Results 61 to 70 of about 1,108 (163)

Ancient DNA analysis of extinct animal and ice core samples [PDF]

, 2017
第8回極域科学シンポジウム/特別セッション：[S] 先端的技術で切り開く極域科学 －極域観測における計測、分析、解析の最前線－12月7日（木）国立極地研究所 2階大会議室The Eighth Symposium on Polar Science/Special session: [S] Polar science developed by leading-edge technology - on the frontiers of measurement and analysis in polar ...
森 宙史, 瀬川 高弘, 秋好 歩美, 竹内 望, 米澤 隆弘, 長谷川 政美   +5 more
core   +1 more source

Reconstruction of gross avian genome structure, organization and evolution suggests that the chicken lineage most closely resembles the dinosaur avian ancestor. [PDF]

, 2014
BACKGROUND: The availability of multiple avian genome sequence assemblies greatly improves our ability to define overall genome organization and reconstruct evolutionary changes.
Backström, Niclas, Burt, David W, Ellegren, Hans, Farré, Marta, Fonseka, Gothami, Fowler, Katie E, Griffin, Darren K, Houde, Peter, Jarvis, Erich D, Larkin, Denis M, Lithgow, Pamela E, Matsuda, Yoichi, Nishida, Chizuko, O'Connor, Rebecca, Romanov, Michael N, Skinner, Benjamin M   +15 more
core   +8 more sources

Avian Lifespan Network Reveals Shared Mechanisms and New Key Players in Animal Longevity

Aging Cell, Volume 24, Issue 9, September 2025.
In this work, we found that birds with similar lifespans exhibit convergent evolution in specific genes, suggesting that shared evolutionary pressures shape the genetic basis of lifespan similarity across species. By investigating protein–protein interactions across genes evolving convergently in long‐ and short‐lived species, we identified a network ...
Mirko Martini, Giovanni Piccinini, Liliana Milani, Mariangela Iannello   +3 more
wiley   +1 more source

Whole-genome analyses resolve the phylogeny of flightless birds (Palaeognathae) in the presence of an empirical anomaly zone [PDF]

Systematic Biology, 2018
AbstractPalaeognathae represent one of the two basal lineages in modern birds, and comprise the volant (flighted) tinamous and the flightless ratites. Resolving palaeognath phylogenetic relationships has historically proved difficult, and short internal branches separating major palaeognath lineages in previous molecular phylogenies suggest that ...
Cloutier, Alison, Sackton, Timothy B., Grayson, Phil, Clamp, Michele, Baker, Allan J., Edwards, Scott V.   +5 more
openaire   +2 more sources

Evolution and phylogeny of birds - Taxonomic consequences [PDF]

, 2012
Nucleotidsequenzen von mitochondrialen und nucleären Markergenen eignen sich hervorragend, um die Phylogenie und Evolution der Vögel zu untersuchen. Eine kürzlich publizierte Analyse mit 19 Kerngenen (Hackett et al.
Wink, Michael
core  

What prevents Struthio camelus and Dromaius novaehollandiae (Palaeognathae) from choking? A novel anatomical mechanism in ratites, the linguo-laryngeal apparatus

Frontiers in Zoology, 2012
Background The avian glottis channels air from the oropharynx to the trachea and is situated on an elevated structure, the laryngeal mound. It is imperative that the glottis be protected and closed during swallowing, which in mammals is achieved by ...
Crole Martina R, Soley John T
doaj   +1 more source

Expression patterns of melanin‐related genes are linked to crypsis and conspicuousness in a pumpkin toadlet

Molecular Ecology, Volume 34, Issue 15, August 2025.
Abstract Colour signals play pivotal roles in different communication systems, and the evolution of these characters has been associated with behavioural ecology, integumentary production processes and perceptual mechanisms of the species involved. Here, we present the first insight into the molecular and histological basis of skin colour polymorphism ...
Juliane P. C. Monteiro, Heike Pröhl, Mariana L. Lyra, Andrés E. Brunetti, Eli C. de Nardin, Thais H. Condez, Célio F. B. Haddad, Ariel Rodríguez   +7 more
wiley   +1 more source

Characterization of Chicken Tumor Necrosis Factor-α, a Long Missed Cytokine in Birds

Frontiers in Immunology, 2018
Tumor necrosis factor-α (TNF-α) is a pleiotropic cytokine playing critical roles in host defense and acute and chronic inflammation. It has been described in fish, amphibians, and mammals but was considered to be absent in the avian genomes.
Franziska Rohde, Benjamin Schusser, Tomáš Hron, Helena Farkašová, Jiří Plachý, Sonja Härtle, Jiří Hejnar, Daniel Elleder, Bernd Kaspers   +8 more
doaj   +1 more source

Mechanism of Action of Secreted Newt Anterior Gradient Protein [PDF]

, 2016
Anterior gradient (AG) proteins have a thioredoxin fold and are targeted to the secretory pathway where they may act in the ER, as well as after secretion into the extracellular space.
Brockes, JP, Delgado, J-P, Driscoll, PC, Garza-Garcia, A, Gates, PB, Godwin, JW, Grassme, KS, Kumar, A   +7 more
core   +1 more source

A focus on females can improve science and conservation

Ibis, Volume 167, Issue 3, Page 819-827, July 2025.
As a field, ecology has historically misunderstood or overlooked female organisms, or assumed that they are ‘similar enough’ to males. The typical unit of study for ecology research stops at the species level, but that can be too coarse and can obscure important intraspecific differences.
Joanna X. Wu, Martha A. Harbison, Stephanie Beilke, Purbita Saha, Brooke L. Bateman   +4 more
wiley   +1 more source