Distribution of the Japanese sea cucumber Apostichopus japonicus in the intertidal zone of Hirao Bay, eastern Yamaguchi Pref., Japan-Suitable environmental factors for juvenile habitats
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Accession number;06A0769752
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| Title;Distribution of the Japanese sea cucumber Apostichopus japonicus in the intertidal zone of Hirao Bay, eastern Yamaguchi Pref., Japan-Suitable environmental factors for juvenile habitats |
| Author;
YAMANA YUSUKE
(National Fisheries Univ., JPN)
HAMANO TATSUO
(National Fisheries Univ., JPN)
MIKI KOICHI
(National Fisheries Univ., Tana Marine Biological Lab., JPN)
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Journal Title;Journal of National Fisheries University
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Journal Code:F0239A
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ISSN:0370-9361
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VOL.54;NO.3;PAGE.111-120(2006)
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| Figure&Table&Reference;FIG.6, TBL.1, REF.12 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;To reveal the distribution of Apostichopus japonicus in the intertidal zone of Hirao Bay, eastern Yamaguchi Pref., 1-4 line-transect surveys were carried out at 8 stations during 24-27 April 2005. At St. D-1 (Mizuba, Hirao Town), a number of juveniles of about 10-50 mm Le (estimated anesthetized body length, the standard body length of A. japonicus) were observed, and the habitat was considered to be suitable for juveniles of A. japonicus. However, at St. D-2, 3, and 4, which were only about 50 m apart from St. D-1, A. japonicus were rare and 5 individuals in total (0.1 inds./m'2') were observed, while 133 individuals (6.7 inds./m'2') were observed at St. D-1. Here environmental conditions suitable for the growth of A. japonicus were described from differences in both habitats as follows: in +0.4 m at tide level and rocky bottom favorable for Sargassum; eutrophicated moderately with clusters of Ulva; protected from environmental fluctuation in low tide. (author abst.) |
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