タイワンドジヨウの口腔内消化作用の研究
1953 年 3 巻 1 号 p. 21-28
詳細
1953 年 3 巻 1 号 p. 21-28
This report is based on a physiological study of the digestive function in the mouth of Ophiocephalus argus CANTOR. The resuls obtained are summarized as follows:
1. Besides the usual teeth known in other fishes, this fish has teeth on the parasphenoid.
2. The young, up to ca. 62 mm in total length, have few teeth on the gillarches.
3. This fish is polyphobont and grows to a size of ca. 510 mm in total length within 16 months. The total number of teeth at thi3 size is ca. 4, 000.
4. It is presumed that the stage in which the voracity of this fish appears remarkably and attacks other animals is more than 16 months after hatching.
5. It is presumed that the suitable term for artificial culture of this fish in ponds is about 6 months, and that the body-weight suitable for harvest is about 1.2-0.23kg.
