Development of vocalization and hearing in American mink (Neovison vison)

Christian Brandt, Jens Malmkvist, Rasmus L Nielsen, Nanna Brande-Lavridsen, Annemarie Surlykke

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Abstrakt

American mink (Neovison vison) kits are born altricial and fully dependent 40 on maternal care, for which the kits' vocalisations appear essential. We used Auditory Brainstem Recording (ABR) to determine (1) hearing sensitivity of adult females from two breeding lines known to differ in maternal behaviour and (2) development of hearing in kits 8-52 days of age. We also studied sound production in 20 kits throughout postnatal days 1 to 44. Adult female mink had a broad hearing range from 1 kHz to above 70 kHz, with peak sensitivity (threshold of 20 dB SPL) at 8-10 kHz, and no difference in sensitivity between the two breeding lines (P>0.22) to explain the difference in maternal care. Mink kits showed no signs of hearing up to postnatal day 24. From day 30 all kits had ABRs indicative of hearing. Hearing sensitivity increased with age, but was still below the adult level at postnatal day 52. When separated from their mothers kits vocalized loudly. Until age 22 days, 90% of all kits vocalized with no significant decline with age (P=0.27). From day 25, concurrent with the start of hearing, the number of vocalizing kits decreased with age (P
OriginalsprogEngelsk
TidsskriftJournal of Experimental Biology
Vol/bind216
Udgave nummer18
Sider (fra-til)3542-3550
ISSN0022-0949
DOI
StatusUdgivet - 2013

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  • Citationsformater

    Brandt, C., Malmkvist, J., Nielsen, R. L., Brande-Lavridsen, N., & Surlykke, A. (2013). Development of vocalization and hearing in American mink (Neovison vison). Journal of Experimental Biology, 216(18), 3542-3550. https://doi.org/10.1242/jeb.080226