北海道羅臼の海洋深層水から連行採取された本邦初記録のフジツボ（Chirona evermanni）(First record of the acorn barnacle, Chirona evermanni carried with deep ocean water (DOW) at Rausu, Hokkaido, Japan)
- 標題
- 北海道羅臼の海洋深層水から連行採取された本邦初記録のフジツボ（Chirona evermanni）(First record of the acorn barnacle, Chirona evermanni carried with deep ocean water (DOW) at Rausu, Hokkaido, Japan)
- 作者
- 西川明豪・山口寿之・山石秀樹・櫻庭將藏・高橋正征(Akihide Nishikawa, Toshiyuki Yamaguchi, Hideki Yamaishi, Shouzou Sakuraba and Masayuki Takahashi)
- 文件屬性
- 日本研究
- 知識分類
- 基礎研究
- 出版年
- 2016
- 刊名
- 海洋深層水研究
- 卷
- 16
- 期
- 3
- 頁
- P82-87
- 點閱數
- 2410
摘要
北海道羅臼漁港の海洋深層水取水管（取水深度350 m）から，これまで国内では生きた標本として確認されたことのない付着性大型フジツボの非破損個体（採取時の生死は未判別）と多数の脱皮殻が連行採取された．このフジツボは，太平洋北部の水深20～75 mで約10℃以下の冷水海域に生息するChirona evermanni（Pilsbry）と同定され，日本列島では津軽海峡以北の海底堆積物中で死殻が発見されているが生存個体は確認されていない．取水管は硬質ポリエチレン製（外径350 mm, 内径268 mm, 長さ2,817 m）で，2004年8月に海中敷設，2006年1月に取水ポンプと接合，同年8月から事業取水が行われている．2010年頃から，フジツボの殻（周殻，蓋板など）の破片が連行され，現在も続いている．2011年と2012年にはそれぞれ1個の非破損個体が連行された．
An acorn barnacle was collected in intact state together with deep ocean water pumped from 350 m deep at Rausu, Hokkaido without con rming the sample as being dead or alive. The barnacle was identi ed as Chirona evermanni (Pilsbry) previously known to inhabit cold seawater (below 10℃) at 20‒75 m deep in the northern North Paci c Ocean. Living samples have not been found from around Japan except for dead shells in coastal sediments in the Tsugaru Strait. The deep ocean water pipe was made of high density polyethylene (outside diameter of 350 mm, inside diameter of 268 mm, length of 2,817 m), was installed in the sea in August 2004, connected to the pump in January 2006 and has been continuously operational since August 2006. Shell fragments of the acorn barnacle have also been collected frequently since 2010. Complete shells of the barnacle were collected twice, one each in 2011 and 2012.
An acorn barnacle was collected in intact state together with deep ocean water pumped from 350 m deep at Rausu, Hokkaido without con rming the sample as being dead or alive. The barnacle was identi ed as Chirona evermanni (Pilsbry) previously known to inhabit cold seawater (below 10℃) at 20‒75 m deep in the northern North Paci c Ocean. Living samples have not been found from around Japan except for dead shells in coastal sediments in the Tsugaru Strait. The deep ocean water pipe was made of high density polyethylene (outside diameter of 350 mm, inside diameter of 268 mm, length of 2,817 m), was installed in the sea in August 2004, connected to the pump in January 2006 and has been continuously operational since August 2006. Shell fragments of the acorn barnacle have also been collected frequently since 2010. Complete shells of the barnacle were collected twice, one each in 2011 and 2012.