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Title: ノリ殻胞子と単胞子の着生
Other Titles: Studies on Attachment of Conchospore and Monospore of Porphyra yezoensis
Authors: 右田, 清治
Authors (alternative): Migita, Seiji
Issue Date: Aug-1972
Publisher: 長崎大学水産学部
Citation: 長崎大学水産学部研究報告, v.33, pp.39-48; 1972
Abstract: Many ecological studies on the liberation of conchospores from Conchocelisthalli of Porphyra, had been reported in Japan. However, on the attachment of conchospores, only a few studies have been done. In this paper, the author observed the attaching mechanism of conchospores and monospores using Porphyra yezoensis as material, and also studied experimentally the physical factors affecting the both spores, such as light intensity, temperature, chlorinity and water current. The results obtained are summarized as follows: The conchospores liberated from Conchocelis-thalli were accompanied by a great quantity of mucilaginous substance, which helps the floating and adhesion of the spores. In experiments under various degrees of light intensity, the attachment of both conchospores and monospores was most abundant at 5,000~10,000 lux, and decreased under light intensity lower than 1,000 lux. In darkness both spores did not adhere to the substratum. The suitable temperature for spore attachment was 20~25℃, and the attaching ratio showed a remarkable decrease at low temperature such as 5~10℃. The optimal range of sea water chlorinity for attachment was between 14.5 and 18.6‰. Within the range from 0 to 90 cm/sec of water current, the number of attached spores was abundant at the rapid current. / ノリ殻胞子,単胞子の着生について,スサビノリを用いてそれらの着生機構を観察し,また着生と照度,温度、塩分および水流などとの関係をしらべた。1.殻胞子は放出にあたり多量の粘液を伴なっており,それは胞子の浮上,基物への接触を助長する。また,放出単胞子の粘液は少ない。2.着生に対する照度の影響では,殻胞子,単胞子ともに5,000~10,000luxで着生が多く,3,000lux以下の低照度では徐々に少なくなり,暗黒下ではほとんど着生しない。3.温度の影響では,両胞子とも20,25℃ で着生が良く,10℃ 以下では不良であった。4.塩分と着生の関係は,Cl14.5,18.6‰で着生数が多く,11.5‰以下では減少している。5.水流と着生の関係は,90cm/secまでの範囲で,水流の速いほど着生数は多くなっているが,その理由として高速では胞子の接触機会が多いためと思われる。
URI: http://hdl.handle.net/10069/31072
ISSN: 05471427
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:第33号

Citable URI : http://hdl.handle.net/10069/31072

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