Trophic ecology of three sympatric batoid species (Dasyatis pastinaca, Raja clavata, and Raja maderensis) from the Azores, NE Atlantic

Fontaine, Paco; Barreiros, João P.; JAQUEMET, Sébastien

Publication

Trophic ecology of three sympatric batoid species (Dasyatis pastinaca, Raja clavata, and Raja maderensis) from the Azores, NE Atlantic

2023Journal article

dc.contributor.author	Fontaine, Paco
dc.contributor.author	Barreiros, João P.
dc.contributor.author	JAQUEMET, Sébastien
dc.date.accessioned	2024-01-11T15:23:15Z
dc.date.available	2024-01-11T15:23:15Z
dc.date.issued	2023
dc.description.abstract	ABSTRACT: Describing the trophic structure and interactions of demersal elasmobranch assemblages is fundamental to understanding food web dynamics and developing ecosystem-based management approaches. Stomach content analysis (SCA) and stable isotope ratios (SIA) of carbon (δ13C) and nitrogen (δ15N) from muscle were used to examine the dietary habits and intra- and interspecific trophic ecology of three sympatric batoid species (Dasyatis pastinaca, Raja clavata, and Raja maderensis) from the Azores, Northeast Atlantic. Data were nalyzed with respect to sex and maturity stages. SCA showed that D.pastinaca feeds mostly on crustaceans, whereas R. clavata and R. maderensis prey almost exclusively on teleosts, but not on the same species. Dasyatis pastinaca displayed higher δ13C and lower δ15N values compared to R. clavata and R. maderensis. Trophic niche breadth was variable, D. pastinaca and R. clavata had the broadest and the narrowest trophic breadth, respectively. Relative trophic position categorized D. pastinaca as a mesopredator, while R. clavata and R. maderensis occupied higher trophic positions. With size, R. clavata and R. maderensis shifted from small prey such as crustaceans to larger prey such as teleosts, and they also exhibited significant increases in δ15N with size. Dietary and isotopic overlap was overall low among species, but it was higher between R. clavata and R. maderensis, suggesting more similarity in diet and habitat use between them than with D. pastinaca. This study depicts trophic interactions and functional roles of three co-existing batoid species in the Azorean food webs. In addition to presenting new information on the trophic ecology of D. pastinaca and R. clavata, the present study provides, to our knowledge, the first description of the diet composition and trophic level of the Macaronesian endemic batoid R. maderensis.	pt_PT
dc.description.version	info:eu-repo/semantics/publishedVersion	pt_PT
dc.identifier.citation	Fontaine, P., Barreiros, J. P. & Jaquemet, S. (2023). Trophic ecology of three sympatric batoid species (Dasyatis pastinaca, Raja clavata, and Raja maderensis) from the Azores, NE Atlantic. “Environmental Biology of Fishes”, 106(6), 1477-1492. DOI:10.1007/s10641-023-01412-2 (IF2021 1,798; Q4 Ecology)	pt_PT
dc.identifier.doi	10.1007/s10641-023-01412-2	pt_PT
dc.identifier.issn	1573-5133
dc.identifier.uri	http://hdl.handle.net/10400.3/6826
dc.language.iso	eng	pt_PT
dc.peerreviewed	yes	pt_PT
dc.publisher	Springer	pt_PT
dc.rights.uri	http://creativecommons.org/licenses/by/4.0/	pt_PT
dc.subject	Elasmobranch	pt_PT
dc.subject	Feeding Ecology	pt_PT
dc.subject	Stomach Contents	pt_PT
dc.subject	Macaronesia	pt_PT
dc.title	Trophic ecology of three sympatric batoid species (Dasyatis pastinaca, Raja clavata, and Raja maderensis) from the Azores, NE Atlantic	pt_PT
dc.type	journal article
dspace.entity.type	Publication
oaire.citation.conferencePlace	Netherlands	pt_PT
oaire.citation.endPage	1492	pt_PT
oaire.citation.issue	6	pt_PT
oaire.citation.startPage	1477	pt_PT
oaire.citation.title	Environmental Biology of Fishes	pt_PT
oaire.citation.volume	106	pt_PT
person.familyName	Fontaine
person.familyName	Barreiros
person.familyName	JAQUEMET
person.givenName	Paco
person.givenName	João Pedro
person.givenName	Sébastien
person.identifier	152644
person.identifier.ciencia-id	C415-9731-4440
person.identifier.orcid	0000-0003-0914-5997
person.identifier.orcid	0000-0003-4531-6685
person.identifier.orcid	0000-0003-4199-4657
person.identifier.rid	D-3078-2014
person.identifier.scopus-author-id	6602184125
rcaap.rights	openAccess	pt_PT
rcaap.type	article	pt_PT
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