Article (Scientific journals)
Evolution and diversity of ram-suction feeding in damselfishes (Pomacentridae)
Olivier, Damien; Gajdzik, Laura; Parmentier, Eric et al.
2017In Organisms Diversity and Evolution, 17, p. 497-508
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Keywords :
cerato-mandibular ligament; evolutionary morphology; specialization; reef fishes; zooplanktivory; functional morphology; kinematics; feeding; diet
Abstract :
[en] The cerato-mandibular (c-md) ligament is a synapomorphy within Pomacentridae that creates a tight link between the lower jaws and the hyoid bars. However, this morphological trait has been secondarily lost in multiple lineages during evolution. A previous study revealed that the loss of this trait acted as a release of evolutionary constraints, leading to a cascade of morphological changes such elongated buccal jaws and a slender body. Ecomorphological interpretations suggested the loss of the c-md ligament has ultimately led to a new adaptive peak in zooplanktivory through an optimization of the ram feeding mode associated with a specialization in pelagic feeding. Here, we tested these hypotheses by comparing functional and diet diversity between damselfish species with and without the c-md ligament. Although species lacking the c-md ligament presented a conserved kinematic pattern resulting from high ram and low suction performances, our results did not support an optimization of the ram feeding mode. Indeed, some species with the c-md ligament showed the same or exceeded the ram performance of species without the c-md ligament. The species with the c-md ligament had a more diverse kinematic pattern exploring the entire ram-suction functional range in damselfishes. Finally, our results did not show any diet variations associated with the loss of the c-md ligament. Our study furthers the understanding of how a morphological trait has shaped, by its presence or absence, the ecomorpho-functional diversification of Pomacentridae.
Research center :
AFFISH-RC - Applied and Fundamental FISH Research Center - ULiège
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
Disciplines :
Zoology
Author, co-author :
Olivier, Damien ;  Université de Liège > Département de Biologie, Ecologie et Evolution > Morphologie fonctionnelle et évolutive
Gajdzik, Laura ;  Université de Liège > Département de Biologie, Ecologie et Evolution > Morphologie fonctionnelle et évolutive
Parmentier, Eric  ;  Université de Liège > Département de Biologie, Ecologie et Evolution > Morphologie fonctionnelle et évolutive
Frederich, Bruno  ;  Université de Liège > Département de Biologie, Ecologie et Evolution > Océanographie biologique
Language :
English
Title :
Evolution and diversity of ram-suction feeding in damselfishes (Pomacentridae)
Publication date :
June 2017
Journal title :
Organisms Diversity and Evolution
ISSN :
1439-6092
Publisher :
Elsevier GmbH, Urban & Fischer Verlag
Volume :
17
Pages :
497-508
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Association of European Marine Biological Laboratories (ASSEMBLE)
Available on ORBi :
since 23 January 2017

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