Results 41 to 50 of about 7,418 (180)

Resurgent Na+ currents promote ultrafast spiking in projection neurons that drive fine motor control

Nature Communications, 2021
The zebra finch robust nucleus of the arcopallium (RA) directs singing by providing descending projections to brainstem motor neurons. The authors show that electrophysiological characteristics of RA neurons rely on resurgent Na+ currents that emerge ...
Benjamin M. Zemel, Alexander A. Nevue, Andre Dagostin, Peter V. Lovell, Claudio V. Mello, Henrique von Gersdorff   +5 more
doaj   +1 more source

Cardiac morphological and morphometric analysis of Ardea alba

The Anatomical Record, EarlyView.
Abstract Ardea alba (Linnaeus, 1758) is a widely distributed heron species whose cardiovascular morphology remains poorly described. This study aimed to characterize the cardiac morphology and morphometry of adult A. alba. Ten specimens were analyzed using radiographic, morphometric, histological, scanning electron microscopy, and three‐dimensional ...
Julia Vaz Feio, Max Alex Santos Ferreira, Elane Guerreiro Giese, Érika Branco, Antônio Basílio Guerreiro Junior, Ana Rita de Lima   +5 more
wiley   +1 more source

Gene duplication and fragmentation in the zebra finch major histocompatibility complex

BMC Biology, 2010
Background Due to its high polymorphism and importance for disease resistance, the major histocompatibility complex (MHC) has been an important focus of many vertebrate genome projects. Avian MHC organization is of particular interest because the chicken
Burt David W, Kotkiewicz Holly, Godinez Ricardo, Westerdahl Helena, Völker Martin, Ekblom Robert, Balakrishnan Christopher N, Graves Tina, Griffin Darren K, Warren Wesley C, Edwards Scott V   +10 more
doaj   +1 more source

Differential sensitivity to SHH signaling and neural crest‐mediated Gas1 expression regulate jaw size during development and evolution

Developmental Dynamics, EarlyView.
Abstract Background Developmental control of jaw size is crucial to prevent birth defects and facilitate evolutionary adaptation. We have shown that jaw size is established by neural crest mesenchyme (NCM), which are progenitor cells that migrate into the mandibular primordia and produce the jaws.
Zuzana Vavrušová, Daniel B. Chu, An Nguyen, Yeniko Ta, Jennifer L. Fish, Richard A. Schneider   +5 more
wiley   +1 more source

Maternal effects underlie ageing costs of growth in the zebra finch (Taeniopygia guttata). [PDF]

PLoS ONE, 2014
Maternal effects provide a mechanism to adapt offspring phenotype and optimize the mother's fitness to current environmental conditions. Transferring steroids to the yolk is one way mothers can translate environmental information into potential adaptive ...
Mathilde L Tissier, Tony D Williams, François Criscuolo   +2 more
doaj   +1 more source

Offspring Global DNA Methylation is not Affected by Parental Developmental Stress Experience in a Passerine Species

Journal of Experimental Zoology Part A: Ecological and Integrative Physiology, EarlyView.
ABSTRACT Rapid phenotypic change may be mediated by intergenerational transmission of early developmental experiences. In birds, exposure to glucocorticoids during early development can alter global DNA methylation and gene expression. However, DNA methylation is labile, and it is currently unclear whether the impacts of stress suffered during juvenile
Anna Miltiadous, Harrison J. F. Eyck, Ondi L. Crino, Lee A. Rollins, Damien Callahan, Katherine L. Buchanan   +5 more
wiley   +1 more source

Effects of off‐highway vehicle activity on Arizona wildlife: a systematic literature review

The Journal of Wildlife Management, EarlyView.
The published literature indicates that off‐highway vehicles (OHVs) predominantly negatively affect native Arizona amphibians, mammals, and reptiles, while effects of OHVs on native Arizona birds are mostly unknown or neutral. Abstract Off‐highway vehicle (OHV) recreation has dramatically increased in Arizona, USA, prompting concerns about potential ...
Hayden K. Hutcherson, Cassidy A. Klovanish, Samuel D. Lisak, Esther S. Rubin, Reilly T. Jackson   +4 more
wiley   +1 more source

The pectoralis muscle orientation as an indicator of the modes of wing‐propelled locomotion in birds

Journal of Anatomy, EarlyView.
The pectoralis orientation of birds was consistent with the orientation of the aerodynamic force acting on the wing, varying by wing‐propelled locomotion (WPL) mode. The skeletal morphology unique to each WPL mode, related to the origin/insertion of the pectoralis, may be associated with these functional demands of pectoralis orientation.
Takumi Akeda, Shin‐ichi Fujiwara
wiley   +1 more source

Syrinx anatomy and vocalizations in New World vultures (Aves: Cathartidae): Implications for avian vocal evolution

Journal of Anatomy, EarlyView.
New World vultures are the only avian clade proposed to lack a syrinx and have been described as non‐vocal. Using dissection, diceCT, and histology, we demonstrate that cathartid vultures have novel syringeal features that form a syrinx and vocal characterization reveals that they produce more complex vocalizations than previously reported.
Bradley A. Ibarra, Carmen A. Urban, Lucas J. Legendre, Julia A. Clarke   +3 more
wiley   +1 more source

Analysis of CR1 Repeats in the Zebra Finch Genome [PDF]

Journal of Systemics, Cybernetics and Informatics, 2013
Most bird species have smaller genomes and fewer repeats than mammals. Chicken Repeat 1 (CR1) repeat is one of the most abundant families of repeats, ranging from ~133,000 to ~187,000 copies accounting for ~50 to ~80% of the interspersed repeats in the ...
George E. Liu, Yali Hou, Twain Brown
doaj