GUO Kai, ZHAO Wen, WANG Shan, LIU Baozhan, ZHANG Peng. Food web structure and trophic levels in a saltwater pond sea cucumber and prawn polyculture system[J]. Acta Oceanologica Sinica, 2016, 35(4): 58-62. doi: 10.1007/s13131-016-0834-9
Citation: GUO Kai, ZHAO Wen, WANG Shan, LIU Baozhan, ZHANG Peng. Food web structure and trophic levels in a saltwater pond sea cucumber and prawn polyculture system[J]. Acta Oceanologica Sinica, 2016, 35(4): 58-62. doi: 10.1007/s13131-016-0834-9

Food web structure and trophic levels in a saltwater pond sea cucumber and prawn polyculture system

doi: 10.1007/s13131-016-0834-9
  • Received Date: 2014-10-09
  • Rev Recd Date: 2015-07-31
  • The food sources of aquacultured Apostichopus japonicus and the trophic levels of organisms in a sea cucumber(A. japonicus) and prawn(Penaeus japonica) polyculture system in a saltwater pond in Zhuanghe, Liaoning Province were examined using carbon and nitrogen stable isotopes. Across organisms, δ13C ranged from(-25.47±0.20)‰ to(-16.48±0.17)‰(mean±SD), and δ15N ranged from(4.23±0.49)‰ to(12.44±0.09)‰. The δ13C and δ15N contents of A. japonicus, P. japonica and Fenneropenaeus chinensis were comparatively higher than those of other organisms. Values of δ13C and δ15N revealed that P. japonica, Hemigrapsus sanguineus and Neomysis japonica comprised the largest component of the diet of A. japonicus. The mean trophic level of the organisms in this saltwater pond polyculture system was(2.75±0.08). P. japonica, A. japonicus, F. chinensis, Synechogobius hasta and Neomysis japonica were in the 3rd trophic level(2-3); jellyfish, H. sanguineus and zooplankton were in the 2nd trophic level(1-2); and Enteromorpha prolifera, benthic microalgae, periphyton and suspended matter primarily consisting of phytoplankton, bacteria and humus were in the primary trophic level(0-1).
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