Determining the target strength bambood wrasse (Pseudolabrus japonicus) using Kirchhoff-ray mode
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초록
Although ex situ target strength (TS) measurements using dual- and split-beam systems have become the primary approach of estimating fish abundance, theoretical model estimation is a powerful tool for verifying the measurements, as well as for providing values when making direct measurements is difficult. TS values for 20 samples of live bambooleaf wrasse (Pseudolabrus japonicus) whose target length (TL) ranged between 13.7 and 21.3 cm were estimated theoretically using the Kirchhoff-ray mode model, and the TS values for 18 live fish samples were additionally measured at ~0º tilt angle to the swimming aspect using a tethered method at a frequency of 120 kHz to verify the theoretical values. The digitizing intervals used to extract the fish body and swim bladder morphology in the X-ray photographs significantly affected the calculated TS patterns, but variations based on the speed of sound and density ratio values for the general range of fish flesh were relatively small (within 1 dB). Close agreement was observed between the measured and theoretical TS values, and the correlation between the average TS and body length of the fish could be calculated accurately as <TS120kHz>= 20logTL (cm) –71.6 using the theoretical method.
Abstract
Although ex situ target strength (TS) measurements using dual- and split-beam systems have become the primary approach of estimating fish abundance, theoretical model estimation is a powerful tool for verifying the measurements, as well as for providing values when making direct measurements is difficult. TS values for 20 samples of live bambooleaf wrasse (Pseudolabrus japonicus) whose target length (TL) ranged between 13.7 and 21.3 cm were estimated theoretically using the Kirchhoff-ray mode model, and the TS values for 18 live fish samples were additionally measured at ~0º tilt angle to the swimming aspect using a tethered method at a frequency of 120 kHz to verify the theoretical values. The digitizing intervals used to extract the fish body and swim bladder morphology in the X-ray photographs significantly affected the calculated TS patterns, but variations based on the speed of sound and density ratio values for the general range of fish flesh were relatively small (within 1 dB). Close agreement was observed between the measured and theoretical TS values, and the correlation between the average TS and body length of the fish could be calculated accurately as <TS120kHz>= 20logTL (cm) –71.6 using the theoretical method.
참고문헌 (26)
- Beverton RJH, "Small pelagic fish and the threat of fishing;are they endangered?", J Fish Biol, 37(Supplement A), pp.5~16 (1990)[DOI]
- Blaxter JHS, "Swim-bladder "behaviour" and target strength", Rapp. P.-v. Réun Cons int Explor Mer, 189, pp.233~244 (1990)
- Clay CS, "Low-resolution acoustic scattering models : fluid-filled cylinders and fish with swim-bladders", J Acoust Soc Am, 89, pp.2168~2179 (1991)[DOI]
- Clay CS, "Composite ray-mode approximations for backscattered sound from gas-filled cylinders and swim-bladders", J Acoust Soc Am, 92, pp.2173~2180 (1992)[DOI]
- Clay CS, "Acoustic models of fish : The Atlantic cod(Gadus Morhua)", J Acoust Soc Am, 96, pp.1661~1668 (1994)[DOI]
- Farrant J, "Structural and functional aspects of biological freezing techniques", J Microsc, 111, pp.17~34 (1977)[DOI]
- Foote KG, "Rather-high-frequency sound scattering by swimbladdered fish", J Acoust Soc Am, 78, pp.688~700 (1985)[DOI]
- Foote KG, "Fish target strengths for use in echo integrator surveys", J Acoust Soc Am, 82, pp.981~987 (1987)[DOI]
- Foote KG, "Comparison of walleye pollock target strength estimates determined from in situ measurements and calculations based on swim-bladder form", J Acoust Soc Am, 83, pp.9~17 (1988)[DOI]
- Hazen EL, "Comparing the modelled and measured target-strength variability of walleye pollock, Theragra halcogramma", ICES J Mar Sci, 61, pp.363~377 (2004)[DOI]
- Horne JK, "Multi-frequency estimates of fish abundance : constraints of rather high frequencies", ICES J Mar Sci, 56, pp.184~199 (1999)[DOI]
- Horne JK, "Comparing acoustic model predictions to in situ backscatter measurements of fish with dual-chambered swim-bladders", J Fish Biol, 57, pp.1105~1121 (2000)[DOI]
- Horne JK, "Sounds in the Sea:From Ocean Acoustics to Acoustical Oceanography", pp.374~397 (2005), Academic
- Jech JM, "Application of three sound-scattering models to threadfin shad(Dorosoma petenense)", J Acoust Soc Am, 98, pp.2262~2269 (1995)[DOI]
- Kang D, "Ex situ target strength of rockfish(Sebastes schlegeli)and red sea bream(Pagrus major)in the Northwest Pacific", ICES J Mar Sci, 60, pp.538~543 (2003)[DOI]
- Kim YU, "The Marine Fishes of Korea", pp.382~ (2001), Hanguel
- Koumoundouros G, "Effects of three preservation methods on the evolution of swim-bladder radiographic appearance in sea bass and sea bream juveniles", Aquaculture, 182, pp.17~25 (2000)[DOI]
- Love RH, "Measurements of fish target strength : a review", Fish Bull, 69, pp.703~715 (1971)
- MacLennan DN, "Acoustical measurement of fish abundance", J Acoust Soc Am, 87, pp.1~15 (1990)
- MacLennan DN, "Fisheries Acoustic Theory and Practice", pp.429~ (2005), Blackwell Science
- Medwin H, "Fundamentals of acoustical oceanography", pp.712~ (2005), Academic Press
- Nakken O, "Target strength measurements of fish", Rapp. P.-v. Réun Cons int Explor Mer, 170, pp.53~69 (1977)
- Ona E, "Physiological factors causing natural variations in acoustic target strength of fish", J Mar Biol Ass UK, 70, pp.107~127 (1990)[DOI]
- Sawada K, "Target strength measurements and modeling of walleye pollock and pacific hake", Fish Sci, 65, pp.193~205 (1999)
- Stanton TK, "Sound scattering by cylinders of finite length. III. Deformed cylinders", J Acoust Soc Am, 86, pp.691~705 (1989)[DOI]
- Thiebaux ML, "An analytical model of acoustic fish reflection for estimation of maximum dorsal aspect target strength", Can J Fish Aquat Sci, 48, pp.1772~1782 (1991)[DOI]