Search results
-
Small scale krill surveys: simulations based on observed euphausiid distributions
Edition. New York: W.H. Freeman and Company. pp. 859. 249 Table 1: Mean and standard deviation ... that the coefficient of variation (CV) of mean krill density varies inversely with mean density, and is ... that with probability of Type I and Type II errors 0.1 and 0.2 respectively, about 100 transects would ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 245–256 : Author(s): Agnew, D.J. and S. Nicol
-
Age determination of Champsocephalus gunnari Lönnberg, 1905 (Channichthyidae) taken in the South Georgia area in 1990
9+ were present in catches. Two peaks in size composition correspond with fish of the 1987 and 1985 ... /86 year classes. The first small peak corresponds with the strong 1988 year class. File: 17 ... size composition correspond with fish of the 1987 and 1985/86 year classes. The first small peak ... corresponds with the strong 1988 year class. Re.sume En janvier/fevrier 1990, la Grande-Bretagne et ... , and 31-33 cm with the maximum being in the second size group (Hill Cove) while in February they were ... 16-18,24-26 and 30-34 cm with the maximums being in the second and third size groups (Akademik ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 285–293 : Author(s): Kochkin, P.N.
-
Genetic variations and population structure of krill from the Prydz Bay region of Antarctic waters
consistent with the hypothesis that all samples were derived from a single breeding population of krill. The ... results of this study agree closely with genetic data from other studies on krill in the Atlantic sector ... result consistent with the hypothesis that all samples were derived from a single breeding population ... of krill. The results of this study agree closely with genetic data from other studies on krill in ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 271-273 : Author(s): MacDonald, C.M., R. Williams and M. Adams
-
Detection and quantitative estimation of krill concentrations by hydroacoustic instruments
in areas surveyed. The task of detecting surface concentrations of krill can be solved with the help ... FIBEX program. It was shown that the hydroacoustic device Simrad SK-120, with TVG switched off, is ... detecting surface concentrations of krill can be solved with the help of towed acoustic antennae. The ... shown that the hydroacoustic device Simrad SK-120, with TVG switched off, is capable of registering ... eddies, with certain oxygen, silicon, phosphorus concentrations and other hydrological conditions. Such ... . With the onset of darkness, the groups and aggregations usually come closer to the surface and ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 123-139 : Author(s): Yudanov, K.I.
-
Estimating krill recruitment and its variability
and above) of 0.339 with a standard deviation (SD) of 0.100. The corresponding result for recruitment ... nine surveys is 0.552 with a standard deviation of 0.074. A number of the assumptions needed for ... number of krill aged one year to the number of krill aged one year and above) of 0.339 with a standard ... two-year-old krill to the number aged two and above) from nine surveys is 0.552 with a standard ... . The problem with krill is that there is no reliable method of direct age determination. One indirect ... with the length frequency distributions of each age class. It is clear that there is little prospect ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 55–69 : Author(s): de la Mare, W.K
-
Status of the krill stock around Elephant Island in 1991/92 and 1992/93
AROUND ELEPHANT ISLAND IN 1991192 AND 1992193 V. Loeb Moss Landing Marine Laboratories PO Box 450 ... austral summers of 1991/92 and 1992/93 are described and compared with information from previous years ... other years appears to be associated with female maturity development and spawning during the early ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 7–33 : Author(s): Loeb, V. and V. Siegel
-
Measurements of differences in the target strength of Antarctic krill (Euphausia superba) swarms at 38 kHz and 120 kHz
in average target strength at these two frequencies. The results are in good agreement with recent ... experimental work on the target strength of encaged E. superba at 38 and 120 kHz but are in major conflict with ... are in good agreement with recent experimental work on the target strength of encaged E. superba at ... 38 and 120 kHz but are in major conflict with the 120 kHz - to - 50 kHz target strength conversion ... kHz, with 120 kHz being probably the most common frequency (Miller and Hampton, 1989). Knowledge of ... target strengths at 120 kHz were some dB higher than at 38 kHz, in general agreement with predictions ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 75–86 : Author(s): Hampton, I.
-
Southern elephant seals and CCAMLR
(incluyendo algunos resultados franceses y australianos), sobre el elefante marine austral (Mirounqa leonina ... las flotas pesqueras, han sido sugeridas como causas posibles de la declimacion del elefante marine ... . Como tal, el estudio de las distribuciones tanto espacial como temporal del elefante marine durante ... in marine areas segregated from adult cows and younger (smaller) age classes of both sexes and may ... been recently confirmed for the Macquarie Island stock. The availability of food, competition with ... rapidly growing fur seal populations and competition with fishing fleets have all been suggested as ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 465-473 : Author(s): Bester, M.N. and D.G.M. Miller
-
Results of fish stock assessment survey, South Georgia, December 1987 - January 1988
). The Commission for the Conservation of Antarctic Marine Living Resources has adopted a set of measures aimed ... the continued removal of sexually mature individuals without new recruitment to rebuild the population ... Island, U.S.A., January 1988. CRAWFORD, R. 1988. U.S. Antarctic marine living resources (AMLR) program ... and status of exploited Antarctic fish stocks: a review. Biological Investigations of Marine Antarctic ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 19-52 : Author(s): McKenna, Jr., J.E. and S.B. Saila
-
Can we use discriminant function analysis to sex penguins prior to calculating an index of a morphometric characteristic?
a certain proportion of birds. Two overlapping normal distributions are used to show ... that there is a difference between the real mean characteristic for a sex, and the apparent mean derived by sexing the birds ... of birds with greater than 80% success, the difference between the true and apparent mean is likely ... to be undetectable when fewer than 600 birds are sampled. Therefore, under most normal sampling regimes ... the sex of individuals, it is only able to correctly sex a certain proportion of birds. Two overlapping ... for a sex, and the apparent mean derived by sexing the birds using discriminant analysis. When ... discriminant functions are able to correctly determine the sex of birds with greater than 80% success ... , the difference between the true and apparent mean is likely to be undetectable when fewer than 600 birds ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 259–272 : Author(s): Agnew, D.J.