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1. Abundance, size and maturity of krill (Euphausia superba) in the krill fishing ground of Subarea 48.1 during the 1990/91 austral summer

   for the total biomass. 3.2.4 Spatial Distribution of Lengths and Maturity Stages ofKrill The krill stock ... % decline in the number of penguins occupying nests compared to last season, and longer feeding trips ... Paper Title:  Abundance, size and maturity of krill (Euphausia superba) in the krill fishing ... ground of Subarea 48.1 during the 1990/91 austral summer Abstract / Description:  Acoustic and net ... sampling surveys for krill were conducted in the krill fishing ground north of the South Shetland Islands ... of krill were observed. The survey area was divided into four zones: oceanic, slope frontal, neritic ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 183–199 : Author(s): Ichii, T., H. Ishii and M. Naganobu

2. Analysis of variability of krill size and fish by-catch in the Japanese krill fishery based on scientific observer data

   for the observer because scientific observers are requested to collect various types of data within a limited ... for a study that requests scientific data through on-board observer programs, it may not be possible ... Paper Title:  Analysis of variability of krill size and fish by-catch in the Japanese krill ... size of scientific observer data collected on Antarctic krill commercial fishing vessels, the ... Bayesian model. The models were composed of multistage cluster units (i.e. year, subarea, vessel, cruise ... variability in the size structure of the krill population, which is presumably derived from large variability ...

   Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 31–47 : Author(s): Okuda, T. and M. Kiyota

3. Observations of fishing operations on a krill trawler and distributional behaviour of krill off Wilkes Land during the 1985/86 season

   to be little hope in the quality and quantity improvement any more in this area. And the company requested ... Ha nepl10A BpeMeHI1, K:Of'Aa 'IaCTO BCTpe'IaJII1Cb rrOBepXHOCTHhle CK:OrrJIeHI1R. YJIOB 3a ... 'IeCTBO oCo6ew )KeHCK:Of'O rrOJIa (CM. TeK:CT). PaHOH 0 nOK:a3aH Ha PI1CYHK:e A-4. fl1CTOf'paMMbI ... Paper Title:  Observations of fishing operations on a krill trawler and distributional behaviour ... of krill off Wilkes Land during the 1985/86 season Abstract / Description:  Japanese krill fishing ... of fished swarms ranged from 100 m to 10 km with different distributions occurring in different ... a good index to measure abundance of a concentration. Comparison of such an index across time and ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 335-368 : Author(s): Ichii, T.

4. Long-term monitoring of krill recruitment and abundance indices in the Elephant Island area (Antarctic Peninsula)

   0.0917 0.0340 0.0339 0.1950 0.0125 0.0390 0.0999 0.0596 0.0619 0-0368 0.0390 0.0141 ... Paper Title:  Long-term monitoring of krill recruitment and abundance indices in the Elephant ... for the Elephant Island area with regard to the representativeness of the study area (60°-62 o 30´S ... interannual variability of krill recruitment is confirmed by the present analysis. Results are compared for ... an analysis of variance. File:  02siegel-etal.pdf ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 19–35 : Author(s): Siegel, V., W. de la Mare and V. Loeb

5. A generalised model for evaluating yield and the long-term status of fish stocks under conditions of uncertainty

   Paper Title:  A generalised model for evaluating yield and the long-term status of fish stocks ... under conditions of uncertainty Abstract / Description:  This paper presents a general fish stock ... projection model for assessing the long-term annual yield which satisfies objectives for the maintenance of ... period and set a further constraint on the long-term status of the stock relative to the pre-exploitation ... up the number of fish in each age class at the start of the simulation period. Each age class is ... and spawning stock is calculated for each age class during the projection. At the completion of the ... fish in age class a at time of year t in year y. The term M.m(a + t ) gives the rate of natural ... mortality which applies to age class a at time of year t . M is the average rate of natural mortality ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 31–54 : Author(s): Constable, A. and W.K. de la Mare

6. Notes on the use of virtual population analysis for stock assessment of the mackerel icefish, Champsocephalus gunnari (Lönnberg, 1906) in Subarea 48.3 for the 1990/91 and 1991/92 seasons

