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Results of fish stock assessment survey, South Georgia region, November - December 1986
. The estimated biomass.of Dissostichus eleginoides is about 70% lower than in 1984/85 (Kock 1985b). Length ... Paper Title: Results of fish stock assessment survey, South Georgia region, November- December ... 1986 Abstract / Description: Biomasses and length compositions of eight stocks from South Georgia are ... described based on results of a stratified random bottom trawl survey. A total of 124 tows were undertaken ... . Biomass was estimated based on stratified swept-area calculations. Estimates of biomass of Notothenia ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 143-183 : Author(s): Gabriel, W.L.
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Attribtuion of acoustic echoes to squid in the south Atlantic
Paper Title: Attribtuion of acoustic echoes to squid in the south Atlantic Abstract / Description ... : During a research cruise of the British Antarctic Survey ship RRS James Clark Ross in February 1996, more ... than 2 000 individuals of the ommastrephid squid, Martialia hyadesi, were caught in a single haul made ... the analysis of acoustic data gathered during this haul and a survey of the immediate vicinity, in ... elephant seals breeding on the South Atlantic Island of South Georgia, led scientists at the British ... extensive horizontal track, it was carried out at a single depth, which reduced the number of potential ... , usually seen in the vicinity of South Georgia. The absence of any other strong echoes during the haul at ... characterise the echosignals of any squid caught in a pelagic net. The pelagic trawl, towed at between three ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 259–271 : Author(s): Goss, C., P. Rodhouse, J.L. Watkins and A.S. Brierley
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Status of krill target strength
Paper Title: Status of krill target strength Abstract / Description: Empirical estimates for the ... target strength of krill are extracted from publications. These are confined to measurements on ... aggregations of live euphausiids and should not be affected by a frequent cause of bias in single-animal ... -cylinder scattering model assuming specific sets of physical and orientational parameters, for which there ... , measurements of kriU target strength have been quite scarce. In fact, at the time of the Post-FIBEX Acoustic ... expressed in SI units. The TS of an idealised, perfectly reflecting sphere of 2 m radius at very high ... were in a large concentration just north of South Georgia at the time of measurement in March 1980 ... ) specifies two TS numbers: -81.3 dB in the daytime and -89.2 dB at night-time. Tabulation of Sv values ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 101–126 : Author(s): Foote, K.G., D. Chu and T.K. Stanton
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CPUE indices used in Soviet krill fishery statistics from 1977 to 1992 and their possible utility for evaluation of relative changes in krill biomass
possible utility for evaluation of relative changes in krill biomass Abstract / Description: Key catch-per ... -unit-effort (CPUE) indices used in Soviet krill fishery statistics, as well as the main sources of data ... -days fished (CVDF), catch per extended vessel-days fished (CEVDF) and catch per hour of trawling (CHT ... ). A relatively high correlation between mean monthly values of CVDF and CEVDF, and CVDF and CHT was ... ) (Figure 2). The CC between the mean monthly values of CVDF and CHT was relatively high, at 0.768586 ... processing krill for other types of product aimed only at maximising catches. (ii) Vessels producing ... iv e of th e w ho le d at as et a cc or d in g to th e R IF s ta ti st ic s ... rn a nd e as te rn ) of k ri ll fl ee t co nc en tr at io n (‘ ba si c fi sh in ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 165–177 : Author(s): Litvinov, F.F., A.Z. Sundakov and V.I. Arkhipov
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Myctophids in the diet of Antarctic predators
Paper Title: Myctophids in the diet of Antarctic predators Abstract / Description: The aim of ... the present study is to review published data on the diet of various top predators (birds, seals ... , whales, fish and squids) in order to help evaluate the importance of myctophids in their diets. This ... contained some information on the myctophid component of the diet of Antarctic predators. Myctophids were ... 3.3 to 8.4% by weight ofmyctophids. Fish comprised at about 75% (73.3 to 77.9%) of its diet. The ... to distinguish. All these species of myctophids have circumpolar distribution at least in the APF ... Island, but this might reflect differences in the timing and duration of field studies. Observations at ... conducted in November/December when E. carlsbergi is absent in the diet of king penguins at two other ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 335–368 : Author(s): Sabourenkov, E.
