Differential growth of the adductor muscles, eyeball, and brain in the chick Gallus gallus with comments on the fossil record of stem‐group birds
Differential growth of the adductor muscles, eyeball, and brain in the chick Gallus gallus with comments on the fossil record of stem‐group birds
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鸡内收肌、眼球和大脑的差异生长以及对干群鸟类化石记录的评论
DOI：
10.1002/jmor.21622
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发表时间：
2023
影响因子：
1.5
通讯作者：
Bever, Gabriel S.
中科院分区：
文献类型：
--
作者：
Cerio, Donald G.;Llera Martín, Catherine J.;Hogan, Aneila V. C.;Balanoff, Amy M.;Watanabe, Akinobu;Bever, Gabriel S.
鸟类的头部在现存的爬行动物中是独一无二的，它的大脑和眼睛相对较大，加上相对较小的内收肌。这些推导出的比例适合于一个权衡假设，其中内收肌的大小随着进化时间的推移而减小，作为神经感觉扩张的一种手段（或结果）。在这项研究中，我们通过描述发育中的鸡（Gallus gallus）的颌内收肌解剖结构，并将这些发育中的肌肉的体积扩张与大脑和眼睛的生长轨迹进行比较，通过发育的透镜来检验这一进化假说。在权衡假设下，我们预测颌骨肌肉相对于大脑和眼睛将以负异速生长，并且在大多数非鸟类恐龙中发现的相对较大的内收肌系统的骨骼学特征将在年轻的小鸡中差异表达。结果没有达到这些预期，至少一般来说没有，肌肉生长相对于大脑和眼睛的生长表现出正异速生长。我们提出了三个不相互排斥的解释：（1）这些系统不竞争空间，（2）这些系统在进化的过去竞争空间，颌骨肌肉的生长在发育早期被截断（幼态），（3）这些系统中发育投资的权衡暂时限于围产期。这些解释是根据化石记录来考虑的，最引人注目的是干鸟鱼鸟的头骨，它表现出近形大的内收肌腔和无形大的大脑的有趣组合。
The avian head is unique among living reptiles in its combination of relatively large brain and eyes, coupled with relatively small adductor jaw muscles. These derived proportions lend themselves to a trade‐off hypothesis, wherein adductor size was reduced over evolutionary time as a means (or as a consequence) of neurosensory expansion. In this study, we examine this evolutionary hypothesis through the lens of development by describing the jaw‐adductor anatomy of developing chickens,Gallus gallus, and comparing the volumetric expansion of these developing muscles with growth trajectories of the brain and eye. Under the trade‐off hypothesis, we predicted that the jaw muscles would grow with negative allometry relative to brain and eyes, and that osteological signatures of a relatively large adductor system, as found in most nonavian dinosaurs, would be differentially expressed in younger chicks. Results did not meet these expectations, at least not generally, with muscle growth exhibiting positive allometry relative to that of brain and eye. We propose three, nonmutually exclusive explanations: (1) these systems do not compete for space, (2) these systems competed for space in the evolutionary past, and growth of the jaw muscles was truncated early in development (paedomorphosis), and (3) trade‐offs in developmental investment in these systems are limited temporally to the perinatal period. These explanations are considered in light of the fossil record, and most notably the skull of the stem birdIchthyornis, which exhibits an interesting combination of plesiomorphically large adductor chamber and apomorphically large brain.
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DOI：
10.1093/iob/obz006
发表时间：
2019
期刊：
Integrative organismal biology (Oxford, England)
影响因子：
--
作者：
O'Brien HD;Lynch LM;Vliet KA;Brueggen J;Erickson GM;Gignac PM
通讯作者：
Gignac PM
影响因子：
2.4
作者：
Early, Catherine M.;Ridgely, Ryan C.;Witmer, Lawrence M.
通讯作者：
Witmer, Lawrence M.
影响因子：
1.8
作者：
WALLMAN, J;ADAMS, JI
通讯作者：
ADAMS, JI
DOI：
--
发表时间：
1991
期刊：
影响因子：
--
作者：
K. Vogel
通讯作者：
K. Vogel
奔跑鸟类腿部的异速生长
影响因子：
2
作者：
G. Maloiy;R. Alexander;R. Njau;A. S. Jayes
通讯作者：
A. S. Jayes