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Analyses of acoustic line-transect data from the waters around South Georgia: estimation of krill (Euphausia superba Dana) – biomass
place in the South Georgia marine ecosystem and involved a major interdisciplinary program of data ... ). Antarctic Nutrient Cycles and Food Webs. Berlin: Springer-Vedag. pp. 516-533. EVERSON,1. 1984. Marine ... , 1., J.L. WATKINS, D.G. BONE and K.G. FOOTE. 1990. Implications of a new acoustic target strength ... of density. Document WG-Krill-91/8. CCAMLR, Hobart, Australia: 19 pp. FOSTER, T.D. 1984. The marine ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 225–243 : Author(s): Murphy, E., I. Everson and A. Murray
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The Patagonian toothfish (Dissostichus eleginoides) fishery in the Kerguelen Islands (Indian Ocean sector of the Southern Ocean)
deal of missing data concerning by-catch and the number of birds killed. These data have been ... + β18 n dead birds + β19 n by-catches. This model has 20 parameters. The number of birds killed ... 5%. For the period from 1997 to 2004, the effect of the number of birds killed and of by-catch on the CPUE is non ... , that is from 1990 to 2004, if the number of birds killed and of by-catch are not taken into account ... eleginoides) have been fished in the Kerguelen Islands zone for 20 years, firstly with trawlers and more ... recently with longliners. This is the oldest fishery targeting D. eleginoides in the Indian Ocean sector of ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 1–25 : Author(s): Lord, C., G. Duhamel and P. Pruvost
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Line weights of constant mass (and sink rates) for Spanish system Patagonian toothfish longline vessels
from attack by whales as lines are brought to the surface. Fishing vessel, location and gear ... ) and a new hook line (3.5 mm diameter monofila- ment nylon). By this design (see Figure 1), branch ... broke and time did not permit production of a new mould. Therefore, the remaining 8 kg weights and all ... of lofting in propeller turbulence, which slows sink rates and increases exposure of sea- birds to baited ... with seabirds. The weights typically used are collections of rocks enclosed in netting bags. During ... relationship between the sink rates of longlines equipped with bags of rocks (4, 6 and 8 kg) and those with ... steel weights of equivalent masses. The purpose of the experiment was to provide vessel operators with ... the option of substituting steel weights for rock weights while remaining in compliance with the sink ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 93–106 : Author(s): Robertson, G., C.A. Moreno, E. Gutiérrez, S.G. Candy, E.F. Melvin and J.P. Seco Pon
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Physical oceanographic setting of the Siedlecki January 1987, South Shetland Island data set
of the National Marine Fisheries Service REFERENCES CARMACK, E. and T. FOSTER. 1975. On the flow of water out ... data set. New York: Columbia University Press, 11 pp., 233 plates. GORDON, A.L. 1988. Spatial ... and thermohaline zonation of the Antarctic Circumpolar Current at Drake Passage. Journal of Marine Research 40 ... mixing processes of Bransfield Straits water (derived from the Weddell, with further local modification ... the Scotia Front protrudes to the south, perhaps associated with mesoscale structures. The Weddell ... -Scotia Confluence in the Bransfield Straits is associated with abundant krill populations. It is ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 161-184 : Author(s): Gordon, A.L.
