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Zoological Research
Kunming Institute of Zoology, Chinese Academy of Sciences
ISSN: 2095-8137
Vol. 34, No. 4, 2013, pp. 429-436
Bioline Code: zr13066
Full paper language: English
Document type: Report
Document available free of charge

Zoological Research, Vol. 34, No. 4, 2013, pp. 429-436

 en Effect of water velocity on swimming behavior of juvenile Megalobrama amblycephala check for this species in other resources
ZHANG, Qian & KANG, Bin

Abstract

To investigate the swimming behavior of juvenile Megalobrama amblycephala check for this species in other resources , a tracking analysis device was designed to monitor behavior indicators including velocity (V), swimming distance (SD), turn angle (TA), distance to center-point (DC) and swimming track (ST) at different flow rates (0, 0.1, 0.2, 0.3 and 0.4 m/s) at 25℃. Results showed that indicator values all increased with increasing flow rate. Values of V, SD and TA showed no significant differences among the flow rates of 0, 0.1 and 0.2 m/s, respectively (P>0.05). However, they increased obviously at flow rates of 0.3 and 0.4 m/s (P<0.05), with no significant differences found between these two flow rates (P0.05). The SD value did not change markedly according to flow rates (P>0.05), while ST showed complex patterns corresponding to increasing flow rate. A significant linear positive correlation occurred in free-swimming fish between V and SD, while a negative relationship was found between V and TA. No regular relationship was deduced between swimming speed and DC.

Keywords
Water velocity; Megalobrama amblycephala; Swimming speed; Turn angle; Swimming track

 
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