Universität zu Köln

Frainer, Guilherme ORCID: 0000-0002-5527-9219, Moreno, Ignacio B., Serpa, Nathalia, Galatius, Anders ORCID: 0000-0003-1237-2066, Wiedermann, Dirk and Huggenberger, Stefan (2019). Ontogeny and evolution of the sound-generating structures in the infraorder Delphinida (Odontoceti: Delphinida). Biol. J. Linnean Soc., 128 (3). S. 700 - 725. OXFORD: OXFORD UNIV PRESS. ISSN 1095-8312

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Abstract

The ontogeny of the structures involved in sound generation and modulation in dolphins was investigated through a comparison of the soft nasal structures of foetal, perinatal, neonatal and adult specimens of Pontoporiidae, Phocoenidae and Delphinidae. Foetal samples were sectioned at 10 mu m in the saggital and coronal planes, and stained for histological examination. Computed tomography and magentic resonance imaging scan series were combined with new data to represent the ontogenetic stages of the three groups. The images were analysed in 3D-Slicer to characterize the general head topography. The origins of the melon and the vestibular air sac were detected between Carnegie stages C16 and F22. The three groups analysed showed distinct formation of the nasal plug and nasal plug muscles, mainly with regard to the loss of fat pathways (or their maintenance in Pontoporiidae) and the development of the nasal plug muscles on both sides (during perinatal development of Phocoenidae) or just on the left side (during postnatal development in Delphinidae). Broadband vocalizing delphinidans might have evolved under heterochronic events acting on the formation of sound-generating structures such as the rostrum and vestibular air sacs, and on the transformation of the branches of the melon, probably leading to a reduced directionality of the sonar beam.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Frainer, Guilherme UNSPECIFIED orcid.org/0000-0002-5527-9219 UNSPECIFIED Moreno, Ignacio B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Serpa, Nathalia UNSPECIFIED UNSPECIFIED UNSPECIFIED Galatius, Anders UNSPECIFIED orcid.org/0000-0003-1237-2066 UNSPECIFIED Wiedermann, Dirk UNSPECIFIED UNSPECIFIED UNSPECIFIED Huggenberger, Stefan UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-129531
DOI:	10.1093/biolinnean/blz118
Journal or Publication Title:	Biol. J. Linnean Soc.
Volume:	128
Number:	3
Page Range:	S. 700 - 725
Date:	2019
Publisher:	OXFORD UNIV PRESS
Place of Publication:	OXFORD
ISSN:	1095-8312
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language TURSIOPS-TRUNCATUS; HARBOR PORPOISE; NASAL COMPLEX; FUNCTIONAL-MORPHOLOGY; PHOCOENA-PHOCOENA; BEAM FORMATION; DOLPHINS; WHALE; ORIGIN; CLICKS Multiple languages Evolutionary Biology Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/12953