Abstract
The horizontal and vertical movements of eight immature hatchery-reared Mekong giant catfish Pangasianodon gigas were monitored using acoustic telemetry in Mae Peum Reservoir, Thailand between 2003 and 2004. The fish were monitored for between eight days and more than 9 months. All of the fish moved over the entire reservoir within approximately 40 days after release. Subsequently, the home range became small approximately 40 days after release. The fish preferred deep areas in the reservoir. The fish displayed diel horizontal and vertical movement patterns. The fish showed larger-scale horizontal movement during the daytime than at night. The fish repeatedly showed active vertical movement during the day, whilst there was little variation in swimming depth at night. Our results imply that the vertical movements of the fish were related to the environmental condition of the reservoir.
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Mitamura, H., Mitsunaga, Y., Arai, N. et al. Horizontal and vertical movement of Mekong giant catfish Pangasianodon gigas measured using acoustic telemetry in Mae Peum Reservoir, Thailand. Fish Sci 74, 787–795 (2008). https://doi.org/10.1111/j.1444-2906.2008.01590.x
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DOI: https://doi.org/10.1111/j.1444-2906.2008.01590.x