Based on the information provided within the question it can be said that this lower urine output is primarily due to innervation of the sympathetic nervous system. This supply of nerves then increases the pressure which tightens the afferent arteriole, and is what prevents urine from passing through. Hence why the urine output is only 4 mL over the first hour on arrival.
Rather than helping one species you can help a entire ecosystem. if you think about it, you would be saving more in a ecosystem then you would in just 1 single species
