Atypical residency of short-beaked common dolphins (Delphinus delphis) to a shallow, urbanised embayment in south-eastern Australia
MetadataShow full item record
Short-beaked common dolphins (Delphinus delphis) are typically considered highly mobile, offshore delphinids. This study assessed the residency of a small community of short-beaked common dolphins in the shallow, urbanized Port Phillip Bay, south-eastern Australia. The ability to identify common dolphins by their dorsal fin markings and coloration using photo-identification was also investigated. Systematic and non-systematic boat surveys were undertaken between 2007 and 2014. Results showed that 13 adult common dolphins and their offspring inhabit Port Phillip Bay, of which 10 adults exhibit residency to the bay. The majority of these adults are reproductively active females, suggesting that female philopatry may occur in the community. Systematic surveys conducted between 2012 and 2014 revealed that the dolphins were found in a median water depth of 16 m and median distance of 2.2 km from the coast. The shallow, urbanized habitat of this resident common dolphin community is atypical for this species. As a result, these common dolphins face threats usually associated with inshore bottlenose dolphin communities. We suggest that the Port Phillip Bay common dolphin community is considered and managed separate to those outside the embayment and offshore to ensure the community's long-term viability and residency in the bay.
Showing items related by title, author, creator and subject.
Spatial range, social structure and behaviour of ‘resident’ short-beaked common dolphins (Delphinus delphis) in the Port Phillip embayment: considerations for their future management and conservationMason, Suzanne Jane (2016)This study investigated a small community of around 30 short-beaked common dolphins (Delphinus delphis) that show atypical residency to shallow, urbanised Port Phillip Bay, south-eastern Australia. Social structure analyses ...
Risk versus reward: Interactions, depredation rates, and bycatch mitigation of dolphins in demersal fish trawlsSantana Garcon, Julia; Wakefield, Corey; Dorman, S.; Denham, A.; Blight, S.; Molony, B.; Newman, Stephen (2018)© 2018, Canadian Science Publishing. All rights reserved. An improved understanding of interaction dynamics between dolphins and trawlers is essential for improving bycatch mitigation strategies. In-situ observations using ...
Identification of a resident community of bottlenose dolphins (Tursiops aduncus) in the Swan Canning Riverpark, Western Australia, using behavioural informationChabanne, D.; Finn, H.; Salgado Kent, Chandra; Bejder, L. (2012)Identifying appropriate management units is vital for wildlife management. Here we investigate one potential management unit – resident communities of bottlenose dolphins – using information from ranging, occupancy, and ...