Abstract:
:Norepinephrine (NE) is involved in a variety of behaviors across vertebrate species. In songbirds, NE is involved in singing and auditory perception, fundamental components of pair formation. Mechanisms of pairing remain poorly understood in avian species. NE is likely involved given its role in vocal communication and perception. Here, we tested the hypothesis that DSP-4 treatments (a noradrenergic neurotoxin that decreases NE) decreases singing in males, song perception in females and pairing in both sexes using a naturalistic paradigm. Females were tested for preferences of either control or DSP-4 males in a two-choice paradigm using live males. Both sexes were then tested for courtship and pair formation in aviaries. In the two-choice paradigm, control females showed a significant preference for control males over DSP-4 males, whereas DSP-4 females showed no such preference. In the aviary tests, DSP-4 males engaged in less courtship behavior, showed decreased pairing behaviors and increased pair latencies compared to control males. In females, DSP-4 treatments did not alter courtship or pairing behavior. Lower neural densities of noradrenergic fibers in song, auditory, and affiliative regions were observed in DSP-4 animals of both sexes. Furthermore, DBH-ir densities in these regions explained variations in courtship and pairing behaviors, as well as pairing status. Our results extend previous findings to naturalistic contexts, provide evidence that DBH-ir densities in specific regions correlate with pairing-related behaviors, and inform us of sex differences in the role of NE in pairing.
journal_name
Behav Brain Resjournal_title
Behavioural brain researchauthors
Vahaba DM,Lacey WH,Tomaszycki MLdoi
10.1016/j.bbr.2013.05.056subject
Has Abstractpub_date
2013-09-01 00:00:00pages
164-75eissn
0166-4328issn
1872-7549pii
S0166-4328(13)00335-5journal_volume
252pub_type
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