Search results
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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
. Feeding intensity was rather low for all species at the beginning of cruise. A rapid increase in feeding ... in the South Georgia area during the 1985/86 cruise of MT Carina Abstract / Description: A fish ... survey in South Georgia waters was undertaken from November 1985 to January 1986 as a part of the on ... -going fish stock monitoring program conducted by the Sea Fisheries Institute, Gdynia. Codends of two ... with the majority at stage Ill. Feeding intensity was rather low for all species at the beginning of ... October) and ended at the end of November/beginning of December because of low c.p.u.e. (Table 11). The ... fish examined in samples were at maturity stages from 11 to V. The prevailing number of fish were at ... maturity stage III (Figure 13). From December, an increasing percentage of gonads at stage IV in male ...
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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Cephalopod research in the Antarctic
of future commercial exploitation. Research is being carried out at BAS on the species composition ... major component of the Antarctic marine food web and it seems inevitable that they will be the subject ... and distribution of Antarctic cephalopods, their production and biomass, population dynamics and ... trophic relations. However, there is insufficient information at present for CCAMLR to formulate effective ... exploitation. Research is being carried out at BAS on the species composition and distribution of Antarctic ... insufficient information at present for CCAMLR to formulate effective policy for management of Antarctic ... distribution of other species and at different geographical locations. - 327 - Production and Biomass ... developed and a growth experiment has been run with Sepia officinalis, fed at a range of food rations and ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 323-334 : Author(s): Rodhouse, P.G.
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Diet of the Antarctic toothfish (Dissostichus mawsoni) from the Ross Sea, Antarctica (Subarea 88.1)
stomachs examined respectively). Fish sampled in 2001 were caught at depths of 317 to 2 154 m and ranged ... from 58 to 190 cm in total length (TL). Fish sampled in 2002 were caught at depths of 815 to 1 623 m ... Paper Title: Diet of the Antarctic toothfish (Dissostichus mawsoni) from the Ross Sea, Antarctica ... (Subarea 88.1) Abstract / Description: The diet of Antarctic toothfish (Dissostichus mawsoni) captured by ... examined respectively). Fish sampled in 2001 were caught at depths of 317 to 2 154 m and ranged from 58 ... to 190 cm in total length (TL). Fish sampled in 2002 were caught at depths of 815 to 1 623 m and ... –March 2001 and January–March 2002). Fish were caught by bottom longline at depths of 317–2 154 m in ... distribution of the 2001 sample is thus characterised by a broadly defi ned peak of juvenile fi sh (at about ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 113–123 : Author(s): Fenaughty, J.M., D.W. Stevens and S.M. Hanchet
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An assessment of the mackerel icefish (Champsocephalus gunnari) off Heard Island
(Champsocephalus gunnari) populations at Heard Island are developed from the results of four scientific surveys ... survey conducted at the end of the 1997 fishing season would allow for a catch limit on the Heard Plateau ... Paper Title: An assessment of the mackerel icefish (Champsocephalus gunnari) off Heard Island ... Abstract / Description: Assessments of the abundance and potential yield of the mackerel icefish ... and potential yield of the mackerel icefish (Clzanzpsocephalus guiznari) populations at Heard Island ... tonnes for Sliell Bank. An assessment based on the results of a survey conducted at the end of the 1997 ... to the numbers at age 2, using a natural mortality coefficient (M) of 0.4 (yr-l) (this is the mid ... , with a range of about two orders of magnitude. At South Georgia and Kerguelen it has been found that ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 79–101 : Author(s): de la Mare, W.K., R. Williams and A.J. Constable
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The use of predator-derived krill length-frequency distributions to calculate krill target strength
krill sampled from the diet of predators to provide a length-frequency distribution of krill at times ... to gain important estimates of krill biomass at times of the season hitherto unavailable from ... Paper Title: The use of predator-derived krill length-frequency distributions to calculate krill ... , i.e during logistic/resupply operations. This will allow a robust estimate of krill abundance to be ... length-frequency distribution of krill at times when it is possible to run automated shipboard acoustic ... -board data collection systems it will be possible to gain important estimates of krill biomass at times ... availability of krill to predators can change markedly over the course of the breeding season (Reid at al ... that most indices of predator performance usually reflect conditions over periods of at least a month ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 155–163 : Author(s): Reid, K. and A.S. Brierley
