Article (Scientific journals)
Inter-individual differences in ontogenetic trophic shifts among three marine predators
Matich, P.; Kiszka, J. J.; Heithaus, M. R. et al.
2019In Oecologia
Peer Reviewed verified by ORBi
 

Files


Full Text
Matich2019_Article_Inter-individualDifferencesInO.pdf
Publisher postprint (1.66 MB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
Dietary shifts; Elasmobranchs; Foraging development; Juveniles; Nursery
Abstract :
[en] Ontogenetic niche shifts are widespread. However, individual differences in size at birth, morphology, sex, and personalities can cause variability in behavior. As such, inherent inter-individual differences within populations may lead to context-dependent changes in behavior with animal body size, which is of concern for understanding population dynamics and optimizing ecological monitoring. Using stable carbon and nitrogen isotope values from concurrently sampled tissues, we quantified the direction and magnitude of intraspecific variation in trophic shifts among three shark species, and how these changed with body size: spurdogs (Squalus spp.) in deep-sea habitats off La Réunion, bull sharks (Carcharhinus leucas) in estuarine habitats of the Florida Everglades, and blacktip reef sharks (Carcharhinus melanopterus) in coral reef ecosystems of Moorea, French Polynesia. Intraspecific variation in trophic shifts was limited among spurdogs, and decreased with body size, while bull sharks exhibited greater individual differences in trophic shifts, but also decreased in variability through ontogeny. In contrast, blacktip reef sharks exhibited increased intraspecific variation in trophic interactions with body size. Variability in trophic interactions and ontogenetic shifts are known to be associated with changes in energetic requirements, but can vary with ecological context. Our results suggest that environmental stability may affect variability within populations, and ecosystems with greater spatial and/or temporal variability in environmental conditions, and those with more diverse food webs may facilitate greater individual differences in trophic interactions, and thus ontogenetic trophic shifts. In light of concerns over environmental disturbance, elucidating the contexts that promote or dampen phenotypic variability is invaluable for predicting population- and community-level responses to environmental changes. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
Disciplines :
Environmental sciences & ecology
Zoology
Author, co-author :
Matich, P.;  Marine Sciences Program, Florida International University, 3000 NE 151st, North Miami, FL 33181, United States, Texas Research Institute for Environmental Studies, Sam Houston State University, 2424 Sam Houston Avenue, Huntsville, TX 77341, United States
Kiszka, J. J.;  Marine Sciences Program, Florida International University, 3000 NE 151st, North Miami, FL 33181, United States
Heithaus, M. R.;  Marine Sciences Program, Florida International University, 3000 NE 151st, North Miami, FL 33181, United States
Le Bourg, Baptiste ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanographie biologique
Mourier, J.;  PSL Research University: EPHE-UPVD-CNRS, USR 3278 CRIOBE, Perpignan, 66860, France, Laboratoire d’excellence ‘CORAIL’, EPHE, PSL Research University, UPVD, CNRS, USR 3278 CRIOBE, Papetoai, Moorea, French Polynesia, UMR MARBEC (IRD, Ifremer, Univ. Montpellier, CNRS), Sète, 34203, France
Language :
English
Title :
Inter-individual differences in ontogenetic trophic shifts among three marine predators
Publication date :
2019
Journal title :
Oecologia
ISSN :
0029-8549
eISSN :
1432-1939
Publisher :
Springer Verlag
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 20 March 2019

Statistics


Number of views
68 (5 by ULiège)
Number of downloads
1 (1 by ULiège)

Scopus citations®
 
28
Scopus citations®
without self-citations
21
OpenCitations
 
20

Bibliography


Similar publications



Contact ORBi