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Effects of photoperiod on growth performance and melanogenesis pathway for skin pigmentation of Malaysian red tilapia

文献类型： 外文期刊

作者： Malambugi, Atuganile 1 ; Yu, Zhenzhen 3 ; Zhu, Wenbin 4 ; Wang, Lanmei 4 ; Song, Feibiao 1 ; Limbu, Samwel Mchele 5 ;

作者机构： 1.Nanjing Agr Univ, Wuxi Fisheries Coll, Wuxi 214081, Jiangsu, Peoples R China

2.FETA, Bagamoyo, Tanzania

3.Shanghai Ocean Univ, Coll Fisheries & Life Sci, Shanghai, Peoples R China

4.Minist Agricultureand Rural Affairs, Freshwater Fisheries Res Ctr, Chinese Acad Fisheries Sci, Key Lab Freshwater Fisheries & Germplasm Res Util, Wuxi, Jiangsu, Peoples R China

5.East China Normal Univ, Sch Life Sci, LANEH, Shanghai, Peoples R China

6.Univ Dar Es Salaam, Dept Aquat Sci & Fisheries Technol, Dar Es Salaam, Tanzania

关键词： cysteine; growth; melanogenesis; photoperiod; red tilapia; tyrosine

期刊名称：AQUACULTURE RESEARCH （ 影响因子：2.082； 五年影响因子：2.415 ）

ISSN： 1355-557X

年卷期： 2020 年 51 卷 5 期

页码：

收录情况： SCI

摘要： Farming of red tilapia is increasing rapidly. However, its commercial farming development is challenged by lack of clear information on genetic basis for skin colour and pigmentation differences due to environmental changes. This study investigated the effects of photoperiod (light:dark, L:D) on the growth and skin colour variation of Malaysian red tilapia. A total of 180 fish weighing 150.48 +/- 0.44 g were reared under natural photoperiod (13L:11D, control), prolonged lightness (24L:0D) and prolonged darkness (0L:24D) in three replicates for 78 days. The weight gain of fish cultured under both prolonged light and darkness were significantly higher than fish under natural photoperiod. The tyrosinase level in ventral skin was significantly higher for fish cultured under prolonged darkness condition than in the other two photoperiod regimes. Contrary, the cysteine level in the dorsal skin was significantly higher in the fish cultured under natural photoperiod than in prolonged light and darkness. The relative mRNA expressions of SRY-related HMG-Box 10 (sox 10), tyrosine (tyr), tyrosine-related protein 1 (tyrp-1) and solute carrier family 7 member 11 (slc7a11) genes were significantly higher in ventral skin of fish under prolonged darkness than the other two photoperiods. This study demonstrates that photoperiod has an impact on melanogenesis and growth of red tilapia. Understanding the effects of photoperiod on genetic basis of red tilapia will help in selective breeding programme of the important economic traits for the development of commercial red tilapia farming.

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