Aerobic Swimming Performance of Juvenile Largemouth Bronze Gudgeon (Coreius guichenoti) in the Yangtze River

Abstract

Largemouth bronze gudgeon (Coreius guichenoti), a fish species once abundant in the Yangtze River, has been rapidly declining in recent years. One important factor, among many, is the interruption of the free-flowing rivers by dams. To obtain data that can be applied to the design of an effective fishway for C. guichenoti and other species in the fish community, a laboratory study of juvenile C. guichenoti's swimming ability and energetics was conducted in a flume-type respirometer equipped with a high-speed video camera system to record swimming behavior. The critical swimming speed (Ucrit ), standard metabolic rate (SMR), and maximum metabolic rate (MO2,max ) were determined during steady swimming at four water temperatures (10, 15, 20, and 25°C). A power function accurately describes the relationship between oxygen consumption rate (MO2 ) and swimming speed (U) at the four temperatures. The Ucrit , SMR, MO2,max , and metabolic scope increased with increasing temperature. The relationship between cost of transport (COT) and U was characteristically inverse bell-shaped, with minimum COT at Uopt = 4.5-5.0 body lengths per second (bl sec(-1)). This investigation provides data on the swimming ability of C. guichenoti that will add to the basic science required for fishway design.

Effects of acute temperature changes on the swimming abilities and oxygen consumption ofPtychobarbus kaznakovifrom the Lancang River

“…The MO 2 was continuously recorded every 10 min for 24 hr. When the dissolved oxygen level within the testing area was insufficient (<80%) (Tu, Li, Yuan, Huang, & Johnson, ), a submersible pump was used to facilitate water exchange between the closed tank and the external water sources to ensure that the levels never fell below 80% saturation during testing. The MO 2 was measured using the following formula:where V is the respirometer volume (L), d(DO)/dt is the slope (mgO 2 l −1 hr −1 ), and M is the fish mass (kg).…”

Integrating Water Flow, Locomotor Performance and Respiration of Chinese Sturgeon during Multiple Fatigue-Recovery Cycles

“…Maximum oxygen consumption rate ( MO 2, max ) of each sturgeon is the maximum value of MO 2 during the stepped velocity test. The aerobic scope ( AS ) is the difference between MO 2, max and MO 2, routine and is related to the energy potentially available for swimming [33], [34].…”

Physiological responses to swimming fatigue in juvenile largemouth bronze gudgeon Coreius guichenoti

“…Stepped velocity tests were conducted in a flume‐type respirometer with a rectangular swimming chamber (L × W × H = 65 cm × 25 cm × 25 cm; Tu et al, ). Temperature was controlled with a submersible heater and the flow rate was controlled with a propeller driven by a 350 watt variable‐speed motor, giving a water velocity range of 0·08 to 1·42 m s −1 .…”

“…time) was obtained by linear regression and the oxygen consumption rate was calculated using the formula: Ṁ O 2 = V [ δ (DO) δt −1 ] M T −1 , where δ (DO) δt −1 is the slope, V is the volume of the respirometer and M T is the mass of the fish (kg). Oxygen consumed by oxidation of ammonia and bacterial respiration was <1% of the oxygen consumed by the fish and considered negligible (Tu et al, ).…”