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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Resource partitioning by two syntopic sister species of butterflyfish (Chaetodontidae)

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Liedke, Ana M. R. [1] ; Bonaldo, Roberta M. [1, 2] ; Segal, Barbara [1, 3] ; Ferreira, Carlos E. L. [4] ; Nunes, Lucas T. [1] ; Burig, Ana P. [1] ; Buck, Sonia [5] ; Oliveira-Santos, Luiz Gustavo R. [6] ; Floeter, Sergio R. [1]
Total Authors: 9
[1] Univ Fed Santa Catarina, Dept Ecol & Zool, Florianopolis, SC - Brazil
[2] Univ Estadual Campinas, Inst Biol, Grp Hist Nat Vertebrados, Campinas, SP - Brazil
[3] Inst Coral Vivo, Arraial Dajuda, Porto Seguro - Brazil
[4] Univ Fed Fluminense, Dept Biol Marinha, Niteroi, RJ - Brazil
[5] Univ Fed Sao Carlos, Dept Ciencias Ambientais, Sao Carlos, SP - Brazil
[6] Univ Fed Mato Grosso do Sul, Ctr Ciencias Biol, Lab Ecol Movimento & Populacoes, Campo Grande, MS - Brazil
Total Affiliations: 6
Document type: Journal article
Source: Journal of the Marine Biological Association of the United Kingdom; v. 98, n. 7, p. 1767-1773, NOV 2018.
Web of Science Citations: 4

Resource partitioning is considered one of the main processes driving diversification in ecological communities because it allows coexistence among closely related and ecologically equivalent species. We combined three complementary approaches, i.e. the evaluation of foraging behaviour, diet composition and nutritional condition (RNA:DNA ratio), to assess feeding by two closely related (sister) butterflyfishes that are syntopic in Puerto Rico. Chaetodon capistratus had a higher abundance and higher bite rate and selected octocorals and hard corals for feeding, whereas Chaetodon striatus fed preferentially on sandy substrates. Cnidarians and polychaetes were the most representative diet items for both species, but C. capistratus preferred the former (Feeding Index of 74.3%) and C. striatus the latter (Feeding Index of 60.4%). Similar RNA:DNA ratios for both species suggest that, although they differ in feeding rates and diet, C. capistratus and C. striatus have similar nutritional fitness. Therefore, these species are both zoobenthivores but show clear differences in their substrate selection. The differences in the use of foraging substrate by C. capistratus and C. striatus, despite their close phylogenetic relationship and similar diets, suggest that these species coexist by resource partitioning. (AU)

FAPESP's process: 12/24432-4 - Do feeding interactions of reef fishes persist on degraded coral reefs?
Grantee:Roberta Martini Bonaldo
Support type: Scholarships in Brazil - Post-Doctorate