濾過食性固着生物と共生するウグイスガイ上科二枚貝の生態と進化

京都大学0048新制・課程博士博士(人間・環境学)甲第17668号人博第635号新制||人||153(附属図書館)24||人博||635(吉田南総合図書館)30434京都大学大学院人間・環境学研究科相関環境学専攻(主査)教授 加藤 眞, 教授 松井 正文, 准教授 市岡 孝朗学位規則第4条第1項該当Doctor of Human and Environmental StudiesKyoto UniversityDA

Diagram showing the architecture of the aquiferous system of <i>Spongia</i> (<i>Spongia</i>) sp.

<p><i>Black canals</i> = incurrent; <i>white canals</i> = excurrent; <i>dotted areas</i> = choanocyte chambers.</p

Photographs of the dye movement experiment.

<p>A. Fluorescent dye dropped into the inhalant area of the bivalves. B. Dropped fluorescent dye first inhaled into the bivalve’s body, and then exhaled from specific sponge oscula.</p

SEM micrograph and drawing of canal replica of <i>Spongia</i> (<i>Spongia</i>) sp.

<p>A. Scanning electron microscope (SEM) micrograph of sponge surface area showing the superficial network of incurrent canals (sn) connected with main incurrent ducts (ic); scale bar = 500 µm. B. Side-view drawing of the sponge surface incurrent area; scale bar 500 = µm. C. SEM micrograph showing a clump of choanocyte chambers (cc, arrows) and excurrent canals (ec) forming an anastomosed framework; scale bar = 100 µm. D. SEM micrograph of anastomosed excurrent canals leading to an osculum (os). E. Photograph of a dissected sponge, in which a bivalve was unfastened and moved to the left so that the opening of the excurrent canal can be seen (arrows). F. Side-view drawing of the incurrent system facing a bivalve’s exhalant area. Arrows correspond to the holes in Fig. 4E.</p

Summary of direct observations of movement of fluorescent dye dropped at the inhalant region of bivalves.

<p>Summary of direct observations of movement of fluorescent dye dropped at the inhalant region of bivalves.</p

Correlation between shell length and pumping rate of <i>V. vulsella</i> (N = 43).

<p>Correlation between shell length and pumping rate of <i>V. vulsella</i> (N = 43).</p