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Results of a longline survey on seamounts in the southeast Atlantic and in Subarea 48.6 and Division 58.4.4
Paper Title: Results of a longline survey on seamounts in the southeast Atlantic and in Subarea ... October and 1 December 1997, and several seamounts were surveyed to the south of Africa: close to the ... of Bouvet Island, Ob and Lena Banks). Samples were collected from longlines set perpendicularly to ... toothfish (Dissostichus eleginoides), with 2 822 individuals caught (83% of total catch). Grenadiers of the ... m. The number of longline sets at each seamount was determined by seabed topography, and at least ... two sections of the slope around each seamount were sampled. Longlines were set at night, and soak ... -Smirnov test for large samples. The critical values were obtained at the 0.05 level of significance ... catches of D. eleginoides and Macrourus spp. At the same time, differences were observed in the density ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 99–116 : Author(s): López Abellán, L.J. and J.F. González Jiménez
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Performance and geometry of the FP-120 trawl used during UK fish stock assessment surveys around South Georgia, Subarea 48.3
Paper Title: Performance and geometry of the FP-120 trawl used during UK fish stock assessment ... opening (and, thus, swept area) of a bottom trawl are discussed. In situ measurements of the FP-120 trawl ... presented. Regression equations for the estimation of horizontal opening from other, more easily measured ... around South Georgia are estimated using a new regression equation. The results of this calculation are ... , swept area S can be estimated at the ith location by: start and end of each tow using a Furuno GPS ... mounted at the midpoint of the headline. Additional floats were attached to counteract the negative ... fixing of the Scanmar sensors on the FP-120. Pilling and Parkes The sensors were deployed at 29 of ... measurements of the horizontal opening resulted. The mountings of the sensors were checked at the end of each ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 51–69 : Author(s): Pilling, G. and G. Parkes
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Effect of line sink rate on albatross mortality in the Patagonian toothfish longline fishery
Paper Title: Effect of line sink rate on albatross mortality in the Patagonian toothfish longline ... vessels to derive a sink rate and line-weighting regime that would minimise the capture of albatrosses ... based on knowledge of line sink rates and albatross diving abilities. Sink rates of lines deployed into ... propeller turbulence, which tended to keep lines aloft, varied as a function of distance between line ... results of experiments are to be meaningful. This is particularly so in the case of experiments aimed at ... a line length on the seabed of about 13 km (depending on slack in the line). The line was set at ... at 5.5-6.5 knots and bait shooting rate, which varies as a function of setting speed and snood ... within 70 m of weights attached to the mother line at 1 600 m intervals. Branch lines were 18 m in ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 133–150 : Author(s): Robertson, G.G
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Investigations of required sampling regimes for environmental parameters
Paper Title: Investigations of required sampling regimes for environmental parameters Abstract ... / Description: The sensitivity of different sampling regimes in identifying inter-annual changes in ... monthly mean temperature over two years with a significance α of 0.05 and a power P of 0.8. Sampling wind ... monthly mean log-transformed wind speed α of 0.05 and P of 0.9. File: 35-Agnew.pdf ... of the required sample size such that a certain level of change would be detectable at a ... significance level of a and at a power of P. The method of Sokal and Rohlf (1981) was used along the ... . The occurrence of cyclic phenomena at Davis Station, including the suspected occurrence of cycles in ... temperature change of ±2°C in December and January could be reliably detected at Davis Station, but that in ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 561–573 : Author(s): Agnew, D.J.
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Research currently being undertaken by the Republic of South Africa on "dependent and related species" within the Antarctic marine ecosystem
!i'.ated on t.E'111Perate Gou~h Island in the South Atlantic Ocean .;.nd on the -::;ub-Antarctic Prince ... :32. Ad,jitional inform.at ion wa5 collected bY members of the in 1873. No further ornithological ... nactur11al I~, are now beins' studied, The results to date ~;how th.at birds ~;i9nificantl!::1 affect ... Probabl!.1 aPProxi- 111at!o'S that of either seals or wholfJS. Si nc:e the f'I' i nee E:,jwal'd ... Paper Title: Research currently being undertaken by the Republic of South Africa on " ... components of the biological sciences programme are described. The primary objective of the studies being ... undertaken is to improve our understanding of the ecology of important predators (especially seals and ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/2 (Selected Scientific Papers, SC-CAMLR-SSP/2) : 59-77 : Author(s): South Africa