Volume 17 Issue 3
Jun.  2021
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HUANG Guoqiang, CAO Suhui, LIU Xujia, PENG Yinhui, LIU Yonghong, HUANG Lianghua, ZHONG Shengping. A preliminary study on enrichment of stable isotope from diets by mud crab (Scylla paramamosain)[J]. South China Fisheries Science, 2021, 17(3): 19-26. DOI: 10.12131/20200227
Citation: HUANG Guoqiang, CAO Suhui, LIU Xujia, PENG Yinhui, LIU Yonghong, HUANG Lianghua, ZHONG Shengping. A preliminary study on enrichment of stable isotope from diets by mud crab (Scylla paramamosain)[J]. South China Fisheries Science, 2021, 17(3): 19-26. DOI: 10.12131/20200227
shu

A preliminary study on enrichment of stable isotope from diets by mud crab (Scylla paramamosain)

  • 1.

    Institute of Marine Drug, Guangxi University of Chinese Medicine, Nanning 530200, China

  • 2.

    Guangxi Academy of Sciences/Guangxi Key Laboratory of Marine Environmental Science/Guangxi Beibu Gulf Marine Research Center, Nanning 530007, China

  • 3.

    Ocean College, Beibu Gulf University/Guangxi Key Laboratory of Beibu Gulf Marine Biodiversity Conservation, Qinzhou 535011, China

More Information
  • Received Date: October 25, 2020
  • Revised Date: January 17, 2021
  • Accepted Date: January 25, 2021
  • Available Online: February 06, 2021
    Graphical Abstract
    • Abstract
  • Stable isotope analysis technology has become an important means in the study of nutrition sources in ecology, but the premise is to obtain the data of stable isotope enrichment effect of animals in different diets. In this experiment, Acentrogobius caninus, Callionymus richardsoni, Metapenaeopsis barbata, Ruditapes philippinarum, Perinereis nuntia and cultured P. aibuhitensis were collected from mangroves and adjacent beaches and used as baits to feed Scylla paramamosain for 66 d. The results indicate that R. philippinarum, P. aibuhitensis and M. barbata had better culture effects on S. paramamosain. The stable isotope abundances of δ13C and δ15N in the six natural diets were obviously higher than that in initial crabs. Compared with the initial crabs, the contents of stable isotope δ13C and δ15N of final crabs increased significantly. The enrichment effects of the 13C (∆13C) were 0.7, −0.19, 0.22, 2.58, −0.12 and 2.75 for the six diets, respectively, while the ∆15N varied from −2.98 to 0.21. Most of these values were inconsistent with the judgment baselines (discrimination) of direct predator and prey, which were 0‰−1‰ for ∆13C and 3‰−4‰ for ∆15N, respectively. This may be due to the huge difference of stable isotope enrichment between beach dwelling organisms and land organisms. It is also possible that low water temperature, slow growth and low weight gain rate of S. paramamosain at later stage of the experiment lead to insufficient renewal of carbon and nitrogen in the body.
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    • References (31)
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