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SC/69A/SM/04
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Resource ID
20064
Access
Open
Document Number
SC/69A/SM/04
Full Title
Occurrence of Lahille’s Bottlenose Dolphin (Tursiops truncatus ssp. gephyreus) in Bahía Blanca Estuary (Buenos Aires, Argentina). Preliminary information.
Author
Petracci, P., Marbán, L., Sotelo, M., Massola, V., Valese, N., Zuazquita, E And Iñíguez Bessega, M.
Authors Summary
Information about the presence of Lahille’s Bottlenose dolphins (Tursiops truncatus spp gephyreus) at the Bahía Blanca estuary, Argentina, were gathered from opportunistic platforms such as recreational and patrol boats of the reserve wardens. The estuary comprised two provincial protected areas: “Bahía Blanca, Bahía Falsa y Bahía Verde” established in 1998 with 2600km2 and “ Islote de la Gaviota Cangrejera” recently ruled by law 15362 in 2022. Between October 2020 and April 2023, Bottlenose dolphins were recorded 30 times, totaling 190 specimens. The overall SPUE was 0.34 dolphin group/hour. Groups observed range from one to 20 individuals, but most of the groups observed contained between one to eight dolphins (76.6%). The results suggested that “Ferones”, as they are known locally, are year-round at PNRBBFBV. Using Soundtrap acoustic recordings enabled the detection of clicks consistent with records similar to those emitted by Tursiops truncatus. This paper responded to some of the recommendations of the IWC and highlights the importance of the PNRBBFBV in the conservation of this species/ subspecies, since it seems to be one of the few sites in Argentina where they can still be found.
Publisher
IWC
Publication Year
2023
Abstract
Information about the presence of Lahille’s Bottlenose dolphins (Tursiops truncatus spp gephyreus) at the Bahía Blanca estuary, Argentina, were gathered from opportunistic platforms such as recreational and patrol boats of the reserve wardens. The estuary comprised two provincial protected areas: “Bahía Blanca, Bahía Falsa y Bahía Verde” established in 1998 with 2600km2 and “ Islote de la Gaviota Cangrejera” recently ruled by law 15362 in 2022. Between October 2020 and April 2023, Bottlenose dolphins were recorded 30 times, totaling 190 specimens. The overall SPUE was 0.34 dolphin group/hour. Groups observed range from one to 20 individuals, but most of the groups observed contained between one to eight dolphins (76.6%). The results suggested that “Ferones”, as they are known locally, are year-round at PNRBBFBV. Using Soundtrap acoustic recordings enabled the detection of clicks consistent with records similar to those emitted by Tursiops truncatus. This paper responded to some of the recommendations of the IWC and highlights the importance of the PNRBBFBV in the conservation of this species/ subspecies, since it seems to be one of the few sites in Argentina where they can still be found.