Impact of salinity of the black-chinned tilapia

The euryhaline black-chinned tilapia (Sarotherodon melanotheron) exploits a wide salinity range in Western Africa (Senegal, Gambia), with some populations living in fresh water, brackish and seawater habitats but also hypersaline habitats in, e.g., the inverse Saloum estuary. In the upper reaches of the Saloum, salinity can be three times that of sea water during the dry season. This salinity gradient has its origin in the Sahelian droughts of the 1960s and 1970s and the species had to adapt hypersalinity during this period. RADseq data from six populations sampled in 2006 are provided in order to investigate the genetic population structure of this species along the whole salinity gradient and to detect SNPs that might be associated with salinity variation.

广盐性黑颏口孵非鲫（Sarotherodon melanotheron）在西非（塞内加尔、冈比亚）栖息于跨度极广的盐度环境中：部分种群可存活于淡水、咸淡水与海水生境，同时也能在高盐生境中生存，例如逆萨卢姆河口。在萨卢姆河上游区域，旱季时盐度可达海水的三倍。该盐度梯度起源于20世纪60至70年代的萨赫勒干旱事件，该物种在此期间被迫适应高盐环境。本数据集提供了2006年采样的6个种群的RADseq数据，用于解析该物种沿完整盐度梯度的种群遗传结构，并筛选可能与盐度变异相关的单核苷酸多态性（Single Nucleotide Polymorphisms，SNPs）。