Understanding of malformation and mal-pigmentation of Heterosomata, and development of prevention method for staining-type hyper-melanosis

2015 Fiscal Year Final Research Report

• Project/Area Number: 24580266
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: General fisheries
• Research Institution: Kyoto University
• Principal Investigator: TAGAWA Masatomo 京都大学, (連合)農学研究科(研究院), 准教授 (20226947)
• Research Collaborator: MATSUDA Taihei 道立総合研究機構, 栽培水産試験場, 主査 ; MIYAMA Yoshifumi 千葉水総研, 種苗生産研, 主任上席研究員
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: 形態異常 / カレイ類 / 二次黒化 / ホルモン / ストレス / 成長速度 / 有眼側化因子

Outline of Final Research Achievements

In heterosomata, the frequent occurrence of malformation and mal-pigmentation of juveniles is one of the most serious obstacles for efficient seed-production. This study was aimed to clarify the fundamental nature of the malformation and staining-type hyper-melanosis of the blind side.
By detailed analysis of malformation occurrence in red halibut, it is suggested that growth speed and stress independently affect the asymmetrical formation of the body and hyper-melanosis, respectively. The responsiveness of larval-type melanophores of barfin flounder against melanin-concentrating hormone suggested the larval nature of the blind side. In Japanese flounder, we preliminary found that stress stimulates, and uneven bottom prevents, the enlargement of staining type hyper-melanosis, respectively. In addition, presence of inducing substance(s) for ocular-side characteristics was suggested by transplantation experiment of scales.

Free Research Field

魚類生理学