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

   into assessments using the Generalised Yield Model (GYM). In this paper, we propose a method, based on ... the use of importance sampling, for incorporating information on trends in standardised CPUEs into GYM ... eleginoides) in Subarea 48.3. The method requires only very small adjustments to the computer program ... assessments using the Generalised Yield Model (GYM). In this paper, w e propose a method, based on the use ... (Dissosticl?~ls eleginoldes) in Subarea 48.3. The method requires only very small adjustments t o the ... Patagonian toothfish (Dissosticlzt~s eleginoides) in Subarea 48.3, but it is not yet possible to make ... direct assessments of the abundance of fish in the population (SC-CAMLR, 1995). The first of these ...

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

2. A von Bertalanffy growth model for toothfish at Heard Island fitted to length-at-age data and compared to observed growth from mark–recapture studies

   frequencies were also included in defining relative probabilities, the VP maximum likelihood (MLPLB) and IWLS ... measured at release and first recapture in mark–recapture studies were compared where predictions used the ... developed and showed that the bias is relatively small for the range of release lengths in the data ... , the mean trend in observed AGR values with release length compared with those obtained using IWLS ... . When length- bin sampling frequencies were also included in defi ning relative probabilities, the VP ... annual growth rate (AGR) for lengths measured at release and fi rst recapture in mark–recapture studies ... the range of release lengths in the data. Predictions of AGR using the MLPLB-estimated VB parameters ... were closer to, but still substantially higher than, the mean trend in observed AGR values with ...

   Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 43–66 : Autor(es): Candy, S.G., A.J. Constable, T. Lamb and R. Williams

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

   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 ... of fished swarms ranged from 100 m to 10 km with different distributions occurring in different ... commercial vessel and the actual operation described in detail. "Fish-finder" was mose useful in detecting ... to 10 km with different distributions occurring in different fishing areas. While catch per towing ... per unit effort) data as an index of krill abundance is now under investigation in the "Krill ... . Information utilized in this report was collected on board Zuiyo Maru No. 2 (3 023 tons, Hakodate Kokai ...

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

4. Do krill and salps compete? Contrary evidence from the krill fisheries

   krill in the catches was evident when both salps and krill were taken together. In the Livingston Island ... clear relationship was observed in the Elephant Island area. Possible reasons for these phenomena are ... green krill were analysed. No relationship between salp density and the proportion of green krill in ... the catches was evident when both salps and krill were taken together. In the Livingston Island area ... relationship was observed in the Elephant Island area. Possible reasons for these phenomena are discussed ... limited in terms of continuity through the season. Krill trawlers are unable to cover wide areas, but ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 205–216 : Autor(es): Kawaguchi, S., T. Ichii, M. Naganobu and W.K. de la Mare

5. Methodological guidelines on the assessment of trawl catchability of krill by means of statistical modelling

   method, which is described in the works by Metropolis, N., Ulam, S. (1949) and Sobol, I.M. (1978), is ... assessment of complex stochastic systems, including the assessment of the effectiveness of trawl nets used in ... of various configurations. The algorithm for solving this problem is constructed in such a way that ... equations and two double inequalities). The proposed algorithm can be realised by computer in algorithmic ... in the works by Metropolis, N., Ulam, S. (1949) and Sobol, I. M. (1978), is used as a basis. The ... stochastic systems, including the assessment of the effectiveness of trawl nets used in krill fishing ... configurations. The algorithm for solving this problem is constructed in such a way that it can be applied ... two double inequalities). The proposed algorithm can be realised by computer in algorithmic ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 195-222 : Autor(es): Kizner, Z.I.

6. Age and growth of spiny icefish (Chaenodraco wilsoni Regan, 1914) off Joinville–D’Urville Islands (Antarctic Peninsula)

   Islands (Antarctic Peninsula) in February–March 2006 and January 2007. A total of 218 specimens were ... annuli on transverse sections obtained by grinding and polishing whole otoliths embedded in epoxy resin ... in moulds. The precision of age estimates between readings was tested applying both the average ... , although it had a much shorter life span. The part of the population of C. wilsoni caught in the study area ... research surveys by benthic trawl carried out off Joinville–D’Urville Islands (Antarctic Peninsula) in ... obtained by grinding and polishing whole otoliths embedded in epoxy resin in moulds. The precision of age ... population of C. wilsoni caught in the study area consisted mainly of adult individuals between 1 and 3 ... Antarctic Peninsula (CCAMLR Statistical Subarea 48.1) in the western Atlantic Ocean sector of the Southern ...

   Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 115–130 : Autor(es): La Mesa, M., A. De Felice, C.D. Jones, K.-H. Kock

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

   commercial concentrations of C. gunnari in years of high abundance of the species (1982/83, 1983/84 and 1986 ... considered in the paper. A distinct pattern of daily vertical migrations of C. gunnari was observed on the ... South Georgia shelf. During the day, fish concentrate near the bottom in concentrations 5 to 7 m thick ... may be used for clarification of survey techniques used in stock assessment. For a number of years ... data from research vessels which had been fishing for commercial concentrations of C. gunnari in ... . gunnari as well as from observations on fish feeding is also considered in the paper. A distinct pattern ... , fish concentrate near the bottom in concentrations 5 to 7 m thick. At night, fish disperse and migrate ... used in stock assessment. For a number of years scientists of AtlantNIRO have been conducting trawl ...

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

8. Small scale krill surveys: simulations based on observed euphausiid distributions

   aggregations. Calculations based on the power of surveys to reliably detect changes in mean density indicate ... be required to detect changes of 40% in the mean if CVs are as high as those obtained in the ... on the power of surveys to reliably detect changes in mean density indicate that with probability ... detect changes of 40% in the mean if CVs are as high as those obtained in the simulations. Resume ... SIBEX krill biomass surveys various systems of survey design and analysis were considered in order to ... contour lines in krill abundance, and this meant across the mean direction of ocean currents. Some of the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 245–256 : Autor(es): Agnew, D.J. and S. Nicol

9. An assessment of the mackerel icefish (Champsocephalus gunnari) off Heard Island

   conducted in 1990, 1992, 1993 and 1997. The assessments include estimates of all the parameters required ... of 900 tonnes in the 1997/98 season and 600 tonnes in 1998/99. File:  06delamare-etal.pdf ... are developed from the results of four scientific surveys conducted in 1990,1992,1993 and 1997. The ... fishing season would allow for a catch limit on the Heard Plateau of 900 tonnes in the 1997/98 season and ... 600 tonnes in 1998/99. Resume De quatre campagnes d'evaluation menees en 1990, 1992, 1993 et 1997 ... , Champsocephalus gtlnnari, abundance, potential yield, Heard Island, CCAMLR INTRODUCTION In 1994 the Working ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 79–101 : Autor(es): de la Mare, W.K., R. Williams and A.J. Constable

10. Age estimation and maturity of the ridge-scaled macrourid (Macrourus whitsoni) from the Ross Sea

    Islands in 2004. Intensive analysis of otoliths from these specimens greatly increased confidence in the ... interpretation of otolith growth zone structure, supporting the otolith interpretation protocol used in previous ... BioRoss survey of the western Ross Sea and Balleny Islands in 2004. Intensive analysis of otoliths from ... these specimens greatly increased confidence in the interpretation of otolith growth zone structure ... , supporting the otolith interpretation protocol used in previous work on this species. Von Bertalanffy growth ... spp.) in the waters in and near the Ross Sea, Antarctica, has operated each year since 1998 (Hanchet ...

    Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 291–303 : Autor(es): Marriott, P.M., M.J. Manning and P.L. Horn

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