Mechanisms for substrate preference by corals

珊瑚对基质的偏好机制

• 批准号: 04454010
• 负责人: YAMAZATO Kiyoshi
• 金额: $ 3.58万
• 依托单位: University of the Ryukyus
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04454010/
• 关键词: Pocillopora; Planula larvae; Substrate preference; Sediment rejection; Beach sand; Red soil; Calcareous plate; Biofilm; ショウガサンゴ; プラヌラ; トゲサンゴ; 底質選択行動; 堆積排除能力; イシサンゴ; サンゴ幼生; 堆積粒子排除; 赤土粒子; 石灰質粒子; 群体成長と底質; 赤色粘土粒子

Many researches were done on subustrate preference by corals, but almost none of them included particulate deposits. On the other hand, corals are capable of removing the particles falling on them by cilia and mucus. This is a study on the mechanisms of selecting the grain types and sizes.Pocillopora damicornis and Stylophora pistillata are main animals used. Beach sand and red terrestrial soil are the main types of substrates. They were sieved into different grain sizes before use.The reproduction of P.damicornis were ascertained first to take place in May-December, once a month during first quarterfull moon periods. The settling rate of P.damicornis was found to be 7.1%, whereas, that of S.pistillata 51.7%. On the contrary to general trends that coral planulae prefer biologically treated substrate, the planulae of P.damicornis orefered nontreated over treated substrate. Preference of these planulae for beach sand was in the following order : 0.5mm>1mm>5mm>2mm>calcareous plate. The beach sand and red soil of less than 0.25 mm did not attract any planulae. Red soil of larger particles did the same. A few particles smaller than the diameter of planulae aggregated to support one planula. Coral polyps were not able to reject red soil of less than 0.25 mm across, probably by acting as a barrier for gas exchange. The same reason may be applied to the inablity to attract plamulae settlement by this size particles.

珊瑚对底质的偏好性研究很多，但几乎没有涉及颗粒沉积物的研究。另一方面，珊瑚能够通过纤毛和粘液去除落在它们身上的颗粒。本文主要研究了红角泡孔珊瑚和雌蕊柱花草对水稻籽粒类型和粒度的选择机理。基质类型以海滩砂和红壤为主。结果表明，黄角拟步行虫的繁殖期为5 ~ 12月，即正月十五期间每月一次。黄角海蜇的沉降率为7.1%，而雌蕊海蜇的沉降率为51.7%。与珊瑚浮游虫偏好生物处理基质的一般趋势相反，珊瑚浮游虫更偏好未处理的基质。这些浮浪对海滩砂的偏好顺序为：0.5mm> 1 mm> 5 mm> 2 mm>钙质板。小于0.25 mm的海滩砂和红壤不吸引浮浪。颗粒较大的红壤也是如此。一些小于浮浪直径的颗粒聚集在一起支撑一个浮浪。珊瑚虫不能拒绝直径小于0.25毫米的红土，可能是作为气体交换的障碍。同样的原因可能适用于这种尺寸的颗粒无法吸引原生质沉降。

项目成果

Glynn,K.,K.Yamazato: "Experimental responces of Okinawan(Ryukyu Islands,Japan)reef corals to high sea tenperature and UV radiation." Proc.7th Int.Coral Reef Symp.,Guam. Vol.1. 27-37 (1992)

Glynn,K.,K.Yamazato：“冲绳（日本琉球群岛）珊瑚礁对高海水温和紫外线辐射的实验反应。”

Nakano, Y., K.Yamazato, S.Iso: "Responses of Okinawan reef building corals to experimental high splinity" Proc.7th Int.Coral Reef Symp., Guam. Vol.1. 308 (1992)

Nakano, Y.、K.Yamazato、S.Iso：“冲绳造礁珊瑚对实验性高 Splinity 的反应”Proc.7th Int.Coral Reef Symp.，关岛。

Glynn.K., K.Yamazato: "Experimental responces of Okinawan (Ryukyu Islands, Japan) reef corals to high sea tenperature and UV radiation" Proc.7th Int.Coral Reef Symp., Guam. Vol.1. 27-37 (1992)

Glynn.K.、K.Yamazato：“冲绳（日本琉球群岛）珊瑚礁珊瑚对高海水温和紫外线辐射的实验反应”Proc.7th Int.Coral Reef Symp.，关岛。

Yamazato, K., M.Sai, Y.Nakano: "Sexual reproduction of Okinawan corals Stylophora pistillata (Espen) and Seriatopora hystrin (Dana)" Proc.7th Int.Coral Reef Symp., Guam. Vol.1. 504 (1992)

Yamazato, K.、M.Sai、Y.Nakano：“冲绳珊瑚 Stylophora pistillata (Espen) 和 Seriatopora hystrin (Dana) 的有性繁殖”Proc.7th Int.Coral Reef Symp.，关岛。

Yamazato, K., Y.Isa: "Effect of gravity on the sheleto genetis of corals I.Gravity dependence of the settlement and metamorphosis" Proc.9th Space Utilization Symposium. 105-107 (1992)

Yamazato, K., Y.Isa：“重力对珊瑚的 sheleto 遗传的影响 I. 沉降和变态的重力依赖性”Proc.9th 空间利用研讨会。