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

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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