globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2014.01.026
论文题名:
High frequency echolocation, ear morphology, and the marine-freshwater transition: A comparative study of extant and extinct toothed whales
作者: Gutstein C.S.; Figueroa-Bravo C.P.; Pyenson N.D.; Yury-Yañez R.E.; Cozzuol M.A.; Canals M.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 400
起始页码: 62
结束页码: 74
语种: 英语
英文关键词: Ecomorphology ; Evolution ; Neogene ; Odontoceti ; Periotic ; River dolphins
英文摘要: This study compares the bony ear morphology of freshwater and marine odontocetes (toothed whales). Odontocetes are unique among marine mammals in two important respects: 1) they use echolocation; 2) at least three lineages have independently evolved obligate freshwater habits from marine ancestries. Freshwater odontocetes include the so-called "river dolphins," a paraphyletic group that each evolved convergent external morphological characters that distinguish them from oceanic dolphins (Delphinoidea). In addition to their convergent external morphology, "river dolphins" all have echolocation that use one peak (narrow-band) frequency around 100. kHz, compared to oceanic delphinoids which use a two peak (bimodal) frequency ranging from 40 to 140. kHz. The differences in echolocation suggest that the sensory systems responsible for detecting these different sound frequencies should also differ, although quantitative assessments of the cetacean hearing system remain understudied and taxonomically undersampled. To test if ear bone morphology reflects underlying environmentally driven differences in echolocation ability, we assembled a dataset of odontocete periotics (n=114) from extant and fossil species. We examined 18 external and three internal linear periotic measurements, the latter of which were examined using cone-beam scanning tomography. Results from multivariate canonical ordination analyses show that periotic height, periotic thickness and pars cochlearis width collectively explain the largest amount of interspecific variation in our dataset. Because these particular ear bone measurements correspond to acoustic hearing ranges, we propose that they are also proxies for environmental preference (i.e., marine, freshwater and intermediate habitats) and may be useful for deciphering environmental preferences of extinct odontocetes. © 2014 Elsevier B.V.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69387
Appears in Collections:过去全球变化的重建

Files in This Item:

There are no files associated with this item.


作者单位: Laboratorio de Ecofisiología, Departmento de Ecología, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Ñuñoa, Santiago, Chile; Red Paleontológica U. Chile, Laboratorio de Ontogenia y Filogenia, Departmento de Biología, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Ñuñoa, Santiago, Chile; Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, P.O. Box 37012, Washington DC 20013-7012, United States; Departments of Mammalogy and Paleontology, Burke Museum of Nature and Culture, Seattle, WA 98195-3010, United States; Laboratorio de Zoología de Vertebrados, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Ñuñoa, Santiago, Chile; Departamento de Zoologia, Instiuto Ciências Biológicas, Universidade Federal de Minas Gerais, Av. AntÔnio Carlos, 6627 Pampulha, 31270-910 Belo Horizonte, MG, Brazil

Recommended Citation:
Gutstein C.S.,Figueroa-Bravo C.P.,Pyenson N.D.,et al. High frequency echolocation, ear morphology, and the marine-freshwater transition: A comparative study of extant and extinct toothed whales[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,400
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Gutstein C.S.]'s Articles
[Figueroa-Bravo C.P.]'s Articles
[Pyenson N.D.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Gutstein C.S.]'s Articles
[Figueroa-Bravo C.P.]'s Articles
[Pyenson N.D.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Gutstein C.S.]‘s Articles
[Figueroa-Bravo C.P.]‘s Articles
[Pyenson N.D.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.