Fisheries Science

, Volume 75, Issue 3, pp 715–722

Effect of shrimp farming organic waste on food availability for deposit feeder crabs in a mangrove estuary, based on stable isotope analysis

  • Koetsu Kon
  • Naoya Kawakubo
  • Jyun-Ichi Aoki
  • Prasert Tongnunui
  • Ken-Ichi Hayashizaki
  • Hisashi Kurokura
Original Article Environment

DOI: 10.1007/s12562-009-0060-x

Cite this article as:
Kon, K., Kawakubo, N., Aoki, JI. et al. Fish Sci (2009) 75: 715. doi:10.1007/s12562-009-0060-x

Abstract

We have investigated the impact of shrimp farming waste on benthic invertebrates in a mangrove estuary in southern Thailand. Stable carbon and nitrogen isotope analyses were used to assess the contribution of aquaculture feed as a nutrient source for benthic invertebrates (fiddler crabs Uca annulipes, U. bengali, and U. forcipata) and to compare the organic origin of sediments in tributaries with and without a shrimp farm. The isotopic contributions of shrimp feed to crabs varied between the tributaries: in the tributary with the farm, the crabs had higher contributions from shrimp feed, whereas there was only a small contribution from aquaculture feed in crabs from the reference tributary. In contrast, the contribution of shrimp feed to the sediment did not differ between the tributaries, the contributions to sediments from aquaculture feed were, in general, quite low. Based on these results, we suggest that, in mangrove estuaries, changes in the food sources of several surface feeder invertebrates would be an effective indicator of the possibility that aquaculture waste was affecting the benthic ecosystem.

Keywords

AquacultureEstuaryFiddler crabIsoSourceMangroveShrimp farmingStable isotopesThailand

Copyright information

© The Japanese Society of Fisheries Science 2009

Authors and Affiliations

  • Koetsu Kon
    • 1
  • Naoya Kawakubo
    • 1
    • 4
  • Jyun-Ichi Aoki
    • 1
    • 5
  • Prasert Tongnunui
    • 2
  • Ken-Ichi Hayashizaki
    • 3
  • Hisashi Kurokura
    • 1
  1. 1.Department of Global Agricultural Sciences, Graduate School of Agricultural and Life SciencesUniversity of TokyoBunkyoJapan
  2. 2.Faculty of Science and Fisheries Technology, Department of Marine ScienceRajamangala University of Technology SrivijayaSikaoThailand
  3. 3.School of Marine BiosciencesKitasato UniversitySanriku, OfunatoJapan
  4. 4.Sojitz CooperationAkasaka, MinatoJapan
  5. 5.Tohmatsu Consulting Co.Ohtemachi, AoiJapan