Results 31 to 40 of about 15,406 (254)

Comparative anatomy of the passerine carpometacarpus helps illuminate the early fossil record of crown Passeriformes [PDF]

, 2023
The hyper‐diverse clade Passeriformes (crown group passerines) comprises over half of extant bird diversity, yet disproportionately few studies have targeted passerine comparative anatomy on a broad phylogenetic scale.
Field, Daniel J, Benson, Roger BJ, Steell, Elizabeth M, Nguyen, Jacqueline MT   +3 more
core   +1 more source

Using large-scale citizen science ringing data as a means of calculating maximum longevity in birds

Bothalia: African Biodiversity & Conservation, 2019
This article calculates estimates of avian longevity for southern African Passeriformes and demonstrates the impact citizen scientists have on data volumes curated by the South African Bird Ringing Unit (SAFRING).
Dane M. Paijmans, Sanjo Rose, Hans-Dieter Oschadleus   +2 more
doaj   +1 more source

Female collared flycatchers adjust yolk testosterone to male age, but not to attractiveness [PDF]

, 2004
The differential allocation hypothesis predicts that females invest more resources into reproduction when mating with attractive males. In oviparous animals this can include prefertilization decisions such as the production of larger eggs and the ...
Garamszegi, L., Schwabl, Hubert, Schwabl, H., Gábor Michl, Török, János, T\uf6r\uf6k, J\ue1nos, P\ue9czely, P\ue9ter, János Török, Michl, G\ue1bor, Peczely, P., László Z. Garamszegi, Torok, J., Péczely, Péter, Péter Péczely, Garamszegi, L\ue1szl\uf3, Hubert Schwabl, Michl, G., Garamszegi, László Zsolt   +17 more
core   +1 more source

Understanding the spacing of placodes in the eye: A comparative study across age and species

The Anatomical Record, EarlyView.
Abstract The conjunctival placodes of the avian eye form in an intriguing and conserved sequence in a circular annulus around the cornea. These 13–16 placodes develop into papillae that are essential for inducing underlying intramembranous flat bones, known as scleral ossicles, which form an important part of the ocular skeleton.
Florence Joseph, Tamara A. Franz‐Odendaal   +1 more
wiley   +1 more source

Clade‐wide morphological and functional variation of the sauropsid columella

The Anatomical Record, EarlyView.
Abstract The columella (=stapes) is the middle ear bone of reptiles that transmits vibrations from the environment to the inner ear. It has been shown to exhibit extensive interspecific morphological disparity in several clades; however, its morphological variation and associated functional consequences remain poorly described.
John Peacock, Serjoscha W. Evers, Tiago R. Simões, Garth M. Spellman, Daniel J. Field   +4 more
wiley   +1 more source

Salmonella and Salmonellosis in Wild Birds

Animals
Salmonella enterica is an important bacterial pathogen in humans and warm-blooded animals. Wild bird species represent both a potential reservoir for zoonotic infection and as a susceptible host to infection by host-adapted variants.
Paul Wigley
doaj   +1 more source

Biomass, abundances, and abundance and geographical range size relationship of birds along a rainforest elevational gradient in Papua New Guinea [PDF]

PeerJ, 2020
The usually positive inter-specific relationship between geographical range size and the abundance of local bird populations comes with exceptions. On continents, the majority of these exceptions have been described from tropical montane areas in Africa,
Katerina Sam, Bonny Koane
doaj   +2 more sources

Gene duplication and fragmentation in the zebra finch major histocompatibility complex [PDF]

, 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.
Tina Graves, Griffin, D.K., Wesley C Warren, Edwards, Scott, Völker, Martin, Völker Martin, Westerdahl Helena, Burt, D.W., Graves, Tina, Griffin Darren K, Martin Völker, Burt, David W, Darren K Griffin, Helena Westerdahl, Godinez Ricardo, Edwards, S.V., Edwards, Scott V, Kotkiewicz, H., Ekblom, Robert,, Ekblom Robert, Warren, Wesley C, Warren, W.C., Ekblom, Robert, Robert Ekblom, David W Burt, Ricardo Godinez, Warren, Wesley C., Scott V Edwards, Lund University., Griffin, Darren K., Godinez, Ricardo, Westerdahl, Helena, Ekblom, R., Westerdahl, Helena,, Edwards, Scott V., Kotkiewicz, Holly, Voelker, Martin, Graves Tina, Christopher N Balakrishnan, Balakrishnan, Christopher N, Godinez, R., Warren Wesley C, Burt David W, Balakrishnan, Christopher N., Kotkiewicz Holly, Griffin, Darren K, Westerdahl, H., Balakrishnan Christopher N, Balakrishnan, C.N., Graves, T., Graves, Tina A., Burt, David W., Holly Kotkiewicz, Volker, M., Edwards Scott V   +54 more
core   +1 more source

Bite force estimates and morphological correlations of jaw muscles in parrots

The Anatomical Record, EarlyView.
Abstract Parrots (Order: Psittaciformes) are renowned for their high bite force (BF) and morphological correlates thereof, including a highly mobile skull and two unique mandibular adductor muscles—m. pseudomasseter and m. ethmomandibularis, with the former being hypothesized to increase force output.
Ana Carolina L. Faillace, Arin Berger, Marcelo Ismar S. Santana, Adam Hartstone‐Rose   +3 more
wiley   +1 more source

The PASSERINE Public Key Encryption and Authentication Mechanism [PDF]

, 2010
PASSERINE is a lightweight public key encryption mechanism which is based on a hybrid, randomized variant of the Rabin public key encryption scheme. Its design is targeted for extremely low-resource applications such as wireless sensor networks, RFID ...
Markku-Juhani O. Saarinen
core   +1 more source