Cold Tolerances of F<sub>1</sub> Tilapia Hybrids

WANG Mao-yuan; ZHONG Quan-fu; TIAN Tian; WU Mei-ying; HU Zhen-xi

doi:10.19303/j.issn.1008-0384.2016.08.011

Volume 31 Issue 8

Oct. 2016

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WANG Mao-yuan, ZHONG Quan-fu, TIAN Tian, WU Mei-ying, HU Zhen-xi. Cold Tolerances of F1 Tilapia Hybrids[J]. Fujian Journal of Agricultural Sciences, 2016, 31(8): 849-852. doi: 10.19303/j.issn.1008-0384.2016.08.011

Citation:

WANG Mao-yuan, ZHONG Quan-fu, TIAN Tian, WU Mei-ying, HU Zhen-xi. Cold Tolerances of F₁ Tilapia Hybrids[J]. Fujian Journal of Agricultural Sciences, 2016, 31(8): 849-852. doi: 10.19303/j.issn.1008-0384.2016.08.011

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Cold Tolerances of F₁ Tilapia Hybrids

doi: 10.19303/j.issn.1008-0384.2016.08.011

1.
Fujian Freshwater Fisheries Research Institute, Fuzhou, Fujian 350002, China
2.
China Tilapia Research System Fuzhou Comprehensive Experimental Station, Fuzhou, Fujian 350002, China

Received Date: 2016-04-18
Rev Recd Date: 2016-05-27
Publish Date: 2016-08-01

Abstract

Abstract

The tolerances of 3 F₁tilapia hybrids of Oreochromis niloticus(♀)×Oreochromis aureus(♂) to cold temperatures were studied.By artificially lowering the tank water temperature, the death rate, semi-lethal low temperature (LT₅₀), and cumulative survival rate of the fish were monitored to determine the abilities of the F₁ tilapia hybridsto survive in cold temperatures. There were significant differences in their cold tolerances among the 3 F₁ hybrids. Aiao began to die soon after the water temperature was reduced to 9.6℃, ranging from 9.6℃ to 7.5℃. For Xiang'ao, the lethal temperature ranged from 9.4℃ to 6.7℃; and, it was 8.9℃ to 6.3℃ for Jiao tilapia. LT₅₀ of Aiaowas 8.63℃; that of Xiang'ao, 8.23℃; and, that of Jiao, 7.60℃. It appeared that Jiao was a significantly more hardy tilapiathan either Aiao or Xiang'ao (P < 0.05).
- tilapia,
- F₁hybrid,
- cold tolerance,
- semi-lethal low temperature

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References(16)

References

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