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1. Note on estimating krill abundance from acoustic data on individual aggregations

   Abstract / Description:  The fundamental equations and assumptions underlying estimation of krill abundance ... using echo-integration information and aggregation parameters are briefly described. The chief ... differences of the two approaches are highlighted. It is concluded that the echo-integration approach is ... superior for the estimation of regional krill abundance and its variance since it is easier to apply ... ) involves the handling of much smaller volumes of data; (c) requires no assumptions regarding aggregation ... ACOUSTIC DATA ON INDIVIDUAL AGGREGATIONS I. Hampton and D.G.M. Miller* Abstract The fundamental ... aggregation parameters are briefly described. The chief differences of the two approaches are highlighted ... . It is concluded that the echo-integration approach is superior for the estimation of regional kriU ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 219–223 : Autor(es): Hampton, I. and D.G.M. Miller

2. Beyond MSY: a consideration of definitions of management objectives

   / Description:  The concept of ‘Maximum Sustainable Yield’ (MSY) has provided a useful guideline for resource ... management under the assumptions of a simple population model and simple objectives. This paper explores ... different guidelines under more realistic population models, taking account of the objectives set out in ... Article II of the CCAMLR Convention. The criteria will depend on whether the main concern is with ... , because there is no longer a simple one to one relation between the amount of fishing and population ... particular objectives. The general uncertainties surrounding the other Antarctic stocks are certainly no ... decision tree. 1. Is the spawning stock below the safety level? Yes; close the fishery. No; go to 2 ... . 2. Is the value of F in the next season likely to reach the target F if no measures are applied ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 299-322 : Autor(es): Gulland, J.A.

3. Protecting young fish and spawning aggregations of Champsocephalus gunnari in Subarea 48.3 (South Georgia): a review

   Subarea 48.3 (South Georgia): a review Abstract / Description:  The need to protect young fish and ... spawning aggregations in fisheries generally, and specifically in the Champsocephalus gunnari fishery in ... Subarea 48.3, is reviewed. Mechanisms available to achieve these objectives are discussed, including the ... measures put in place by CCAMLR to date. These measures are re-examined in the light of new information ... approximately with the start of the spawning season, and there is no evidence of a time of year when a closed ... , b u t the Commit tee w a s no t i n a position at its 1999 meet ing t o provide unequivocal ... . gzuznnri benefit in restoring depleted stocks through the protection of juvenile fish. There was no ... Conservation Measure 1/III had no fixed lifespan, it has not been in force since the 1989/90 season (see ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 75–86 : Autor(es): Parkes, G.B

4. Composition and characteristics of ichthyofauna in pelagic waters of South Georgia (Subarea 48.3)

   (Subarea 48.3) Abstract / Description:  This paper presents the results of randomly stratified pelagic ... studying the vertical migrations of some of the most abundant species were carried out during the six ... pelagic surveys. Horizontal distribution and length composition of fish, as well as the comparative ... distribution of krill and juvenile Champsocephalus gunnari were studied. The pelagic component of the ... hours virtually no juvenile fish were pelagic hauls. Most fish were in the range of caught in pelagic ... various depths during the day and at night: A - BMRT Gizhiga (No. 1: 6-7 June 1986; No. 2: 24-26 June ... ) 5 Dmitry Donskoy St. Kaliningrad 236000, Russia Abstract This paper presents the results of ... sampling stations aimed at studying the vertical migrations of some of the most abundant species were ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 125–164 : Autor(es): Frolkina, G.A., M.P. Konstantinova and I.A Trunov

5. Telemetry monitoring of ecological resources

   monitoring using the Argos/Tiros system and satellite transmission of data are also covered. File:  24 ... . Transmitters on the animals have no special requirements. This system offers possibility as a remote ... there is no easy way to distinguish the animals on the chart. To meet the need to monitor more animals ... and off if desired. Since the system has no moving parts it can operate over a wide temperature ... Argos data processing and to use the down-link data to determine location with an on-site data ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 495-511 : Autor(es): Kuechle, V.B.

