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Ultrastructural morphological features of the hair in a sexual signal: the dark ventral patch of male red deer
Journal of Zoology ( IF 1.9 ) Pub Date : 2020-09-28 , DOI: 10.1111/jzo.12833 E. Peña 1 , J. Martín 2 , J. Carranza 1
Journal of Zoology ( IF 1.9 ) Pub Date : 2020-09-28 , DOI: 10.1111/jzo.12833 E. Peña 1 , J. Martín 2 , J. Carranza 1
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Chemical signals play a decisive role in communication in many mammal species. In red deer (Cervus elaphus), the dark ventral patch has recently been described as a male chemical signal involved in intrasexual competition. Morphological specializations of the hair of this area might contribute to retaining the volatile compounds found here. In this study, we examined differences in the ultrastructure between hair associated with the dark ventral patch and hairs from the dorsolateral region of the body as a control. We obtained a gallery of images from a scanning electron microscope to study the possible variation in the detailed anatomy as well as the surface and pattern of cuticular scales of hairs of the two body regions examined. In addition, we used a 2D‐3D microscope to measure hair diameter (thickness) and the shape and size of the cuticular scales. We found that the hairs of the dark ventral patch were narrower than those from the dorsolateral region. We also found a different cuticular scale pattern of the dark ventral patch hairs, suggesting a possible specialization for the retention of compounds associated with this chemical signal. Moreover, some intersexual differences in hair morphology also support this idea. This study shows, for the first time, the differentiation of hairs related to the dark ventral patch, which contributes to our better understanding of this chemical communication in red deer.
中文翻译：
性信号中头发的超微结构特征：雄性马鹿的深色腹面
化学信号在许多哺乳动物物种的交流中起着决定性的作用。在马鹿（鹿elaphus），最近已将深色腹面贴片描述为涉及内部竞争的男性化学信号。该区域头发的形态学特征可能有助于保留此处发现的挥发性化合物。在这项研究中，我们检查了与深色腹侧斑块相关的头发与来自身体背外侧区域的头发之间的超微结构差异，以此作为对照。我们从扫描电子显微镜获得了图像库，以研究详细解剖结构以及所检查的两个身体部位的头发的表皮鳞片的表面和图案的可能变化。此外，我们使用2D-3D显微镜测量头发的直径（厚度）以及表皮鳞片的形状和大小。我们发现，深色腹面补丁的头发比背外侧区域的头发要窄。我们还发现了深色腹侧补丁毛的不同表皮鳞片样式，这表明可能保留了与该化学信号相关的化合物。此外，在性形态上的两性之间的差异也支持这一想法。这项研究首次显示了与深色腹面斑有关的毛发分化，这有助于我们更好地了解马鹿中的这种化学通讯。
更新日期：2020-09-28
中文翻译：
性信号中头发的超微结构特征：雄性马鹿的深色腹面
化学信号在许多哺乳动物物种的交流中起着决定性的作用。在马鹿（鹿elaphus），最近已将深色腹面贴片描述为涉及内部竞争的男性化学信号。该区域头发的形态学特征可能有助于保留此处发现的挥发性化合物。在这项研究中，我们检查了与深色腹侧斑块相关的头发与来自身体背外侧区域的头发之间的超微结构差异，以此作为对照。我们从扫描电子显微镜获得了图像库，以研究详细解剖结构以及所检查的两个身体部位的头发的表皮鳞片的表面和图案的可能变化。此外，我们使用2D-3D显微镜测量头发的直径（厚度）以及表皮鳞片的形状和大小。我们发现，深色腹面补丁的头发比背外侧区域的头发要窄。我们还发现了深色腹侧补丁毛的不同表皮鳞片样式，这表明可能保留了与该化学信号相关的化合物。此外，在性形态上的两性之间的差异也支持这一想法。这项研究首次显示了与深色腹面斑有关的毛发分化，这有助于我们更好地了解马鹿中的这种化学通讯。
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