Green turtle and fish identification based on acoustic target strength

(1) Sunardi Sunardi Mail (Universitas Ahmad Dahlan, Indonesia)
(2) Azrul Mahfurdz Mail (Sultan Ahmad Shah Polytechnic, Malaysia)
(3) * Shoffan Saifullah Mail (Universitas Ahmad Dahlan, Indonesia)
*corresponding author


Abstract


Fisherman accidently caught sea turtles in their fishnet. It could be dangerous for its population. This study measures the turtle target strength (TS) using modified echosounder. The result could be used to improve the efficiency of turtle repellent device. The experiment conducted in a hatchery fiber tank contained saline water. The Green were 1, 3, 12 and 18 years old. The study used three species of fish to ensure there are no overlapped value between fish and sea turtle. TS of the animals were calculated incorporating reference targets (sphere). The echo power of the turtle was compared with the solid steel sphere which is confirmed good agreements with the theoretical values. The echo power reference by applying Fast Fourier Transform (FFT) analysis has been used in calculating TS of the animal. From the echo evaluation in time domain at different angles, it is obviously shown that echo signal structure is different between the parts of turtle body. This study reveals that high echo strength is acquired from the carapace and the plastron parts the finding also showed that there are significant differences between 3, 12, 18 years old turtles and fish in every angle measurement.

Keywords


Target Strength (TS); Green Turtle; Echo Power; Fast Fourier Transform (FFT); Acoustic Measurement

   

DOI

https://doi.org/10.26555/ijain.v4i1.147
   

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References


Jordan, L.K., Mandelman, J.W., McComb, D.M., Fordham, S.V., Carlson, J.K. and Werner, T.B. Linking sensory biology and fisheries bycatch reduction in elasmobranch fishes: a review with new directions for research. Conservation Physiology. Oxford University Press, 2013.

Bull, L.S. A review of methodologies for mitigating incidental catch of seabirds in New Zealand fisheries. Science & Technical Publishing Department of Conservation, 2007.

Lokkeborg, S. Best practices to mitigate seabird bycatch in longline, trawl and gillnet fisheries-efficiency and practical applicability. Marine Ecology Progress Series. 2011; 435:285-303.

Stone, G.S., Cavagnaro, L., Hutt, A., Kraus, S., Baldwin, K. and Brown, J. Reactions of Hector’s dolphins to acoustic gillnet pingers. Sciences & Research Unit, Science Technology and Information Services, Department of Conservation, Welington, New Zealand, 2000.

Cox, T.M., Read, A.J., Swanner, D., Urian, K. and Waples, D. Behavioral responses of bottlenose dolphins, Tusiops truncates, to gillnets and acoustic alarms. Biological Conservation. 2003;115: 203-212.

Gazo, M., Gonzalvo, J. and Aguilar, A. Pingers as deterents of bottlenose dolphins interacting with trammel nets. Fisheries Research. 2008;92: 70-75.

Berggren, P., Carlstrom, J. and Tregenza, N. Mitigating of small cetacean bycatch; evaluation of acoustic alarms (MISNET). Final Report to the European Commission. 00/031. 2002.

Valdemarsen, J.W. and Suuronen, P. Modifying fishing gear to achieve ecosystem objectives. Conference on Responsible Fisheries in the Marine Ecosystem, Iceland. 2001.

Gilman, E., Gearhart J., Price B., Eckert S., Miliken H., Wang J., Swimmer Y., Shiode D., Abe O., Peckham S.H., Chaloupka M., Hall M., Mangel J., Shigueto J.A., Palzell P., and Ishizaki A. Mitigating sea turtle by catch in coastal passive net fisheries. Fish and Fisheries. 2010;11: 57-88.

Lewisson, R.L., Crowder, L.B. and Sharer, D.J. The impact of turtle excluder devices and fisheries closures on Loggerhead and Kemp’s Ridley stranding in the Western Gulf of Mexico. Conservation Biology. 2003;17(4):1089-1097.

Epperly, S.P. The Biology of Sea Turtles. Volume II. National Marine Fisheries Service. CRC Press LLC. 2003.

Gallaway, B.J. and Cole, J.G. Shrimp loss associated with turtle excluder devices: are the historical estimates statistically biased. North American Journal of Fisheries Management. 2008;28: 203-211.

Lenhardt, M.. Sea turtle auditory behavior.Abstract. J. Acoust. Soc. Am. 2002;112(5):2314

Yudhana, A. Turtle Hearing Classification for Turtle Excluder Devices Design. Ph.D Thesis. Universiti Teknologi Malaysia, Malaysia; 2011.

Chu, D. Technology evolution and advances in fisheries acoustics. Journal of Marine Science and Technology. 2011;19(3):245-252.

Lurton, X. and DeRuiter, S.. Sound radiation of seafloor mapping echosounders in the water column, in relation to the risk posed to marine mammals. International Hydrographic Review. Pp. 7-17. 2011.

Maclennan, D.N. and Simmonds, E.J. Fisheries acoustics. London: Chapman & Hall. 1992.

