Length and spacing of the tube feet in crinoids (echinodermata) and their role in suspension-feeding
Length and spacing of the tube feet in crinoids (echinodermata) and their role in suspension-feeding
复制标题
海百合（棘皮动物）管足的长度和间距及其在悬浮喂养中的作用
DOI：
10.1007/bf00389214
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发表时间：
1979
期刊：
影响因子：
2.4
通讯作者：
D. L. Meyer
中科院分区：
文献类型：
--
作者：
D. L. Meyer
利用水下近距离拍摄的管足照片，对采自大堡礁帕劳群岛和吕宋岛珊瑚礁的15种海百合的原生管足形态进行了研究。管脚的长度和它们的间距沿着羽片的测量从这些照片。管足科的物种有0.75毫米的平均长度和6管足mm-1的平均间距。在相同环境中出现的非combordd物种的管脚的平均长度为0.55毫米，平均间距约为8管脚mm-1。帕劳和吕宋岛样品的管足间距与管足长度的关系均达到极显著水平（P<0.01）。物种有更长和更广泛的管脚生活部分隐藏在珊瑚礁的基础设施和举行的武器和小羽片在一个多方向的姿态。物种有较短的和更紧密的管脚栖息在顶部的珊瑚礁尖塔或alcyonarians和形成平面过滤风扇正常单向电流或波振荡。在珊瑚礁基础设施内居住的物种中，更长、更宽的管脚在缓慢、蜿蜒的水流中提供了更有效的过滤。在暴露于近主流流的物种中，管脚的更紧密间距在更高流速下提供更有效的过滤机制。这些物种的管脚长度减少可能是小羽片间距较近的结果。这些共同出现的物种的管脚的间距和长度的分化意味着在食物颗粒捕获的分化。在某些情况下，这可以构成资源划分。生活习性重叠的物种，多数在管足间距和长度上存在显著差异。
The morphology of the primary tube feet in 15 species of comatulid (unstalked) crinoids from coral reefs in the Palau Islands and Lizard Island, Great Barrier Reef, was investigated using close-up underwater photographs of the tube feet taken in the natural habitat. Measurements of length of the tube feet and their spacing along the pinnule were taken from these photographs. Tube feet of species of the family Comasteridae have a mean length of 0.75 mm and a mean spacing of 6 tube feet mm-1. Tube feet of non-comasterid species occurring in the same environments have a mean length of 0.55 mm and a mean spacing of about 8 tube feet mm-1. The relationship between spacing and length of the tube feet is highty significant for both the Palau and Lizard Island samples (P<0.01). Species having longer and more widely spaced tube feet live partly concealed within the infrastructure of the reef and hold the arms and pinnules in a multidirectional posture. Species having shorter and more closely spaced tube feet perch on top of reef pinnacles or alcyonarians and form planar filtration fans normal to unidirectional currents or wave oscillations. Longer and more widely spaced tube feet in species dwelling within the reef infrastructure provide more efficient filtration in the slow, meandering flow prevailing there. Closer spacing of the tube feet in species exposed to near-mainstream flow provides a more efficient filtration mechanism at higher flow velocities. Reduced length of the tube feet in these species may be a consequence of closer spacing of the pinnules. Differentiation of these co-occurring species in spacing and length of the tube feet implies differentiation in food particles captured. This may in some cases constitute resource partitioning. Most species which overlap in living habits are significantly different in spacing and length of the tube feet.