Resultados de la búsqueda

1. Results from the groundfish survey conducted in CCAMLR Subarea 48.3 in January/February 2011

   between the 27th January and 6th February 2011. 87 random hauls were completed, with good coverage across ... mean biomass of 49,353 tonnes was estimated for mackerel icefish, with a lower 1-sided 95% CL of 31,373 ... tonnes. Euphausiidae was the dominant prey item in the mackerel icefish diet with increased dietary ... Patagonian toothfish were greater than in 2009 and 2010, with a large haul of 40-45cm fish (1.6t) around Shag ...

   Meeting Document : WG-FSA-11/29 : Autor(es): J. Brown, S. Gregory, K. Brigden, R. Benedet, O. Hogg, P. Brewin and L. Featherstone (United Kingdom)

2. Testing early life connectivity using otolith chemistry and particle-tracking simulations

   ), a species with a long pelagic larval phase, along the Antarctic Circumpolar Current (ACC) and ... compared the chemistry with simulated particle transport using a circulation model. Material laid down in ... Georgia consistent with a population boundary, and evidence of finer-scale heterogeneity between sampling ... eastern and northern shelves, indicating a single, self-recruiting population. Consistent with the otolith ...

   Meeting Document : WG-FSA-10/P02 : Autor(es): J. Ashford, M. La Mesa, B.A. Fach, C. Jones and I. Everson

3. Mean circulation and hydrography in the Ross Sea sector, Southern Ocean: representation in numerical models

   900m at the gyral eastern end compare favourably with float data. On-shelf model depth-averaged west ... –east flow is relatively consistent with that reconstructed from longline fishing records. These flows ... have components associated with isopycnal gradients in both light and dense waters. The climate models ... reproduce characteristic isopycnal layer inflections (‘V’s) associated with the observed Antarctic Slope ...

   Meeting Document : WG-EMM-10/P13 : Autor(es): G.J. Rickard, M.J. Roberts, M.J.M. Williams, A. Dunn and M.H. Smith (2010)

4. Multiyear changes in distribution and abundance of Salpa thompsoni in the Western Antarctic Peninsula region

   characterized by a circumpolar distribution and its appearance is clearly associated with the occurrence of the ... analyses, coupled with environmental data, obtained both during sampling and from satellite data, allowed ... to prove that the distribution of salps was significantly correlated with water temperature and ... suggest that with climatic changes, such as temperature increase and reduction of sea-ice cover, the ...

   Meeting Document : WG-EMM-16/75 : Autor(es): A. Panasiuk, A. Słomska, J. Wawrzynek, M. Konik and A. Weydmann

5. An illustrative management procedure for exploring dynamic feedback in krill catch limit allocations among small-scale management units

   which simulates the “true” dynamics of the resource with tests across a wide range of scenarios for the ... here have a feedback structure, and hence are able to react and self-correct. It is important, as with ... subdivide the krill catch between SSMUs. Different MPs are then simulation tested with their performances ... average krill catches per SSMU associated with each MP. The key assumption made here is that data will be ...

   Meeting Document : WG-EMM-06/28 : Autor(es): É. Plagányi and D. Butterworth (South Africa)

6. RESOURCES EVALUATION OF ANTARCTIC KRILL EUPHAUSIA SUPERBA DANA USING AREAL TRAWLING AND HYDRO-ACOUSTIC DATA

   provided with probability methods and spatial analyses requiring knowledge of statistical distribution ... analyses procedures applied for trawling and hydro-acoustic sampling have to in compliance with the rules ... . Traditional concepts of observation system concerning the resources of krill should be further developed with ... applications of rules and parameters dealing with statistical distributions of population density, information ...

   Meeting Document : WG-SAM-08/P01 : Autor(es): L.A. Kovalchuk (Ukraine)

7. Uncertainty in acoustic surveys of Antarctic krill

   acoustic surveys. The variance in system calibration with a standard sphere was evaluated in relation to ... different standard spheres with the results of a calibration by self-reciprocity (Demer and Hewitt ... with a standard sphere were estimated as-1.2 dB and ±0.3 dB, respectively. Uncertainty in estimating ... higher than those calculated disregarding biases due to DVM, with a standard deviation of 0.6 dB ...

   Meeting Document : WG-EMM-95/72 : Autor(es): Demer, D.A.

8. Effects of recruitment variability and natural mortality on Generalised Yield Model projections and the CCAMLR Decision Rules for Antarctic krill

   Peninsula were used as proxies for recruitment variability. Simulations were run for 21 years with either no ... fishing, or with fishing at either the trigger level (gamma = 0.0103), the precautionary catch limit ... ;variable mortality" (M with a uniform distribution between 2 and 0.8, or annual survivals varying ... "escapement" rule. For the base case simulations with M=0.8 and additional recruitment CVs of ...

   Meeting Document : WG-EMM-12/26 : Autor(es): D. Kinzey, G. Watters and C. Reiss (USA)

9. KRILLBASE: a circumpolar database of Antarctic krill and salp numerical densities, 1926–2016

   database, KRILLBASE, together with environmental information, standardisation and metadata. The aim is to ... the potential uses of this database. With increasing numbers of requests for these data we here ... provide an updated version of KRILLBASE that contains data from 15194 net hauls, including 12758 with ... krill abundance data and 9726 with salp abundance data. These data were collected by 10 nations and span ...

   Meeting Document : WG-EMM-17/P03 : Autor(es): A. Atkinson, S.L. Hill, E.A. Pakhomov, V. Siegel, R. Anadon, S. Chiba, K.L. Daly, R. Downie, S. Fielding, P. Fretwell, L. Gerrish, G.W. Hosie, M.J. Jessopp, S. Kawaguchi, B.A. Krafft, V. Loeb, J. Nishikawa, H.J. Peat, C.S. Reiss, R.M. Ross, L.B. Quetin, K. Schmidt, D.K. Steinberg, R.C. Subramaniam, G.A. Tarling and P. Ward

10. Net sample validation of acoustic techniques used to identify and size Antarctic krill

    sampling characteristic types of acoustic target with nets. More recently partitioning of backscatter into ... (MVBS) data at 120 and 38 kHz were collected with a Simrad EK500 echo sounder, and net samples were ... collected with an RMT8. Around 80 % of the targets thought to be krill on the basis of their appearance on ... frequency data and compared with that obtained in net hauls. This comparison revealed that a simplified bent ...

    Meeting Document : WG-EMM-97/46 : Autor(es): Watkins, J.L., Brierley, A.S.

Páginas