EXPERIMENTALLY PRODUCED ABNORMAL COILING AND ANALYSIS OF GROWTH IN GASTROPODS - ROLE OF DEVELOPMENTAL CONSTRAINT IN EVOLUTION -

腹足动物实验产生的异常卷曲和生长分析 - 发育约束在进化中的作用 -

• 批准号: 12640460
• 负责人: MORITA Rihito
• 金额: $ 1.02万
• 依托单位: NATURAL HISTORY MUSEUM AND INSTITUTE CHIBA
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12640460/
• 关键词: Gastropoda; Coiling growth; Head-Foot Mass; Computer Modeling; サザエ; 付着物; 巻き成長; コンピュータモデリング; 異常巻き; 巻きシミュレーション; 迂回反応; 足収縮筋の押し付け; C++プログラム; 発生的制約; 付着物反応; 飼育

Samples of Turbo cornutus were used to investigate how snail reacts to environmental disturbance like attachment of Oyster which blocks the normal course of the shell growth. In this project, silicon rubber balls were used as an obstacle. After one or two years, most of individuals succeeded in keeping their growth and the following patterns were induced as reaction to the attachment.1. With the rubber ball attached in upper part (on abapical side) of aperture overlap zone on the previous whorl, the shell growth changes downward and then returns back to upward after passing by the obstacle.2. With the rubber ball attached in lower part (on adapical side) of aperture overlap zone, the forward growth of the shell stops for a while the aperture expands outwards.These two patterns of the reaction to the obstacle suggest a certain role of the head-foot contact on the aperture margin. In order to test the role of the contact on the shell morphogenesis, a computer simulation has been performed for the shell morphogenetic model involving the head-foot contact on the aperture margin. Results of computer simulation of this model are as follows.1. Most popular model of coiling, regular and tight coiling, can be produced only by the head-foot contact on the aperture margin even if there is no intrinsic nature of coiled shell.2. The head-foot/aperture contact mechanism can simulate the reaction of the natural snail to the-obstacle attached on the previous whorl.All the experiments and computer simulations indicates that the head-foot contact mechanisms imposes the developmental constraints on the evolution of the shell coiling.

以角螺为材料，研究了环境干扰如牡蛎附着阻碍其正常生长时，螺的反应。在这个项目中，硅橡胶球被用作障碍物。1、两年后，大部分个体成功地保持了生长，并诱导出以下模式作为对依恋的反应.当橡胶球附着在前一个螺口重叠区的上部（背顶侧）时，贝壳生长向下变化，经过障碍物后又恢复向上.当橡皮球附着在小孔重叠区的下部（适应侧）时，贝壳的向前生长暂时停止，小孔向外扩张，这两种对障碍物的反应模式表明了头足接触对小孔边缘的一定作用。为了检验接触对贝壳形态发生的作用，对包含开口边缘头足接触的贝壳形态发生模型进行了计算机模拟。对该模型进行了计算机仿真，仿真结果如下：1.大多数流行的盘绕模型，规则和紧密的盘绕，即使没有盘绕壳的内在性质，也只能通过在孔径边缘上的头-脚接触来产生.头-足/孔接触机制可以模拟自然蜗牛对前一个螺体上附着的障碍物的反应，实验和计算机模拟表明，头-足接触机制对螺体盘绕的演化具有发育约束作用。

项目成果

森田利仁: "In 関村利朗, 野地澄晴, 森田利仁 (共編) 生物の形の多様性と進化 -遺伝子から生態系まで-"裳華房(印刷中). (2003)

森田俊仁：“关村俊郎、野寺纯春、森田俊仁（共同编辑）生命形式的多样性和进化——从基因到生态系统——”Shokabo（2003 年出版）。

352 (2003)

352（2003）

Morita, Rihito (eds.), Toshio Sekimura, Sumihare Noji, and Rihito, Morita (eds.): "Diversity in Pattern and Form of Biological Systems - From DNA to Ecological System(in Japanese)"Shokabo, Tokyo. 352 (2003)

Morita, Rihito（编辑）、Toshio Sekimura、Sumihare Noji 和 Rihito, Morita（编辑）：“生物系统模式和形式的多样性 - 从 DNA 到生态系统（日语）”Shokabo，东京。

Morita, Rihito: "In T.Sakimura, P.Maini and S.Noji (eds.) Proceedings of International Conference on Morphogenesis and Pattern Formation in Biological Systems"Springer-Verlag Tokyo(in press). (2003)

Morita, Rihito：“T.Sakimura、P.Maini 和 S.Noji（编辑）生物系统形态发生和模式形成国际会议记录”Springer-Verlag Tokyo（印刷中）。

Morita, Rihito, T. Sekimura, P. Maini, S. Noji(eds.): "Why do univalve shells of gastropods coil so tightly? - A head-foot guidance model of shell growth and its implication on developmental constraints, Proceedings of International Conference on Morphoge

Morita、Rihito、T. Sekimura、P. Maini、S. Noji（编）：“为什么腹足动物的单壳贝壳盘绕得如此紧密？ - 贝壳生长的头足引导模型及其对发育限制的影响，Proceedings of