Taxonomical and Ecological Study on alpheid shrimps living in tunnel bored in rock at the Ryukyu Islands

琉球群岛岩石隧道中生活的白虾的分类学和生态学研究

• 批准号: 14540655
• 负责人: TAKEDA Masatsune
• 金额: $ 1.66万
• 依托单位: National Museum of Nature and Science, Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14540655/
• 关键词: Alpheid shrimps; Boring; Tunnel; Alpheus obesomanus; Jonesius; Ryukyu Islands; 岩石穿孔性; ライブロック; 奄美大島; ゾエア幼生

During this study from 2002 to 2004, many specimens of alpheid shrimps living tunnels bored in rocks were collected in many places in Amami-Oshima Island, Okinawa-jima Islands and Ishigaki-jima Islands in the Ryukyu Islands. The shrimps and the small crabs also living in tunnels were identified, and the rocks were cut into several slices to get information about details of the tunnels. Shape of the tunnels are not always constant, becoming thicker and more complicated in the larger inhabitants, but it is sure that they cannot go out of the tunnel, because the diameter of the opening(s) is (are) only 1.5-2.5 mm much smaller than the size of the shrimps. The tunnel is smooth at the inside wall, and probably made wider and longer using the strong hammer-shaped movable finger. The collected specimens were identified with Alpheus obesomanus distributed in the tropical Indo-West Pacific coral reefs.On breaking the rock in the field, small crabs referable to the genus Jonesius of the family Trapeziidae were rather commonly found. It is apparent that they cannot dig the tunnel into rock by themselves, and therefore they use the abandoned tunnel of Alpheus obesomanus. Detailed examination of them revealed that they are referred to two different genera distinct from each other.

本研究于2002 ~ 2004年在琉球诸岛的奄美大岛、冲绳诸岛和石垣诸岛等地采集了大量的石穴洞虾标本。也生活在隧道里的虾和小螃蟹被识别出来，岩石被切成几片，以获得有关隧道细节的信息。隧道的形状并不总是恒定的，在较大的居民中变得更厚和更复杂，但可以肯定的是，他们不能走出隧道，因为开口的直径（s）是（是）只有1.5-2.5毫米远小于虾的大小。隧道内壁光滑，可能是使用坚固的锤形活动指使其更宽更长。采集的标本经鉴定为分布于热带印度-西太平洋珊瑚礁中的细颈隐翅虫。在野外破碎岩石时，经常发现属于梯形科Jonesius属的小螃蟹。显然，它们无法自己在岩石中挖掘隧道，因此它们使用了细颈隐翅虫废弃的隧道。详细的研究表明，它们是指两个不同的属，彼此不同。

项目成果

Progress of Medical Parasitology in Japan Vol.7.(Otsuru, M., S. Kamegai, S. Hayashi eds.)

日本医学寄生虫学进展 Vol.7.（Otsuru, M., S. Kamegai, S. Hayashi 编）

• 发表时间: 2003
• 作者: Yoshiaki Shibagaki;Toshiaki Kuramochi
• 通讯作者: Toshiaki Kuramochi