Unraveling the feeding dynamics of Chinese mitten crab-based ecosystems using carbon and nitrogen stable isotope techniques
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The Chinese mitten crab (CMC) is an economically important species that consumers prefer mainly because of its delightful taste and aroma. The taste of CMC varies depending on its environmental conditions. Consumers prefer lake-sourced crabs to pond-cultured ones, but the production of crabs in lakes is greatly discouraged because of its adverse impacts on the local ecosystem. This study investigates the dynamics of the food web structure and trophic levels (TL) of both lake and pond ecosystems to apply the knowledge of the lake-cultured system to pond-cultured production using the stable isotope ratios of C and N. Furthermore, the TL was estimated and the IsoSource model was used for diet contribution estimates. The results show that the δ13C of the crab in the pond ecosystem (− 22.6 ± 0.3‰) was more enriched than that in the lake ecosystem (− 25.7 ± 0.4‰) indicating a clear distinction (P < 0.05) which is mainly influenced by their diet. The δ15N of the crab obtained from the lake ecosystem was higher (10.6 ± 0.1‰) than that in the pond ecosystem (8.6 ± 0.2‰), which is indicative of the nutritive value of the lake-culture crabs and consumers’ preference for this type. However, 15N compositions of the lake- and pond-cultured crabs did not differ significantly (P > 0.05), suggesting a similar TL. The crabs also occupied higher TL in both ecosystems under consideration, indicating a reliance of crab on the animal matter for food. This study provides more insights for all concerned stakeholders to make an informed decision with respect to the production and consumption of CMC.
KeywordsCrabs Pond culture Lake-stocked production Stable isotopes Consumer preference
The authors are grateful for the financial support from the National Natural Science Foundation of China (No. 51678272).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
- Gannes LZ, O’Brien DM, del Rio CM (1997) Stable isotopes in animal ecology: assumptions, caveats, and a call for more laboratory experiments. Ecology 78:1271–1276. https://doi.org/10.1890/0012-9658(1997)078%5b1271:SIIAEA%5d2.0.CO;2 CrossRefGoogle Scholar
- Hishamunda N, Subasinghe RP (2003) Aquaculture development in China: the role of public sector policies. Food and Agriculture Organization of the United NationsGoogle Scholar
- Knowles R, Blackburn TH (1993) Nitrogen isotope techniques. Academic Press, CambridgeGoogle Scholar
- Morato T, Encarnacion S, Grós M, Gui M (2003) Diets of thornback ray (Raja clavata) and tope shark (Galeorhinus galeus) in the bottom longline fishery of the Azores, northeastern Atlantic. Fishery Bull 101(3):590–602Google Scholar
- Persic A, Roche H, Ramade F (2004) Stable carbon and nitrogen isotope quantitative structural assessment of dominant species from the Vaccarès Lagoon trophic web (Camargue Biosphere Reserve, France). Estuar Coast Shelf Sci 60:261–272. https://doi.org/10.1016/J.ECSS.2004.01.009 CrossRefGoogle Scholar
- Peterson BJ, Fry B (1987) Stable isotopes in ecosystem studies. Annu Rev Ecol Syst 18:293–320. https://doi.org/10.1146/annurev.es.18.110187.001453 CrossRefGoogle Scholar
- Polis GA (2006) Food webs, trophic cascades and community structure. Aust J Ecol 19:121–136. https://doi.org/10.1111/j.1442-9993.1994.tb00475.x CrossRefGoogle Scholar
- Post DM (2002) Using stable isotopes to estimate trophic position: models, methods and assumptions. Ecology 83:703–718. https://doi.org/10.1890/0012-9658(2002)083%5b0703:USITET%5d2.0.CO;2 CrossRefGoogle Scholar
- Reuss NS, Hamerlík L, Velle G, Michelsen A, Pedersen O, Brodersen KP (2013) Stable isotopes reveal that chironomids occupy several trophic levels within West Greenland lakes: implications for food web studies. Limnol Oceanogr 58:1023–1034. https://doi.org/10.4319/lo.2013.58.3.1023 CrossRefGoogle Scholar
- Rodríguez-Gallego L, Meerhoff E, Poersch L, Aubriot L, Fagetti C, Vitancurt J, Conde D (2008) Establishing limits to aquaculture in a protected coastal lagoon: Impact of Farfantepenaeus paulensis pens on water quality, sediment and benthic biota. Aquaculture 277:30–38. https://doi.org/10.1016/j.aquaculture.2007.12.003 CrossRefGoogle Scholar
- Weimin M (2006) FAO Fisheries & Aquaculture - Cultured Aquatic Species Information Programme - Eriocheir sinensis (H. Milne-Edwards, 1853). http://www.fao.org/fishery/culturedspecies/Eriocheir_sinensis/en. Accessed 6 Oct 2018
- Wu X, Cheng Y, Zeng C et al (2009) Reproductive performance and offspring quality of Chinese mitten crab Eriocheir sinensis (H. Milne-Edwards) females fed an optimized formulated diet and the razor clam Sinonovacula constricta. Aquac Res 40:1335–1349. https://doi.org/10.1111/j.1365-2109.2008.02121.x CrossRefGoogle Scholar