Article (Scientific journals)
Unprecedented biting performance in herbivorous fish: How the complex biting system of Pomacentridae circumvents performance trade-offs
Olivier, Damien; Van Wassenbergh, Sam; Parmentier, Eric et al.
2021In American Naturalist, 197 (5), p. 156-E172
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Keywords :
damselfishes; reef fishes; morphology; functional morphology; kinematic; modeling; herbivory; comparative methods; evolution; farming
Abstract :
[en] It is well accepted that the complexity of functional systems may mitigate performance trade-offs. However, data supporting this theory are hard to find because they need to be based on a functional system with different complexity levels in closely related species. The Pomacentridae (damselfishes) provide an excellent opportunity to test this hypothesis because most of the species have two mouth-closing systems: the first using the adductor mandibulae, as in all teleost fishes, and the second relying on the ceratomandibular (cmd) ligament, a synapomorphic trait of the family. Interestingly, some pomacentrids have secondarily lost the cmd ligament during evolution and therefore have a less complex mouth-closing system. Using dissection, kinematic analysis, and mathematical modeling, we demonstrated that the possession of two mouth-closing systems enabled grazing damselfishes to have a forceful and extremely fast bite. This combination challenges a major functional trade-off in fish jaw dynamics, as systems better suited for force transmission are usually less suited for speed transmission, and vice versa. The combination of grazing behavior, small and robust lower jaws (conferring high biting force), and an ultrafast bite is unusual within actinopterygians. These attributes and their associated performance seem to be required conditions to colonize the ecological niche of farming, that is, the maintenance of small filamentous algae crops serving as both food and storage.
Research center :
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
AFFISH-RC - Applied and Fundamental FISH Research Center - ULiège
Disciplines :
Environmental sciences & ecology
Zoology
Aquatic sciences & oceanology
Author, co-author :
Olivier, Damien
Van Wassenbergh, Sam
Parmentier, Eric  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Morphologie fonctionnelle et évolutive
Frederich, Bruno  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Morphologie fonctionnelle et évolutive
Language :
English
Title :
Unprecedented biting performance in herbivorous fish: How the complex biting system of Pomacentridae circumvents performance trade-offs
Publication date :
May 2021
Journal title :
American Naturalist
ISSN :
0003-0147
eISSN :
1537-5323
Publisher :
University of Chicago Press, United States - Illinois
Volume :
197
Issue :
5
Pages :
E156-E172
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
ANR - Agence Nationale de la Recherche [FR]
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since 31 May 2021

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