Global patterns of diversification in the evolutionary history of the paedomorphic fish Schindleria (Gobioidei, Schindleriidae)

2014 Fiscal Year Final Research Report

• Project/Area Number: 23570109
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Biodiversity/Systematics
• Research Institution: Toho University
• Principal Investigator: KON Takeshi 東邦大学, 理学部, 訪問研究員 (10401192)
• Project Period (FY): 2011-04-28 – 2015-03-31
• Keywords: ハゼ亜目 / 魚類 / 隠蔽種 / 多様性 / 種分化 / 分子系統 / スーパーマトリクス法

Outline of Final Research Achievements

The extremely paedomorphic fish Schindleria (Gobioidei, Schindleriidae) includes one of the smallest and youngest reproducing vertebrates and is broadly distributed in the Indo-Pacific Oceans inhabiting coral reef lagoons. This study aimed to elucidate the evolutionary process of this tiny fish, by applying whole mitochondrial DNA (mtDNA) and three nuclear DNA genes sequencing, supermatrix analysis, divergence time and speciation rate estimations, and its ancestral habitat reconstruction. My results suggested that Schindleria was diverged from Oxymetopon at 30 Mya. Phylorate plots for speciation using the gobioid phylogeny showed that the speciation rate of Schindleria was not higher acceleration than the mean rate of all gobioids.

Free Research Field

海洋生物学