| Texto completo | |
| Autor(es): |
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]
Número total de Autores: 9
|
| Afiliação do(s) autor(es): | [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
Número total de Afiliações: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of the Marine Biological Association of the United Kingdom; v. 98, n. 7, p. 1767-1773, NOV 2018. |
| Citações Web of Science: | 4 |
| Resumo | |
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) | |
| Processo FAPESP: | 12/24432-4 - A formação de grupos de peixes difere entre recifes de coral dentro e fora de áreas protegidas? |
| Beneficiário: | Roberta Martini Bonaldo |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |