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  1. Article ; Online: Sex Differences in Forebrain Monoaminergic Response to Song Performance.

    Lyons, Susan M / Sockman, Keith W

    Brain, behavior and evolution

    2017  Volume 89, Issue 3, Page(s) 219–230

    Abstract: In many species, successful reproduction is dependent on the ability to adjust social behavior in response to an ever-changing social environment. Because a sexual signal's value and meaning can differ between females and males, responses to those ... ...

    Abstract In many species, successful reproduction is dependent on the ability to adjust social behavior in response to an ever-changing social environment. Because a sexual signal's value and meaning can differ between females and males, responses to those signals should also differ. One way individuals can modulate social behavior is through experience-dependent modulation of the sensory systems that process social signals. Central monoamines (norepinephrine, dopamine, serotonin) modulate neural sensitivity to social stimuli and are key regulators of experience-dependent neuroplasticity in vertebrate sensory systems. However, few studies have examined how exposure to different sexual signals influences monoaminergic activity in female compared to male sensory systems. We used Lincoln's sparrows (Melospiza lincolnii) to examine sex differences in how variation in the trill performance of song influences central monoaminergic activity in the auditory telencephalon. Trill performance measures the rate at which a song syllable is produced relative to the syllable's frequency bandwidth and is thought to reflect the difficulty with which songs are produced. High-performance trills are more threatening to males but more attractive to females. We found that the effects of trill performance on monoaminergic activity were sex-dependent. Relative to the response to low-performance songs, exposure to high-performance songs decreased noradrenergic activity in the caudomedial nidopallium, and tended to decrease serotoninergic activity in the caudomedial mesopallium and caudomedial nidopallium of the auditory telencephalon in females, but in males, the monoamine measurements were indistinguishable between song treatments. These results suggest that the mechanisms underlying sensory processing of male sexual signals differ between the sexes.
    Language English
    Publishing date 2017
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 1199-x
    ISSN 1421-9743 ; 0006-8977
    ISSN (online) 1421-9743
    ISSN 0006-8977
    DOI 10.1159/000471784
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

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  2. Article ; Online: How Song Experience Affects Female Mate-Choice, Male Song, and Monoaminergic Activity in the Auditory Telencephalon in Lincoln's Sparrows.

    Sockman, Keith W / Lyons, Susan M

    Integrative and comparative biology

    2017  Volume 57, Issue 4, Page(s) 891–901

    Abstract: A sexual signal can indicate not only the signaler's attractiveness as a potential mate but also the signaler's competitiveness relative to rivals. As the attractiveness or competitiveness of the prevailing signaling environment increases, individuals ... ...

    Abstract A sexual signal can indicate not only the signaler's attractiveness as a potential mate but also the signaler's competitiveness relative to rivals. As the attractiveness or competitiveness of the prevailing signaling environment increases, individuals prospecting for mates should change their choice threshold, whereas competing individuals should shift resources toward elevating their own competitiveness. Previous studies show that experimental elevations of song competition increase male competitive behavior in Lincoln's sparrows (Melospiza lincolnii) and European starlings (Sturnus vulgaris). Through a series of experimental manipulations using laboratory-housed Lincoln's sparrows, we have also discovered that females change the strength of their song preferences depending on the attractiveness of the song environment to which they have recently been exposed; compared to a less-attractive environment, a highly-attractive environment elevates the threshold for releasing phonotaxis behavior toward male song. These behavioral adjustments are associated with changes in forebrain monoaminergic activity that are triggered by experimental manipulations of the quality of the song environment. Findings from these studies suggest possible neural mechanisms for the regulation of adaptive behavioral plasticity associated with dynamic sexual signaling environments.
    MeSH term(s) Animals ; Female ; Male ; Mating Preference, Animal ; Songbirds/physiology ; Sparrows/physiology ; Telencephalon/physiology ; Vocalization, Animal
    Language English
    Publishing date 2017-10-09
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 2159110-6
    ISSN 1557-7023 ; 1540-7063
    ISSN (online) 1557-7023
    ISSN 1540-7063
    DOI 10.1093/icb/icx080
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Sex Differences in Forebrain Monoaminergic Response to Song Performance

    Lyons, Susan M. / Sockman, Keith W.

    Brain, Behavior and Evolution

    2017  Volume 89, Issue 3, Page(s) 219–230

    Abstract: In many species, successful reproduction is dependent on the ability to adjust social behavior in response to an ever-changing social environment. Because a sexual signal's value and meaning can differ between females and males, responses to those ... ...

