What minimum water temperature is cited as necessary for Wels catfish to begin thriving and increasing activity?
Answer
Above 15°C (59°F)
The activity level and feeding windows of the Wels catfish are directly tied to water temperature because of their metabolism. The text specifies that these fish are warm-water species and genuinely thrive when the surrounding water temperature rises above the threshold of 15 degrees Celsius, which is equivalent to 59 degrees Fahrenheit. Below this point, their metabolism slows significantly, leading to reduced mobility, especially as they prepare for colder periods in autumn.
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