Search results

1. Measurements of differences in the target strength of Antarctic krill (Euphausia superba) swarms at 38 kHz and 120 kHz

   of the sounders (see Methods section), a corss-calibration error as large as 7 dB is considered to be highly ... measurements into Greenlaw's (1979) fluid sphere scattering cross-section model, was 4.2 dB (Event 17 ... . The morphological features of a super-swarm ofkrill, Euphausia superba. Mem. Natl. Inst. Polar Res. Spec. Issue 27 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 75–86 : Author(s): Hampton, I.

2. Target strength studies on Antarctic silverfish (Pleuragramma antarcticum) in the Ross Sea

   ). The expected back- scattering cross-section (m2) of the mean fish TL for each length class was calculated from ... manual (Simrad, 1993). The backscattering cross-section of the fish σbs was calculated by equation ... of the sectional views measured from the reference point (the nose) at dif- ferent coordinate x and all dimensions ... /λ), the asymptotic upper limit of the acoustic cross-section of an ellipsoid (σbody), approximating the fish body ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 75–104 : Author(s): Azzali, M., I. Leonori, I. Biagiotti, A. De Felice, M. Angiolillo, M. Bottaro and M. Vacchi

3. Do krill and salps compete? Contrary evidence from the krill fisheries

   The results of the analysis of deviance (Table 1) show that each factor and interaction is statistically ... and increasing salp density even over several orders of magnitude. This suggests that direct interaction ... the month:area:sea- surface temperature interaction was larger than from the month:area interaction (Table ... for primary production between krill and salps. If this is so, there must be interaction between salp ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 205–216 : Author(s): Kawaguchi, S., T. Ichii, M. Naganobu and W.K. de la Mare

4. A review of data on abundance, trends in abundance, habitat use and diet of ice-breeding seals in the Southern Ocean (submitted to the 2008 Joint CCAMLR-IWC Workshop)

   the sampled regions to the entire pack-ice. Given these issues, the acknowledged guesswork underlying Laws ... relating to this issue is unclear. (iv) Uncertainty or precision. Large-scale surveys of wildlife ... the interaction between the reliance of seals on regions of high zooplankton abundance (e.g. near the bottom ... ., 2001; Sato et al., 2002; Hindell et al., 2002; Davis et al., 2003; Watanabe et al., 2003; Fuiman et ...

   Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 49–74 : Author(s): Southwell, C., J. Bengtson, M. Bester, A.S. Blix, H. Bornemann, P. Boveng and M. Cameron, J. Forcada, J. Laake, E. Nordøy, J. Plötz, T. Rogers, D. Southwell, D. Steinhage, B.S. Stewart and P. Trathan

5. Characteristics of seasonal variation in diurnal vertical migration and aggregation of Antarctic krill (Euphausia superba) in the Scotia Sea, using Japanese fishery data

   ) in August (Figure 4). Trawling depth in February was con- siderably deeper than in January and March in SO ... m) in August but it shifted to a shallower depth (87 m (±1.0 m)) in September. Average CPUE in relation ... June 16.4 42.6 33.1 1.4 2.1 2.3 July 83.3 24.5 1.9 2.2 August 35.5 1.8 September 31.8 2.5 ... , but decreased after February and was at its lowest level (0.17) from April to August (Figure 5). In SO ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 163–172 : Author(s): Taki, K., T. Hayashi and M. Naganobu

6. Is the attempt to estimate the biomass of Antarctic fish from a multi-species survey appropriate for all targeted species? Notothenia rossii in the Atlantic Ocean sector – revisited

   ., 1991, 1992, 1994, 2000, 2002; Jones et al., 1998, 2000, 2001, 2003; Kock, 1991, 1998; Kock et al ... al., 1998, 2001, 2003; Kock, 1991, 1998; Kock et al., 2002). Consequently, biomass estimates ... in 1998 and 2001–2003 (Jones et al., 1998, 2001, 2003; Kock et al., 2002). These surveys were conducted ... seen on the Elephant Island shelf (Jones et al., 1998, 2001, 2003; Kock, 1986, 1998; Kock et al ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 141–153 : Author(s): Kock, K.-H., M. Belchier and C.D. Jones

7. Marine debris and fishing gear associated with seabirds at sub-Antarctic Marion island, 1996/97 and 1997/98: in relation to longline fishing activity

   ranges, as well as the level of interaction between these species and sources of marine debris (e.g ... . unregulated fishing vessels). The interaction of procellariiformes with longline fishing vessels has been ... operations, this interaction was almost certainly with the toothfish vessels operating around Marion Island ... , P.S. Rubilar and C.A. Moreno. 1995. Seabird interaction with longlining operations ...

   Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 85–96 : Author(s): Nel, D.C. and J.L. Nel

8. An alternative method for estimating the level of illegal fishing using simulated scaling methods on detected effort

   and examined. The discussion section of the paper suggests methods for incorporating uncertainty ... is low, the issue of evasion increases in importance. With evasion levels of 0.2 and 0.5 in simulations ... would increase the level of coverage that could be assumed, although it would raise further issues ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 143–161 : Author(s): Ball, I

9. Distribution and size of Antarctic krill (Euphausia superba Dana) in Polish commercial catches taken in the Atlantic sector of the Southern Ocean from 1997 to 1999

   reference table (CCAMLR, 2001b). All hauls completed before or up to 10 min after dawn or dusk were ... were taken (CCAMLR, 2001a; Litvinov et al., 2001). Jackowski 86 Density of Commercial Krill ... , 2001a). The mean density of krill concentrations from 1997 to 1999 varied from 663 to 1 215 specimens ... sector confi rm this phenomenon (CCAMLR, 2001a), and also indicate that catches in different areas ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 83–105 : Author(s): Jackowski, E

10. Length-based assessment for mackerel icefish (Champsocephalus gunnari) at South Georgia

    the given harvest control rule to set a two-year total allowable catch (TAC). One issue is the accurate ... to set a two-year total allowable catch (TAC). One issue is the accurate identification of age cohorts ... issue is the accurate identification of age cohorts from the survey data. In this paper a length-based ... when there are issues separating cohorts that have different birthdays: in an age-structured ... in certain regions, this approach was not considered viable. Given these data availability issues ... for moving to a length- based framework was to avoid the issues with the identification of known-age cohorts ...

    Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 129–137 : Author(s): Hillary, R.M., C.T.T. Edwards, R.E. Mitchell and D.J. Agnew

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