Results 51 to 60 of about 4,485 (147)

Ancient DNA Reveals Late Pleistocene Existence of Ostriches in Indian Sub-Continent.

PLoS ONE, 2017
Ancient DNA (aDNA) analysis of extinct ratite species is of considerable interest as it provides important insights into their origin, evolution, paleogeographical distribution and vicariant speciation in congruence with continental drift theory. In this
Sonal Jain, Niraj Rai, Giriraj Kumar, Parul Aggarwal Pruthi, Kumarasamy Thangaraj, Sunil Bajpai, Vikas Pruthi   +6 more
doaj   +1 more source

Conservation Genetics of the Reintroduced Giant Tortoises (Aldabrachelys gigantea) in Madagascar

Ecology and Evolution, Volume 15, Issue 9, September 2025.
The Aldabra giant tortoise is the only surviving lineage of Malagasy megafauna, eradicated by human activities over the last millennium. In 2018, the first rewilding project was launched in the Anjajavy Reserve (NW Madagascar), using 12 founder individuals of unknown origin.
Guillaume Besnard, Alexandre Barutel, Rianja Rakotoarivony, Natacha Nikolic, Jonia Rasolofoniaina, F. Gözde Çilingir, Xenia Wietlisbach, Annabelle Constance, Jean‐Baptiste Ferdy, Miguel Pedrono   +9 more
wiley   +1 more source

Metabolismo oxidativo de heterófilos de avestruzes jovens Oxidative metabolism by heterophils from young ostriches

Ciência Rural, 2009
Foi avaliada a hipótese que, à semelhança dos neutrófilos de mamíferos, a produção de superóxido pelos heterófilos de avestruzes está associada com a maturidade funcional dessas células. Foram utilizados 20 avestruzes de ambos os sexos, divididos em dois
Silvia Cellone Trevelin, Tatiana de Sousa Barbosa, Valéria Maria Savoya da Silva, Paulo César Ciarlini   +3 more
doaj  

The complete mitochondrial genome of Lebiasina astrigata (Characiformes: Lebiasinida) and phylogenetic studies of Characiformes

Mitochondrial DNA. Part B. Resources, 2019
In the present study, the complete mitochondrial DNA sequence of was determined for the first time. The mitochondrial genome of Lebiasina astrigata is a circular molecule of 16,899 bp in size and contains 13 protein-coding genes, 2 rRNA genes, 22 tRNA ...
Fang Meng, Youkun Huang, Bingjian Liu, Kehua Zhu, Jianshe Zhang, Fei Jing, Liping Xia, Yifan Liu   +7 more
doaj   +1 more source

The evolution of giant flightless birds and novel phylogenetic relationships for extinct fowl (Aves, Galloanseres) [PDF]

Royal Society Open Science, 2017
The extinct dromornithids, gastornithids and phorusrhacids are among the most spectacular birds to have ever lived, with some giants exceeding 500 kg. The affinities and evolution of these and other related extinct birds remain contentious, with previous
Trevor H. Worthy, Federico J. Degrange, Warren D. Handley, Michael S. Y. Lee   +3 more
doaj   +1 more source

Zero-Shot Learning by Convex Combination of Semantic Embeddings [PDF]

, 2014
Several recent publications have proposed methods for mapping images into continuous semantic embedding spaces. In some cases the embedding space is trained jointly with the image transformation. In other cases the semantic embedding space is established
Bengio, Samy, Corrado, Greg S., Dean, Jeffrey, Frome, Andrea, Mikolov, Tomas, Norouzi, Mohammad, Shlens, Jonathon, Singer, Yoram   +7 more
core  

Bone Mineral Density of Willow Ptarmigan (Lagopus lagopus) as a Potential Taphonomic Factor in Skeletal Part Attrition

International Journal of Osteoarchaeology, Volume 35, Issue 5, Page 284-294, September/October 2025.
ABSTRACT Agents of taphonomy can bias skeletal parts and the frequency of bones in archaeological sites. An important factor to consider is the possible effect of bone density‐mediated attrition on archaeornithological assemblages. We scanned willow ptarmigan (Lagopus lagopus) specimens using a Lunar iDXA and an enCcore small animal body add‐on to ...
Frank J. Dirrigl Jr., Samuel R. Buchanan   +1 more
wiley   +1 more source

Children's acquisition of science terms: simple exposure is insufficient [PDF]

, 2007
The ability of school children (N = 233) to acquire new scientific vocabulary was examined. Children from two age groups (M = 4;8 and M = 6;5) were introduced to previously unknown words in an educational video.
Best, R, Braisby, N, Dockrell, Julie
core   +1 more source

The origins of neural spine elongation in iguanodontian dinosaurs and the osteology of a new sail‐back styracosternan (Dinosauria, Ornithischia) from the Lower Cretaceous Wealden Group of England

Papers in Palaeontology, Volume 11, Issue 4, July/August 2025.
Abstract The Wealden Group of southern England was deposited during the late Berriasian to early Aptian interval. It records a critical time in the development of iguanodontian dinosaur diversity, which increased from low levels during the Jurassic to higher levels in the Aptian and Albian. A new iguanodontian dinosaur, Istiorachis macarthurae gen.
Jeremy A. F. Lockwood, David M. Martill, Susannah C. R. Maidment   +2 more
wiley   +1 more source

The complete mitochondrial genome of North Island brown kiwi (Apteryx mantelli)

Mitochondrial DNA. Part B. Resources, 2017
Here, we report the complete mitochondrial genome sequence of North Island brown kiwi(Apteryx mantelli). The genome is found to be 16,694 bp in length and has a base composition of A (30.74%), G (13.46%), C (26.50%), and T (29.30%).
Jia Liu, Qing-xia Ding, Li-zhi Gao
doaj   +1 more source