Abe, K., Sadayasu, K., Sawad, K., Ishii, K. and Takao, Y. Precise target strength measurement and morphological observation of juvenile Walleye Pollock (Theragra Chalcogramma). MTTS/ IEEE TECHNO – OCEAN ’04, 2004;1:370-374

Benoit Bird, K.J. and Au, W.W.L. Echo strength and density structure of Hawaiian Mesopelagic boundary patches. J. Acoust. Soc. Am. 2003; 114(4): 1888 -1897.

Frouzova, J. and Kubecka, J. Changes of acoustic target strength during juvenile Perch development. Fisheries Research. 2004; 66: 355-361.

W.W.L. Au, and K.J. Benoit Bird, “Acoustic backscattering by Hawaiian lutjanidsnappersl.” J. Acoust. Soc. Am. 2003; 114(5).

Stanton, T.K. and Chu, D. Review and recommendations for the modeling of acoustic scattering by fluid like elongated zooplankton: Euphausiids and Copepods. ICES Journal of Marine Science. 2000; 57:793-807.

Amakasu, K. and Furusawa, M. Effective frequency for acoustic survey of Antarctic Krill. MTTS/IEEE TECHNO – OCEAN ’04, 2004;1:375-382.

Foote, K.G.. Important of the swimbladder in acoustic scattering by fish : A comparison of Gadoid and Mackerel target strengths. J. acoust. Soc. Am. 1980;67(6): 2084 - 2089.

Sunardi, Yudhana, A., Din J. and Hassan, R.B.R. Swimbladder on fish target strength. TELKOMNIKA. 2008;6(1): 57-62.

Jorgensen, R. and Olsen, K. Acoustic target strength of Capelin measured by single target tracking in a controlled cage experiment. ICES Journal of Marine Science. 2002;59: 1081-1085.

Miller, J.H. and Potter, D.C.Active high frequency phased array sonar for whale shipstrike avoidance : target strength measurements. MTS/IEEE Conference and Exhibition, 2001;4: 2104-2107.

Benoit Bird, K.J. and Au, W.W.L. Prey dynamics affect foraging by a pelagic predator (Stenella Longirostris) over a range of spatial and temporal scales. Behavior Ecology Sociobiology. 2003;53: 364-373.

Stanton T.K. On acoustic scattering by a shell covered seafloor. J. Acoust. Soc. Am. 2000;108(2): 551-555.

Benoit Bird, K.J. and Au, W.W.L. Target strength measurements of Hawaiian Mesopelagic boundary community animals. J. Acoust. Soc. Am. 2001;110(2):812-819.

Mukai, T., Lida, K., Ando, Y., Mikami, H., Maki, Y. and Matsukura, R. Measurements of swimming angles, density and sound speed of the krill Euphausia Pacifica for target strength estimation. MTTS/IEEE TECHNO -OCEAN ’04, 2004;pp. 383-388.

Warren, J.D., Stanton, T.K., McGehee, D.E. and Chu, D. Effect of animal orientation on acoustic estimates of zooplankton properties. IEEE Journal of Oceanic Engineering. 2002;27:130-138.

Drew A.W. Initial results from a portable dual beam sounder for in situ measurements of target strength of fish. OCEANS’80 1980; 376 – 380.

Jech J.M., Chu D., Foote K.G., Hammar T.R., Huffnagle L.C. Jr.Calibrating two scientific echo sounders, OCEANS Proceedings 2003; 3: 1625 – 1629

Foote K.G. & D.N. Maclennan.Comparison of copper and tungsten carbide calibration spheres. J. Acoust. Soc. Am. 1984; 75 (2): 612 - 616

Arnaya, N. Sano, N. and Lida, K. Studies on acoustic target strength of squid. I. Intensity and energy target strength. Bull. Fac. Fish. Hokkaido Univ. 1988;39(.3):187-200.

Benoit Bird, K.J. and Au, W.W.L. Target strength measurements of Hawaiian Mesopelagic boundary community animals. J. Acoust. Soc. Am. 2001;110(2):812-819.

Simmonds, E. J., and MacLennan, D. N. Fisheries Acoustics: Theory and Practice, 2nd edn. Blackwell Publishing, Oxford. 2005.

Sarangapani S, Miller J.H, Potty G.R, Reeder D.B, Stanton T.K, Chu D, Measurements and modeling of the target strength of divers, Oceans 2005 – Europe, vol. 952, 2005; pp. 952 – 956.

MacLennan, D. N. The theory of solid spheres as sonar calibration targets. Scottish Fisheries Research Report. 25. pp 17. 1982.

Hodges, R.P. Underwater acoustic: analysis, design, and performance of sonar. Singapore: John Wiley and Sons. 2010.

Nakken, O. and Olsen, K. Target strength measurements of fish. Rapports et Procès-Verbaux des Réunions Conseil International pour l'Exploration de la Mer. 1977;170: 52-69.

Kalinowski, J. Dyka, A. and Kilian, L. Target strength of krill. Polish Polar Research. 1980;1(4):147-153.

Arnaya, N. Sano, N. and Lida, K. Studies on acoustic target strength of squid. I. Intensity and energy target strength. Bull. Fac. Fish. Hokkaido Univ. 1988; 39(3):187-200.

Urick, R.J. Principles of underwater sound. 3rd ed. USA: McGraw-Hill. 1983.




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