The pattern of brain-size change in the early evolution of cetaceans.

The pattern of brain-size change in the early evolution of cetaceans.
复制标题

DOI:
10.1371/journal.pone.0257803
复制
发表时间:
2021
期刊:
影响因子:
3.7
通讯作者:
Thewissen JGM
Thewissen JGM
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Waugh DA;Thewissen JGM

文献摘要

参考文献

相似文献

大多数作者已经确定了两个快速增长的相对脑的大小(脑化商,EQ)在鲸类的进化:第一个在现代亚目(齿鲸和mysticoptera)的起源始新世-渐新世过渡,第二个在海豚的起源在中新世中期的齿鲸。我们探讨如何使用的方法来估计大脑和身体质量改变这种感知的时间和速度的鲸类动物情商的演变。我们提供了新的数据,现代哺乳动物(mysticopathy,odontocetes,和陆地偶蹄类),并表明,脑质量和endocranial体积规模异速生长,endocranial体积是不是一个直接代理脑质量。我们证明,在用于估计整个始新世-渐新世边界的身体大小的方法的不一致性,造成了虚假的模式,在早期的相对大脑大小的研究。相反,我们采用一种单一的方法,使用枕骨髁宽度作为骨骼代理的身体质量使用一个新的数据集现存的鲸类动物,以澄清这种模式。我们建议,鲸目动物的相对大脑大小是最准确地描绘使用EQs的缩放系数的基础上观察到的密切相关的陆地偶蹄类。最后,我们包括额外的数据始新世鲸鱼,始新世古生物样本量提高到7。我们对鲸类化石EQ的分析与以往的研究不同,以往的研究表明EQ的突然增加与始新世-渐新世边界的齿鲸类的起源相吻合。相反,我们的数据显示,在始新世-渐新世过渡之前的500万年,大脑大小在basilosaurids的起源处增加,我们没有观察到牙鲸类起源处相对大脑大小的显着增加。
Most authors have identified two rapid increases in relative brain size (encephalization quotient, EQ) in cetacean evolution: first at the origin of the modern suborders (odontocetes and mysticetes) around the Eocene-Oligocene transition, and a second at the origin of the delphinoid odontocetes during the middle Miocene. We explore how methods used to estimate brain and body mass alter this perceived timing and rate of cetacean EQ evolution. We provide new data on modern mammals (mysticetes, odontocetes, and terrestrial artiodactyls) and show that brain mass and endocranial volume scale allometrically, and that endocranial volume is not a direct proxy for brain mass. We demonstrate that inconsistencies in the methods used to estimate body size across the Eocene-Oligocene boundary have caused a spurious pattern in earlier relative brain size studies. Instead, we employ a single method, using occipital condyle width as a skeletal proxy for body mass using a new dataset of extant cetaceans, to clarify this pattern. We suggest that cetacean relative brain size is most accurately portrayed using EQs based on the scaling coefficients as observed in the closely related terrestrial artiodactyls. Finally, we include additional data for an Eocene whale, raising the sample size of Eocene archaeocetes to seven. Our analysis of fossil cetacean EQ is different from previous works which had shown that a sudden increase in EQ coincided with the origin of odontocetes at the Eocene-Oligocene boundary. Instead, our data show that brain size increased at the origin of basilosaurids, 5 million years before the Eocene-Oligocene transition, and we do not observe a significant increase in relative brain size at the origin of odontocetes.
DOI: 10.1002/ar.22726
发表时间: 2013-08-01
影响因子: 2
作者:
Hanson, Alicia;Grisham, William;Ridgway, Sam
通讯作者: Ridgway, Sam
DOI: 10.1159/000115305
发表时间: 1990-08-01
影响因子: 1.7
作者:
ARMSTRONG, E
通讯作者: ARMSTRONG, E
DOI: 10.1098/rstb.1953.0003
发表时间: 1953-01-01
期刊: PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES B-BIOLOGICAL SCIENCES
影响因子: --
作者:
DANIEL, PM;DAWES, JDK;PRICHARD, MML
通讯作者: PRICHARD, MML
DOI: 10.1126/science.1063902
发表时间: 2001-09-21
期刊: SCIENCE
影响因子: 56.9
作者:
Gingerich, PD;ul Haq, M;Malkani, MS
通讯作者: Malkani, MS
DOI: 10.1007/s10914-015-9304-y
发表时间: 2016-03-01
影响因子: 1.9
作者:
Gingerich, Philip D.
通讯作者: Gingerich, Philip D.