At the present day artificial impregnation in pisciculture is extensively used with great success.
"Anomalies and Curiosities of Medicine" by George M. Gould
He took a practical interest in pisciculture.
"Norfolk Annals A Chronological Record of Remarkable Events in the Nineteeth Century, Vol. 2" by Charles Mackie
Pisciculture, its valuable results, 118.
"Man and Nature" by George P. Marsh