Color pattern variation in a shallow-water species of opisthobranch mollusc.
Color pattern variation in a shallow-water species of opisthobranch mollusc.
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浅水后鳃类软体动物的颜色图案变化。
DOI：
10.1086/bblv224n1p35
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Dupont,Anne
中科院分区：
文献类型：
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作者：
Valdes,Angel;Ornelas-Gatdula,Elysse;Dupont,Anne
底栖后鳃海蛞蝓（软体动物门：腹足纲）的颜色模式似乎起着重要的防御作用，许多物种似乎有警戒（警告）着色。颜色模式是后鳃识别的一个重要特征，这一结论是基于大多数物种具有有限的颜色变化的假设。对于那些颜色变化被认可的物种，变化的原因仍然未知。在本文中，我们研究Philinopsis pusa，一种底栖推定的后鳃海蛞蝓与广泛的颜色模式。较轻的个体似乎被困在白色沙滩环境中，而较深的个体似乎与它们的背景明显不同。由于其广泛的颜色变化，P. pusa已被细分为不同的物种。在巴哈马收集和观察了6年的动物。标本的颜色模式被主观地分为五个表型类。对41份标本的两个线粒体基因（16 S、CO1）进行了测序。研究了斑胸小蠹的体色、体长、挖洞逃逸行为与种群遗传结构的关系。我们在目标人群中发现了两个遗传上不同的群体，但颜色模式和遗传结构之间没有显着关联。此外，在这些生物体中，颜色模式与个体发育或防御行为之间没有显着关联。本文认为，一般假设的生物和进化作用的颜色后鳃需要仔细评估。
The color pattern of benthic opisthobranch sea slugs (Mollusca: Gastropoda) appears to play an important defensive role, and numerous species seem to have aposematic (warning) colorations. Color pattern is an important trait for opisthobranch identification—this conclusion is based on the assumption that most species have limited color variation. For those species in which color variation is recognized, the reasons for the variation remain unknown. In this paper we studyPhilinopsis pusa, a benthic putative species of opisthobranch sea slug with a broad range of color pattern. Lighter individuals appear to be camouflaged on the white sand environment in which the animals are typically found, whereas darker individuals appear conspicuously different from their background. Because of its broad color variation,P. pusahas been subdivided into different species. Animals were collected and observed in the Bahamas during a 6-year span. The color pattern of the specimens was subjectively classified into five phenotypic classes. Two mitochondrial genes (16S, CO1) were sequenced from 41 specimens. The association between color pattern, body length, burrowing escaping behavior, and the genetic structure of the population was investigated. We found two genetically distinct groups in the target population but no significant association between color pattern and genetic structure. Additionally, there was no significant association between color pattern and ontogeny or defensive behavior in these organisms. The present paper suggests that general assumptions on the biological and evolutionary role of color in opisthobranchs need to be carefully evaluated.