Acta Agriculturae Zhejiangensis ›› 2022, Vol. 34 ›› Issue (11): 2404-2415.DOI: 10.3969/j.issn.1004-1524.2022.11.10

• Animal Science • Previous Articles     Next Articles

Effects of different diets on growth performance and environmental water quality of Scylla paramamosain cultured in carb apartment

CAI Yilong1(), ZHANG Libing2, HU Gaoyu1, XIAO Guoqiang1, CAI Jingbo1, ZHANG Xiang*()   

  1. 1. Zhejiang Key Laboratory of Exploitation and Preservation of Coastal Bio-Resource, Wenzhou Key Laboratory of Marine Biological Genetics and Breeding, Zhejiang Mariculture Research Institute, Wenzhou 325005, Zhejiang, China
    2. Yueqing Agricultural and Rural Bureau, Yueqing 325699, Zhejiang, China
  • Received:2022-03-02 Online:2022-11-25 Published:2022-11-29
  • Contact: ZHANG Xiang

Abstract:

To study the effects of different baits on growth performance and feeding environment of Scylla paramamosain in crab apartment, the growth and environmental water quality parameters of S. paramamosain during aquaculture were analyzed by feeding different baits (Sinonovacula constricta, fresh fish meat, compound feed for green crab and eel compound feed). The results showed that the specific growth rate of S. paramamosain in S. constricta group was the highest (1.15%·d-1), followed by the eel feed group (0.56%·d-1). Besides the S. constricta group, the specific growth rate of other bait groups were significantly correlated with pH, dissolved oxygen and ammonia nitrogen, etc. In terms of survival rate, there was no significant correlation between S. constricta group and water quality indexes, fish group was only significantly correlated with phosphate and nitrite, and significant correlation between two artificial compound diets and active phosphate, suspended particulate matter, dissolved oxygen, pH, nitrite and other indexes. In addition to water temperature and salinity, water quality was mainly affected by feeding. The comprehensive pollution index of water quality showed that the four bait groups were in the state of pollution and environmental eutrophication (NQI≥8.5), but the eutrophication degree of S. constricta group was the lowest. The results showed that S. constricta was the best bait for crab apartment breeding, and the green crab fed by S. constricta had higher growth performance and better breeding water environment. Considering the breeding cost, compound feed was also suitable for green crab breeding in crab apartment, but the water quality of feeding environment needed to be further improved. The result provided a technical basis for the selection of bait and the optimization of management measures in the facility culture of S. paramamosain.

Key words: crab apartment, Scylla paramamosain, growth performance, feeding environment, water quality indicator

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