| Unusual kinematics and jaw morphology associated with piscivory in the poeciliid, Belonesox belizanus. | |
| | |
MedLine Citation:
|
PMID: 20435454 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Piscivory in fishes is often associated with the evolution of highly elongate jaws that achieve a large mouth opening, or gape. Belonesox belizanus, the pike killifish, has independently evolved this morphology, which is derived from short-jawed poeciliids within the Cyprinodontiformes. Using kinematic analysis of high-speed video footage, we observed a novel aspect of the elongate jaws of Belonesox; the premaxilla rotates dorsally during mouth opening, while the lower jaw rotates ventrally. Anatomical study revealed that this unusual motion is facilitated by the architecture of the premaxillomandibular ligament, prominent within cyprinodontiforms. In Belonesox, it allows force to be transferred from the lower jaw directly to the premaxilla, thereby causing it to rotate dorsally. This dorsal rotation of the premaxilla appears to be assisted by a mediolateral twisting of the maxilla during jaw opening. Twisting maxillae are found in members of the group such as Fundulus, but are lost in Gambusia. Models revealed that elongate jaws partially account for the enlarged gape, but enhanced rotation at the quadrato-mandibular joint was equally important. The large gape is therefore created by: (i) the convergent evolution of elongate jaws; (ii) enhanced jaw rotation, facilitated by loss of a characteristic cyprinodontiform trait, the lip membrane; and (iii) premaxilla rotation in a novel direction, facilitated by the retention and co-option of additional cyprinodontiform traits, the premaxillomandibular ligament and a twisting maxilla. |
| | |
Authors:
|
Lara A Ferry-Graham; L Patricia Hernandez; Alice C Gibb; Cinnamon Pace |
Related Documents
:
|
18472424 - Collective motion and cannibalism in locust migratory bands. 8495504 - Occlusal contacts: vectorial analysis of forces transmitted to temporomandibular joint ... 19055094 - The inman aligner for anterior tooth alignment. 19905854 - Masticatory performance and chewing cycle kinematics-are they related? 2035274 - Grating detection and identification: comparison of postadaptation reaction times. 11752374 - Light control of arabidopsis development entails coordinated regulation of genome expre... |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
|
Title: Zoology (Jena, Germany) Volume: 113 ISSN: 1873-2720 ISO Abbreviation: Zoology (Jena) Publication Date: 2010 May |
Date Detail:
|
Created Date: 2010-06-10 Completed Date: 2010-10-12 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 9435608 Medline TA: Zoology (Jena) Country: Germany |
Other Details:
|
Languages: eng Pagination: 140-7 Citation Subset: IM |
Copyright Information:
|
(c) 2010 Elsevier GmbH. All rights reserved. |
Affiliation:
|
California State University, Moss Landing Marine Laboratories, 8272 Moss Landing Rd., Moss Landing, CA 95039, USA. lfgraham@mlml.calstate.edu |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adaptation, Biological
/
physiology* Animals Biomechanics Cyprinodontiformes / anatomy & histology, physiology* Feeding Behavior / physiology* Jaw / anatomy & histology*, physiology* Models, Biological Predatory Behavior / physiology |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Juvenile colour polymorphism in the red rock crab, Cancer productus: patterns, causes, and possible ...
Next Document: Chemopreventive effects of ?-ionone and geraniol during rat hepatocarcinogenesis promotion: distinct...