Movement and activity patterns of the nurse shark, Ginglymostoma cirratum, in an oceanic Marine Protected Area of the South-western Atlantic

Autor(es)

Garla, Ricardo Clapis ^{[1, 2]} ; Fazzano Gadig, Otto Bismarck ^[1] ; Garrone-Neto, Domingos ^{[1, 3]}

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista UNESP, Elasmobranch, Res Lab, BR-11330900 Sao Vicente, SP - Brazil

^[2] Univ Fed Rio Grande do Norte, Dept Bot Ecol & Zool, BR-59078970 Natal, RN - Brazil

^[3] Univ Estadual Paulista UNESP, Coll Fishery Engn, BR-11900000 Registro, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of the Marine Biological Association of the United Kingdom; v. 97, n. 8, p. 1565-1572, DEC 2017.
• Citações Web of Science: 2

Resumo

The movement and activity patterns of the nurse shark, Ginglymostoma cirratum, a vulnerable species off Brazil, were investigated using mark-recapture and acoustic telemetry at an oceanic insular Marine Protected Area, the Fernando de Noronha Archipelago, Brazil. A total of 93 sharks were captured and tagged, ranging from 82 to 265 cm of total length (TL). Nurse sharks were captured throughout the year, and all life-stages used the insular shelf. Fifteen sharks (16% of the total) were recaptured after periods at liberty ranging from 3.5 h to 705 days, and the distances between tag and recapture locations ranged from 0.07 to 3.5 km. Site fidelity and movements of 10 sharks ranging from 107 to 265 cm TL were investigated for 18 months with an array of automated telemetry receivers. The mean period of detection of the monitored sharks was 66 days, ranging from 13 to 119 days. One individual 158 cm TL was monitored with active tracking for 17 days, with distances between daily locations ranging from 0.84 to 3.32 km, exhibiting movements similar to those of sharks monitored by automated telemetry. Despite remaining motionless or exhibiting short range movements for several hours or days, nurse sharks can be relatively wide-ranging, and protected areas alone cannot be the only conservation measure used to protect this species, which requires a set of protective measures, including fisheries management. (AU)

• Processo FAPESP: 98/15080-8 - Área de vida, ritmos de atividade seleção de habitat e hábitos alimentares do tubarão-de-recifes Carcharhinus perezi, no arquipelogo de Fernando de Noronha, costa Nordeste do Brasil
• Beneficiário: Ricardo Clapis Garla
• Modalidade de apoio: Bolsas no Brasil - Doutorado