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Comparative analysis of the morphology of the feeding apparatus in Myliobatiform rays (Chondrichthyes: Batoidea)

Grant number: 12/09877-0
Support Opportunities:Regular Research Grants
Start date: August 01, 2012
End date: July 31, 2015
Field of knowledge:Biological Sciences - Zoology - Morphology of Recent Groups
Principal Investigator:Marcelo Rodrigues de Carvalho
Grantee:Marcelo Rodrigues de Carvalho
Host Institution: Instituto de Biociências (IB). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated researchers:Akemi Shibuya

Abstract

The euhyostilic jaw suspension of batoids is effected only by the hyomandibular cartilagessupporting the mandibular elements, without any articulation or connection between theneurocranium and palatoquadrate. However, morphological differences in the feeding apparatus andorobranchial musculature can lead to different prey capture and manipulation modes in batoids. Inaddition, some species are capable of feeding on hard prey, such as mollusks and crustaceans, whichmay be related to trabeculation of the palatoquadrate and Meckelian cartilages that absorb the stressgenerated by crushing prey of this type. Thus, in order to understand the evolution and function of thejaw suspension in myliobatiforms, the arrangement and morphology of the jaw suspension andassociated orobranchial musculature will be extensively analyzed in species of this order. Themorphology of the feeding apparatus will be related to existing information on the diet and feedinghabits of the analyzed species. Specimens will be obtained from museums and collections fordissection. The orobranchial musculature will be removed and its performance during prey captureand manipulation will be analyzed using the value of relative dry mass of each muscle set involved inthe feeding process. The morphology of jaw suspension will be described and the palatoquadrate andMeckelian cartilages will be analyzed histologically to reveal trabeculation. To comprehend theevolutionary significance of the different feeding patterns, the results will be incorporated intoavailable phylogenetic hypotheses for myliobatiform rays. The relationship between a specificfeeding apparatus and its functionality, in relation to the consumption of different prey types, mayprovide information concerning the peculiar feeding mechanics of myliobatiform species, and mayalso contribute to clarify the evolution of this order. (AU)

