The statistics of fish echo traces - models and validation

• Autorzy: Moszynski M. , Stepnowski A.
• Konferencja: 17 th Symposium on Hydroacoustics (23-26.05.2000; Jurata; Polska)
• Języki publikacji: EN

Abstrakty

EN

Beam pattern probability density function (PDF) plays important role in indirect fish target strength estimation methods as it constitutes the kernel of any form of a "single-beam integral equation" that should be solved for unknown target strength PDP. Typically, the beam pattern PDF is calculated under the assumption of uniform spatial distribution of fish targets in beam pattern cross-section. However, in some cases this assumption can not be justified due to fish or vessel movement, and different number of fish echoes in fish traces. In the paper, two different models of fish traces statistics were investigated: one assuming the vessel movement with stationary fish and the other with stationary vessel and moving fish. Both approaches were modelled numerically and later verified experimentally using data obtained from a dual-beam system.

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 2000
• Tom: Vol. 3
• Strony: 155--160
• Opis fizyczny: Bibliogr. 2 poz., rys.

Twórcy

autor

Moszynski M.

• Technical University of Gdansk, ul. Narutowicza 11/12, 80-952 Gdansk, Poland

autor

Stepnowski A.

• Technical University of Gdansk, ul. Narutowicza 11/12, 80-952 Gdansk, Poland

Bibliografia

• 1. R. Kieser, T.J. Mulligan, Analysis of echo counting data: a model, Can. J. Fish Aquat. Sci., Volume (41), pp. 451-458,1984.
• 2. A. Stepnowski, Comparison of Novel Inverse Techniques for Fish Target Strength Estimation, In Proceedings of the Fourth European Conference on Underwater Acoustics, Volume 1, pp. 187-192, 1998.