Some aspects of krill acoustic sampling

• Autorzy: Gorska G.
• Konferencja: International Symposium on HYDROACOUSTICS AND ULTRASONICS EAA Symposium (formerly 13th FASE Symposium) Gdańsk-Jurata, 12-16 May 1997
• Języki publikacji: EN

Abstrakty

EN

In this paper the coherent structure of the first-order scattered signal is analysed and the influence of orientation distribution form on the signaI energy is studied in the case of dense krill aggregation. In large krill concentration case the errors in krill abundance estimation due to neglecting of coherent addition of echoes are evaluated. The importance of consideration of the orientation distribution shape in krill abundance estimation is shown.

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 1997
• Tom: Vol. 1
• Strony: 27--30
• Opis fizyczny: Bibliogr. 11 poz., rys.

Twórcy

autor

Gorska G.

• lnstitute of Oceanology, ul. Powstańców Warszawy 55, 81-712 Sopot, Poland

Bibliografia

• 1. Hewitt R.P., D.A. Demer, (1996), Management of the Antarctic krill resource: the role of acoustic sampling, Workshop on Marine Bio-Acoustic Techniques and Their Applications, India, 32 - 35.
• 2. Kalinowski J., Z. Witek, (1985), Biological elements and krill aggregation forms, Studia i Materiały, seria B, 52, 5 - 146 (in Polish).
• 3. Andreeva I.B., A.V Belousov, (1996), Multiple sound scattering by densely packed shoals of marine animals, ICES Journal of Marine Science, 53, 323 - 327.
• 4. Andreeva I.B., A.V Belousov, G.F. L'vovskaya, L.L. Tarasov, (1994), Acoustical properties of dense oceanie pelagian c1usters, Acoustical Physics, 40, 5 - 12.
• 5. Sun Z, G. Gimenez, (1992), Evaluation of interference effect in the energy investigation of echoes scattered by an uncorrelated planar distribution of spherical targets, J. Acoust. Soc. Am., 92, 3259 - 3270.
• 6. Sun Z., G. Gimenez, (1994), Influence of target cornposition on the relationship between echo energy and target quantity, J. Acoust Soc. Am., 96, 3080 - 3087.
• 7. Gorska N., (1996), The role of the interference effects of waves scattered at individual targets in the plankton echosounding, Third European Conference on Underwater Acoustics, Crete, 105 - 110.
• 8. Stanton T.K., D. Chu, P.H. Wiebe, C.S. Clay, (1993), Average echoes from randornly oriented random-Iength finite cylinders: Zooplankton models, J Acoust. Soc Am., 94, 3436 - 3472.
• 9. Miyashita K, l. Aoki, T. lnagaki, (1996), Swimming behaviour and target strength of isada krill (Euphausia pacifica), ICES Journal of Marine Science, 53, 303 - 308.
• 10. Green C.H., T.K. Stanton, P.H. Wiebe, S. McClatchie, (1991), Acoustic estimates of Antarctic krilI, Nature, 349, 110.
• 11. Macaulay M.C., (1994), A generalised target strength model for euphausiids, with applications to other zooplankton, J. Acoust. Soc. Am., 95, 2452 - 2466.