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The fishery for Patagonotothen brevicauda guntheri in CCAMLR Subarea 48.3
only ever caught at Shag Rocks. Therefore the South Georgia catches were almost certainly of another ... / Description: Fine-scale data supplied to CCAMLR for 1987/88 showed that the catches of P atagonotothen ... brevicauda guntheri were five times greater in the South Georgia area than at Shag Rocks. Previous survey ... species. The small size of P.b. guntheri means that they can only be caught with net meshes so small that ... allowable catch (TAC) was set at 12000 tonnes (Conservation Measure 16NIII). At the end of the fishing ... information on the fishery. 2. FINE-SCALE DATA ON THE P.B. GUNTHERI FISHERY At the time of preparation of ... likely to be dominated by small individuals. Of particular concern is Dissostichus eZeginoides at Shag ... indicated that P.h. guntheri are not found at South Georgia, reported catches of this species in South ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 275–283 : Author(s): Everson, I. and C. Mitchell
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Statistical power to detect changes in growth rates of Antarctic fur seal pups
Monitoring Program Standard Method C1 (B). Using estimates of variance in pup weights obtained at Seal Island ... Method (50 pups of each sex, weighed on four dates at 28-day intervals) would result in the ability to ... Paper Title: Statistical power to detect changes in growth rates of Antarctic fur seal pups ... Abstract / Description: Numerical simulations were used to investigate the power of methods for detecting ... Standard Method C1 (B). Using estimates of variance in pup weights obtained at Seal Island (60 0 59.5'S ... weaning. Method (B) requires weighing samples of 50 male and 50 female pups at monthly intervals ... dates at 28-day intervals, of sampling smaller numbers of pups at more frequent intervals, and of the ... equal to the weighted averages of those observed in females at Seal Island (Table 2). If four samples ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 399–409 : Author(s): Boveng, P., J.L. Bengtson and M.E. Goebel
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Acoustic data analysis and models of krill spatial distribution
wavenumber spectrum resembles a white noise at scales of 2-20 km, although at scales smaller than 1 km the ... Paper Title: Acoustic data analysis and models of krill spatial distribution Abstract ... descriptors of krill spatial aggregation: power spectra for krill biomass fluctuations in space, semivariogram ... (spatial autocorrelation of krill biomass) and the frequency distribution of krill biomass estimate. The ... spectrum resembles a white noise at scales of 2-20 km, although at scales smaller than 1 .km the spectrum ... , indicating an approximately equal variance at all scales (white noise). The result of Weber et al. (1986 ... at small scales. The first step of our approach is to examine the krill biomass distribution in the ... estimated average krill biomass (g/m3; 200 k kHz estimates) at each meter of depth ranging from 3 to 185 m ...
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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Some comments on the procedure for testing estimators of krill abundance which utilise survey data
Paper Title: Some comments on the procedure for testing estimators of krill abundance which ... utilise survey data Abstract / Description: Since krill distributional data do show evidence of spatial ... correlation, estimators of abundance which attempt to model such effects (such as those based on Kriging ... computer generation of krill distribution patterns, which are compatible with existing information on the ... estimation from surveys of marine resources is to place a set of transects at random in the area of interest ... distribution was definitely non-random at the scale of the whole area surveyed, although there were ... indications of randomness at a smaller scale. Accepting therefore that krill distributions do exhibit ... discussed in Miller and Hampton, 1989b) under the assumption of a random distribution at each level. Two ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 191–205 : Author(s): Butterworth, D.S., D.L. Borchers and D.G.M. Miller
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Krill biomass assessment in Statistical Area 48 from the RV AtlantNIRO data - Autumn 1989/90
Islands was assessed at 3.8 million tonnes, most of which was concentrated in the waters of the Weddell ... 1989/90 Abstract / Description: A krill biomass census survey was carried out at two fishing grounds ... Sea. In contrast to this site, the one off the South Orkney Islands is well-established in terms of ... tonnes. Most of this stock was concentrated in the south-western part of the Coronation Island shelf ... method (0-100-0 m) at a towing speed of 3.2 to 3.6 knots. Trawling depth was controlled by a trawl probe ... census survey was carried out at two fishing grounds in the South Sandwich and South Orkney Islands ... stock on the poorly studied site off the South Sandwich Islands was assessed at 3.8 million tonnes ... , most of which was concentrated in the waters of the Weddell Sea. In contrast to this site, the one ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 115–121 : Author(s): Fedotov, A.C.