相模湾のヒラツメガニの生態
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概要
- 論文の詳細を見る
The present paper presents some interesting facts about this crab which was observed seasonally in Sagami Bay. The period of the good catch occurs twice a year, April-July and October-January. They mainly inhabit the littoral region at a depth of about 5 m throughout the year, and are very few or scanty on sea floor more than 20 m deep. The group of crabs measuring 30 mm in carapace width in June grows up to 55 mm in December and to 70-80 mm in April in the following year. The rate of growth tends to slow down in October towards winter. It is assumed that the spawning period is twice a year, from September to October, and from January to April. The latter period is especially long with a peak from January to March. The biological minimum size of this crab is thought to be about 43 mm in carapace width.
- 日本生態学会の論文
- 1976-06-30