5ALLEN K O. Effects of stocking density and water exchange rate on gowth and survival of channel catfish lctalurus punctatus (Rafinesque) in circular tanks[J]. Aquaculture, 1974, 4:29-39.
6FAGERLUND U H M, MCBRIDE J R, STONE E T. Stress-related effects of hatchery rearing density on coho salmon[ J ]. Transactions of the Americans Fisheries Society, 1981, 110(5) :644-.649.
7SMITH H T, SCHRECK C B, MAUGHAN O E. Effect of population density and feeding rate on the fathead minnow ( Pimephales promelas) [ J ]. Journal of Fish Biology, 1978, 12 (5) :449-455.