Produção Nacional
Revisado por pares
A note on site fidelity of marine tucuxis (Sotalia fluviatilis) in Guanabara Bay, southeastern Brazil
2023; Volume: 6; Issue: 3 Linguagem: Inglês
10.47536/jcrm.v6i3.769
ISSN2312-2692
AutoresAlexandre de Freitas Azevedo, José Lailson‐Brito, Haydee A. Cunha, Monique Van Sluys,
Tópico(s)Ichthyology and Marine Biology
ResumoSince 1995, photo-identification techniques have been used to study the marine tucuxis (Sotalia fluviatilis) found in Guanabara Bay (22°50’S, 43°10’W), southeastern Brazil. The bay is surrounded by a metropolitan complex and is the most degraded area of this species’ distribution. From May 1995 to June 2003, 47 photo-identification boat surveys were conducted in the bay. Sixty-nine individuals were identified and catalogued. The results indicate that individual tucuxis have high site fidelity in Guanabara Bay. On average, dolphins were seen for 4.5 consecutive years, with a range of 1 to 8 years. Additionally, calves have remained in the area beyond sexual maturity. Guanabara Bay provides food and breeding grounds for this dolphin population, despite its high degree of degradation. The fact that such a small dolphin population, composed of resident individuals, depends on such a degraded area may pose serious problems for its conservation.
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