Factors affecting the behaviour of crown-of-thorns starfish (Acanthaster planci L.) on the Great Barrier Reef: 2: Feeding preferences
Factors affecting the behaviour of crown-of-thorns starfish (Acanthaster planci L.) on the Great Barrier Reef: 2: Feeding preferences
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DOI：
10.1016/s0022-0981(97)00100-7
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发表时间：
1998-01-31
影响因子：
2
通讯作者：
Moran, PJ
中科院分区：
文献类型：
--
作者：
De'ath, G;Moran, PJ
1986 年 6 月至 1987 年 12 月期间，在大堡礁的 15 个珊瑚礁上研究了棘冠海星 Acanthaster planci (L.) 的摄食行为。通过对被捕食的珊瑚与其最近的邻近珊瑚进行成对比较，确定了棘冠海星对 10 个最常见属和 6 个最常见形式的石珊瑚的摄食偏好。使用一种新颖的方法（布拉德利-特里模型）对偏好进行量化，并显示出形成一个有序的层次结构。鹿角珊瑚属是最受欢迎的属，与最不受欢迎的滨珊瑚属相比，其受欢迎程度为 14:1。当以鹿角珊瑚为食时，A. planci 表现出对板状珊瑚的偏好超过其他形式。就所有属而言，板状形式比块状形式更受青睐，比例为 35:1，块状形式是最不受欢迎的形式，而分枝、次块状和叶状形式同样优选，比块状形式更受青睐，比例约为 7:1。属和形态的偏好被证明强烈依赖于板状和分枝形式的鹿角珊瑚，而不是类似形式的Montipora，但对于叶状和结壳形式，这种模式是相反的。研究表明，A. planci 在较大的珊瑚上花费的时间更长，其进食时间与珊瑚群直径的 0.72 次方成正比。根据群体大小调整了摄食偏好，对鹿角珊瑚的偏好普遍降低，在滨珊瑚的情况下为 8:1。与其他珊瑚相比，A. planci 对顶孔珊瑚的偏好随着顶孔珊瑚相对丰度的下降而适度下降。总体而言，这些发现在所有调查的珊瑚礁中都相对一致，这表明海星对特定类型和形式的珊瑚的偏好并没有受到海星密度或大小、一天中的时间或深度等因素的很大影响。 (C) 1998 Elsevier Science B.V.
The feeding behaviour of the crown-of-thorns starfish, Acanthaster planci (L.), was studied on fifteen reefs of the Great Barrier Reef between June 1986 and December 1987. Feeding preferences of A. planci for the ten most common genera and six most common forms of scleractinian corals were defined by pairwise comparisons of the corals being preyed upon and its nearest neighbouring coral. The preferences were quantified using a novel approach, the Bradley-Terry model, and shown to form a well-ordered hierarchy. Acropora was the most preferred genus, being favoured 14:1 over Porites, the least preferred. When feeding on Acropora, A. planci showed a preference for tabular corals over other forms. Taken over all genera, tabular forms were preferred 35:1 over massives, the least preferred form, and branching, submassive and foliaceous forms were equally preferable, being favoured about 7:1 over massives. Genera and form preference were shown to be strongly dependent with tabular and branching forms of Acropora preferred over similar forms of Montipora, but for foliaceous and encrusting forms, this pattern was reversed. A. planci were shown to spend longer on larger corals, with feeding times proportional to the colony diameter raised to the power of 0.72. Feeding preferences adjusted for colony size were estimated, and the preference for Acropora was generally reduced, in the case of Porites to 8:1. The preference of A. planci for Acroporidae over other corals decreased moderately with deceasing relative abundance of Acroporidae. Overall, these findings were relatively consistent across all reefs surveyed, suggesting that the starfish's preference for particular types and forms of corals were not greatly influenced by factors such as starfish density or size, time of day, or depth. (C) 1998 Elsevier Science B.V.