1/11/2024 0 Comments Freshwater fish tank temperatureActive metabolic rate was higher in largemouth bass than in bluegill at 16☌ and 20☌. Mass corrected oxygen consumption was influenced not only by temperature but also by both species and species and temperature interactions. Overall, metabolic rate was higher at higher temperatures. Mass corrected oxygen consumption was different between fish ran at the three different temperatures. Fish were also implanted with bipolar electrodes to record muscle activity using electromyography (EMG) standard techniques. All temperatures were controlled by chiller and heater. Fish were fasted for at least 24 hours and acclimatized for 2 hours prior each trial. Fish were housed at 20☌ and then tested in a recirculating flow tank 2 body length (BL)/sec at 16☌, 20☌ and 22☌ while measuring water oxygen consumption as a proxy of metabolism. I focused on the impact of temperature change at the muscle level in these two species and the capacity to adapt to rapid changes in the environment. This study investigates physiological processes limiting thermal tolerance, specifically how changes in water temperature affect the swimming energetics and muscle mechanics in largemouth bass ( Micropterus salmoides) and bluegill ( Lepomis macrochirus). These ranges can coincide for fishes that evolved in similar habitats. Fishes have evolved physiologically to live within a specific range of environmental variation and existence outside of that range can be stressful or fatal.
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