   Paper Title:  Notes on the use of virtual population analysis for stock assessment of the mackerel ... Abstract / Description:  Following on from the apparent failure of the CCAMLR Working Group on Fish Stock ... Assessment (WG-FSA) to satisfactorily assess in 1991 the status of the Champsocephalus gunnari population in ... -class (1 year olds in 1988), was quite robust, despite the use of various combinations of survey and ... to differences in the use of tuning data. Two VPA runs were made at WG-FSA-91, using the Laurec ... and performed at WG-FSA-91 provided a misleading representation of the current structure of the C ... of the VPA runs made at WG-FSA-91. Forwards projections to 1991/92 were made in an attempt to ... 'birthday' at the start of the split-year and the time of the survey used in Parkes (1991) (equation 1) was ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 49–79 : Author(s): Parkes, G.

7. The influence of bait quality on the sink rate of bait used in the Japanese longline tuna fishing industry: an experimental approach

   Paper Title:  The influence of bait quality on the sink rate of bait used in the Japanese longline ... determine the effects of bait size (large versus small) and bait condition (frozen versus thawed) on the ... sink rate of five species of bait used in the Japanese longline tuna fishery in Tasmanian waters. The ... effect of adding lead sinkers to baited hooks was also examined. While all factors (bait species, size ... of the swim bladders of fish, and was not known at the time of the experiments. To remove the ... hook is placed in a bait, the angle at which the shank of the hook protrudes from the fish, and the ... without standard deviation for the sake of simplicity. specimens of thawed aji-l (both sizes) sank at ... suppliers and may have been caught at different locations and/or at different times of the year. Some ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 123–129 : Author(s): Brothers, N., A. Foster and G. Robertson

8. Validation of sink rates of longlines measured using two different methods

   Paper Title:  Validation of sink rates of longlines measured using two different methods Abstract ... / Description:  Sink rates of integrated weight longlines (lines with 50 g.m –1 lead integrated into two strands ... of the ground line – IW-50 lines) were measured during commercial fishing operations using two ... methods: electronic time depth recorders (TDRs) and pieces of string of known length wrapped around empty ... on the sink rates caused by the anchors at either end of the lines. When lines were set during the ... the internal temperature sensors of the TDRs and kept them at the same temperature as the seawater ... a measure of how a sinking longline behaved in the propeller-wash zone near the surface and at ... pressure transducer communications port 183 Validation of longline sink rates The time at which the ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 179–187 : Author(s): Wienecke, B. and G. Robertson

9. Simulation of recovery rates of fish stocks in the South Georgia and Kerguelen Islands areas

   Paper Title:  Simulation of recovery rates of fish stocks in the South Georgia and Kerguelen ... Islands areas Abstract / Description:  The benefits of conservation measures are generally based on the ... rebuilding of the depleted stocks and improvement in yields. It is desirable that such measures be based on ... the expected rate of recovery relative to rates of fishing. A simulation model based on a ... group also estimated that the stock could be expected to increase at an approximate rate of 30% per ... presents projections of the stocks and catch over the next 20 years for the major species of concern at ... over time, at least relative to the effects of recruitment. With these fixed parameters, the ... caught. The estimated fishing mortality at age was rather variable from year to year. The age of first ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 229-298 : Author(s): Hennemuth, R.C., K.D. Bisack and G. Duhamel

10. Possible effects of different levels of krill fishing on predators – some initial modelling attempts

    Paper Title:  Possible effects of different levels of krill fishing on predators – some initial ... suggested by the Joint Meeting of CCAMLR's Working Group on Krill (WG-Krill) and Working Group for the ... CCAMLR Ecosystem Monitoring Program (WG-CEMP) in 1992, in order to investigate the possible effects of ... krill fishing on krill predators. First, estimates are made of the parameters of predator survival rates ... . one realised after any transient effects from the commencement of fishing at an intensity y have ... widening. The survival rates and breeding success of krill predators must depend, to some extent at ... least, on the level of krill biomass. Both will tend to be good at high biomass levels, and poor at ... for some of the parameters. To render the effects at work in the analysis of this paper more ...

    Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 79–97 : Author(s): Butterworth, D.S. and R.B. Thomson

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