{"data":[{"source":"bio.acousti.ca","id":"58466","type":"article","title":"In-air acoustic repertoire and associated behaviour of wild juvenile crabeater seals during rehabilitation","author":"Shabangu, Fannie W.; Hofmeyr, G. J. Greg; Probert, Rachel; Connan, Ma\u00eblle; Buhrmann, Corrine A.; Gridley, Tess","editor":null,"year":"2022","month":null,"journal":"Bioacoustics","booktitle":null,"series":null,"howpublished":null,"volume":null,"number":null,"pages":"1-23","chapter":null,"edition":null,"publisher":null,"organization":null,"institution":null,"school":null,"address":null,"type_of_work":null,"note":null,"isbn":null,"issn":"0952-4622, 2165-0586","doi":"10.1080\/09524622.2022.2108145","url":"http:\/\/dx.doi.org\/10.1080\/09524622.2022.2108145","attachments":null,"keywords":null,"abstract":"In-air sounds of pinnipeds are important for interactions with conspecifics and threat displays. However, little is known about the in-air acoustic repertoire and associated behaviour of crabeater seals Lobodon carcinophaga. We investigated the in-air acoustic repertoire and associated behaviour of two male and one female wild juvenile crabeater seals that beached separately, and were rehabilitated in Durban and Gqeberha, South Africa. In-air sounds were visually identified and categorised into five classes validated via random forest model classification: brief, intermediate, and long moan calls, croaks, and hisses. Hisses were common (n = 25,105 sounds from 136 hrs of acoustic recordings) and detected during heightened arousal states and interactions with animal care staff and a conspecific. Furthermore, hisses were also recorded in low arousal states during exhalation. Moan calls (n = 241) were only detected from two of the three seals. During rehabilitation, the female seal ceased producing moan calls and later produced a series of croaks (n = 204). Acoustic characteristics of in-air moan calls differed from published underwater moan calls according to duration, minimum, and maximum frequencies, and pulse repetition rate. Our study shows that the in-air acoustic repertoire and associated behaviour of these Antarctic seals are dynamic, vary inter-individually and are context dependent.","type_name":"Journal Article","journal_abbreviation":null,"pmid":null,"info_url":"https:\/\/bio.acousti.ca\/node\/58466"}]}