Search results
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Possible effects of different levels of krill fishing on predators – some initial modelling attempts
~HMK~MM), OAHaKO IIpOBeAeHMe OCHOBaHHblX Ha 3 T O M IIOAXOAe paC1.leTOB 6b1no OTJIOXeHO ,Q0 ... indican que la variabilidad delreclutamiento anual de kril tiene como resultado el que las poblaciones ... como para se;rvir de posible base a recomendaciones de ordenacion. Se crea la estructura matemfitica ... modelling attempts Abstract / Description: An initial attempt is made to develop the modelling framework ... suggested by the Joint Meeting of CCAMLR's Working Group on Krill (WG-Krill) and Working Group for the ... CCAMLR Ecosystem Monitoring Program (WG-CEMP) in 1992, in order to investigate the possible effects of ... krill fishing on krill predators. First, estimates are made of the parameters of predator survival rates ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 79–97 : Author(s): Butterworth, D.S. and R.B. Thomson
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Changes in the fish biomass around Elephant Island (Subarea 48.1) from 1976 to 1996
a stratum were taken from Kock and Harm (1995). All trawl sites were selected randomly but restricted ... range 100 to 400 m where fish were more abundant than in the remaining two strata. Trawl sites ... to the trawl gear. There is a danger, when successive surveys use the same sampling sites, of the results ... the trawl, repeated sites were often only within 1 or 2 n miles of the original sites which balanced ... Paper Title: Changes in the fish biomass around Elephant Island (Subarea 48.1) from 1976 to 1996 ... Abstract / Description: Finfish stocks in the Antarctic Peninsula region (Subarea 48.1) were exploited ... from 1978/79 to 1988/89, with most of the commercial harvesting taking place in the first two years of ... the fishery. Results of bottom trawl surveys conducted by Germany in the vicinity of Elephant Island ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 165–189 : Author(s): Kock, K.-H
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An assessment of the merits of length and weight measurements of Antarctic krill Euphausia superba
publicadas de las distintas mediciones de talla como pronosticadores del peso en fresco 0 seco del krill ... mediciones de talla al peso en fresco y seco como funciones de sexo, etapa de madurez y etapa de muda. Se ... Paper Title: An assessment of the merits of length and weight measurements of Antarctic krill ... the relationships of three length measurements to wet and dry weight as functions of sex, maturity ... stage and moult stage. The range of coefficients and exponents for these relationships are examined and ... an example given to indicate the potential such variation has for introducing error into estimates of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 371-373 : Author(s): Morris D.J., J.L. Watkins, C. Ricketts, F. Buchholz, and J. Priddle
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The error of the biomass estimate as a function of survey parameters and the statistics of a density field of krill aggregations
y los metodos de calculo de probabilidades. La estimacion de biomasa se determina como el producto de ... y el coeficiente de variacion sirven como caracteristicas de campo de las cuales depende el error. La ... secciones transversales sirven como parametros de prospeccion. Las relaciones aqui descriptas pueden ser ... como para la planificacion de una prospeccion sobre la base de estimaciones a priori de las ... Paper Title: The error of the biomass estimate as a function of survey parameters and the ... the dependence of relative sampling error in a biomass estimate (from a survey) on the statistical ... characteristics of the fish concentration density field and on parameters of the survey itself, have been derived ... with the help of mathematical statistics and methods of calculus of probabilities. The biomass estimate ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 213-228 : Author(s): Kizner, Z.I.
