within the 500 m isobath of the South Orkney Islands (subarea 48.2) and consequences for standing stock biomass estimates of nine species of finfish
increased from 5 to 30% for eight species and decreased by 20% for one. ... % for one. File: 12jones.pdf ... examined, the point estimate of total biomass increased from 5 to 30% for eight species and decreased by 20 ... and 250-500 m depth intervals. The updated estimates are about 1 424 (20%) n miles larger in area within ... by 20% for one. Une carte bathymetrique revisee des iles Orcades du Sud (sous-zone 48.2) est creke en ... and irregularly spaced measured and estimated depths was merged to produce one large dataset of depth soundings ... biomasse totale a augmente de 5 a 30% pour huit especes et diminuk de 20% pour la neuvieme. Eb1JTa ... OqeHKa o6qet ~ H O M ~ C C ~ I BO3pOCna Ha 5-30% AJIR 8 BHAOB M COKpaTHJIOCb Ha 20% AnR OifHOrO ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 197–204 : Author(s): C.D. Jones
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Acoustic data analysis and models of krill spatial distribution
. The wavenumber spectrum resembles a white noise at scales of 2-20 km, although at scales smaller than 1 km ... distribution of krill biomass is bimodal and appears to be the mixture of two log normal distributions ... . These two distributions may correspond to the between and within patch biomass. These results of data ... . The wavenumber spectrum resembles a white noise at scales of 2-20 km, although at scales smaller than 1 km ... 4-5.HHBap.H 1987 r., HCnOJIb30BaHbI B Tpex THnax onHCaHH$l npocTpaHcTBeHHoM arpera~HH KPHJI$l: cneKTpaJIbHOM ... ) and one third (33%) to a second log normal distribution (mean=1.76, SO=0.51). These two distributions may ... . The most probably frequency distribution of animal swarm size is the one that maximized the entropy ... attraction distance of the order of the swarm unit) AS" 1 cm/sec (aggregation speed = one tenth of krill ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 311–329 : Author(s): Morin, A., A. Okubo and K. Kawasaki
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The biology, ecology and development of fishery management advice for the anomuran crabs at South Georgia (CCAMLR Subarea 48.3)
and Vinuesa, 1999) and enters the fishery at an approximate age of 15 years (Lovrich, 1997). Reproduction ... diomedeae is one of the deepest occurring lithodids and has been caught at depths exceeding 2 500 ... crustaceans, estimating age and growth rate of the lithodids is problematic. The lack of persistent hard ... to otoliths in fish or statoliths in cephalopods, that record age or growth. In addi- tion, it is very hard ... available information on the biology and ecology of the lithodids at South Georgia and provides an overview ... further research should be directed in order to provide information on which to base the most appropriate ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 1–15 : Author(s): Belchier, M., T. Peatman and J. Brown
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A preliminary assessment of age and growth of Antarctic silverfish (Pleuragramma antarcticum) in the Ross Sea, Antarctica
-growing with a moderate longevity; the maximum estimated age was 14.3 years. Von Bertalanffy parameters ... and about two-thirds of the sampled fish could not be sexed. Precision estimates and age bias plots ... –11.0 and 15.1–15.5 cm. Mean lengths of 4.9 and 7.3 cm (at ages 1.3 and 2.3 years respectively ... estimated age was 14.3 years. Von Bertalanffy parameters derived for both sexes combined are: L∞ 22.1 ... reported here may be overestimated by one year. However, the estimated mean lengths at ages 1.3 and 2.3 ... sampled from the Ross Sea. 0 10 20 30 40 50 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Age (years) Fr eq ... ue nc y Age (years) Fr eq ue nc y 50 40 30 20 10 ... on board and again after one year stored frozen at –20°C did not differ in length. Von Bertalanffy ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 75–86 : Author(s): Sutton, C.P. and P.L. Horn
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Age, growth and mortality of Patagonian toothfish (Dissostichus eleginoides) caught off Kerguelen
