Resultados de la búsqueda

1. A multi-frequency method for improved accuracy and precision of in situ target strength measurements

   provided information about the identity of constituents in a mixed species assembly. Author(s):  Hewitt ... Abstract:  The effectiveness of a split-beam echosounder system to delineate single scatterers and ... synchronized signals from two or more adjacent split-beam transducers of different frequencies. The accuracy of ... from one of the split-beam transducers, additional corresponding TS measurements can be collected with ...

   Meeting Document : WG-EMM-97/24 : Autor(es): Hewitt, R.P., Soule, M.A., Demer, D.A.

2. Standardised estimates of D. eleginoides catches per effort in Subarea 48.3 using information for 1985/86–1990/91 seasons

   tooth-fish in Subdivision 48.3 during 1986-199 1 is presented. The fishery was mainly carried out in ... -100 cm, which exceeded modes for the latest years of fishery. Using the generalized additive model the ... catch per effort estimates for 1986-99 were standardize. The fishery efficiency in 1986-95 was ... approximately similar, while in 1996-99 it decreased sharply. It is shown that significance of such factors as a ...

   Meeting Document : WG-FSA-00/33 : Autor(es): P. Gasiukov (Russia) and V. Bibik (Ukraine)

3. Oxygen and carbon stable isotopes in otoliths record spatial isolation of Patagonian toothfish (Dissostichus eleginoides)

   distinguish South American-caught fish from those taken in the Antarctic. Values of δ18O and δ13C predicted ... prior evidence of population isolation. Values of δ18O in the otoliths reflected ambient values as well ... Abstract:  Strong contrasts in ambient isotope ratios and in diet suggest stable isotopes in the ... depletion of δ13C at South Georgia compared to the Patagonian Shelf were most likely linked to differences ...

   Meeting Document : WG-FSA-08/P03 : Autor(es): J.R. Ashford and C.M. Jones

4. Variation in reproductive performance of seabirds and seals at South Georgia, 1976–1986 and its implications for southern ocean monitoring studies

   Orkney Islands) are summarised and reviewed. Breeding success of the Wandering Albatross, which breeds in ... . The fluctuations in reproductive performance of the krill-eating, summer-breeding penguins at Signy ... Chinstraps, which suffered badly in 1980-81 and 1982-83) with the date of ice break-out in late spring ... , penguin and fur seal biology. The results are reviewed in terms of their suitability for detecting changes ...

   Meeting Document : SC-CAMLR-VI/BG/15 : Autor(es): J.P. Croxall, T.S. McCann, P.A. Prince and P. Rothery (United Kingdom)

5. Interactions between seabirds and deep water hake trawl gear: an assessment of impacts in South African waters 2004/05

   Abstract:  This study estimates the mortality of seabirds in the South African deep water hake ... 000-31 000) birds killed per year, of which 85% are killed on warps and 15% entangled in nets. Of the ... of fishery wastes. Using a bootstrapping approach to estimate 95% confidence intervals (CI), the ... dumping in summer. Serious warp incidents were independent of age among albatrosses, but there was a ...

   Meeting Document : WG-FSA-06/41 : Autor(es): B.P. Watkins, S.L. Petersen and P.G. Ryan (South Africa)

6. Brief analysis of tag-recapture data in Statistical Subarea 48.4

   Patagonian toothfish (Dissostichus eleginoides) in Subarea 48.4. It describes the tagging procedure, the ... information gained about biology, growth and movement of Patagonian toothfish, and looks at the potential link ... between statistical subareas 48.3 and 48.4. The characterisation of tag recapture data from Subarea 48.4 ... shows that the tagging programme is successful in providing substantial information for the stock ...

   Meeting Document : WG-FSA-14/50 : Autor(es): M. Soeffker, C. Darby, M. Belchier and R. Scott (United Kingdom)

7. Preliminary modelling of potential climate-change impacts on krill and a krill-dependent predator in CCAMLR Subareas 48.1 to 48.3

   affect krill resources and the marine ecosystem in Antarctic waters is critical. Previous research has ... assessed the potential consequences of these impacts for both the krill stock and its dependent predators ... biomass of krill as well as the abundance of krill-dependent predators. These outcomes have implications ... modelling of potential climate-change impacts on krill and a krill-dependent predator in CCAMLR Subareas ...

   Meeting Document : WG-EMM-16/53 : Autor(es): E.S. Klein, S.L. Hill, G.M. Watters and J.T. Hinke

8. Review of skate (Rajiformes) by-catch in CCAMLR toothfish fisheries

   useful for a future focus topic in the SISO. Author(s):  Secretariat Title:  Review of skate (Rajiformes ... Abstract:  Available data on the by-catch of Rajiformes was extracted from the CCAMLR database ... spatial ranges for some species.  The data collected as part of CCAMLR fisheries represents a very ... substantial repository of information on Southern Ocean Rajiformes; realising the full potential of this data ...

   Meeting Document : WG-FSA-14/12 : Autor(es): Secretariat

9. Preliminary examination of otolith microchemistry to determine stock structure in Antarctic toothfish (Dissostichus mawsoni) between SSRU 88.1C and 88.2H

   concentrations in the otolith edge and then to (ii) assess the potential of natal signatures to distinguish ... shown. This resulted in the correct classification of 63% of fish overall to their original capture ...   stocks among these regions. For the elements (Mg, Al and Sr) spatial variation in otolith chemistry was ... success (79%), compared to the otolith edge which suggested the majority of fish from SSRU 88.1C and 88.2H ...

   Meeting Document : WG-SAM-14/33 : Autor(es): R. Tana, B.J. Hicks, C. Pilditch and S.M. Hanchet (New Zealand)

10. Annual report of research fishing operations at Division 58.4.4b in 2016/17 fishing season

    Abstract:  This paper represents the annual report of a multi-member longline survey on Patagonian ... toothfish (Dissostichus eleginoides) at Division 58.4.4b in 2016/17 fishing season by France and Japan. The ... , 2018 for September to November French cruise). In this paper, the data set during last fishing season ... (2016/17) was used for reporting the quantity of data, samples collected, and results of quick analysis ...

    Meeting Document : WG-SAM-18/31 : Autor(es): Delegations of Japan and France

Páginas