Resultados de la búsqueda

1. Comparing two and three frequency dB window identification techniques for estimating Antarctic krill density

   . Density was estimated, from identified krill targets, using the 120 kHz data and an acoustic scattering ... Abstract:  Three surveys of acoustic data from around South Georgia, collected using a four ... frequency echosounder (38, 70, 120 and 200 kHz), were used to characterise Antarctic krill. Identification ... of krill targets was carried out using different permutations of two and three-frequency windows ...

   Meeting Document : SG-ASAM-18/01 : Autor(es): S. Fielding

2. Net diagrams for Chilean vessels notified for krill fishery in 2015/16 Notification ID 86795, 86796 and 86797

   Abstract:  According to the requirements of Conservation Measure 21-03 (2014), this document ... vessels Betanzos and Cabo de Hornos, who present fishing notifications for the 2015/16 krill fishery ... Chilean vessels notified for krill fishery in 2015/16 Notification ID 86795, 86796 and 86797 Approval ...

   Meeting Document : WG-EMM-15/03 : Autor(es): Delegation of Chile

3. An outline of the proposed dedicated krill survey for CCAMLR Division 58.4.1 during 2018/19 season by the Japanese survey vessel, Kaiyo-maru

   Abstract:  A dedicated krill survey for CCAMLR Division 58.4.1 during 2018/19 season is planned by ... Japan. No krill biomass has been estimated in the Division since 1996 when Australia carried out BROKE ... . There are two main objectives of our survey: (1) estimation of krill biomass to update B(0) in the area ... vessel, Kaiyo-maru, will be used in the survey. The krill survey (echosounder and RMT) and subsequent ...

   Meeting Document : SG-ASAM-17/01 : Autor(es): H. Murase, K. Abe, T. Ichii and A. Kawabata

4. Information provided by Members on acoustic equipment on krill fishing vessels

   Abstract:  Understanding the equipment used and the data handling capability of the krill fishing ... vessels is important background information in considering the implementation  of potential data ... on acoustic equipment on krill fishing vessels Approval:  Approved ...

   Meeting Document : SG-ASAM-12/06 Rev. 1 : Autor(es): Secretariat

5. Evaluation of Antarctic krill biomass and distribution off the South Orkney Islands 2011-2015

   Abstract:  Annual acoustic trawl surveys for krill monitoring have been carried out by the ... early in the fishing season (January/February), using two different krill fishing vessels as platforms ... and abundance of krill near the South Orkneys among years, we here attempt to generate a coherent ... series of krill density estimates from the 5 years of surveys. We follow the CCAMLR protocol for biomass ...

   Meeting Document : WG-EMM-15/54 : Autor(es): G. Skaret, B.A. Krafft, L. Calise (Norway), J. Watkins (UK), R. Pedersen and O.R. Godø (Norway)

6. A comparison of acoustic targets at South Georgia and the South Orkney Islands during a season of profound krill scarcity

   zooplankton (smaller than krill). To counter the absence of krill length-frequency data from Coronation Island ... conjunction with appropriate 120 kHz data to calculate krill density estimates for both survey areas. Krill ... acoustic targets into three biological categories: Antarctic krill; nekton (larger than krill); and ... density; for example one echo-integration interval contained 104 times the mean krill density. An ...

   Meeting Document : WG-EMM-95/75 : Autor(es): Watkins, J.L., Brierley, A.S.

7. Recruitment of Antarctic krill (Euphausia superba) and possible causes for its variability

   Abstract:  Between year variability of krill year class success and recruitment during the 1977 ... -1994 period are described based on data from German expeditions and U.S. Antarctic Marine Living ... environmental data indicate that good and poor year class success are directly and indirectly related to sea ice ... conditions during the preceding winter season, the timing of krill spawning, and the occurrence of dense salp ...

   Meeting Document : WG-EMM-95/15 : Autor(es): Siegel, V., Loeb, V.

8. How trophic dynamics of adult Antarctic krill Euphausia superba responses to the condition of no ice in the water during the winter: a case study at South Georgia?

   Abstract:  Understanding the variation in krill diet during winter is crucial to elucidate the ... overwintering of krill in the Southern Ocean. The information on trophic variation of krill under ice-free ... waters during the winter can also provide the insight for understanding the response of krill to global ... diet of adult krill with size and month during the winter season (June to September 2016) at the South ...

   Meeting Document : WG-EMM-2019/P04 : Autor(es): G.P. Zhu, H.T. Zhang, B. Deng and Q.Y. Yang

9. Are penguins and seals in competition for Antarctic krill at South Georgia?

   consumers of Antarctic krill. In recent years the population of fur seals has increased whereas that of ... macaroni penguins has declined. Both species feed on krill of similar size ranges, dive to similar depths ... ) satellite-tracking data to investigate the spatial separation of these two species whilst at sea during the ... breeding seasons of 1999 and 2000; b) diet data to assess potential changes in their trophic niches between ...

   Meeting Document : WG-EMM-01/22 : Autor(es): K.E. Barlow, I.L. Boyd, J.P. Croxall, I.J. Staniland, K. Reid and A.S. Brierley (United Kingdom)

10. An assessment of the use of ocean gliders to undertake acoustic measurements of zooplankton: the distribution and density of Antarctic krill in the Weddell Sea

    a thresholded schools analysis technique (SHAPES), and acoustic data were converted to krill density ... the distribution of Antarctic krill (Euphausia superba). During the glider missions, a research vessel ... taken to validate acoustic targets and parameterize acoustic models. Krill targets were identified using ... density estimates by up to 8-fold. Glider-based, echo-sounder–derived krill density profiles for the two ...

    Meeting Document : WG-EMM-14/P02 : Autor(es): D. Guihen, S. Fielding, E. Murphy, K. Heywood and G. Griffiths

Páginas