6. Seal mitigation measures on trawl vessels fishing for krill in CCAMLR Subarea 48.3

   Abstract / Description:  At the 2004 meeting of the Working Group on Ecosystem Monitoring and Management ... (WG-EMM) in Siena, Italy, the UK reported on the by-catch of fur seals (Arctocephalus gazella) in the ... avoid fur seal deaths in the fishery. WG-EMM requested that the UK provide further details of the ... methods employed for consideration by the ad hoc Working Group on Incidental Mortality Arising from ... net rather than the roof. After this modifi cation, no further captures were reported. The vessel ... allow the seals to escape alive and unharmed. Therefore no further measures were developed ... those on the Esperanza, in that no specifi c mitigation measures were deployed. However, the front ... the nets used on the Koyo Maru No. 8 (Figure 8). The NISSUI system was developed by Nippon Suisan ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 195–205 : Autor(es): Hooper, J., J.M. Clark, C. Charman and D. Agnew

7. Fishing for toothfish using pots: results of trials undertaken around South Georgia, March–May 2000

   , March–May 2000 Abstract / Description:  During the period March to May 2000, the UK undertook trials of ... (Subarea 48.3). This method has the potential to minimise, or eliminate, incidental bird mortality when ... compared to the standard longline method. This paper describes the trial and the results, and discusses the ... commercial viability of this fishing method for toothfish fisheries in the CCAMLR Convention Area. While the ... entangled in the fishing gear was also very low; no bird mortalities were witnessed during the trial. Due ... , no birds were observed in the direct vicinity of sinking pots. This may result from tlie fact that ... observed in the vicinity of tlie vessel, but showed no interest in hauling operations. The fourth aim of ... , which may have affected their condition. No crabs had vitality stage 3 after the experiment; all ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 93–105 : Autor(es): Agnew, D.J., T.M. Daw, G.M. Pilling and M.G. Purves

8. Preliminary model of krill fishery behaviour in Subarea 48.1

   :  A simple model of the behaviour of the krill fishery in FAO Statistical Subarea 48.1 (South Shetland ... Islands and Antarctic Peninsula) is described. Parameters of the model are calculated from Chilean fishery ... data over the period 1989 to 1992. The distribution of catches predicted by the model, which is ... restricted to the four months December to March, compares favourably with the historical distribution of ... effectively unlimited compared to the size of the catch and thus there was no limit to catch in any fine ... simple model of the behaviour of the krill fishery in FAO Statistical Subarea 48.1 (South Shetland ... Islands and Antarctic Peninsula) is described. Parameters of the model are calculated from Chilean ... fishery data over the period 1989 to 1992. The distribution of catches predicted by the model, which is ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 71–79 : Autor(es): Agnew, D.J. and V.H. Marín

9. Growth and natural mortality of Patagonian rockcod (Patagonotothen guntheri shagensis) from Shag Rocks shelf

   shagensis) from Shag Rocks shelf Abstract / Description:  The parameters of Bertalanffy’s growth equation ... -weight data of research and fishery survey cruises in the Shag Rocks area from 1978 to 1986. The natural ... mortality rate was assessed by six different methods and was within a range of 0.63 to 1.06. The mean value ... of natural mortality M=0.8 was used in calculations and the optimal age and length for harvesting ... ROCKCOD (PATAGONOTOTHEN GUNTHERI SHAGENS/S) FROM SHAG ROCKS SHELF V.1. Shlibanov Abstract The ... calculated by using age and length-weight data of research and fishery survey cruises in the Shag Rocks ... area from 1978 to 1986. The natural mortality rate was assessed by six different methods and was ... within a range of 0.63 to 1.06. The mean value of natural mortality M=0.8 was used in calculations and ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 111–121 : Autor(es): Shlibanov, V.I.

10. Potential interactions between wandering albatrosses and longline fisheries for Patagonian toothfish at South Georgia

    Patagonian toothfish at South Georgia Abstract / Description:  We examine the extent of overlap between South ... May and October (main chick-rearing period). However during the chick-brooding period, from March ... through mid-May, adult birds of both sexes spend most of their time at sea over the South Georgia ... continental shelf in areas very similar to where the longline fishery operates and are therefore at serious ... transit to or from their breeding site at Bird Island. Therefore, during the post-brood chick-rearing ... and from the breeding site) was associated with the Patagonian Shelf, particularly slope areas over ... Cross, Madingley Road Cambridge CB3 OET United Kingdom Abstract We examine the extent of overlap ... ) and between late May and October (main chick-rearing period). However during the chick-brooding ...

    Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 101–110 : Autor(es): Croxall, J.P. and P.A. Prince

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