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New Evidence for Bottlenose dolphin (Tursiops spp.) Population Connectivity between kangaroo island and South Australian Mainland Waters

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Open Journal of Marine Science 2018年第1期8卷 38-50页

作者： Nardi Cribb Phyll Bartram Tony Bartram Laurent Seuront School of Biological Sciences Flinders University Adelaide Australia kangaroo island/victor harbor dolphin watch Kangaroo Island Australia

Limited information still exists on the movements of bottlenose dolphins in South Australian coastal waters. There is, however, a need to overcome this paucity of information for an effective development and implementation of conservation and management initiatives in these waters that are increasingly threatened by anthropogenic activities. This study infers potential movements of bottlenose dolphins (Tursiops spp.) between kangaroo island that separate and shelter South Australian coastal waters from the Southern Ocean swell, and the South Australian mainland (The Fleurieu Peninsula and The Adelaide dolphin Sanctuary). Bottlenose dolphins were identified from three separate photo-identification catalogues collated from around the South Australian coastline. Of the 3518, 654 and 181 dolphins sighted in kangaroo island, Fleurieu Peninsula and the Adelaide dolphin Sanctuary, 233, 74 and 40 individuals were recognizable, respectively. Resighting rates were similar in kangaroo island (70.4%) and Fleurieu Peninsula (75.7%), but much lower in the Adelaide dolphin Sanctuary (35%). Ten individuals were resighted between kangaroo island and the Fleurieu Peninsula, whilst no matches were made between these two locations and the Adelaide dolphin Sanctuary catalogue. This suggests a longitudinal connectivity between kangaroo island and South Australian mainland waters, but a lack of latitudinal connectivity that may result from the physical stratification processes that separate northern and southern South Australian waters. Our results also demonstrate the highly mobile nature of this species within South Australian waters as well as establish photo-identification as an effective non-invasive tool in which to monitor long-term movement patterns).

关键词： Bottlenose dolphin Habitat South Australia Connectivity Conservation

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Fission-fusion dynamics of a pelagic delphinid in the arctic:the white-beaked dolphin(Lagenorhynchus albirostris)

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Integrative Zoology 2021年第4期16卷 512-526页

作者： Chiara G.BERTULLI Marianne H.RASMUSSEN Massimiliano ROSSO Department of Life and Environmental Sciences University of IcelandReykjavikIceland Sea watch Foundation New QuayUK Húsavík Research Centre University of IcelandHúsavíkIceland CIMA Research Foundation SavonaItaly

Delphinids exhibit great variability in their social *** is therefore important to document lesser known species,in extreme changing habitats,to compare and contrast mechanisms driving ***,we describe the first long-term assessment of social structure of white-beaked dolphins(Lagenorhynchus albirostris)using a compiled version of SOCPROG 2.8 and an 11-year photo-identification dataset(2002–2013)collected from whalewatching vessels at 2 sites(Faxaflói and Skjálfandi bays)off *** identified a total of 487 dolphins which are suggested to be part of an open population as shown by the discovery curve obtained analyzing photo-id *** social analyses were restricted to 35 adults which were sighted on≥5 different *** mean residency time of white-beaked dolphins in our 2 study areas was of 95 days(SE=35.63;95%CI:23-171),with the“migration-full interchange”model best describing movements of dolphins in and out of our 2 study *** differentiation in this population was high(Likelihood:S=0.87,SE=0.04;r=0.31,SE=0.03)indicating diverse,non-random social *** associations best fit the model of“casual acquaintances”against the standardized lagged association rates with the majority of white-beaked dolphin associations being short-term,but with a few long-term across *** for preferred companionship,long-term associations are favored over *** this study,associations among white-beaked dolphins are short-term but with desirably long-term associations fitting into a society with fission-fusion *** information expands the latitudinal range for which social structure has been described for oceanic dolphin species.

关键词： association patterns Iceland Lagenorhynchus albirostris social structure white-beaked dolphin

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