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Scientific publications (21)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DA SILVA, JOAO PAULO C. B.; DE CARVALHO, MARCELO R.. Morphology and phylogenetic significance of the pectoral articular region in elasmobranchs (Chondrichthyes). Zoological Journal of the Linnean Society, v. 175, n. 3, p. 525-568, . (12/02349-8, 12/05391-5, 12/09877-0, 12/22692-9)
DE CARVALHO, MARCELO R.; WHITE, WILLIAM T.. Narcine baliensis, a new species of electric ray from southeast Asia (Chondrichthyes: Torpediniformes). Zootaxa, v. 4127, n. 1, p. 149-160, . (12/05391-5, 12/02349-8, 12/09877-0)
FONTENELLE, JOAO PEDRO; DA SILVA, JOAO PAULO C. B.; DE CARVALHO, MARCELO R.. Potamotrygon limai, sp nov., a new species of freshwater stingray from the upper Madeira River system, Amazon basin (Chondrichthyes: Potamotrygonidae). Zootaxa, v. 3765, n. 3, p. 249-268, . (12/02349-8, 02/06459-0, 12/05391-5, 12/09877-0, 11/03952-7)
EBERT, DAVID A.; HAAS, DIANE L.; DE CARVALHO, MARCELO R.. Tetronarce cowleyi, sp nov., a new species of electric ray from southern Africa (Chondrichthyes: Torpediniformes: Torpedinidae). Zootaxa, v. 3936, n. 2, p. 237-250, . (12/05391-5, 12/09877-0)
SHIBUYA, AKEMI; DE CARVALHO, MARCELO R.; ZUANON, JANSEN; TANAKA, SHO. The use of pelvic fins for benthic locomotion during foraging behavior in Potamotrygon motoro (Chondrichthyes: Potamotrygonidae). ZOOLOGIA, v. 32, n. 3, p. 8-pg., . (12/09877-0, 12/05391-5)
SHIBUYA, AKEMI; DE CARVALHO, MARCELO R.; ZUANON, JANSEN; TANAKA, SHO. The use of pelvic fins for benthic locomotion during foraging behavior in Potamotrygon motoro (Chondrichthyes: Potamotrygonidae). Zoologia, v. 32, n. 3, p. 179-186, . (12/05391-5, 12/09877-0)
DA SILVA, JOAO PAULO C. B.; VAZ, DIEGO F. B.; DE CARVALHO, MARCELO R.. Phylogenetic inferences on the systematics of squaliform sharks based on elasmobranch scapular morphology (Chondrichthyes: Elasmobranchii). ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY, v. 182, n. 3, p. 614-630, . (13/13137-4, 12/02349-8, 12/07712-3, 12/05391-5, 12/09877-0, 12/22692-9)
DE CARVALHO, MARCELO R.; ROSA, RICARDO S.; DE ARAUJO, MARIA LUCIA G.. A new species of Neotropical freshwater stingray (Chondrichthyes: Potamotrygonidae) from the Rio Negro, Amazonas, Brazil: the smallest species of Potamotrygon. Zootaxa, v. 4107, n. 4, p. 566-585, . (12/05391-5, 12/02349-8, 12/09877-0)
WEIGMANN, SIMON; VAZ, DIEGO F. B.; WHITE, WILLIAM T.; DE CARVALHO, MARCELO R.; THIEL, RALF. Distribution and comments on the morphology of Centroscymnus owstonii Garman, 1906 (Squaliformes: Somniosidae), with focus on its occurrence in the Indian Ocean. MARINE BIODIVERSITY, v. 46, n. 3, p. 641-653, . (13/13137-4, 13/05292-0, 12/07712-3, 12/05391-5, 12/05152-0, 12/09877-0)
DA SILVA, JOAO PAULO C. B.; VAZ, DIEGO F. B.; DE CARVALHO, MARCELO R.. Systematic Implications of the Anterior Pectoral Basals in Squaliform Sharks (Chondrichthyes: Elasmobranchii). Copeia, v. 103, n. 4, p. 874-885, . (13/13137-4, 12/02349-8, 12/07712-3, 12/05391-5, 12/09877-0, 12/22692-9)
JONES, CHRISTIAN M.; HOFFMAYER, ERIC R.; HENDON, JILL M.; QUATTRO, JOSEPH M.; LEWANDOWSKI, JUSTIN; ROBERTS, MARK A.; POULAKIS, GREGG R.; AJEMIAN, MATTHEW J.; DRIGGERS, III, WILLIAM B.; DE CARVALHO, MARCELO R.; et al. Morphological conservation of rays in the genus Rhinoptera (Elasmobranchii, Rhinopteridae) conceals the occurrence of a large batoid, Rhinoptera brasiliensis Muller, in the northern Gulf of Mexico. Zootaxa, v. 4286, n. 4, p. 499-514, . (12/05391-5, 12/02349-8, 12/09877-0)
VIANA, SARAH T. DE F.; DE CARVALHO, MARCELO R.; GOMES, ULISSES L.. Taxonomy and morphology of species of the genus Squalus Linnaeus, 1758 from the Southwestern Atlantic Ocean (Chondrichthyes: Squaliformes: Squalidae). Zootaxa, v. 4133, n. 1, p. 1-89, . (12/05391-5, 12/02349-8, 12/09877-0)
WHITE, WILLIAM T.; VAZ, DIEGO F. B.; HO, HSUAN-CHING; EBERT, DAVID A.; DE CARVALHO, MARCELO R.; CORRIGAN, SHANNON; ROCHEL, ELISABETH; DE CARVALHO, MURILO; TANAKA, SHO; NAYLOR, GAVIN J. P.. Redescription of Scymnodon ichiharai Yano and Tanaka 1984 (Squaliformes: Somniosidae) from the western North Pacific, with comments on the definition of somniosid genera. ICHTHYOLOGICAL RESEARCH, v. 62, n. 2, p. 213-229, . (13/13137-4, 13/05292-0, 12/07712-3, 12/05391-5, 12/05152-0, 12/09877-0)
FONTENELLE, JOAO PEDRO; DE CARVALHO, MARCELO R.. Systematic Implications of Brain Morphology in Potamotrygonidae (Chondrichthyes: Myliobatiformes). Journal of Morphology, v. 277, n. 2, p. 252-263, . (12/05391-5, 12/02349-8, 12/09877-0, 10/01240-7)
DA SILVA, JOAO PAULO C. B.; DE CARVALHO, MARCELO R.. Morphology and phylogenetic significance of the pectoral articular region in elasmobranchs (Chondrichthyes). ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY, v. 175, n. 3, p. 44-pg., . (12/02349-8, 12/05391-5, 12/22692-9, 12/09877-0)