Abstract
The present report deals with a study of the age and growth estimations based on the ring marks of scales for each of three subspecies of Carassius auratus: ginbuna, Carassius auratus langsdor fi Temminck et Schlegel, gengorobuna, C.a.cuvieri T.et S., and nagabuna, C.a.buergeri T.et S.The materials used in this study consist of 463 individuals of ginbuna, 270 individuals of gengorobuna, and 175 individuals of nagabuna.They were collected in the lower reaches of the Nagara River, central Japan, during one year from May 1976.For examination of the scales, six scales, from 8th to 13th, of the row just above the lateral line of the left side of the fish were taken, and three scales among them which are revealed to be subject to regular in shape were employed for measurement.
