<研究報告>カラマツガイSiphonaria japonicaの飼育

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The attempt has been made to investigate the breeding of the siphone snails Siphonaria japonica in our laboratory under the room temperature conditions, from May in 1968 to July in 1969. Samples of at least fifty specimens of adult S. japonica were obtained from Katsuma, Shika Island, Fukuoka. For rearing of the mollusks, we used the apparatus as shown in Fig. 1. The rearing of this mollusks requires an adequate supply of sea water of proper salinity. The sea water used at our laboratory have been carried back from Mitoma shore, located about 10 kilometers to the east of Katsuma, and the salinity of the water was virtually the same as in Katsuma. The circulating of water current and the sufficient supply of oxygen in the aquarium can be maintained by sending air into the water. We traied a green algae, Enteromorpha prolifera, as the food of the S. japonica, although they have fed on a kind of brown algae on the rock surface at the shore. The writers have observed the siphone snails creeping on the sotne surface covered with the green algae and feeding on it in the aquarium. Most of the egg-ribbons (Fig. 2) which they spawned during the examination, were concentrically reproduced during the period of late January and early February. We have also found that the each snail of Siphonaria reproduce several times a year (Table 1). The spermatophore exchanged between the mating adult snails is shown in Fig. 4, and it closely resembles the one described by Abe ('40).
福岡女子大学の論文
1970-03-30

<研究報告>カラマツガイSiphonaria japonicaの飼育

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