Sex determination and differentiation in <i>Aurelia</i> sp.1: the absence of temperature dependence -- Journal of Oceanology and Limnology,2018,36(2):457-464

	Cite this paper:
	LIU Chunsheng, GU Zhifeng, XING Mengxin, SUN Yun, CHEN Siqing, CHEN Zhaoting. Sex determination and differentiation in Aurelia sp.1: the absence of temperature dependence[J]. Journal of Oceanology and Limnology, 2018, 36(2): 457-464

Sex determination and differentiation in Aurelia sp.1: the absence of temperature dependence

LIU Chunsheng^1,2, GU Zhifeng^1,2, XING Mengxin³, SUN Yun^1,2, CHEN Siqing³, CHEN Zhaoting³

1 State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China;
2 Key Laboratory of Tropical Hydrobiogical Technology, Ocean College, Hainan University, Haikou 570228, China;
3 Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China

Abstract:

Cnidarians, being regarded as ‘basal’ metazoan animals, are considered to have relatively high plasticity in terms of sex reversal. In this study we used an experimental approach to demonstrate sexual differentiation and plasticity in benthic polyps and pelagic medusae of Aurelia sp.1 maintained at different temperatures. Results indicated that in Aurelia sp.1, sex differentiation has been determined at the polyp stage and that all medusae originating from a given polyp are, phenotypically, of the same sex. In addition, the sex of polyps budding from the same clone (either male or female) at different temperatures appears to be the same as that of the parent. The sex of medusae that had originated from a known-sex polyp was observed to remain the same as that of the parent, irrespective of differences in strobilation or rearing temperatures. These results indicate that the mechanism of sex determination of Aurelia sp.1. is not influenced by prevailing temperature regimes. A comparison of variability in terms of sexual plasticity of Aurelia sp.1 with that of Hydrozoa and Anthozoa suggests that species characterized by a free-swimming medusa life stage have a high dispersal potential, which probably results in a lower rate of sex reversal.

Key words: Aurelia sp.1|sex determination|temperature|sex differentiation

Received: 2016-06-24 Revised:

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Articles by CHEN Zhaoting

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