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Fisheries Science

, Volume 71, Issue 3, pp 543–550 | Cite as

Comparison of invertebrate abundance in a seagrass bed and adjacent coral and sand areas at Amitori Bay, Iriomote Island, Japan

  • Yohei Nakamura
  • Mitsuhiko Sano
Article

Abstract

To examine whether or not reef-associated seagrass beds harbor abundant food resources for resident and visiting fishes, the invertebrate density and biomass in a seagrass bed were compared with those in adjacent coral and sand areas at Amitori Bay, Iriomote Island, Japan, in June 2002. The vegetation within the bed was dominated by Enhalus acoroides, the coral area comprising primarily Acropora spp. Epifaunal density was greater on the seagrass than on the corals. whereas biomass was greater on the latter. Tanaids, chironomid larvae, errant polychaetes, and gammaridean amphipods were dominant taxa on the seagrass; larger crustaceans, such as crabs and shrimps, being abundant on the corals. The density of infauna was greatest in the seagrass bed, followed by the coral and sand areas, whereas biomass was greatest in the coral area, followed by the seagrass bed and sand area. Each of the three habitats was dominated by harpacticoid copepods and errant polychaetes, although the density of each taxonomic group differed among the habitats. Important food items of seagrass bed fishes, such as harpacticoid copepods, gammaridean amphipods, errant polychaetes, and tanaids, were abundant in the seagrass bed, the density of each being greater than in the other two habitats.

Key Words

coral area epifauna infauna invertebrate sand area seagrass bed 

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Copyright information

© The Japanese Society of Fisheries Science 2005

Authors and Affiliations

  1. 1.Department of Global Agricultural Sciences, Graduate School of Agricultural and Life SciencesUniversity of TokyoBunkyo, TokyoJapan

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