The Science of Aquaculture cross word

These species are hardly fish that can survive in crowed conditions and low oxygen.
Bottom feeder with whiskers
A net that fish are harvested by and dragged across the pond by human or mechanical power
Long concrete structures that provide a constant flow of clean, cool water .
A technician injects the female with hormones to accelerate the ovulation process.
The oxygen from the water and put it into the bloodstream.
The layers in a body of water in which the drop in temperature equals or exceeds 1 c for each meter of water depth.
determines the oxygen level in the water
The level of the oxygen that is lower than the ideal, that the producer operates that are placed in the pond.
The water that flows along the ground after a rain.