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題 名 | Burrow Architecture of the Spionid Polychaete Polydora villosa in the Corals Montipora and Porites=多毛類才女蟲在表孔珊瑚和微孔珊瑚內之蟲穴結構 |
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作 者 | 劉弼仁; 謝蕙蓮; | 書刊名 | 動物研究學刊 |
卷 期 | 39:1 2000.01[民89.01] |
頁 次 | 頁47-54 |
分類號 | 386.695 |
關鍵詞 | 才女蟲多毛類; 蟲穴形態; 珊瑚; Polydorid polychaete; Burrow morphology; Coral; |
語 文 | 英文(English) |
中文摘要 | 在澎湖青灣海域的珊瑚礁,管棲性的青灣才女蟲(Polydora villosa)棲息在活珊瑚體內,開口突出於珊瑚表面。珊瑚骨骼切片及X-rays照相顯示,團塊形微孔珊瑚(Porites spp.)和樹技形表孔珊瑚(Montipora spp.)內的蟲穴可分成兩部份:U形的蟲槽和直條形的延伸蟲道。由縱切和橫切的骨骼標本顯示,延伸蟲道有一層碳酸鈣壁包覆泥質蟲管,但U形蟲槽只有珊瑚的網狀骨骼。由U型蟲槽和延伸蟲道周圍的珊瑚骨骼結構及鈣質骨骼堆積的連續性和同質性的分析,以及在解剖顯後鏡和電子顯微鏡下的觀察顯示,U型蟲槽具有蝕刻的痕跡,研判U型蟲槽是蟲體鑽入珊瑚所形成,而延伸蟲道則是珊瑚附著在蟲體所築的泥質蟲管上生長所形成。此外,蟲穴的構造在不同的珊瑚種類上亦有差異,包括延伸蟲道的分枝數目,延伸蟲道的長度及碳酸鈣壁的厚薄等。這些差異是導因於宿主珊瑚種類的不同。 |
英文摘要 | The spionid polychaete, Polydora villosa, is found only in living corals in the Penghu Archipelago, Taiwan. Polydora villosa builds burrows inside the coral skeleton and secretes mucus to form fragile mud-tubes in the burrows with openings projecting approximately 2 mm above the coral surface. X-ray radiographs of sections of the branching-shaped corals, Montipora angulata, M. hispita, and M. informis, and of the massive-shaped corals, Porites lichen, P. lobata, and P. lutea, have revealed that the burrows consist of 2 parts: a narrow, U-shaped passage and several straight, elongated tunnels. The U-shaped passages are located at the ends of the burrows, and the straight elongated tunnels are at the free, open end. Longitudinal and transverse sections of the burrows reveal that the straight elongated tunnels are encircled by a thick layer of calcium carbonate, but the U-shaped passages are not. The U-shaped passages directly intersect the growth direction of the corals, and the surfaces of the passages show traces of etching as examined under a scanning electron microscope. This suggests that the U-shaped passages are formed initially by Polydora villosa through active boring into the coral. At a later stage, the elongated tunnels are formed when the corals grow concurrently with the tube construction of Polydora villosa, indicating that the formation of burrows is passive at this time. The straight elongated tunnels are simple in Porites, but are branched in Montipora, whereas tunnel lengths are shorter in Porites than in Montipora. The branched morph of Montipora is often inhabited by Polydora villosa. We speculate that interactions between the coral Montipora and the worms may result in modification of the growth form of Montipora from an encrusting or columnar morph to a branched one. In contrast, the shape of Porites is not affected by the worm and retains its original massive form. |
本系統中英文摘要資訊取自各篇刊載內容。