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Extensive jaw mobility in suckermouth armored catfishes (Loricariidae): a morphological and kinematic analysis of substrate scraping mode of feeding

Dominique Adriaens UGent, Tom Geerinckx UGent, Jelle Vlassenbroeck UGent, Luc Van Hoorebeke UGent and Anthony Herrel (2009) PHYSIOLOGICAL AND BIOCHEMICAL ZOOLOGY. 82(1). p.51-62
abstract
Loricariidae, or suckermouth armored catfishes, possess upper and lower jaws that are ventrally oriented and that bear teeth that touch the substrate from which algae and other food items are scraped. The ventral orientation and the highly specialized morphology of the jaws, characterized by protrusible upper jaws and left-right decoupled lower jaws, are observed in Pterygoplichthys disjunctivus, the species investigated here. Kinematic data of the scraping feeding movements, obtained by external high-speed and x-ray recordings, are used to quantify jaw movement, especially to test for upper jaw mobility and versatility during substrate scraping. Our results show that the mobility of the jaws is indeed high compared with what is standard for catfishes. The upper jaw's ability to perform a substantial degree of rostrocaudal movement is quite unique for catfishes. The ventromedially oriented lower jaws, with the teeth and the coronoid process at opposite sides, display an extensive mobility: they rotate around the suspensorial articulation and around their longitudinal axis, resulting in an extended scraping movement and thereby covering a large surface area. The lower jaws also show a left-right asymmetry in their movements during scraping. Thus, our results suggest that the extreme morphological specializations of the jaws in loricariid catfishes are linked to an increased mobility and functional versatility, allowing these animals to efficiently scrape algae from substrates with irregular surfaces.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (proceedingsPaper)
publication status
published
subject
keyword
CF. TRIRADIATUS LORICARIIDAE, PHYLOGENETIC-RELATIONSHIPS, CICHLID FISHES, SILURIFORMES, ONTOGENY, EVOLUTION, RAY, COMMUNITIES, MUSCULATURE, MECHANISMS
journal title
PHYSIOLOGICAL AND BIOCHEMICAL ZOOLOGY
Physiol. Biochem. Zool.
volume
82
issue
1
pages
51 - 62
conference name
Symposium on Functional Consequences of Extreme Adaptations of the Trophic Apparatus in Craniates, held at the 8th International congress on Vertebrate Morphology (ICVM-8)
conference location
Paris, France
conference start
2007-07-17
conference end
2007-07-17
Web of Science type
Proceedings Paper
Web of Science id
000262090400006
JCR category
ZOOLOGY
JCR impact factor
2.19 (2009)
JCR rank
15/126 (2009)
JCR quartile
1 (2009)
ISSN
1522-2152
DOI
10.1086/594378
language
English
UGent publication?
yes
classification
A1
id
672277
handle
http://hdl.handle.net/1854/LU-672277
date created
2009-05-29 15:08:00
date last changed
2011-06-24 08:45:29
@article{672277,
  abstract     = {Loricariidae, or suckermouth armored catfishes, possess upper and lower jaws that are ventrally oriented and that bear teeth that touch the substrate from which algae and other food items are scraped. The ventral orientation and the highly specialized morphology of the jaws, characterized by protrusible upper jaws and left-right decoupled lower jaws, are observed in Pterygoplichthys disjunctivus, the species investigated here. Kinematic data of the scraping feeding movements, obtained by external high-speed and x-ray recordings, are used to quantify jaw movement, especially to test for upper jaw mobility and versatility during substrate scraping. Our results show that the mobility of the jaws is indeed high compared with what is standard for catfishes. The upper jaw's ability to perform a substantial degree of rostrocaudal movement is quite unique for catfishes. The ventromedially oriented lower jaws, with the teeth and the coronoid process at opposite sides, display an extensive mobility: they rotate around the suspensorial articulation and around their longitudinal axis, resulting in an extended scraping movement and thereby covering a large surface area. The lower jaws also show a left-right asymmetry in their movements during scraping. Thus, our results suggest that the extreme morphological specializations of the jaws in loricariid catfishes are linked to an increased mobility and functional versatility, allowing these animals to efficiently scrape algae from substrates with irregular surfaces.},
  author       = {Adriaens, Dominique and Geerinckx, Tom and Vlassenbroeck, Jelle and Van Hoorebeke, Luc and Herrel, Anthony},
  issn         = {1522-2152},
  journal      = {PHYSIOLOGICAL AND BIOCHEMICAL ZOOLOGY},
  keyword      = {CF. TRIRADIATUS LORICARIIDAE,PHYLOGENETIC-RELATIONSHIPS,CICHLID FISHES,SILURIFORMES,ONTOGENY,EVOLUTION,RAY,COMMUNITIES,MUSCULATURE,MECHANISMS},
  language     = {eng},
  location     = {Paris, France},
  number       = {1},
  pages        = {51--62},
  title        = {Extensive jaw mobility in suckermouth armored catfishes (Loricariidae): a morphological and kinematic analysis of substrate scraping mode of feeding},
  url          = {http://dx.doi.org/10.1086/594378},
  volume       = {82},
  year         = {2009},
}

Chicago
Adriaens, Dominique, Tom Geerinckx, Jelle Vlassenbroeck, Luc Van Hoorebeke, and Anthony Herrel. 2009. “Extensive Jaw Mobility in Suckermouth Armored Catfishes (Loricariidae): a Morphological and Kinematic Analysis of Substrate Scraping Mode of Feeding.” Physiological and Biochemical Zoology 82 (1): 51–62.
APA
Adriaens, Dominique, Geerinckx, T., Vlassenbroeck, J., Van Hoorebeke, L., & Herrel, A. (2009). Extensive jaw mobility in suckermouth armored catfishes (Loricariidae): a morphological and kinematic analysis of substrate scraping mode of feeding. PHYSIOLOGICAL AND BIOCHEMICAL ZOOLOGY, 82(1), 51–62. Presented at the Symposium on Functional Consequences of Extreme Adaptations of the Trophic Apparatus in Craniates, held at the 8th International congress on Vertebrate Morphology (ICVM-8).
Vancouver
1.
Adriaens D, Geerinckx T, Vlassenbroeck J, Van Hoorebeke L, Herrel A. Extensive jaw mobility in suckermouth armored catfishes (Loricariidae): a morphological and kinematic analysis of substrate scraping mode of feeding. PHYSIOLOGICAL AND BIOCHEMICAL ZOOLOGY. 2009;82(1):51–62.
MLA
Adriaens, Dominique, Tom Geerinckx, Jelle Vlassenbroeck, et al. “Extensive Jaw Mobility in Suckermouth Armored Catfishes (Loricariidae): a Morphological and Kinematic Analysis of Substrate Scraping Mode of Feeding.” PHYSIOLOGICAL AND BIOCHEMICAL ZOOLOGY 82.1 (2009): 51–62. Print.