Study on industrialized breeding of Ictalurus punctatus in Ningxia

  • WANG Yuanji1 ,
  • SAI Qingyun2 ,
  • LI Yongjun2 ,
  • WANG Yan2
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  • (1 Stock Seed Farm of Ningxia, Helan 750200, Ningxia, China;
    2 Ningxia Fishery Institute, Yinchuan 750001, Ningxia, China)

Online published: 2018-12-11

Abstract

In order to explore the suitable conditions for artificial breeding technology of Ictalurus punctatus in Ningxia, specific to technical requirements for artificial breeding and seed rearing, some experiments, for example, effects of different oxytocin combinations and artificial parent fish combinations on reproduction rate, hatching temperature on hatching rate of fertilized eggs and seed rearing experiment in that year of Ictalurus punctatus were carried out. The result showed that the use of oxytocic drugs enabled the Ictalurus punctatus to spawn in relatively concentrated time when the water temperature was 23.5℃, and the combination of drugs was better than the use of a single drug to spawn, but the effect was not obvious. Compared with natural spawning in ponds, artificial spawning could increase the spawning rate of parent fish, the optimum incubation temperature for fertilized eggs was 24℃~26℃, and the suitable spawning temperature was 23℃~27℃. Seed rearing experiment showed that the one-year-old seed grew fast, and from larva to one-year-old seed, the optimum stocking density of the Ictalurus punctatus was 375 000- 450 000 fishes/hm2 in Ningxia.

Cite this article

WANG Yuanji1 , SAI Qingyun2 , LI Yongjun2 , WANG Yan2 . Study on industrialized breeding of Ictalurus punctatus in Ningxia[J]. Fishery Modernization, 2018 , 45(5) : 31 . DOI: 10.3969/j.issn.1007-9580.2018.05.006

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