著者
藤田 喜久 上野 大輔 鈴木 廣志 渡久地 健
出版者
日本甲殻類学会
雑誌
CANCER (ISSN:09181989)
巻号頁・発行日
vol.28, pp.33-36, 2019

<p>Three stygobiotic atyid shrimps, <i>Halocaridinides trigonophthalma</i> (Fujino & Shokita, 1975), <i>Caridina rubella</i> Fujino & Shokita, 1975 and <i>Caridina</i> sp., are recorded firstly on the basis of specimens collected from an anchialine cave in Yoron-jima Island, central Ryukyus, Japan.</p>
著者
峯 光一 石田 憲 福原 亮史
出版者
日本甲殻類学会
雑誌
CANCER (ISSN:09181989)
巻号頁・発行日
vol.28, pp.17-20, 2019-08-01 (Released:2019-09-03)
参考文献数
22

This report covers two malformations among coconut crabs Birgus latro observed on islands of Okinawa, Japan: an extra pleopod recorded in Iriomote Island, and an abnormal ambulatory leg found in Hatoma Island. A total of 328 crabs was investigated in Iriomote Island, two individuals that have an abnormal pleopod were found. Normally, female coconut crabs have three pleopods on the left side of the second to the fourth abdominal somites. However, the abnormal individuals had an additional pleopod on the right side of the third abdominal somite. This malformation is the first report within the species. We also found one coconut crab with an abnormal ambulatory leg, having a trifid tip on the dactylus of the left second thoracic appendage, among 156 crabs observed in Hatoma Island. This abnormality is probably caused by the battles within the species or against natural predators.
著者
和田 年史 和田 恵次
出版者
日本甲殻類学会
雑誌
CANCER (ISSN:09181989)
巻号頁・発行日
vol.24, pp.15-19, 2015-08-01 (Released:2017-07-05)

Seventeen juvenile specimens of the tropical ghost crab Ocypode sinensis Dai, Song & Yang, 1985 (Ocypodidae) were found on three sandy beaches in Shinonsen-cho, Hyogo Prefecture, western Honshu, Japan. This represents the first record of the species from the coast of Sea of Japan. These juveniles of O. sinensis occurred around shorelines of the sandy beaches, together with juveniles of temperate O. stimpsoni. Their co-occurrences suggest that, at least the juveniles of tropical O. sinensis and native temperate O. stimpsoni may compete for the habitat. The range extension of the tropical O. sinensis, especially towards the north along the coast of the Sea of Japan, should be monitored in the context of possible competitions with native species.
著者
本尾 洋
出版者
日本甲殻類学会
雑誌
CANCER (ISSN:09181989)
巻号頁・発行日
vol.8, pp.35-38, 1999
参考文献数
17
被引用文献数
2