Search results
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Fish stock assessment survey in Subarea 48.3
this year's survey was slightly later in the year than the 1990 survey the results are broadly similar ... for many years mainly because this area has formed the focus for much of the commercial fishing activity ... of previous years (Parkes et al., 1990) with a series of randomly located trawl stations down to a depth ... if the net came fast, or bad ground was encountered during the tow necessitating early retrieval of the net ... decline by comparison with results from the 1989/90 season. Other species do not show a similar dramatic ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 25–67 : Author(s): Everson, I., G. Parkes, K.-H. Kock, S. Campbell, Z. Cielniaszek and J. Szlakowski
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Distribution characteristics of krill aggregations in the fishing ground off Coronation Island in the 1989/90 season
from other years, e.g. November 1984 to February 1985 (Kasatkina, 1987). Table 4 shows how the mean ... the temperature gradient of the thermocline which improves conditions for phytoplankton (Latogursky et al., 1972 ... . It is known that a deterioration of feeding conditions leads to krill being scattered (Latogursky, 1972 ... 6ecno3BoHollHbIX. IIMaTepl-laJIbI IIepBoro BcecoI03Horo cI-IMno3I-1YMa. EOpOK, 1972: 72-79. JIaTorypCKHH:, B.H ... aggregations. Krill was harvested by standard midwater trawls with a horizontal mouth opening of 33 m. All ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 49–73 : Author(s): Kasatkina, S.M. and V.I. Latogursky
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Revised age and growth estimates for Antarctic starry skate (Amblyraja georgiana) from the Ross Sea
georgiana in the Ross Sea suggested that these skates initially grow very rapidly for about five years ... generated that suggest much slower growth, greater ages-at-maturity (about 20 years compared with 6–11 years ... ) and greater maximum ages (28–37 years compared with 14 years). Several pieces of circumstantial evidence ... that these skates initially grow very rapidly for about five years, after which growth almost ceases (Francis ... 1 1 2 1 2 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 3 1 1 2 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 2 1 1 2 1 1 1 1 1 2 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 N = 96 Reader 1, reading 1 (years) 0 10 20 30 40 R ea de r 1 , r ea di ng 2 (y ea rs ) ( m ea ... large discrepancies between the two readers. 10 20 30 R ea de r 2 , r ea di ng 4 (m ea ... 30 40 R ea de r 1 , r ea di ng 2 (y ea rs ) ( m ea n ± 2S ... r 2 , r ea di ng 4 (y ea rs ) ( m ea n ± 2S E ) 40 30 20 10 N = 96 Francis and Gallagher ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 211–220 : Author(s): Francis, M.P. and M.J. Gallagher
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Supplementary data on exploited stocks in Division 58.5.1 (Kerguelen)
. An assessment of the biomass of individuals aged more than three years present over the Kerguelen Shelf ... of the stock in five years. The implementation of conservation measures does not, however, always allow ... ; Duhamel, 1987). The observed trend will later have repercussions on the adult stock, with some inertia ... of adult stock of three or four years earlier, which are caught in the trammel nets. Then a gradual ...
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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A stock assessment model of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea Region incorporating multi-year mark-recapture data
Sea Region incorporating multi-year mark-recapture data Abstract / Description: An exploratory ... , and hence a multi-year mark-recapture tagging program was initiated by New Zealand fishing vessels in 2001 ... was developed for Antarctic toothfish in the Ross Sea region that incorporates multi-year release of tagged fish ... and subsequent multi-year data of recapture of tagged fish in conjunction with fishery catch-at-age data ... . 2008. A hypo- thetical life cycle for Antarctic toothfish (Dis- sostichus mawsoni) in the Ross Sea ... . Gaffney. 2008. Population subdivision in the Antarctic toothfish (Dis- sostichus mawsoni) revealed ... , S. and P.J. Grimes. 2010. Length- and age-at-spawning of Antarctic toothfish (Dis- sostichus mawsoni ... IncorporAtIng multI-yeAr mArk-recApture dAtA S. Mormede and A. Dunn National Institute of Water ...
Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 39–62 : Author(s): Mormede, S., A. Dunn and S.M. Hanchet
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Observations of fishing operations on a krill trawler and distributional behaviour of krill off Wilkes Land during the 1985/86 season
-and-frozen krill must be processed within 3 hours of capture, whereas meal can be processed much later ... : off Enderby Land, off Wilkes Land (including George V Land), and the Scotia Sea. In earlier years ... off Africa. In recent years, the through-year activity of the trawlers has come to be incorporated ... offshore areas, the concentrations may vary from year to year. 3.2 High Yielding Fishing Area ... of fished swarms ranged from 100 m to 10 km with different distributions occurring in different ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 335-368 : Author(s): Ichii, T.
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Otolith microstructure of juvenile mackerel icefish (Champsocephalus gunnari) (Channichthyidae) in the South Georgia area
year classes arising from spawning in the 1999/2000 and 2000/01 split-years. The mean width of daily ... year class lasted four months. This was estimated based on a retrospective count of daily increments ... . TL varied from 5.5 to 10.4 cm for fish in their first year (120–250 days) to 12.5–13.3 cm in 1-year ... fish between consecutive year classes. File: 10shcherbich.pdf ... survey of juveniles in February–March 2002 on the South Georgia shelf. Juvenile fi sh comprised two year ... classes arising from spawning in the 1999/2000 and 2000/01 split-years. The mean width of daily otolith ... at 500 days (TL 13.1 cm). The pelagic stage of egg incubation development for fi sh of the 2001/02 year ... varied from 5.5 to 10.4 cm for fi sh in their fi rst year (120–250 days) to 12.5–13.3 cm in 1-year-old ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 173–181 : Author(s): Shcherbich, L.V
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Krill fishing in the Scotia Sea in relation to bathymetry, including the detailed distribution around South Georgia
. In these years more eastern areas were targeted by the fishery. The analyses emphasise that it is necessary ... weeks in a year and at other than a local scale. Krill population dynamics operate over ocean basin ... Statistical Bulletins for each quarter of the year and it is those data that have been used in this study ... "W and 54"s) were targeted in some years (CCAMLR Statistical Btrlletins). The fishery during late winter ... this area but also operated further west on a range of banks associated with submarine valleys. The ... results are discussed in relation to the ecology of krill and the fishery's interaction with local ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 1–17 : Author(s): Murphy, E.J., P.N. Trathan, I. Everson, G. Parkes and F.H.J. Daunt
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Integration of CPUE data into assessments using the Generalised Yield Model
/ Description: For the last three years, CCAMLR's Working Group on Fish Stock Assessment (WG-FSA) has ... For the last three years, CCAMLR's Working Group on Fish Stock Assessment (WG-FSA) has accorded ... to the development o f metlzods o f integrating di f ferent indicators o f stock status into assessments using ... in early and later seasons have been estimated'. Unfortunately, there is no clear way of resolving ... three years, CCAMLR's Working Group on Fish Stock Assessment (WG-FSA) has accorded high priority ... , CCAMLR INTRODUCTION For several years CCAMLR's Working Group on Fish Stock Assessment (WG-FSA) has ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 65–74 : Author(s): Kirkwood, G.P. and A.J. Constable
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Potential nursery areas for fish in the Prydz Bay region
it, but the southern, eastern and western margins had low or zero catches. The length frequency distribution (Figure ... reasonably well with the 0+, 1+ and 2+ year groups established by Hubold and Ekau (1986) for P. antarcticum ... , except in one station near the shelf edge at the eastern side of the bay (Figure 4). A wide range ... data for the kriU fishery that took place in the Prydz Bay area in the early 1980s, but if it followed ... survey with a fine-meshed midwater trawl in Prydz Bay in January/February 1991 indicated the potential ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 369–380 : Author(s): Williams, R.