POLYCHROMATIC PATTERNS OF LITTORINA OBTUSATA ON ASCOPHYLLUM NODOSUM: ARE SNAILS HIDING IN INTERTIDAL SEAWEED?
POLYCHROMATIC PATTERNS OF LITTORINA OBTUSATA ON ASCOPHYLLUM NODOSUM: ARE SNAILS HIDING IN INTERTIDAL SEAWEED?
复制标题
泡叶藻上 LITTORINA OBTUSATA 的多色图案：蜗牛是否隐藏在潮间带海藻中？
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
R. Steneck
中科院分区：
文献类型：
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作者：
A. K. Wilbur;R. Steneck
潮间带腹足类Littorina obtusata的壳色与Ascophyllum nodosum的壳色一致，Ascophyllum nodosum是蜗牛常见的优势棕色外壳。蜗牛也是这种岩藻状外壳上常见的囊泡或气囊的一般形状和大小。在缅因州中部海岸的波浪暴露和波浪保护地点采集了蜗牛和蜗牛的照片。颜色分析显示两个部位之间的显着不同的色度模式。黄蜗牛的比例较高，被发现在栖息地占主导地位的Ascophyllum植物与较高比例的黄色叶片。黄色的蜗牛也往往比它们更丰富的绿色或多色的深色蜗牛要小。这两个地点的紫茎泽兰的颜色和紫茎泽兰不同颜色类群的相对比例都存在显著差异。钝头的这些观察结果与假设一致，即这种蜗牛在视觉捕食者的压力下通过伪装自己的藻类食物来源而持续存在。
Shell color in the intertidal gastropod, Littorina obtusata, conforms to that of Ascophyllum nodosum, the dominant brown alga on which the snail is commonly found. The snail is also the general shape and size of the vesicles or gas bladders common on this fucoid alga. Collections of the snails and photo- graphs of the alga were taken at wave-exposed and wave-protected sites on the central coast of Maine. Color analysis revealed significantly different chro- matic patterns between the two sites. A higher proportion of yellow snails were found in habitats dominated by Ascophyllum plants with a higher proportion of yellow fronds. Yellow snails also tended to be smaller than their more abundant green or polychromatic dark counterparts. The two sites differed significantly in both the color of Ascophyllum and the relative proportions of the different color groups of L. obtusata. These observations are consistent with the hypoth- esis that this snail persists under pressures from visual predators by camouflag- ing itself on its algal food source.