Universität zu Köln

Frainer, Guilherme ORCID: 0000-0002-5527-9219, Plon, Stephanie, Serpa, Nathalia B., Moreno, Ignacio B. and Huggenberger, Stefan (2019). Sound Generating Structures of the Humpback Dolphin Sousa plumbea (Cuvier, 1829) and the Directionality in Dolphin Sounds. Anat. Rec., 302 (6). S. 849 - 861. HOBOKEN: WILEY. ISSN 1932-8494

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Abstract

The macroscopic morphology of structures involved in sound generation in the Indian Ocean humpback dolphin (Sousa plumbea) were described for the first time using computed tomography imaging and standard gross dissection techniques. The Indian Ocean humpback dolphin may represent a useful comparative model to the bottlenose dolphin (Tursiops sp.) to provide insights into the functional anatomy of the sound production in dolphins, since these coastal dolphins exhibit similar body size and share similarities on acoustic behavior. The general arrangement of sound generating structures, that is, air sacs and muscles, was similar in both the bottlenose dolphin and the Indian Ocean humpback dolphin. The main difference between the two species existed in a small left posterior branch of the melon in the Indian Ocean humpback dolphin, which was not found in the bottlenose dolphin and might reflect an adaptation of directionality for high frequency communication sounds as seen in some other delphinids (e.g., Lagenorhynchus sp., Grampus griseus). Thus, this may be the main reason for the asymmetry of the sound production structures in dolphins. Additionally, the longer rostrum in Indian Ocean humpback dolphins might suggest a more directional echolocation beam compared to the Lahille's bottlenose dolphin. Anat Rec, 302:849-860, 2019. (c) 2018 Wiley Periodicals, Inc.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Frainer, Guilherme UNSPECIFIED orcid.org/0000-0002-5527-9219 UNSPECIFIED Plon, Stephanie UNSPECIFIED UNSPECIFIED UNSPECIFIED Serpa, Nathalia B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Moreno, Ignacio B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Huggenberger, Stefan UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-147453
DOI:	10.1002/ar.23981
Journal or Publication Title:	Anat. Rec.
Volume:	302
Number:	6
Page Range:	S. 849 - 861
Date:	2019
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1932-8494
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language TRANSMISSION BEAM PATTERN; TURSIOPS-TRUNCATUS; HARBOR PORPOISE; FUNCTIONAL-MORPHOLOGY; ECHOLOCATION SIGNALS; PSEUDORCA-CRASSIDENS; PHOCOENA-PHOCOENA; RISSOS DOLPHINS; NASAL COMPLEX; SHARK NETS Multiple languages Anatomy & Morphology Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/14745