Distribution of superficial neuromasts in percomorph fishes

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K06810
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 45030:Biodiversity and systematics-related
• Research Institution: Kochi University
• Principal Investigator: Sasaki Kunio 高知大学, 教育研究部自然科学系理工学部門, 教授 (10215717)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: スズキ系魚類 / 側線系 / 神経支配 / 感丘 / 表在感丘 / 分布 / 相同性 / 適応進化

Outline of Final Research Achievements

In this study, the lateral line system is examined in several species of Percomorpha to discuss morphological, ecological, and phylogenetic significances of the morphological diversity of the system, having been leading to the following results: (1) estimation of non-derivative condition of the system for the percomorphs, (2) homology assessments of neuromast elements among percomorph taxa based on the innervation pattern of the system, (3) showing of a morphological diversity of the system in the caudal fin, (4) a case that an interspecific difference of the system is ascribed to difference of the body size was shown, and (5) a functional significance of the specialized lateral line system of Nurseryfish was proposed based on SEM observations. These results revealed representative aspects of the morphological diversities of the system which are assumed to associated with ecological and phylogenetic backgrounds of the percomorphs.

Free Research Field

動物形態学

Academic Significance and Societal Importance of the Research Achievements

魚類の種や生態が多様化する過程で，各々の感覚器官（側線系）も形態的に変化し，種間で分化したことを具体的に示す成果である．これは，どうして魚類が様々な環境に進出可能であったか・どうして様々な生態的特徴をもつ種へと分かれるに至ったかという問いに対して，感覚器官の多様化という観点から答えるという意義がある．