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Preliminary report on biological observations and exploratory fishing data collected in the South Georgia area during the 1985/86 cruise of MT Carina
249 traits a l'aide d'un maillage de 60 mm en dehors de la zone protegee de 12 milles marins au ... . 1 ---_. --------_ .. ,_._----_. -- ... -. --.------- -.-._ ..... __ ._---_ .....• -.... _-- ---- Miscellaneous 1983/84 marine 'fishes 1984/85 62 1985/86' ~ 40 44 148 73 77 38 49 149 ,:". '-l '-l 54 ... marins (ligne brisee). Les numeros 55 a 64 et 99 sont des sous-divisions d'Emerson (1984 ... mesh sizes (47 and 60 mm) were used with a bottom trawl of 32 m head rope. Catch data were collected in ... . Sampling tows, including some tows inside the 12 Nm zone, were made with 47 mm mesh size codends. Fifty six ... determinations. The total catch with 60 mm mesh size codends was 1305.4 tons with a mean CPUE of 1822 kg/hour. C ... of C. gunnari were found with modes of 18 and 28 cm. The length range of C. aceratus was 25–72 cm. P ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 65-97 : Author(s): Kreft, K. and J. Szynaka
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Target strengths of krill at 136 and 20 kHz
. Ensonification of encaged live krill. For aggregations with mean lengths from 45 to 50 mm the mean single-krill ... target strengths range from-68 to-69 dB at 136 kHz. For aggregations with mean lengths from 43 to 47 mm ... . For aggregations with mean lengths from 47 to 50 mm the mean target strengths ranged from-71 to-75 dB ... . At the same frequency for aggregations with mean lengths in the range 41 to 47 mm the mean single ... aggregations with mean lengths from 45 to 50 mm the mean single-kriU target strengths range from -68 to -69 dB ... at 136 kRz. For aggregations with mean lengths from 43 to 47 mm the mean single-kriU target ... strengths range from -71 to -77 dB at 20 kRz. Trawl hydroacoustic method. For aggregations with mean ... aggregations with mean lengths in the range 41 to 47 mm the mean single-krill target strength is in the range ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 141–157 : Author(s): Kasatkina, S.M.
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The biology, ecology and development of fishery management advice for the anomuran crabs at South Georgia (CCAMLR Subarea 48.3)
in the permit for exploratory research fishing issued by the US National Marine Fisheries Service to the FV ... . 1894. Descriptions of new genera and species of crabs of the family Lithodidae, with notes ... bottlenecks in the distribution of marine Crustacea: tem- perature constraints in the family Lithodidae ... poorly understood with great uncertainty surrounding their trophic ecology and life histories. Recent ... undertaken if there is continued interest in the fishery. However, low market value and interest coupled with ...
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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Distribution of the Soviet krill fishing fleet in the South Orkneys area (Subarea 48.2) during 1989/90
Atlantic Research Institute of Marine Fisheries and Oceanography (AtlantNIRO) 5 Dmitry Donskoy St ... fishing ground off the northwestern tip of Coronation Island. CPUE showed variability with a minimum in ... hydrodynamic characteristics of the area, for example a complex current around the islands together with ... north-east of the region. The fleet was observed drifting with the current together with krill ... aggregations. A maximum CPUE (3.8 tonnes/hour) was recorded at the beginning of the period, with a subsequent ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 51–62 : Author(s): Sushin, V.A
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Modelling catch and effort data using generalised linear models, the Tweedie distribution, random vessel effects and random stratum-by-year effects
generalised linear model (GLM) with a square-root link function and a unit variance function. A time series of ... together with ‘baseline’ parameter estimates, their variance–covariance matrix, and the inverse-link ... function. An alternative GLM with a more rigorous theoretical basis is introduced here. Catch is modelled ... as the response variable using a GLM with a power variance function, with the power parameter (λ ... in a generalised linear model (GLM) with a square-root link function and a unit variance function. A ... ’ parameter estimates together with ‘baseline’ parameter estimates, their variance–covariance matrix, and the ... inverse-link function. An alternative GLM with a more rigorous theoretical basis is introduced here ... . Catch is modelled as the response variable using a GLM with a power variance function, with the power ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 59–80 : Author(s): Candy, S.G
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Depth distribution and spawning pattern of Dissostichus eleginoides at South Georgia
, A. Watson, K. Berkieta and J. Pearce Marine Resources Assessment Group Ltd 47 Prince's Gate London SW7 ... in relation to their size is not a new Depth distribution and spawning pattern of D. eleginoides finding ... Statistics with S-Plus. Second Edition. Springer, New York: 548 pp. Zhivov, V.V. and V.M. Krivoruchko ... with an approximately linear relationship existing between depth and fish length. A statistically ... significant pattern of changing mean length at depth with month was detected, suggesting movement of animals ... both up and down slope at particular times of year. Months with a high mean length at depth are May and ... August, and with a low mean length at depth- April and July. Examination of maturity data suggests that ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 19–36 : Author(s): Agnew, D.J., L. Heaps, C. Jones, A. Watson, K. Berkieta and J. Pearce