was estimated to be –0.6 years and residual variance 2.9. Age distributions of toothfish caught by two vessels ... to measure precision; relative bias for the age data was estimated to be –0.6 years and residual ... variance 2.9. Age distributions of toothfish caught by two vessels showed discrepancies due to gear ... Paper Title: Age, growth and mortality of Patagonian toothfish (Dissostichus eleginoides) caught ... Estimated age (years) 0 10 20 30 40 50 T ot al le ng th ( cm ) 0 20 40 60 80 100 120 140 ... a ge ( ye ar s) 0 10 20 30 40 50 Reference age (years) 0 10 20 30 40 50 E st im at ed ... a South Georgia reference collection, compared to reference ages. 0 10 20 30 40 50 E st im at ed ... a ge ( ye ar s) 0 10 20 30 40 50 (a) (b) Ashford et al. 38 Figure 2: Age structure ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 29–41 : Author(s): Ashford, J., G. Duhamel, C. Jones and S. Bobko
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Length-at-age in juvenile Patagonian toothfish (Dissostichus eleginoides)
in the length density represent different age cohorts separated by one year. File: 01ashford.pdf ... represent different age cohorts separated by one year. ... . No difference was found between predicted and estimated ages. We conclude that the two dominant modes observed ... predicted and estimated ages. We conclude that the two dominant modes observed in the length density ... that the two dominant modes observed in the length density represent different age cohorts separated by one ... that the nucleus corresponds to a period of more than one year. Under either alternative the ages estimated ... by one year. (ii) Previous ages estimated using published von Bertalanffy parameters are too high ... to underestimation of age by one year. (iv) Further research is needed to test these alternatives to establish ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 1–10 : Author(s): Ashford, J., C. Jones, S. Bobko and I. Everson
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Using ecosystem monitoring data to detect impacts
years of its onset, but a fixed reference point method could have provided this sustained indication ... the early 1990s within a few years of its onset, but a fixed reference point method could have provided ... at will have one of two possible states relative to acrit. These states are α1 (at ≤ acrit) and α2 (at > acrit ... ., 2000; Miller, 2002). One of the ongoing chal- lenges faced by CCAMLR is to develop a manage- ment ... . From 1991 onwards, observations were generally (with one exception) below the mean for the baseline ... period. There was one anomaly (below the 5th percentile of the baseline distribution) in the seven ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 197–212 : Author(s): Hill, S.L., J. Forcada, P.N. Trathan and C.M. Waluda
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Supplementary data on exploited stocks in Division 58.5.1 (Kerguelen)
per fishing hour) is, however, lower than those observed for the two preceding cohorts (1979 and 1982 ... per fishing hour) is, however, lower than those observed for the two preceding cohorts (1979 and 1982 ... . An assessment of the biomass of individuals aged more than three years present over the Kerguelen Shelf ... corresponding to the arrival (at the age of 5 to 6 years) of these juveniles on the shelf. A catch limited ... to average length at sexual maturity (33.5 and 33.8 cm at the age of 9 years). The length frequency ... of the exploited population comprising mainly individuals aged between 7 and 11 years. The biomass of the shelf ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 147–161 : Author(s): Duhamel, G.
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Additional data on anti-Brucella antibodies in Arctocephalus gazella from Cape Shirreff, Livingston Island, Antarctica
in one sample with the RB test, and in five of the 86 samples (5.8%) using the c-ELISA test ... ; test. Antibodies against Brucella spp. were detected in one sample with the RB test, and in five ... antibodies in the Southern Hemisphere was recorded in two pinniped species from Antarctica: Antarctic fur ... from 77 live animals and nine from dead animals. Body fluid samples (blood, pleural fluid or pericardic ... from live animals, and the two positive results were obtained from dead animals (one pleural fluid ... juvenile females, one adult female, one juvenile male, three sub-adult males and two adult males. All ... detected in one sample with the RB test, and in five of the 86 samples (5.8%) using the c-ELISA test ... e n Antarctique car les batteries n'on pas encore 6te isol6es et il n'a encore et6 procede ?i aucune etude de ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 147–154 : Author(s): Blank, O., P. Retamal, P. Abalos and D. Torres