论文信息 - Acoustical Detection of High-Density Krill Demersal Layers in the Submarine Canyons off Georges Bank

Acoustical Detection of High-Density Krill Demersal Layers in the Submarine Canyons off Georges Bank

High-density demersal layers of krill have been detected in the submarine canyons off Georges Bank by means of a high-frequency, dual-beam bioacoustical technique. Krill densities in these demersal layers were observed to be two to three orders of magnitude greater than the highest densities observed in water-column scattering layers. Such abundances may help explain the unusually high squid and demersal fish production estimates attributed to the Georges Bank ecosystem.

[1] D. E. Gaskin,et al. Daytime surface swarming by Meganyctiphanes norvegica (M. Sars) (Crustacea, Euphausiacea) off Brier Island, Bay of Fundy" , 1979 .

[2] J. Isaacs,et al. Migrant Sound Scatterers: Interaction with the Sea Floor , 1965, Science.

[3] R. W. Sheldon,et al. Population densities of euphausiids off Nova Scotia as indicated by net samples, whale stomach contents, and sonar , 1978 .

[4] K. Richter,et al. Acoustic determination of small-scale distributions of individual zooplankters and zooplankton aggregations , 1985 .

[5] R. Macdonald. Food and Habits of Meganyctiphanes norvegica , 1927, Journal of the Marine Biological Association of the United Kingdom.

[6] S. Nicol. Population structure of daytime surface swarms of the euphausiid Meganyctiphanes norvegica in the Bay of Fundy , 1984 .

[7] R. Gilcher. Human retroviruses and AIDS. , 1988, The Journal of the Oklahoma State Medical Association.

[8] D. Holliday,et al. Acoustic measurements of zooplankton distributions in the sea , 1984 .