Resultados de la búsqueda

1. Effects of variability in prey abundance on reproduction and foraging in chinstrap penguins (Pygoscelis antarctica)

   contend with large interannual fluctuations in prey availability and hence the cost of chick provisioning ... . Adults faced with this uncertainty can mechanistically balance parental care by adopting a strategy ... , 1991 and 1992, respectively) and was correlated with annual measures of breeding adult body weight and ... in response to decreases in prey abundance in a manner consistent with predictions of life-history ...

   Meeting Document : WG-EMM-06/P6 : Autor(es): D.A. Croll, D.A. Demer, R.P. Hewitt, J.K. Jansen, M.E. Goebel and B.R. Tershy (USA)

2. Seabird avoidance measures for small Alaskan longline vessels

   16.8 m and with infrastructure (a 45-m streamer line with a minimum aerial distance of 20 m) was ... achievable and practical regardless of vessel size, especially with a lighter streamer line design. However ... , the current requirement for small vessels using fixed gear of a single streamer line with no mandatory ...

   Meeting Document : WG-FSA-05/36 : Autor(es): E.F. Melvin and M. Wainstein (USA)

3. ASSESSMENT OF PATAGONIAN TOOTHFISH POPULATION IN THE NORTH OF SUBAREA 48.4 USING DATA FROM A FOUR-YEAR TAGGING EXPERIMENT

   early closure of the fishery with only 58.9 t of the 75 t TAC of D. eleginoides taken; 2. The target ... tagging rate of 5 fish per tonne was exceeded by both vessels, with 344 D. eleginoides tagged and released ... 48.4 and 48.3. 8. CASAL estimates of D. eleginoides population size in the North of 48.4 agree with ... simple Petersen and local CPUE estimates, with a B0 of 1143 t and B2009/B0 of 85%. 9. The sustainable ...

   Meeting Document : WG-FSA-09/17 : Autor(es): J. Roberts and D.J. Agnew (United Kingdom)

4. Analysis of the diet of Champsocephalus gunnari in Subarea 48.3, in late summer of years 1994–97, Dr E. Holmberg surveys

   with/without food in the area of investigation didn't show a consistent pattern from year to year ... , phenomenon for which non consistent explanation was found. The variation of the diet with respect to the ... abundance; and high in 1946 and 1997, in line with the years of krill richness. This information is well in ... accord with independent information from acoustic surveys and krill dependent species monitored in the ...

   Meeting Document : WG-FSA-97/48 : Autor(es): Barrera-Oro, E., Marschoff, E., Casaux, R.

5. Preliminary results on by-catch of fishes caught by the fishery vessel Chiyo Maru No. 3 to the north of the South Shetland Islands (February to March, 1996)

   in 41 hauls. Notothenioid juveniles were found in 30 hauls carried out in waters with a depth of 87 ... in 11 hauls operated at some distance from the shelf, in the offshore waters with a depth of 275 ... -1780m (average 1006m). Notothenioid juveniles never caught with bathypelagic fish species in all hauls ... occurred in hauls with lower krill CPUE. Author(s):  Ichii, T., Kawaguchi, S., Naganobu, M. Title ...

   Meeting Document : WG-EMM-96/52 : Autor(es): Ichii, T., Kawaguchi, S., Naganobu, M.

6. Zooplankton target strength: volumetric or areal dependence?

   kHz and I MHz data were collected with a dual-beam sonar system and the 200 kHz data with a split-beam ... system. Experiments were conducted with live, tethered individuals in an enclosure filled with filtered ...

   Meeting Document : WG-Krill-94/13 : Autor(es): D.A. Demer and L.V. Martin (USA)

7. Otolith elemental signatures reveal habitat shift of Electrona carlsbergi

   . carlsbergi hatched in two different areas, E. carlsbergi with Type I otolith could hatched in the oceanic ... across different fronts into the Antarctic waters from the warmer waters after age 1. E. carlsbergi with ... sub-Antarctic Front into the open waters (oceanic regions of APFZ) with the influence of eastward ... , otolith elemental signature analysis with coupling to water chemistry can be useful to ascertain migration ...

   Meeting Document : WG-FSA-17/65 : Autor(es): L. Wei and G.P. Zhu

8. Is current management of the Antarctic krill fishery in the Atlantic sector of the Southern Ocean precautionary?

   new, precautionary assessment of exploitation rate in this fishery. The effective regional catch limit ...

   Meeting Document : WG-EMM-16/21 : Autor(es): S. Hill, A. Atkinson, C. Darby, S. Fielding, B. Krafft, O.R. Godø, G. Skaret, P. Trathan and J. Watkins

9. Progress towards validation of ageing of Dissostichus eleginoides using otoliths

   , fish have been treated with strontium to mark their otoliths for validation of subsequent age ... annuli on the otoliths after the strontium mark was consistent with the time at liberty of the fish after ... marking. Current and future work on age validation is designed to address outstanding problems with age ...

   Meeting Document : WG-FSA-04/67 : Autor(es): K. Krusic-Goluband R. Williams (Australia)

10. Effect of missing modes on calibration sphere target strengths (ICES CM 1996/b: 37, Fish Capture Committee)

    hypothesis is investigated in the context of reported experimental calibration trials with the SIMRAD EK500 ... tungsten carbide with 6% cobalt binder. Theoretical target strengths are computed for each sphere for the ... computed target strengths are compared with the corresponding experimental values. The working hypothesis ...

    Meeting Document : WG-EMM-96/46 : Autor(es): Foote, K.G.

Páginas