Injuries and serum enzyme activities of fingerling channel catfish ( Ictalurus punctatus) harvested with a turbine pump

External injuries and the serum activities of two enzymes were determined for fingerling channel catfish ( Ictalurus punctatus) moved from ponds to hauling trucks by either a turbine pump or a conventional lift net attached to a boom. Fish harvested with the turbine pump had significantly more reddened cutaneous abrasions and reddened fins than did fish harvested with the lift net. Activities of serum aspartate aminotransferase (AST) and lactate dehydrogenase (LDH) increased in some groups of harvested fish, but there were no consistent differences between fish harvested with the pump or lift net. External lesions caused by loading equipment are of concern because of the potential for infections.