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1. Management and assessment options for the crab fishery around South Georgia

   design. One of the main aims in designing a management plan is to allow the fishery to develop at a rate ... . The fishery is also new to CCAMLR, both in terms of the species and fishing gear. We provide an ... overview of the management options for crab fisheries in general and then consider these options in the ... context of this crab fishery with specific reference to the principles of the CCAMLR Convention. We ... develop at a rate compatible with the expansion of the information base available for assessment ... OPTIONS Most lithodid crab fisheries are managed by at least a minimum of regulations known as the ... aimed at a target exploitation rate, defined as the ratio between th; catch and the biomass of the ... greatest net annual increment is unknown. All three aspects of 'size-sex-season' management are aimed at ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 193–202 : Autor(es): Basson, M. and D.D. Hoggarth

2. 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 ... season. These approaches, aimed at reducing seal entanglements, are similar to the two systems ... Street, London W1J 5PN United Kingdom Email – j.hooper@mrag.co.uk Abstract At the 2004 meeting of the ... Hooper et al. 196 Introduction At the 2004 meeting of the Working Group on Ecosystem Monitoring and ... measures on trawl vessels fi shing for krill of a metal grid sloped at an angle to divert seals out ... groundrope respectively. However, access to the net remained available at the fl anks of the barrier ...

   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

3. Seabird mortality in the Patagonian toothfish longline fishery around Crozet and Kerguelen Islands, 2001–2003

   eleginoides) longline fishery operating in the French Exclusive Economic Zones (EEZs) of Crozet and Kerguelen ... caught over this period. A multivariate analysis suggests that a combination of factors (environmental ... and relating to fishing techniques) have an effect on the observed numbers of seabirds caught ... incidentally. The results of this study suggest that a significant part of the mortality of white-chinned ... incidentally were taken aboard during hauling of the mainline and were identifi ed at the species, genus or ... family level (0.05% of the birds were not identifi ed at species level). Giant petrels (Macronectes spp ... .) were not identifi ed at the species level. An additional range of factors describing the ... (Dissostichus eleginoides)). The bird-scaring system consists of one, two or three streamer lines attached at ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 53–80 : Autor(es): Delord, K., N. Gasco, H. Weimerskirch, C. Barbraud and T. Micol

4. Some thoughts on precautionary measures for the krill fishery

   :  The concept of precautionary measures for krill is discussed. A precautionary catch limit, based on ... takes account of the requirements of land-based predators. Implementation of the approach is discussed ... and the question of how the method relates to the current CCAMLR Ecosystem Monitoring Program (CEMP ... those in which many land-based predators forage at the height of the breeding season. Concern has been ... and at the same time support large populations of dependent species. The FIBEX survey indicated the ... /81 season, over a decade ago, which means that with a lifespan of five to seven years, at least two ... land-based predators. Much of this work has been undertaken at South Georgia, the major land mass ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 1–11 : Autor(es): Everson, I. and W.K. de la Mare

5. Target strength studies on Antarctic silverfish (Pleuragramma antarcticum) in the Ross Sea

   continental slope and shelf of the Ross Sea at depths from 30 to 120 m, during the Italian expeditions of 1997 ... indicate that the TS–TL relationships at 38, 120 and 200 kHz of adults of P. antarcticum differ ... Ross Sea Abstract / Description:  Target strength (TS) of preserved (frozen and defrosted) Antarctic ... silverfish (Pleuragramma antarcticum) of total length (TL) from 110 to 202.5 mm were measured ex situ (Ancona ... experiments targeted at juveniles and post-larvae of P. antarcticum with a total length from 13 to 70 mm ... , were conducted in the southeast of the continental slope and shelf of the Ross Sea at depths from 30 ... , and at length >45–48 mm as that of an almost fluid object containing distributed scattering elements ... experiments. The aim of this paper is to determine TS of P. antarcticum at 38, 120 and 200 kHz using in ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 75–104 : Autor(es): Azzali, M., I. Leonori, I. Biagiotti, A. De Felice, M. Angiolillo, M. Bottaro and M. Vacchi

