斑点叉尾鮰鱼苗对盐度的急性耐受力及行为反应研究

doi:10.16378/j.cnki.1003-1111.21198

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Abstract Acute salinity stress experiments in 24 h, 48 h and 96 h were carried out on channel catfish Ictalurus punctatus fry at different development stages, including the prolarva, 10 dph (days post hatching) fry and 30 dph fry. The effects of sub-lethal salinity and safe salinity of the fryat three development stageswere studied, and the limit salinity tolerance of the fryalso was comparedat each development stage. The results showed that the effect sub-lethal salinity both in 24 h and 48 h were 30 dphfry>10 dph fry>yolk sac fry, while sub-lethal salinity in 96 h was 30 dph fry>yolk sac fry>10 dph fry. The limiting salinity tolerance of fry at three development stages were 7.0, 4.0 and 9.0, respectively. Since the fry are weak after the yolk sac exhaustion and still need to go through the key period of 10 dph to 30 dph. The salinity of the stocking water body of the fry in the three stages should be controlled below 4.0, 4.0, 9.0, respectively. The results provide basic data for the scientific stocking of channel catfish fry in coastal beach areas.

Key words： Ictalurus punctatus stress sub-lethal salinity behavioral response

Received: 27 September 2021

S965.199

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	Articles by authors
	DUAN Yongqiang
	ZHANG Shiyong
	WANG Minghua
	ZHONG Liqiang
	BIAN Wenji
	CHEN Xiaohui

Cite this article:

DUAN Yongqiang,ZHANG Shiyong,WANG Minghua, et al. Acute Tolerance and Behavioral Responses of Channel Catfish Ictalurus punctatus Fry to Salinity[J]. Fisheries Science, 2023, 42(6): 1047-1053.

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https://www.shchkx.com/EN/10.16378/j.cnki.1003-1111.21198 OR https://www.shchkx.com/EN/Y2023/V42/I6/1047

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