Page 206 - 《水产学报》2025年第7期

涂纹，等 水产学报, 2025, 49(7): 079615

Fighting behavior of Eriocheir sinensis and Procambarus clarkii under
different polyculture conditions

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TU Wen , HUANG Jin , LI Jinghao , WU Le , LI Jiayao 1,2,3* , XI Yewen 4
1. Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture and Rural Affairs,
Shanghai Ocean University, Shanghai 201306, China;
2. National Demonstration Center for Experimental Fisheries Science Education,
Shanghai Ocean University, Shanghai 201306, China;
3. Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai 201306, China;
4. Aquatic Technology Promotion Station of Anhui Province, Hefei 230000, China

Abstract: Eriocheir sinensis and Procambarus clarkii are two important economic aquatic products in China, the development
of the two ecological polyculture can not only make full use of the bait resources, but also promote the transformation from tra-
ditional culture model to modern culture model. However, in actual production, the attacking and fighting behavior caused by
problems such as breeding density, stocking size, sex ratio and other issues greatly reduce the survival rate of E. sinensis and P.
clarkii. Thus, in order to explore the key factors influencing the aggressive and fighting behaviors of E. sinensis and P. clarkii
under different polyculture conditions, several indoor behavioral observation experiments were carried out to analyze the effects
of size, density, gender on the fighting behavior between E. sinensis and P. clarkii. The results showed that the number of
attacks and fights between E. sinensis and P. clarkii increases as their size increases. When the size of E. sinensis and P. clarkii
are different, the size of E. sinensis showed a significant role in the intensity of their fighting. The bigger E. sinensis get, they
attacked and fought with each other more frequent. In polyculture mode, light had no significant effect on their fighting beha-
vior. As the density of P. clarkii increased, the frequency and intensity of fights first increased and then decreased. There was a
positive correlation between the content of lactic acid in hemolymph and cheliped muscle and the times of fighting The male of
E. sinensis and P. clarkii are more aggressive, as male fights more than female at all density groups. In conclusion, in the prac-
tice of polyculture, the culture density and size of E. sinensis had a significant effect on fighting behavior, the traditional mode
which releasing P. clarkii before E. sinensis can reduce the coexistence time of large E. sinensis and P. clarkii, thus mitigating
the impact of fighting between E. sinensis and P. clarkii. Meanwhile, a proper gender proportion and feeding management can
alleviate the cannibalism between E. sinensis and P. clarkii. This study can provide some theoretical guidance and reference for
practical production.
Key words: Eriocheir sinensis; Procambarus clarkii; polyculture conditions; fighting behavior; behavioral observation
Corresponding author: LI Jiayao. E-mail: jy-li@shou.edu.cn
Funding projects: National Key Research and Development Program of China (2019YFD0900304); Science and Technology
Project of Social Development from Shanghai Municipal Science and Technology Commission (21DZ1201900); China Agri-
culture Research System of MOF and MARA (CARS-48)

中国水产学会主办 sponsored by China Society of Fisheries https://www.china-fishery.cn
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