6. Archival and satellite-linked data recorders

   provides an overview of currently-available data recorders for use in research on marine animals. These ... recorders are deployed on freely swimming animals and gather data on aspects of an animal’'s diving ... behaviour. The records can be recovered in one of two ways: the data recorder must either be recovered ... intact, or the data recorder must be capable of disseminating its data via a radio link, such as the ... source to track across the width of the film while an electric motor advances the film at a steady rate ... provide time-at-depth or time-at-speed records. The principle of both units is the same : a radioactive ... . The longer the animal spends at a given depth (or speed), the greater the exposure of the film at ... the corresponding location. Thus the relative exposure of the film at different depth (or speed ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 475-493 : Autor(es): Hill, R.D.

7. Using ecosystem monitoring data to detect impacts

   purpose of ecosystem monitoring programs is to indicate the state of ecosystems and whether they have been ... impacted by activities such as fishing. This paper discusses a range of methods for inferring such impacts ... using monitoring data with no control sites. These methods assess either (i) the expected probability of ... an observed value in an unimpacted system, or (ii) the frequency of values below a fixed reference ... (Arctocephalus gazella) pup production at South Georgia from the early 1990s within a few years of its onset ... , 1997). At Bird Island, South Georgia, a total of 17 biological parameters (including diet, breeding ... is not monitored at the relevant scale. Nonetheless, the CEMP parameters are indicative of ... system. A monitoring program records a new observation, at, each year t. For ease of nota- tion ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 197–212 : Autor(es): Hill, S.L., J. Forcada, P.N. Trathan and C.M. Waluda

8. Scientific observations in CCAMLR fisheries – past, present and future

   / Description:  CCAMLR has the primary competency for managing fishing south of the Antarctic Polar Front ... . Despite a relatively long history of scientific research and fisheries, CCAMLR’s fisheries management ... -independent studies are difficult and expensive to conduct. In addition, the size of the Convention Area, its ... standard catch and effort data supplied by vessels, the collection of data by scientifically qualified ... technical coordinators to receive observer reports from vessels at the end of each fi shing trip and email ... waters located south of the Antarctic Convergence (or Polar Front) at about 50°S (Figure 1). These ... cost of at-sea observer programs (US$) calculated from information provided by CCAMLR Members ... is based on an average at-sea cost of US$240 a day and excludes travel expenses and daily subsistence ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 81–98 : Autor(es): Sabourenkov, E.N. and E. Appleyard

9. Seabird interactions with trawl and longline fisheries for Dissostichus eleginoides and Champsocephalus gunnari

   , probably because the birds at the former site are distracted from the longlines by the discharge of offal ... and Champsocephalus gunnari Abstract / Description:  The behaviour of seabirds and the rate of ... . eleginoides and trawling for mackerel icefish (Champsocephalus gunnari) were also observed at Kerguelen. Many ... -chinned petrels (Procellaria aequinoctialis) were common only at Kerguelen. Bird mortality during trawling ... trawler Austral Leader. This was fishing for D. eleginoides 3 to 5 n miles to the west of the island at ... trawling at either location, even though the species composition of birds following the ships, and in ... low figure. Most of this mortality was observed on the one vessel with a netsonde cable where at ... , the impact of this mortality is tempered by the size of the population at Kerguelen (100 000 to 300 ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 93–99 : Autor(es): Williams, R. and D. Capdeville

10. Champsocephalus gunnari stock status in the South Georgia area

    predicted period fishing intensity was at the level of that in 1987/88; (c) For the predicted period fishing ... shows that at the currently used value of stock size and even at the lowest possible recruitment levels ... / Description:  ata of age composition and fishing effort for 1976/77-1987/88 were used to analyse stock status ... , Gamma methods, Pope and Shepherd method, using F regression on fishing effort and method of average ... fishing intensity was at the level of that in 1987/88; ( c ) For the predicted period fishing intensity ... that at the currently used value of stock size and even at the lowest possible recruitment levels and ... THE SOUTH GEORGIA AREA R. Borodin, P. Kochkin Abstract Data of age composition and fishing ... , using F regression on fishing effort and method of average weighted F. For 1986/87 the values ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 1-18 : Autor(es): Borodin, R. and P. Kochkin

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