    Institution Department of Biology, and Curriculum in Neurobiology, University of North Carolina, Chapel Hill, NC, USA
    Abstract In many species, successful reproduction is dependent on the ability to adjust social behavior in response to an ever-changing social environment. Because a sexual signal's value and meaning can differ between females and males, responses to those signals should also differ. One way individuals can modulate social behavior is through experience-dependent modulation of the sensory systems that process social signals. Central monoamines (norepinephrine, dopamine, serotonin) modulate neural sensitivity to social stimuli and are key regulators of experience-dependent neuroplasticity in vertebrate sensory systems. However, few studies have examined how exposure to different sexual signals influences monoaminergic activity in female compared to male sensory systems. We used Lincoln's sparrows (Melospiza lincolnii) to examine sex differences in how variation in the trill performance of song influences central monoaminergic activity in the auditory telencephalon. Trill performance measures the rate at which a song syllable is produced relative to the syllable's frequency bandwidth and is thought to reflect the difficulty with which songs are produced. High-performance trills are more threatening to males but more attractive to females. We found that the effects of trill performance on monoaminergic activity were sex-dependent. Relative to the response to low-performance songs, exposure to high-performance songs decreased noradrenergic activity in the caudomedial nidopallium, and tended to decrease serotoninergic activity in the caudomedial mesopallium and caudomedial nidopallium of the auditory telencephalon in females, but in males, the monoamine measurements were indistinguishable between song treatments. These results suggest that the mechanisms underlying sensory processing of male sexual signals differ between the sexes.
    Keywords Monoamine ; Norepinephrine ; Pallium ; Serotonin ; Sex differences ; Songbird ; Song performance ; Auditory telencephalon ; Catecholamine ; Dopamine
    Language English
    Publishing date 2017-05-09
    Publisher S. Karger AG
    Publishing place Basel, Switzerland
    Document type Article
    Note Original Paper
    ZDB-ID 1199-x
    ISSN 1421-9743 ; 0006-8977
    ISSN (online) 1421-9743
    ISSN 0006-8977
    DOI 10.1159/000471784
    Database Karger publisher's database

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    In stock of ZB MED Cologne/Königswinter

    Zs.B 261: Show issues Location:
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  4. Article ; Online: Sound-induced monoaminergic turnover in the auditory forebrain depends on endocrine state in a seasonally-breeding songbird.

    Rodríguez-Saltos, Carlos A / Lyons, Susan M / Sockman, Keith W / Maney, Donna L

    Journal of neuroendocrinology

    2018  , Page(s) e12606

    Abstract: Sensory responses to courtship signals can be altered by reproductive hormones. In seasonally-breeding female songbirds, for example, sound-induced immediate early gene expression in the auditory pathway is selective for male song over behaviourally ... ...

    Abstract Sensory responses to courtship signals can be altered by reproductive hormones. In seasonally-breeding female songbirds, for example, sound-induced immediate early gene expression in the auditory pathway is selective for male song over behaviourally irrelevant sounds only when plasma estradiol reaches breeding-like levels. This selectivity has been hypothesized to be mediated by release of monoaminergic neuromodulators in the auditory pathway. We previously showed that in oestrogen-primed female white-throated sparrows, exposure to male song induced dopamine and serotonin release in auditory regions. In order to mediate hormone-dependent selectivity, this release must be (1) selective for song and (2) modulated by endocrine state. Therefore, in the current study we addressed both questions by conducting playbacks of song or a control sound to females in a breeding-like or non-breeding endocrine state. We then used high performance liquid chromatography to measure turnover of dopamine, norepinephrine, and serotonin in the auditory midbrain and forebrain. We found that sound-induced turnover of dopamine and serotonin did in fact depend on endocrine state; hearing sound increased turnover in the auditory forebrain only in the birds in a breeding-like endocrine state. Contrary to our expectations, these increases occurred in response to either song or artificial tones; in other words, they were not selective for song. The selectivity of sound-induced monoamine release was thus strikingly different from that of immediate early gene responses described in previous studies. We did, however, find that constitutive monoamine release was altered by endocrine state; whether the birds heard sound or not, turnover of serotonin in the auditory forebrain was higher in a breeding-like state than in a non-breeding endocrine state. Our results suggest that dopaminergic and serotonergic responses to song and other sounds, as well as serotonergic tone in auditory areas, could be seasonally modulated. This article is protected by copyright. All rights reserved.
    Language English
    Publishing date 2018-05-08
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1007517-3
    ISSN 1365-2826 ; 0953-8194
    ISSN (online) 1365-2826
    ISSN 0953-8194
    DOI 10.1111/jne.12606
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 2634: Show issues Location:
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    Jg. 1995 - 2021: Lesesall (2.OG)
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  5. Article ; Online: Contrast influences female attraction to performance-based sexual signals in a songbird.

    Lyons, Susan M / Beaulieu, Michaël / Sockman, Keith W

    Biology letters

    2014  Volume 10, Issue 10, Page(s) 20140588

    Abstract: Animals do not make decisions in a bubble but often refer to previous experience when discriminating between options. Contrast effects occur when the value of a stimulus affects the response to another value of the stimulus, and the changes in value and ... ...

