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1. Estimating the impact of depredation by killer whales and sperm whales on longline fishing for toothfish (Dissostichus eleginoides) around South Georgia

   . Since 2003, cetaceans have been observed on 22% of 14 300 observed lines, with killer whales present on ... whales occur during May at the start of the season with the sightings becoming fewer towards the end of ... the season in August. Killer whale interactions appear to be more consistent with no obvious pattern ... related to the pattern of fishing effort. By comparing catch rates with and without the presence of ... management. Industry perceives marine mammals as direct competi- tors for a resource, with economic losses ... been observed on 22% of 14 300 observed lines, with killer whales present on 3.8% and sperm whales on ... the start of the season with the sightings becoming fewer towards the end of the season in August ... . Killer whale interactions appear to be more consistent with no obvious pattern between months. Both ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 163–178 : Автор(ы): Moir Clark, J. and D.J. Agnew

2. Some thoughts on precautionary measures for the krill fishery

   refinement to provide a sufficient safeguard for land-based predators. A new approach is described which ... land-based predators. A new approach is described which takes account of the requirements of land ... obtaining information about a harvested marine resource is to collect information from the fishery ... predators. A major difficulty with this approach is that CCAMLR subareas, such as 48.3, are known to be ... /81 season, over a decade ago, which means that with a lifespan of five to seven years, at least two ...

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

3. Estimation of natural mortality for the Patagonian toothfish at Heard and McDonald Islands using catch-at-age and aged mark-recapture data from the main trawl ground

   :  Attempts to estimate natural mortality, as a single constant M, simultaneously with other model parameters ... new model for describing total mortality which disaggregates fishing and natural mortality differently ... fishery, the CCODE model gave a well-behaved profile for the log-likelihood with the corresponding ... - ity of a stock when considered in combination with annual number of recruits, growth rate in body ... 0.13 y–1 rather than estimate this parameter jointly with other model para meters. The use of a fixed ... , as a single constant M, simultaneously with other model parameters in integrated assessments via ... the CCODE model (constant catch ODE). The CCODE model is a new model for describing total mortality ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 29–45 : Автор(ы): Candy, S.G., D.C. Welsford, T. Lamb, J.J. Verdouw and J.J. Hutchins

4. Editorial

   contents reflect the important science that supports CCAMLR’s management of the marine living resources of ... assessment of the population status of toothfish and of assessing the risk associated with gathering data and ... potential costs of research catches as well as the potential spatial overlap with vulnerable benthic ... Science coincides with the 30th meeting of the CCAMLR Scientific Committee. Over those 30 years, several ... important science that sup- ports CCAMLR’s management of the marine living resources of the Southern Ocean ... population status of toothfish and of assessing the risk associated with gathering data and interpreting ... costs of research catches as well as the potential spatial overlap with vulnerable benthic habitats. In ... coincides with the 30th meeting of the CCAMLR Scientific Committee. Over those 30 years, several thousand ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 167 : Автор(ы): Editors

5. A study of Patagonian toothfish (Dissostichus eleginoides) post-tagging survivorship in Subarea 48.3

   . Toothfish were kept in tanks with seawater replacement for at least 12 hours after tagging. On one vessel ... , fish with a variety of injuries were selected to see if this affected recovery. In the final analysis ... , 396 animals were included, with an overall survivorship of 90%. Smaller animals and animals in better ... . Venables, W.N and B.D. Ripley. 1998. Modern Applied Statistics with S-Plus. Second Edition. Springer, New ... D.J. Agnew, J. Moir Clark, P.A. McCarthy, M. Unwin, M. Ward and L. Jones Marine Resources ... . Moreno Marine Resources Assessment Group 18 Queen Street, London W1J 5PN, United Kingdom Abstract ... carried out on eight different vessels fishing in Subarea 48.3. Toothfish were kept in tanks with ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 279–289 : Автор(ы): Agnew, D.J., J. Moir Clark, P.A. McCarthy, M. Unwin, M. Ward, L. Jones, G. Breedt, S. Du Plessis, J. Van Heerdon and G. Moreno

6. Analysis of haul data from the South Georgia krill fishery

   several hauls were undertaken by each vessel (average 7.9 in 1993,9.9 in 1995, and 7.0 in 1996), with ... establish the time required for each phase of the fishing operation. The times associated with shooting and ... hauling the net were usually short and showed little variation, whereas the time associated with the ... existed between years, with 1995 being a better season than either 1994 or 1996. Aspects of mesoscale ... John Pearce, MRAG for extracting the database records. The marine GIS was developed with assistance ... each vessel (average 7.9 in 1993,9.9 in 1995, and 7.0 in 1996), with hauls producing higher catch ... each phase of the fishing operation. The times associated with shooting and hauling the net were ... usually short and showed little variation, whereas the time associated with the actual fishing period was ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 9–30 : Автор(ы): Trathan, P.N., I. Everson, E.J. Murphy and G.B. Parkes

7. Line weights of constant mass (and sink rates) for Spanish system Patagonian toothfish longline vessels

   with seabirds. The weights typically used are collections of rocks enclosed in netting bags. During ... relationship between the sink rates of longlines equipped with bags of rocks (4, 6 and 8 kg) and those with ... steel weights of equivalent masses. The purpose of the experiment was to provide vessel operators with ... the option of substituting steel weights for rock weights while remaining in compliance with the sink ... 40 m intervals on longlines to minimise interactions with seabirds. The weights typically used are ... with bags of rocks (4, 6 and 8 kg) and those with steel weights of equivalent masses. The purpose of ... the experiment was to provide vessel operators with the option of substituting steel weights for rock ... weights while remaining in compliance with the sink rates associated with the line-weighting provisions ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 93–106 : Автор(ы): Robertson, G., C.A. Moreno, E. Gutiérrez, S.G. Candy, E.F. Melvin and J.P. Seco Pon

8. Assessments of the stocks of Notothenia rossii marmorata and Champsocephalus gunnari in the South Georgia area

   its pre-exploitation biomass, while the stock of Champsocephalus gunnari has fluctuated greatly with ... , while the stock of Champsocephalus gunnari has fluctuated greatly with no obvious trend ... age data, but with different input values of the terminal fishing mortality and natural mortality ... January/February 1985 of 12,781 tonnes with a log (?) s.d. of 99.9%, based on experimental trawls ... recruited stock in year t made up of new recruits Pat proportion by number of age class a in year t ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 1-21 : Автор(ы): Cooke, J.G.

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

   not tested, so that present ageing data haveto be considered with caution. The estimated age range was ... consisted mainly of adult individuals between 1 and 3 years of age, with very few older fish.   File ... PENINSULA) M. La Mesa and A. De Felice ISMAR-CNR, Istituto di Scienze Marine Sezione Pesca Marittima di ... Southwest Fisheries Science Center National Marine Fisheries Service 8604 La Jolla Shores Drive La Jolla ... to be considered with caution. The estimated age range was 1–5 years for males and 1–4 years for ... years of age, with very few older fish. Résumé L’étude de l’âge et de la croissance de la grande ...

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

10. Location and intensity of the Soviet krill fishery in the Elephant Island area (South Shetland Islands), 1988/89

    fished and followed as they drift from the island with the current; and (iii) vessels return to position ... as they drift from the island with the current; and (iii) vessels return to position (i) when ... the Conservation of Antarctic Marine Living Resources (CCAMLR). The information obtained may be ... with a 78/420 m trawl was taken to be the standard fishing unit. It yielded the highest total catch of ... all vessels engaged in the fishery. 307 Calculations and mapping of fishing areas were made with ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 305–335 : Автор(ы): Sushin, V.A. and A.S. Myskov

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