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A digital stereo-video camera system for three-dimensional monitoring of free-swimming Pacific bluefin tuna, Thunnus orientalis, cultured in a net cage

  • Shinsuke Torisawa (a1), Minoru Kadota (a1), Kazuyoshi Komeyama (a2), Katsuya Suzuki (a3) and Tsutomu Takagi (a1)...

Abstract

We used a digital stereo-video camera system for three-dimensional monitoring of cultured Pacific bluefin tuna, Thunnus orientalis, swimming freely in a net cage. We estimated the fork length and length frequency distribution of individual fish using the direct linear transformation (DLT) method. Information obtained from stereo images is useful for managing the growth of tuna during rearing. Our aim was to develop a simple method involving a combination of DLT and commercial image-processing software to enable aquaculturists to obtain three-dimensional measurements of fish. In this study, we used a stereo-video camera system to evaluate the precision and validity of fish size estimates determined from repeated measurements. Of the total assessed individuals swimming within a distance of  <5.5 m from the camera system, estimates for 99% (106/107) were found to be valid, with an error ratio (standard error/mean) of  <5%. Therefore, we believe that our proposed simple method for monitoring free-swimming fish could be very useful for aquaculture management.

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Corresponding author

a Corresponding author: ns_torisawa@nara.kindai.ac.jp

References

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[1] Adbel-Aziz Y.I., Karara H.M., 1971, Direct linear transformation from comparator coordinates into object space in close-range photogrammetry. ASP Symp. Proc. on Close-Range Photogrammetry, American Society of Photogrammetry, Falls Church, pp. 1–18.
[2]Costa, C., Loy, A., Cataudella, S., Davis, D., Scardi, M., 2006, Extracting fish size using dual underwater cameras. Aquac. Eng. 35, 218227.
[3]Costa, C., Scardi, M., Vitalini, V., Cataudella, S., 2009, A dual camera system for counting and sizing Northern Bluefin Tuna (Thunnus thynnus Linnaeus, 1758) stock, during transfer to aquaculture cages, with a semi automatic Artificial Neural Network tool. Aquaculture 291, 161167.
[4] Hartley R., Zisserman A., 2004, The Direct Linear Transformation (DLT) algorithm, Multiple View Geometry in Computer Vision. 2nd edn., Cambridge University Press, Cambridge, pp. 88–93.
[5]Harvey, E., Fletcher, D., Shortis, M., 2002, Estimation of reef fish length by divers and by stereo-video A first comparison of the accuracy and precision in the field on living fish under operational conditions. Fish. Res. 57, 255265.
[6]Harvey, E., Cappo, M., Shortis, M., Robson, S., Buchanan, J., Speare, P., 2003, The accuracy and precision of underwater measurements of length and maximum body depth of southern bluefin tuna (Thunnus maccoyii) with a stereo-video camera system. Fish. Res. 63, 315326.
[7] Hsieh, CL., Chang, HY., Chen, FH., Liou, JH., Chang, SK., Lin, TT., 2011, A simple and effective digital imaging approach for tuna fish length measurement compatible with fishing operations. Comput. Electron. Agric. 75, 4451.
[8]Ikegami, Y., Sakurai, S., Yabe, K., 1991, Direct Linear Transformation method. J. Sports Sci. 10, 191195.
[9]Takahashi, H., Matsuda, A., Akamatsu, T., 2006, Evaluation of the Three-Dimensional Measurement Accuracy of FISCHOM Stereo Camera System. Tech. Rep. Nat. Res. Inst. Fish. Eng. 28, 8793.
[10] Wang, X.F., Tang,, Y., Zhang,, Z.Z., Liu,, H.Y., 2008, Feasibility of using digital photography for environmental monitoring of animals in an artificial reef. Int. Arch. Photogrammetry, Remote Sensing and Spatial Information Sciences 37, 339342.
[11]Watson, D.L., Harvey, E.S., Anderson, M.J., Kendrick, G.A., 2005, A comparison of temperate reef fish assemblages recorded by three underwater stereo-video techniques. Mar. Biol. 448, 415425.
[12]Watson, D.L., Harvey, E.S., Kendrick, G.A., Nardi, K., Anderson, M.J., 2007, Protection from fishing alters the species composition of fish assemblages in a temperate-tropical transition zone. Mar. Biol. 152, 11971206.
[13]Williams, K., Rooper, C.N., Towler, R., 2010, Use of stereo camera systems for ssessment of rockfish abundance in untrawlable areas and for recording pollock behavior during midwater trawls. Fish. Bull. 108, 352362

Keywords

A digital stereo-video camera system for three-dimensional monitoring of free-swimming Pacific bluefin tuna, Thunnus orientalis, cultured in a net cage

  • Shinsuke Torisawa (a1), Minoru Kadota (a1), Kazuyoshi Komeyama (a2), Katsuya Suzuki (a3) and Tsutomu Takagi (a1)...

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