Scaling of olfactory antennae of the terrestrial hermit crabs Coenobita rugosus and Coenobita perlatus during ontogeny.
Scaling of olfactory antennae of the terrestrial hermit crabs Coenobita rugosus and Coenobita perlatus during ontogeny.
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作者：
Waldrop LD;Bantay RM;Nguyen QV
虽然陆生甲壳类动物的许多谱系嗅觉能力较差，但coenobtidae中的螃蟹，包括Coenobita属的陆生寄居蟹，能够利用嗅觉触角（触角）从周围空气中捕捉气味来定位食物和水。陆生寄居蟹起初是海洋中的小幼虫，必须找到一个合适的地方蜕变成幼蟹，开始向陆地过渡。幼鱼的体型要增加一个多数量级才能达到成年鱼的体型。由于气味捕获是一个严重依赖于触角的大小和速度以及流体的物理性质的过程，因此从水到空气的转变以及个体发生过程中尺寸的大幅增加都可能影响气味捕获。在这项研究中，我们研究了两种陆地寄居蟹，Coenobita perlatus H. Milne-Edwards和Coenobita rugosus H. Milne-Edwards，以确定在个体发育过程中，触角的形态计量学和甩动运动学是如何随着体型的变化而变化的，以及这种缩放关系如何通过一个简单的流动质量传输模型影响气味捕获。触角的许多特征，包括化学感觉的触角，与甲壳宽度呈异速缩放，并且比等距缩放预期的增长速度慢，导致幼年动物的触角相对较大。弹射速度按预期等距缩放。我们的质量传输模型显示，与等距缩放的触角相比，触角形态和运动学的异速缩放导致在轻弹过程中触角周围附着流体的边界层更薄，气味捕获率更高。在形态计量学和运动学测量上，两个物种之间没有显著差异。
Although many lineages of terrestrial crustaceans have poor olfactory capabilities, crabs in the family Coenobitidae, including the terrestrial hermit crabs in the genus Coenobita, are able to locate food and water using olfactory antennae (antennules) to capture odors from the surrounding air. Terrestrial hermit crabs begin their lives as small marine larvae and must find a suitable place to undergo metamorphosis into a juvenile form, which initiates their transition to land. Juveniles increase in size by more than an order of magnitude to reach adult size. Since odor capture is a process heavily dependent on the size and speed of the antennules and physical properties of the fluid, both the transition from water to air and the large increase in size during ontogeny could impact odor capture. In this study, we examine two species of terrestrial hermit crabs, Coenobita perlatus H. Milne-Edwards and Coenobita rugosus H. Milne-Edwards, to determine how the antennule morphometrics and kinematics of flicking change in comparison to body size during ontogeny, and how this scaling relationship could impact odor capture by using a simple model of mass transport in flow. Many features of the antennules, including the chemosensory sensilla, scaled allometrically with carapace width and increased slower than expected by isometry, resulting in relatively larger antennules on juvenile animals. Flicking speed scaled as expected with isometry. Our mass-transport model showed that allometric scaling of antennule morphometrics and kinematics leads to thinner boundary layers of attached fluid around the antennule during flicking and higher odorant capture rates as compared to antennules which scaled isometrically. There were no significant differences in morphometric or kinematic measurements between the two species.
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DOI：
10.1098/rspb.2012.0596
发表时间：
2012-09-07
期刊：
Proceedings. Biological sciences
影响因子：
--
作者：
Krång AS;Knaden M;Steck K;Hansson BS
通讯作者：
Hansson BS
DOI：
10.1016/s0022-0981(02)00039-4
发表时间：
2002-06-10
影响因子：
2
作者：
Brodie, RJ
通讯作者：
Brodie, RJ
影响因子：
2.5
作者：
Keller, TA;Powell, I;Weissburg, MJ
通讯作者：
Weissburg, MJ
影响因子：
2.5
作者：
Beltz, BS;Kordas, K;Sandeman, DC
通讯作者：
Sandeman, DC
DOI：
10.1073/pnas.92.1.62
发表时间：
1995-01-03
影响因子：
11.1
作者：
ATEMA, J
通讯作者：
ATEMA, J