Résultats de la recherche

1. Impacts of rising sea temperature on krill increase risks for predators in the Scotia Sea

   , penguins, seals, and fish) in the Scotia Sea. We also investigated the potential to mitigate depletion risk ... Antarctic krill, Euphausia superba, might affect populations of krill and dependent predators (whales ... for predators by curtailing krill fishing at different points in the 21st century. The projected ... effects of ocean warming on krill biomass were strongest in the northern Scotia Sea, with a ≥ 40% decline ...

   Meeting Document : WG-EMM-18/P02 : Auteur(s): E.S. Klein, S.L. Hill, J.T. Hinke, T. Phillips and G.M. Watters

2. A conceptual model of Japanese krill fishery

   Abstract:  The behaviour patterns of Japanese krill fishery vessels in Area 48 were analysed using ... , krill density, krill, size, ice condition, transshipment, and salp-by catch accounted for 95.6% of the ... changes. Although low krill density was the primary reason for changing fishing grounds, other seasonal ... succession of the Japanese krill fishing operation revealed that they tend to utilize fishing grounds close ...

   Meeting Document : WG-EMM-05/30 : Auteur(s): S. Kawaguchi, S. Nicol (Australia), K. Taki and M. Naganobu (Japan)

3. A conceptual model of the krill fishery

   Abstract:  The behaviour patterns of Japanese krill fishery vessels in Area 48 were analysed using ... , krill density, krill, size, ice condition, transshipment, and salp-by catch accounted for 95.6% of the ... changes. Although low krill density was the primary reason for changing fishing grounds, other seasonal ... succession of the Japanese krill fishing operation revealed that they tend to utilize fishing grounds close ...

   Meeting Document : WG-EMM-04/51 : Auteur(s): S. Kawaguchi, S. Nicol (Australia), K. Taki and M. Naganobu (Japan)

4. Measurements of sound-speed and density contrasts of Antarctic krill (Euphausia superba) on board RV Kaiyo Maru

   Abstract:  In order to calculate the target strength of Antarctic krill (Euphausia superba) using ... of krill were measured during the Antarctic surveys conducted by the Japanese RV Kaiyo Maru in 1999 ... /2000 and 2004/2005. Samples of krill were caught by a RMT(1+8). Mass-density of krill was measured by ... . The corresponding sound-speed contrast of krill with mean total lengths of 44.2mm was 1.011 in the ...

   Meeting Document : WG-EMM-08/56 Rev. 1 : Auteur(s): Y. Takao, H. Yasuma, R. Matsukura, K. Amakasu and M. Naganobu (Japan)

5. Krill biomass estimates for South Georgia, December and January 1996/97

   Georgia during December/January 1996/97. Netting suggested that the mean lengths of krill within the ... box-specific krill target strength (TS) values of-38.89 and-38.59 dB kg-1. Acoustic signals believed ... to be attributable to krill were identified on the basis of the difference between mean volume ... backscattering strength at 120 and 38kHz (mvbsl20 kHz- mvbs38kHz between 2 and 12 dB indicative of krill). Mean ...

   Meeting Document : WG-EMM-97/48 : Auteur(s): Goss, C., Watkins, J.L., Brierley, A.S.

6. Krill fishery report: 2010 update

   Abstract:  So far this season (2009/10), ten of the 11 krill fishing vessels licensed by Members ... total catch of krill for the season is 150000-180000 t. In 2008/09, five Members fished for krill in ... largest catch of krill was taken from SSMU SOW (South Orkney West) in Subarea 48.2 (89184 t), and the ... second time that fishing was reported from SSMU APE; previously, 25 t of krill was taken in 1995/96. The ...

   Meeting Document : WG-EMM-10/05 : Auteur(s): Secretariat

7. Quantifying the escape mortality of trawl caught Antarctic krill (Euphausia superba)

   Abstract:  Antarctic krill (Euphausia superba) is an abundant fishery resource, the harvest levels ... of which are expected to increase. However, many of the length classes of krill can escape through ... fishing gear. The methods for determining fishing mortality in krill are still poorly developed. We used a ... mortality rates of escaped krill. Haul duration, hydrological conditions, maximum fishing depth and catch ...

   Meeting Document : WG-EMM-16/04 : Auteur(s): B.A. Krafft, L.A. Krag, A. Engås, S. Nordrum, I. Bruheim and B. Herrmann

8. A krill–predator–fishery model for evaluating candidate management procedures

   Abstract:  The CCAMLR has recognised the need to subdivide the precautionary krill catch limit for ... Statistical Area 48 amongst smaller spatial units in order to minimize the localized depletion of krill in ... necessary to evaluate these procedures in terms of their likely effects on krill and predator populations as ... uncertainty about how the krill-predator- fishery system operates. We describe a model designed to investigate ...

   Meeting Document : WG-EMM-05/13 : Auteur(s): G.M. Watters, J.T. Hinke (USA), K. Reid and S. Hill (United Kingdom)

9. Histopathology of Antarctic krill, Euphausia superba, bearing black spots

   Abstract:  Small black spots have been noticed on the cephalothorax of Antarctic krill, Euphausia ... superba, since January, 2001. To study the nature of the black spots, the krill were sampled in the winter ... bacteria or amorphous material. In the 2007 samples, 42% of the krill had melanized nodules. Most of the ... nodules had an opening on the body surface of the krill. A single melanized nodule often contained more ...

   Meeting Document : WG-EMM-08/P09 : Auteur(s): S. Miwa, T. Kamaishi, T. Matsuyama, T. Hayashi and M. Naganobu

10. Bias in the estimation of krill yield from using a deterministic formulation of the median unexploited spawning biomass

    krill yields according to decision rules that relate spawning stock status to the median unexploited ... spawning biomass, SB0. The first model has been developed specifically for krill, the krill yield model ... ). The krill yield model uses a biased estimate of SB0 with a method for correcting this bias in the ... correction. This paper examines the implications for estimates of krill yield from using the biased estimate ...

    Meeting Document : WG-EMM-97/45 : Auteur(s): de la Mare, W.K., Constable, A.J.

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