    Abstract Animals do not make decisions in a bubble but often refer to previous experience when discriminating between options. Contrast effects occur when the value of a stimulus affects the response to another value of the stimulus, and the changes in value and response are in the same direction. Although contrast effects appear irrational, they could benefit decision makers when there is spatial or temporal variation and autocorrelation in the value of stimuli that elicit decisions. Here, we examined whether contrasts influence female evaluation of male performance-based sexual signals. We exposed female Lincoln's sparrows (Melospiza lincolnii) to one week of songs that we had experimentally reduced or elevated in performance, followed by a novel song of intermediate performance. We found that high-performance songs were more attractive to females than low-performance songs. Moreover, the intermediate songs were more attractive following exposure to low- than to high-performance songs. These results indicate that contrast can influence evaluation of performance-based sexual stimuli. By examining contrast effects in the ecologically relevant context of mate choice for performance, we can better understand both the adaptive value of comparative evaluation as well as the mechanisms that underlie variation in mate choice and sexual selection.
    MeSH term(s) Acoustic Stimulation ; Animals ; Choice Behavior ; Female ; Male ; Mating Preference, Animal/physiology ; Sparrows/physiology ; Vocalization, Animal
    Language English
    Publishing date 2014-10-16
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 2135022-X
    ISSN 1744-957X ; 1744-9561
    ISSN (online) 1744-957X
    ISSN 1744-9561
    DOI 10.1098/rsbl.2014.0588
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

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  6. Article: Male-trait-specific variation in female mate preferences

    Lyons, Susan M / Debora Goedert / Molly R. Morris

    The Association for the Study of Animal Behaviour Animal behaviour. 2014 Jan., v. 87

    2014  

    Abstract: Empirical studies identifying the causes of variation in mate preference are needed to assist in determining when variation is adaptive. We examined the strength of female preference in the swordtail fish Xiphophorus multilineatus for two sexually ... ...

    Abstract Empirical studies identifying the causes of variation in mate preference are needed to assist in determining when variation is adaptive. We examined the strength of female preference in the swordtail fish Xiphophorus multilineatus for two sexually selected male traits (body size and symmetrical bar number) across variation in both embryonic and postembryonic environments. We measured brood size, then split fry from each brood into high- and low-quality diet treatments. Once females reached sexual maturity, we tested their mate preferences using dummies in dichotomous choice tests. Both the embryonic (brood size) and postembryonic (diet) environment influenced females' strength of preference for symmetrical bar number; females from smaller broods as well as females raised on high-quality diets had a stronger preference for symmetrical bars. However, only the postembryonic environment influenced preference for male size, with females on the low-quality diet having a stronger preference for larger males. There was no relationship between the strength of preference for the two traits across females. Our results demonstrate that plasticity in mate preferences can depend on the specific traits being assessed. We hypothesize that at least one of the preferences may be tracking the conditions that influence signal reliability of the preferred trait. In addition, we demonstrate an influence of the embryonic environment on mate preference, which is rarely considered or controlled for in studies of adaptive variation in mate preferences.
    Keywords Xiphophorus multilineatus ; animal behavior ; body size ; diet ; females ; fish ; males ; mating behavior ; sexual maturity
    Language English
    Dates of publication 2014-01
    Size p. 39-44.
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 281-1
    ISSN 0003-3472
    ISSN 0003-3472
    DOI 10.1016/j.anbehav.2013.10.001
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

    Z 71/741: Show issues

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  7. Book: International tax glossary

    Lyons, Susan M

    1996  

    Author's details Ed.: Susan M. Lyons
    Keywords Steuerrecht ; Welt
    Language English
    Size VIII, 356 S, 20 cm
    Edition Rev. 3. ed
    Publisher IBFD Publ
    Publishing place Amsterdam
    Document type Book
    ISBN 9070125854 ; 9789070125851
    Database Former special subject collection: coastal and deep sea fishing

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  8. Book: International tax glossary

    Lyons, Susan M

    1996  

    Author's details Ed.: Susan M. Lyons
    Keywords Steuerrecht ; Welt
    Language English
    Size VIII, 356 S, 20 cm
    Edition Rev. 3. ed
    Publisher IBFD Publ
    Publishing place Amsterdam
    Document type Book
    ISBN 9070125854 ; 9789070125851
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  9. Book: International tax glossary

    Lyons, Susan M

    1996  

    Author's details Ed.: Susan M. Lyons
    Keywords Steuerrecht ; Welt
    Language English
    Size VIII, 356 S, 20 cm
    Edition Rev. 3. ed
    Publisher IBFD Publ
    Publishing place Amsterdam
    Document type Book
    ISBN 9070125854 ; 9789070125851
    Database ECONomics Information System

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  10. Book: International tax glossary

    Lyons, Susan M

    1992  

    Author's details ed.: Susan M. Lyons
    Language English ; German ; French
    Size VI, 295 S
    Edition Rev., 2. ed
    Publisher Internat. Bureau of Fiscal Documentation
    Publishing place Amsterdam
    Document type Book
    Note Vokabular in dt., engl. und franz. Sprache ; NUGI 696"--T.p. verso
    ISBN 9070125609 ; 9789070125608
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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