Studies on evolution of mating system and sexuality, and pituitary peptide hormone in fish

2015 Fiscal Year Final Research Report

• Project/Area Number: 24370006
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Ecology/Environment
• Research Institution: Tokyo University of Marine Science and Technology
• Principal Investigator: Sunobe Sunobe 東京海洋大学, その他部局等, 准教授 (00250142)
• Co-Investigator(Kenkyū-buntansha): KUNIYOSHI Hisato 広島大会, 生物圏科学研究科, 准教授 (60335643) ; SAKAI Youichi 広島大会, 生物圏科学研究科, 教授 (70309946)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: 行動生態 / 内分泌

Outline of Final Research Achievements

We studied relationship between mating system and sequence of promoter of pituitary peptide hormone, arginine vasotocin (AVT) and isotocin (IT) in the gobiid genera Trimma and Priolepis, which comprise a monophyletic group. Mating system was identified as monogamy in five and polygyny in seven species. Although we determined sequences of three monogamous and two polygynous species, we did not find any difference in sequences between species of these mating systems. However, there was a deletion in the sequence of Trimma marinae. As this species is a gonochore and the other four species are bidirectional sex changers, this difference implies that VT has a promoter related to sex change.

Free Research Field

行動生態学