Parrotfish functional morphology and bioerosion on SW Atlantic reefs

Autor(es)

Lellys, Nicole Tiburcio ^[1] ; de Moura, Rodrigo Leao ^{[2, 3]} ; Bonaldo, Roberta Martini ^[4] ; Francini-Filho, Ronaldo Bastos ^[5] ; Gibran, Fernando Zaniolo ^[6]

Afiliação do(s) autor(es)

^[1] Univ Estadual Santa Cruz, BR-45662900 Ilheus, BA - Brazil

^[2] Univ Fed Rio de Janeiro, Inst Biol, BR-21944970 Rio De Janeiro, RJ - Brazil

^[3] Univ Fed Rio de Janeiro, SAGE COPPE, BR-21944970 Rio De Janeiro, RJ - Brazil

^[4] Univ Estadual Campinas, Grp Hist Nat Vertebrados, BR-13083862 Campinas, SP - Brazil

^[5] Univ Fed Paraiba, Ctr Ciencias Aplicadas & Educ, BR-58297000 Rio Tinto, Paraiba - Brazil

^[6] Univ Fed ABC, Ctr Ciencias Nat & Humans, BR-09606070 Sao Bernardo Do Campo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MARINE ECOLOGY-PROGRESS SERIES; v. 629, p. 149-163, OCT 24 2019.
• Citações Web of Science: 0

Resumo

Parrotfishes (Labridae: Scarini) have jaws formed by teeth fused into a beak-like structure in most species, and are classified into 3 functional groups (browsers, scrapers and excavators) based on jaw morphology, foraging behavior and feeding impact on the benthos. We compared the feeding morphology of 3 parrotfish species in the Abrolhos Bank, SW Atlantic. We also estimated rates of bioerosion caused by the largest and most abundant parrotfish in the region, Scarus trispinosus, and compared them to literature estimates from 12 species. The 3 studied species differed in dentary, suspensorium and mouth/head height. Large (>40 cm) Sc. trispinosus individuals were functionally classified as excavators because of their body size, robust premaxilla and jaws with simple joints, in addition to the large proportion of their bites leaving pronounced marks on the substratum. Large (>40 cm) adult Sparisoma amplum were also classified as excavators because of their mouth/head height, dentary and suspensorium size and robust jaws (dentary) with simple joints. Sc. zelindae had the most mobile jaw among the 3 species and was functionally classified as a scraper, as were juveniles or initial phases of the other 2 species. Body size and feeding rates of Sc. trispinosus were positively correlated with the volume of substratum removed, with large adults removing 207 cm(3) d(-1) and eroding similar to 75 500 cm 3 yr(-1). Our results reinforce the importance of studies on jaw morphology and osteology for the assessment of parrotfish feeding modes, and indicate that large adult Sc. trispinosus and Sp. amplum play unique roles as excavating fishes in the Abrolhos Bank. (AU)

• Processo FAPESP: 14/19079-9 - Macro-herbívoros-chave: qual a importância dos peixes das famílias Labridae e Acanthuridae (Actinopterygii) na dinâmica e resiliência do sistema recifal dos Abrolhos?
• Beneficiário: Fernando Zaniolo Gibran
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• 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