MEPS 358:301-307 (2008)  -  DOI: https://doi.org/10.3354/meps07332

Long-term collection of benthic and benthopelagic organisms from a deep-water inlet offshore from Okinawa, Japan

Takashi Kuramochi1, Yusuke Sudo2,4, Eishin Tamaki2,4, Kazuhito Shiroma2, Takeshi Naganuma3,*

12-6-3-504 Ashina, Yokusuka, Kanagawa 240-0104, Japan
2Okinawa Prefectural Deep Sea Water Research Center, Kumejima-cho, Okinawa 901-3104, Japan
3School of Biosphere Science, Hiroshima University, Higashi-hiroshima 739-8528, Japan
4Present address: Okinawa Prefectural Fisheries and Ocean Research Center, Itoman, Okinawa 901-0305, Japan
*Corresponding author. Email:

ABSTRACT: Deep seawater facilities inadvertently collect organisms from suction inlets and, thus, may serve as unique biological platforms. Organisms collected from a depth of 612 m offshore from Okinawa, Japan, were archived from 2000 to 2006. Of the total of 633 individuals collected, 550 specimens were examined and taxonomically identified; the remaining 83 samples were too seriously damaged to examine. As a result, a total of 63 species were identified, and taxa comprised 34 fishes, 23 crustaceans, 5 mollusks and 1 echinoderm. Although a weak tendency of year-to-year increase in the catch number was apparent, it should be confirmed by monitoring for a longer term. No clear seasonality for the catch number and species composition was observed. A significant decline in the number of the pleurobranchid Pleurobranchella nicobarica and an increase in the benthopelagic holothurian Enypniastes eximia were recorded during the study period; these variations may imply that unspecified environmental changes have occurred.


KEY WORDS: Deep-sea · Fish · Benthos · Long-term collection


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Cite this article as: Kuramochi T, Sudo Y, Tamaki E, Shiroma K, Naganuma T (2008) Long-term collection of benthic and benthopelagic organisms from a deep-water inlet offshore from Okinawa, Japan. Mar Ecol Prog Ser 358:301-307. https://doi.org/10.3354/meps07332

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