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1. Catch-at-age analysis applied to new fisheries: the case of Dissostichus eleginoides

   for the Dissostichus eZeginoides fishery south of Chile, where a new fishery is beginning, with objectives similar ... - tr + ~», Fi = ri F where Ci = catch at age i during survey Ni = numbers at the beginning ... between the beginning of the year and the beginning of the research survey ... be calculated in the usual way, by performing the following • projecting stock size at the beginning ... Paper Title:  Catch-at-age analysis applied to new fisheries: the case of Dissostichus eleginoides ... Abstract / Description:  Traditionally, the approach used in the assessment of new fisheries has been based ... on research surveys, making it possible to estimate the standing stock and potential yield of a ... resource by coarse methods. The main aim of such surveys is to monitor fishing operations in order to ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 3–9 : Author(s): Zuleta, A.V. and C.A. Moreno

2. The use of predator-derived krill length-frequency distributions to calculate krill target strength

   of this technique will enable us to collect additional estimates of krill abundance at the beginning and end ... of Antarctic fur seals (TSpred) after the application of a correction factor based on the proportion of krill ... et al. (1988). After measuring krill in a sample to the nearest millimetre, the mean TS ... at either end of the austral summer, in addition to the normal annual assessment in January, it may ... Paper Title:  The use of predator-derived krill length-frequency distributions to calculate krill ... target strength Abstract / Description:  The relationship between krill abundance and predator ... krill sampled from the diet of predators to provide a length-frequency distribution of krill at times ... calculated from acoustic data. Changes in the lengthfrequency distribution of krill over a period of a few ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 155–163 : Author(s): Reid, K. and A.S. Brierley

3. New data on spawning, hatching and growth of Champsocephalus gunnari on the shelf of the Kerguelen Islands

   the beginning (spring 1989/90: 8 to 18 cm) to the end of the s tudy period, when it almost attains ... ) is common at the end of autumn. Post-spawning fish (stage 5) were recorded in the summer sample of January ... 1992 (37 of the 194 specimens analysed, size range: 25 to 35 cm). At the end of June 1994, fish from ... of the 295 specimens analysed); November 1992, size range 30 to 37 cm, n = 23 of late Oct 1989 13.19 end ... Paper Title:  New data on spawning, hatching and growth of Champsocephalus gunnari on the shelf of ... the Kerguelen Islands Abstract / Description:  Combined studies on the inner and outer northeastern ... part of the Kerguelen shelf during the 1989/90 to 1993/94 period provide new information on the stock ... the inner shelf has enabled a new cohort of fish to be identified each year. However, annual ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 21–34 : Author(s): Duhamel, G

4. An index of per capita recruitment

   in recruits per spawner after a 20% random sampling error was added to the value of R 1 used ... relationship between spawners and recruits. PCR was also able to track cycles in recruits per spawner after ... relationship between spawners and recruits. PCR was also able to track cycles in recruits per spawner after ... in recruits per spawner even after the introduction of random variability in mortality and the proportion ...

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

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

   sample taken from the mouth of the net and the other from the end of net. After the comparison ... immediately after detecting low density krill to find her way into density areas. 2.4 Detection of Swarms ... . When swarms were small and scattered (generally in the beginning of the season), sonar ... after sunset, were difficult to detect by sighting. Another vessel which had crews experienced ... of krill off Wilkes Land during the 1985/86 season Abstract / Description:  Japanese krill fishing ... operations were observed on board a commercial vessel and the actual operation described in detail. ‘Fish ... -finder’ was most useful in detecting swarms, while sonar was used to judge the towing direction. The size ...

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

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

   January it reaches its highest levels which last until the beginning of March. Interestingly, the krill ... 1990) and after (26 March 1991) the cruise. Two calibration experiments showed little reduction ... was measured to the nearest millimetre from the tip of the rostrum to the end of the telson. All measurements ... be regarded not as an underestimation but as a true reflection of lower biomass at the end of January ... 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

7. Integration of CPUE data into assessments using the Generalised Yield Model

   . Recruitme~~ts in future years and in determining the age composition of the population at the beginning ... - dence limits of the annual standardised CPUEs (after rescaling). In an example based on the 1998 ... is described in the next section, after which a series of goodness-of-fit diagnostics are suggested ... is two-sided, with departures at either end simulation n should be proportional to indicating a failure ... Paper Title:  Integration of CPUE data into assessments using the Generalised Yield Model Abstract ... / Description:  For the last three years, CCAMLR's Working Group on Fish Stock Assessment (WG-FSA) has ... accorded high priority to the development of methods of integrating different indicators of stock status ... into assessments using the Generalised Yield Model (GYM). In this paper, we propose a method, based on ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 65–74 : Author(s): Kirkwood, G.P. and A.J. Constable

8. Estimation of natural mortality using catch-at-age and aged mark-recapture data: a multi-cohort simulation study comparing estimation for a model based on the Baranov equations versus a new mortality equation.

   . Simulations which passed catch-at-age numbers to the estimation algorithm after perturbation by observational ... numbers to the estimation algorithm after perturbation by observational error were also carried out ... . Simulations which passed catch-at-age numbers to the estimation algorithm after perturbation by observational ... be inferred from esti- mated changes in population numbers-at-age after accounting for age- and year-specific ... t A t . Since recruitment to age-class 1 obviously con- tinues once fishing begins, then additional YCS ... is developed first for the num- ber of recaptures. Representing end of each year by { }0 01,...,= + + fy ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 1–27 : Author(s): Candy, S.G.

9. Distribution and size of Antarctic krill (Euphausia superba Dana) in Polish commercial catches taken in the Atlantic sector of the Southern Ocean from 1997 to 1999

   of the beginning and the end of each trawling were used in order to determine the dura- tion of each haul ... . The beginning of trawling was the time at which shooting was completed and the net began to fi sh. The end ... since the beginning of commercial exploitation. However, most of these studies have been short term ... reference table (CCAMLR, 2001b). All hauls completed before or up to 10 min after dawn or dusk were ... commercial catches taken in the Atlantic sector of the Southern Ocean from 1997 to 1999 Abstract ... / Description:  The distribution and internal structure of commercial krill concentrations were investigated in ... the areas of the South Shetland, Elephant, South Georgia and South Orkney Islands in the spring and ... summer from 1997 to 1999. The density of concentrations varied with area and season. The densest ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 83–105 : Author(s): Jackowski, E

10. Effect of line sink rate on albatross mortality in the Patagonian toothfish longline fishery

    -and-hook bearing 11.5 mm mother line with each end attached to 100 kg anchors, which were used to sink ... the line quickly to target locations and to minimise line drag in currents. About 50 m separated the end ... beacon and a flag: these marked each end of the anchor line and were used to locate the fishing gear ... fishing location) and held the ends of the line on the seabed against the force of the current ... 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 ... /s should greatly reduce the incidental take of albatrosses. For autoline vessels with gear and line ... -setting characteristics similar to the experimental vessel, this sink rate should be achievable with 4 kg ...

    Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 133–150 : Author(s): Robertson, G.G

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