Article (Scientific journals)
Comparing perineuronal nets and parvalbumin development between black bird species with differences in early developmental song exposure
Cornez, Gilles; Langro, Justin; Cornil, Charlotte et al.
2020In Journal of Experimental Biology, 223 (Pt1), p. 212910
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Keywords :
Brain plasticity; Song learning; Red-winged blackbirds; PNN; Icteridae; Brown-headed cowbirds; Brood parasitism
Abstract :
[en] Brood parasitic songbirds are a natural system in which developing birds are isolated from species-typical song and therefore present a unique opportunity to compare neural plasticity in song learners raised with and without conspecific tutors. We compared perineuronal nets (PNN) and parvalbumin (PV) in song control nuclei in juveniles and adults of two closely related icterid species (i.e. blackbirds): brown-headed cowbirds (Molothrus ater; brood parasite) and red-winged blackbirds (Agelaius phoeniceus; non-parasite). The number of PV cells per nucleus was significantly higher in adults compared with juveniles in the nucleus HVC and the robust nucleus of the arcopallium (RA), whereas no significant species difference appeared in any region of interest. The number of PNN per nuclei was significantly higher in adults compared with juveniles in HVC, RA and Area X, but only RA exhibited a significant difference between species. PV cells surrounded by PNN (PV+PNN) also exhibited age-related differences in HVC, RA and Area X, but RA was the only region in which PV+PNN exhibited significant species differences. Furthermore, a significant interaction existed in RA between age and species with respect to PNN and PV+PNN, revealing RA as a region displaying differing plasticity patterns across age and species. Additional comparisons of PNN and PV between adult male and female cowbirds revealed that males have greater numbers of all three measures in RA compared with females. Species-, sex- and age-related differences in RA suggest that species differences in neural plasticity are related to differences in song production rather than sensitivity to song learning, despite a stark contrast in early exposure to conspecific male tutors.
Disciplines :
Neurosciences & behavior
Author, co-author :
Cornez, Gilles ;  Université de Liège - ULiège > GIGA
Langro, Justin
Cornil, Charlotte  ;  Université de Liège - ULiège > Neurosciences-Neuroendocrinology
Balthazart, Jacques  ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Département des sciences biomédicales et précliniques
Lynch, Kathleen
Language :
English
Title :
Comparing perineuronal nets and parvalbumin development between black bird species with differences in early developmental song exposure
Publication date :
2020
Journal title :
Journal of Experimental Biology
ISSN :
0022-0949
eISSN :
1477-9145
Publisher :
The Company of Biologists, United Kingdom
Volume :
223
Issue :
Pt1
Pages :
jeb.212910
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
NIH - National Institutes of Health
F.R.S.-FNRS - Fonds de la Recherche Scientifique
Available on ORBi :
since 29 January 2020

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