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1. Acoustic estimates of krill biomass in the Elephant Island area: 1981–1993

   adjusted to correct for the losses, an impedance mismatch between the transceiver and the transmission ... Paper Title:  Acoustic estimates of krill biomass in the Elephant Island area: 1981–1993 Abstract ... / Description:  Acoustic estimates of krill biomass in the vicinity of Elephant Island are presented for the ... years 1981 to 1993 (with the exception of 1982 and 1986). Estimates for 1981 to 1991 are based on ... previous reports adjusted for the recently proposed definition of krill target strength (Greene et al ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 1–5 : Author(s): Hewitt, R.P. and D.A. Demer

2. Results of fish stock assessment survey, South Georgia region, November - December 1986

   ° W 36° W 35° W Fi gure 7. Di stri buti on of ca tch per tow, ~lototheni a squamifrons, South Georg ... . 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.

3. Calibration of an acoustic echo-integration system in a deep tank, with system gain comparisons over standard sphere material, water temperature and time

   and salinity should be measured to correct for absorption losses. The standard target must be held stable ... of temperature, standard sphere and time, is 2.1 dB, i.e., 0.8 dB less than the total range ofTS gain ... Paper Title:  Calibration of an acoustic echo-integration system in a deep tank, with system gain ... sphere. It presents the results of an extensive calibration of a Simrad EK500 scientific echosounder with ... gain, including the effects of temperature, standard sphere and time, is 2.9 dB. Gain values calibrated ... with the Cu sphere are, with the exception of the long pulse length, lower than those from the WC ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 127–144 : Author(s): Demer, D.A. and R.P. Hewitt

4. CPUE indices used in Soviet krill fishery statistics from 1977 to 1992 and their possible utility for evaluation of relative changes in krill biomass

   % of the krill were dam- aged and losses of the raw krill material could be 20% or more (Anon., 2001). Another ... 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 ...

   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

5. An integrated stock assessment for the Patagonian toothfish (Dissostichus eleginoides) for the Heard and McDonald Islands using CASAL

   , estimation of tag- loss rates for dart tags, and improved estimates of the number of fish scanned for tags ... Division 58.5.2), using CASAL and data consisting of multi-year random stratified trawl survey (RSTS ... representative of the main plateau, where juvenile fish are found, but are of relatively low intensity in effort ... , consisting of three main grounds. The model implemented in CASAL is a simple, single-sex, single-area ... functions for each ground by gear (trawl and longline) combination. Various combinations of dataset ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 1–34 : Author(s): Candy, S.G and A.J. Constable

6. An index of per capita recruitment

   Paper Title:  An index of per capita recruitment Abstract / Description:  An index of per capita ... recruitment (PCR) is proposed such that where R 1 is the proportion of age-l animals sampled in year y and M ... is the post-recruit mortality rate. The intent of the index is to facilitate investigation of ... reproductive success and the factors postulated to affect it. The formulation of PCR is based on the ... AN INDEX OF PER CAPITA RECRUITMENT R. Hewitt Southwest Fisheries Science Center PO Box 271, La ... Jolla, Ca. 92038, USA Abstract An index of per capita recruitment (PCR) is proposed such that ... where R1 is the proportion of age-l animals sampled in year y and M is the post-recruit mortality rate ... . The intent of the index is to facilitate investigation of reproductive success and the factors ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 179–196 : Author(s): Hewitt, R

7. Assessments of by-catch in trawl fisheries at Heard and McDonald Islands

   Paper Title:  Assessments of by-catch in trawl fisheries at Heard and McDonald Islands Abstract ... (Statistical Division 58.5.2) to significantly affect, in the long term, spawning biomass of three taxa caught ... skates). The long-term annual yield for each of the three taxa was estimated using the generalised yield ... biomass estimates from surveys in the region from 1990 to 1993 and a limited amount of biological data ... ASSESSMENTS OF BY-CATCH IN TRAWL FISHERIES AT HEARD AND MCDONALD ISLANDS A.J. Constable, R. Williams and ... (Statistical Division 58.5.2) to significantly affect, in the long term, spawning biomass of three taxa caught ... skates). The long-term annual yield for each of the three taxa was estimated using the generalised yield ... biomass estimates from surveys in the region from 1990 to 1993 and a limited amount of biological data ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 231–243 : Author(s): Constable, A.J., R. Williams and W.K. de la Mare

8. Towards the development of a management plan for mackerel icefish (Champsocephalus gunnari) in Subarea 48.3

   Paper Title:  Towards the development of a management plan for mackerel icefish (Champsocephalus ... gunnari) in Subarea 48.3 Abstract / Description:  Management of the mackerel icefish (Champsocephalus ... gunnari) at South Georgia is complicated by the likelihood of substantial periodic variations in natural ... mortality rates. These may be associated with increased consumption of C. gunnari by Antarctic fur seals in ... DEVELOPMENT OF A MANAGEMENT PLAN FOR THE MACKEREL ICEFISH (CHAMPSOCEPHALUS GUNNARI) IN SUBAREA 48.3 D.J ... Tampa, Fl. 33609-3437, USA Abstract Management of the mackerel icefish (Champsocephnlus gunnari) at ... South Georgia is complicated by the likelihood of substantial periodic variations in natural mortality ... rates. These may be associated with increased consumption of C. gunnari by Antarctic fur seals in years ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 63–77 : Author(s): Agnew, D.J., I. Everson, G.P. Kirkwood and G.B. Parkes

9. Vertical migrations of mackerel icefish (Champsocephalus gunnari) on the South Georgia shelf

   Paper Title:  Vertical migrations of mackerel icefish (Champsocephalus gunnari) on the South ... Georgia shelf Abstract / Description:  High values of coefficient of variation resulting from the ... calculation of mackerel icefish biomass (Champsocephalus gunnari) from trawl survey data on the South Georgia ... clarification of the techniques used. The objective of the present study is to analyse data on daily vertical ... WG-FSA-91/6 VERTICAL MIGRATIONS OF MACKEREL ICEFISH ... values of coefficient of variation resulting from the calculation of mackerel icefish biomass ... rationale for round-the-clock trawling and call for clarification of the techniques used. The objective of ... the present study is to analyse data on daily vertical migrations of mackerel icefish. The study used ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 3–14 : Author(s): Frolkina, J.A. and V.I. Shlibanov

10. Indices of prey availability near the Seal Island CEMP site: 1990 to 1996

    Paper Title:  Indices of prey availability near the Seal Island CEMP site: 1990 to 1996 Abstract ... / Description:  Four indices of prey availability are calculated from surveys conducted in the vicinity of the ... Seal Island CEMP site during the austral summers of 1990 to 1996. The indices are measures of average ... surveys each year were subsampled to include the foraging range of predators breeding at Seal Island ... CCAMLR Science, Vol. 4 (1997): 37-45 INDICES OF PREY ... Fisheries Science Center PO Box 271, La Jolla CA 92038, USA Abstract Four indices of prey ... availability are calculated from surveys conducted in the vicinity of the Seal Island CEMP site during the ... austral summers of 1990 to 1996. The indices are measures of average prey density, depth, distance from ...

    Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 37–45 : Author(s): Hewitt, R.P., G. Watters and D.A. Demer

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