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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/25765

Title: Burst Swimming Speeds of Two Minnows Acrossocheilus paradoxus and Varicorhinus barbatulus in Relation to Water Temperature and Body Size
Authors: Ming-Fong Yeh;Chuan-Huang Ho;Ming-An Lee
Contributors: NTOU:Department of Environmental Biology and Fisheries Science
Keywords: Swimming performance;Burst swimming;Minnows;Acrossocheilus paradoxus;Varicorhinus barbatulus;Taiwan
Date: 2010
Issue Date: 2011-10-20T08:25:38Z
Publisher: Journal of the Fisheries Society of Taiwan
Abstract: abstract:Burst swimming speeds (Uburst) of various sizes (5 cm to 18 cm) of Acrossocheilus paradoxus and Varicorhinus barbatulus were examined in a water tunnel at 16o, 20o, 24o 28o and 32oC. Uburst was significantly positively correlated with body length for each of the water temperatures tested; the relationship was expressed by a linear equation. The size dependency of Uburst expressed by the slopes of the equations was higher for A. paradoxus than for V. barbatulus at 16o to 28oC but not at 32oC. For each species the response curve of average Uburst to the temperatures was expressed by a quadratic function equation with the highest Uburst of 1.63 m/s at the optimum temperature of 22.10oC for A. paradoxus but 1.74 m/s at 19.29oC for V. barbatulus. The optimum temperature of the former was 2.81oC higher than that of the latter, corresponding to the fact that A. paradoxus is a warmer water species that primarily occurs in the middle reaches of streams at low elevations, while V. barbatulus is a colder water species in the upper reaches of the streams at higher elevations. In addition, A. paradoxus was found to be able to perform above 90% of its maximum swimming performance all the year round, whereas V. barbatulus was only in the winter dry season but not in the summer monsoon season. The differences in the instream distribution and movement between the two species are due to their difference in response of their swimming performance to water temperature that is associated with stream water velocity and changes seasonally.
Relation: 37(1), pp.37-48
URI: http://ntour.ntou.edu.tw/handle/987654321/25765
Appears in Collections:[環境生物與漁業科學學系] 期刊論文

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