イシガメの孵化時期

Abstract

Mauremys japonica (=Clemmys japonica) is the second most abundant turtle species in the Kyoto area. It lays eggs in June and July, and hatchlings appear from the last past of August to early October, as shown in Table 1. In our observations, only one clutch is laid annually, and no eggs winter in the ground (Cf Fukada and Ishihara, 1974, Chinemys reevesii). The newly emerged hatchling has a carapace length of 3.5cm and a weight of 8g, as shown in Table 2.