期刊
CORAL REEFS
卷 38, 期 5, 页码 955-960出版社
SPRINGER
DOI: 10.1007/s00338-019-01822-8
关键词
Chaetodontidae; Diet; Deep reefs; Microplastics; Mid-Atlantic Ridge; St. Paul's Rocks
资金
- Fontes Hipertermicas do Arquipelago de Sao Pedro e Sao Paulo (SISBIO) [58069-1]
- Programa de Monitoramento de Longa Duracao das Comunidades Recifais de Ilhas Oceanicas-PELD/ILOC [CNPq 403740/2012-6]
- Programa Arquipelago [CNPq 557185/2009-2, 405386/2012-5]
- FAPESP [2015/24408-4]
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brazil (CAPES)
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [15/24408-4] Funding Source: FAPESP
Chaetodontidae is among the most conspicuous families of fishes in tropical and subtropical coral and rocky reefs. Most ecological studies focus in the genus Chaetodon, while Prognathodes remains poorly understood. Here we provide the first account on the ecology of Prognathodes obliquus, a butterflyfish endemic to St. Peter and St. Paul's Archipelago (SPSPA), Mid-Atlantic Ridge. We studied the depth distribution and foraging behaviour of P. obliquus through technical diving, remote-operated vehicles and submarines. Also, we characterized its diet by analysing stomach contents. Prognathodes obliquus is mostly found below 40 m, with abundance peaking between 90 and 120 m and deepest record to date at 155 m. It forages mostly over sediment, epilithic algal matrix and complex bottoms formed by fused polychaete tubes, preying mostly upon polychaetes, crustaceans, hydroids and bryozoans. Branching black corals were rarely consumed and used mostly as refuge. In conclusion, P. obliquus is a generalist invertebrate feeder typical of mesophotic ecosystems of SPSPA.
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