Results 11 to 20 of about 770,892 (320)

Color Flow Doppler Echocardiography in Healthy Racing Pigeons (Columba livia f. domestica) and the Evidence of Physiological Blood Flow Vortex Formations

Veterinary Sciences, 2020
In avian medicine, Doppler sonographic techniques are used to visualize and estimate blood flow in the heart. In the literature there is a lack of standardized studies of the use of color Doppler flow on healthy avian species.
Marko Legler, Lajos Koy, Norbert Kummerfeld, Michael Fehr   +3 more
doaj   +1 more source

Age‐associated variation in the gut microbiota of chinstrap penguins (Pygoscelis antarctica) reveals differences in food metabolism

MicrobiologyOpen, 2021
Age is known to affect the gut microbiota in various animals; however, this relationship is poorly understood in seabirds. We investigated the temporal succession of gut microbiota in captive chinstrap penguins of different ages using high‐throughput ...
Jiashen Tian, Jing Du, Shengjiu Zhang, Yanqiu Li, Xianggang Gao, Jiabo Han, Zhichuang Lu   +6 more
doaj   +1 more source

Intrapopulation differences in polar bear movement and step selection patterns

Movement Ecology, 2022
Background The spatial ecology of individuals often varies within a population or species. Identifying how individuals in different classes interact with their environment can lead to a better understanding of population responses to human activities and
Ryan R. Wilson, Michelle St. Martin, Eric V. Regehr, Karyn D. Rode   +3 more
doaj   +1 more source

Hunting by the Stroke: How Foraging Drives Diving Behavior and Locomotion of East-Greenland Narwhals (Monodon monoceros)

Frontiers in Marine Science, 2021
Deep diving air-breathing species by necessity must balance submergence time and level of exercise during breath-holding: a low activity level preserves oxygen stores and allows longer duration submergence whereas high activity levels consume oxygen ...
Outi M. Tervo, Susanne Ditlevsen, Manh C. Ngô, Nynne H. Nielsen, Susanna B. Blackwell, Terrie M. Williams, Mads Peter Heide-Jørgensen   +6 more
doaj   +1 more source

Distribution of microbiota across different intestinal tract segments of a stranded dwarf minke whale, Balaenoptera acutorostrata

MicrobiologyOpen, 2020
Marine mammals are an important part of ocean ecosystems, of which, whales play a vital role in the marine food chain. In this study, the mucosa and contents from different intestinal tract segments (ITSs) of a stranded dwarf minke whale (Balaenoptera ...
Jiashen Tian, Jing Du, Zhichuang Lu, Jiabo Han, Zhen Wang, Duohui Li, Xiaoyan Guan, Zhaohui Wang   +7 more
doaj   +1 more source

Application of Felid Hair for Non-Invasive Tracking of Animal Reproductive Status and Adrenal Activity

Animals, 2022
Hair can be a useful matrix to examine the hormonal status of an animal, although it is difficult to correlate the results to a specific time point. The aim of this study was to evaluate seasonal changes in cortisol and testosterone levels in the hair of
Sergey V. Naidenko, Galina S. Alekseeva, Polina S. Klyuchnikova, Mariya N. Erofeeva   +3 more
doaj   +1 more source

Evolution of Mammals and Their Gut Microbes

Science, 2008
Mammals are metagenomic in that they are composed of not only their own gene complements but also those of all of their associated microbes. To understand the coevolution of the mammals and their indigenous microbial communities, we conducted a network ...
R. Ley, M. Hamady, C. Lozupone, C. Lozupone, P. Turnbaugh, R. R. Ramey, J. Bircher, M. Schlegel, Tammy A. Tucker, M. Schrenzel, R. Knight, J. Gordon   +11 more
semanticscholar   +1 more source

Health Status and Stress in Different Categories of Racing Pigeons

Animals, 2021
The influence of different stress parameters in racing pigeon flocks, such as the presence of diseases and environmental conditions at the time of the races, were described.
Marjan Kastelic, Igor Pšeničnik, Gordana Gregurić Gračner, Nina Čebulj Kadunc, Renata Lindtner Knific, Brigita Slavec, Uroš Krapež, Aleksandra Vergles Rataj, Olga Zorman Rojs, Barbara Pulko, Maša Rajšp, Nina Mlakar Hrženjak, Alenka Dovč   +12 more
doaj   +1 more source

Phenotypic continuum of NFU1‐related disorders

Annals of Clinical and Translational Neurology, Volume 9, Issue 12, Page 2025-2035, December 2022., 2022
Abstract Bi‐allelic variants in Iron–Sulfur Cluster Scaffold (NFU1) have previously been associated with multiple mitochondrial dysfunctions syndrome 1 (MMDS1) characterized by early‐onset rapidly fatal leukoencephalopathy. We report 19 affected individuals from 10 independent families with ultra‐rare bi‐allelic NFU1 missense variants associated with a
Rauan Kaiyrzhanov, Maha S. Zaki, Tracy Lau, Sambuddha Sen, Reza Azizimalamiri, Mina Zamani, Gözde Yeşil Sayin, Taru Hilander, Stephanie Efthymiou, Viorica Chelban, Ruth Brown, Kyle Thompson, Maria Irene Scarano, Jaya Ganesh, Kairgali Koneev, Ismail Musab Gülaçar, Richard Person, Dinara Sadykova, Yerdan Maidyrov, Tahereh Seifi, Aizhan Zadagali, Geneviève Bernard, Katrina Allis, Houda Zghal Elloumi, Amanda Lindy, Ehsan Taghiabadi, Sumit Verma, Rachel Logan, Brian Kirmse, Renkui Bai, Shaimaa M. Khalaf, Mohamed S. Abdel‐Hamid, Alireza Sedaghat, Gholamreza Shariati, Mahmoud Issa, Jawaher Zeighami, Hasnaa M. Elbendary, Garry Brown, Robert W. Taylor, Hamid Galehdari, Joseph J. Gleeson, Christopher J. Carroll, James A. Cowan, Andres Moreno‐De‐Luca, Henry Houlden, Reza Maroofian   +45 more
wiley   +1 more source

Evolutionary Model of Species Body Mass Diversification [PDF]

Phys. Rev. Lett. 102, 038103 (2009), 2008
We present a quantitative model for the biological evolution of species body masses within large groups of related species, e.g., terrestrial mammals, in which body mass M evolves according to branching (speciation), multiplicative diffusion, and an extinction probability that increases logarithmically with mass.
arxiv   +1 more source