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

   Abstract:  Two Monte Carlo simulation models are currently available to CCAMLR for estimating 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,

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

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

   Abstract:  Acoustic surveys to estimate krill biomass require that sound backscattered by krill be identified and distinguished from all other types of backscatter. Traditionally this has been achieved by sampling characteristic types of acoustic target with nets. More recently partitioning of

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

3. Variation in the distribution of Antarctic krill Euphausia superba around South Georgia

   Abstract:  Between 1980 and 1997 British Antarctic Survey carried out 11 cruises in the region of South Georgia. Here we summarize the length-frequency distributions of krill caught on each of these cruises and look particularly at differences between krill taken from the eastern and western ends

   Meeting Document : WG-EMM-97/47 : Autor(es): Daly, H.I., Murray, A.W.A., Watkins, J.L.

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

   Abstract:  Stratified random acoustic surveys, each comprising 10 parallel transects, were conducted within two 80 x 100 km areas over the shelf-break to the north-east and north-west of South Georgia during December/January 1996/97. Netting suggested that the mean lengths of krill within the

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

5. Krill biomass and distribution in Subarea 48.2 during summer 1996

   Abstract:  The results of hydroacoustic survey of krill biomass assessment in Subarea 48.2 adjacent to Coronation Island, carried out in February-March 1996 in Russian RN "ATLANTNIRO" are presented. Taking in account close relation of krill and oceanographic structure of waters and

   Meeting Document : WG-EMM-97/49 : Autor(es): Kasatkina, S.M., Abramov, A.M., Polischuk, M.I., Sushin, V.A.

6. Distribution of Soviet commercial fleet at krill fishery in the South Orkneys subarea (Subarea 48.2) during 1989/90

   Abstract:  The results of analysis of haul by haul catch statistics of Soviet commercial fleet during 1989/90 season (totally 3614 hauls for the period from 1.11.1989 to 12.06.1990 are presented. Actually during the whole season fishing vessels worked in one fishing ground off the north-western

   Meeting Document : WG-EMM-97/50 : Autor(es): Sushin, V.A.

7. Assessment of fishing intensity of krill in Subarea 48.2 during the season of 1989/90

   Abstract:  The research performed was aimed at assessment of fishing fleet impact upon krill population during the months (December-March), being critical to dependent species. The results of fishing intensity estimation are presented on the basis of haul to haul commercial statistics for Russian

   Meeting Document : WG-EMM-97/51 : Autor(es): Ivanova, V.I., Sushin, V.A., Kasatkina, S.M.

8. Variation in echosounder calibration with temperature and some possible implications for acoustic surveys of krill biomass

   Abstract:  Accurate estimation of krill biomass by acoustic techniques is dependant upon a number of factors including, fundamentally, accurate echo-sounder calibration. The Simrad EK500 scientific echo-sounder used aboard RRS James Clark Ross is regularly calibrated at South Georgia before and

   Meeting Document : WG-EMM-97/52 : Autor(es): Watkins, J.L., Woodroffe, P., Brierley, A.S., Goss, C.

9. Spatial and temporal distribution of krill Euphausia superba biomass in the Ross Sea (1989/90, 1994/95)

   Abstract:  The paper, based on the results of italian expeditions to the Ross Sea (December 1989- Januar 1990 and November- December 1994), presents how is spatial and temporal distribution of krill biomass and what is its value. The hydroacoustic observations were done in the time when

   Meeting Document : WG-EMM-97/53 : Autor(es): Kalinowski, J., Azzali, M.

10. Acoustic discrimination of southern ocean zooplankton

    Abstract:  Acoustic surveys in the vicinity of the sub-Antarctic island of South Georgia revealed the existence of a number of horizontally extensive yet vertically discrete scattering layers in the upper 250 m of the water column. These layers were fished with a LonghurstHardy plankton recorder

    Meeting Document : WG-EMM-97/54 : Autor(es): Watkins, J.L., Brierley, A.S., Goss, C., Ward, P.

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