Seasonal Changes in the Fish Assemblage in a Seagrass Bed in the Central Seto Inland Sea

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  • Mohri Kie
    Takehara Marine Science Station, Graduate School of Biosphere Science, Hiroshima University
  • Kamimura Yasuhiro
    Takehara Marine Science Station, Graduate School of Biosphere Science, Hiroshima University
  • Mizuno Ken-ichiro
    Center for Fishery and Oceanographic Technology, Hiroshima Prefectural Technology Research Institute
  • Kinoshita Hikari
    Shimane Prefecture Matsue Fishery Office
  • Toshito Syun-ichi
    Takehara City Office
  • Shoji Jun
    Takehara Marine Science Station, Graduate School of Biosphere Science, Hiroshima University

Bibliographic Information

Other Title
  • 瀬戸内海中央部のアマモ場における魚類相の季節変化

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Abstract

A total of 5,885 fishes belonging to 53 taxa in 27 families were caught during a monthly seine survey (August 2008 to July 2009) in a seagrass Zostera marina bed off Ikuno Island, Hiroshima Prefecture, central Seto Inland Sea, Japan. The numerically dominant species (% in number) were Rudarius ercodes (21.5%), Sebastes cheni (16.9%) and Favonigobius gymnauchen (12.3%) and the weight-based dominant species (% in weight) were S. cheni (15.8%), Takifugu pardalis (10.4%) and Ditrema temminckii pacificum (10.1%). The mean number of fish species was lowest in February (7.5±1.7/100 m2) and highest in September (16.5±1.3/100 m2). The mean fish abundance fluctuated from 25.0±5.8/100 m2 (February) to 365.8±69.4/100 m2 (October). The mean fish biomass varied between 115.5±71.8 g/100 m2 (February) and 672.6±485.0 g/100 m2 (June). Syngnathus schlegeli, D. temminckii pacificum, F. gymnauchen, Acentrogobius pflaumii, R. ercodes were collected throughout the 12 months surveyed. Sebastes cheni, Hypodytes rubripinnis, Gymnogobius heptacanthus, T. pardalis were collected in 11 months and Pseudoblennius cottoides and Tridentiger trigonocephalus were in 10 months. Fish fauna was more diverse from spring to autumn when sagrass shoot density was high and leaf length was long.

Journal

  • Aquaculture Science

    Aquaculture Science 61 (2), 215-220, 2013

    Japanese Society for Aquaculture Science

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