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Survey design to estimate krill abundance during FIBEX
abundancia del krill, asf como la recopilaci6n de datos sobre la talla, densidad y distribuci6n de los ... aguas superficiales asf como sobre las aves marinas. El area de estudio fue subdivida en varias ... . Se trat6 alas subareas como estratos y se utiliz6 un metodo de muestreo aleatorio estratificado. Se ... seraient effectues que dans la strate de haute den site anticipee entre la limite de la banquise et la ... of the primary aims of FIBEX (First International BIOMASS Experiment), 1981 was to study the ... 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 ... krill abundance as well as collection of data on the size, density and distribution of krill swarms. In ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 253–263 : Author(s): Everson, I., I. Hampton and G.M. Jolly
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The gentoo penguin as a candidate species for the CCAMLR Ecosystem Monitoring Program
of general biology; and (vi) availability of baseline data at one or more sites. On this basis ... Shetland Islands (Trivelpiece et al., 1987). For other sites within the Antarctic Peninsula Integrated ... Paper Title: The gentoo penguin as a candidate species for the CCAMLR Ecosystem Monitoring ... years at Bird Island, South Georgia and at the South Shetland Islands (both within Integrated Study ... Regions (ISRs) of the CCAMLR Ecosystem Monitoring Program), we suggest (and provide a full bibliography of ... supporting literature) that the gentoo penguin meets the specified criteria qualifying species for inclusion ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 483–488 : Author(s): Croxall, J.P. and T.D. Williams
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A preliminary assessment of age and growth of Antarctic silverfish (Pleuragramma antarcticum) in the Ross Sea, Antarctica
modes at 8–20 and 36–53 mm in Terra Nova Bay, Ross Sea, and assumed that these represented ... silverfish off Terra Nova Bay (Ross Sea) during the summer of 1987/88. They also defined age groups accord ... ) and Radtke et al. (1993). Gerasim- chuk (1992) studied fish from the Cosmonaut Sea, Mawson Sea and Prydz Bay ... Terra Nova Bay (Ross Sea, Antarctica). Polar Biol., 19 (1): 37–51. Hubold, G. 1984. Spatial ... antarcticum) in the Ross Sea, Antarctica Abstract / Description: Antarctic silverfish (Pleuragramma ... antarcticum) were sampled during a trawl survey in the Ross Sea, Antarctica. Biological data, including fish ... otoliths were used to estimate ages and von Bertalanffy growth parameters. The species is relatively slow ... -growing with a moderate longevity; the maximum estimated age was 14.3 years. Von Bertalanffy parameters ...
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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CCAMLR ecosystem monitoring and a feedback management procedure for krill
and experimental sites may be able to be established in the near future. 4. DISCUSSION There are considerable ... this should not preclude an examination of the experimental approach, despite the existing CEMP sites being ... / Description: The CCAMLR Ecosystem Monitoring Program has been developing a technique which might detect short ... attributable to loss of prey through fishing activities. The principal fishery in the CCAMLR Convention Area is ... the krill fishery and this paper examines ways in which the information being obtained from the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 345–350 : Author(s): Constable, A.J.
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Age and growth of spiny icefish (Chaenodraco wilsoni Regan, 1914) off Joinville–D’Urville Islands (Antarctic Peninsula)
, Channichthyidae) samples caught in Terra Nova Bay, East Antarctica. Polar Biol., 12 (8): 735–738. Vacchi ... with feeding habits of C. wilsoni. With little variation between differ- ent seasons or sites, post-larvae ... was then ground using decreasing grit abrasive papers and finally polished on lapping films with 0.05 micron ... selected for the study, consisting of 120 females and 98 males. The age of fish was estimated by counting ... in moulds. The precision of age estimates between readings was tested applying both the average ... percent error (APE) and the coefficient of variation (CV). Conversely, the accuracy of age estimates was ... not tested, so that present ageing data haveto be considered with caution. The estimated age range was ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 115–130 : Author(s): La Mesa, M., A. De Felice, C.D. Jones, K.-H. Kock
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Directed research. Antarctic Marine Living Resources (AMLR). A program development plan
ecosistema marine de la Antartida como parte del Programa Antartico de 105 Estados Unid05; (B) El ... reservas de los recursos vivos marinos Ant~rticos, asi como tambien en el(los) ecosistema(s) del(de los ... pesca en tanto las especies objetivo como alas especies que son capturadas por accidente durante las ... ,l(HHtJeCTBa CHCTeMY yrrpaBJIeHHJI ~HBbIMH pecypcaMH 3KOCHCTeMhl AHTapKTHKH. Yt{acTHe CIlIA HarrpaBJIeHO Ha ... plan Abstract / Description: The US Antarctic Marine Living Resources (AMLR) Program is a national ... program providing information needed for US policy regarding the conservation and management of the marine ... living resources in the ocean areas surrounding Antarctica. The program is in support of US participation ... in the Commission and Scientific Committee of the Convention for the Conservation of Antarctic Marine ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 363-373 : Author(s): Office of Science and Technology, NMFS, NOAA, US Department of Commerce (USA)