نتایج جستجو برای: avian species
تعداد نتایج: 580174 فیلتر نتایج به سال:
Since Feb, 2013, more than 100 human beings had been infected with novel H7N9 avian influenza virus. As of May 2013, several H7N9 viruses had been found in retail live bird markets (LBMs) in Guangdong province of southern China where several human cases were confirmed later. However, the real avian influenza virus infection status especially H7N9 in Guangzhou remains unclear. Therefore, a cross...
Avian malaria is a worldwide mosquito-borne disease caused by Plasmodium parasites. These parasites occur in many avian species but primarily affect passerine birds that have not evolved with the parasite. Host pathogenicity, fitness, and population impacts are poorly understood. In contrast to continental species, introduced avian malaria poses a substantial threat to naive birds on Hawaii, th...
For viruses such as avian influenza, immunity within a host population can drive the emergence of new strains by selecting for viruses with novel antigens that avoid immune recognition. The accumulation of acquired immunity with age is hypothesized to affect how influenza viruses emerge and spread in species of different lifespans. Despite its importance for understanding the behaviour of avian...
Newcastle disease is highly pathogenic to poultry and many other avian species. However, the Newcastle disease virus (NDV) has also been reported from many non-avian species. The NDV fusion protein (F) is a major determinant of its pathogenicity and virulence. The functionalities of F gene have been explored for the development of vaccine and diagnostics against NDV. Although the F protein is w...
Brosbe, Edwin A. (Veterans Administration Hospital, Long Beach, Calif.), Paul T. Sugihara, and C. Richard Smith. Growth characteristics of Mycobacterium avium (avian) to group III nonphotochromogenic mycobacteria in HeLa cells. J. Bacteriol. 84:1282-1286. 1962.-The close relationship of Mycobacterium avium (avian) to group III nonphotochromogenic (Battey) strains of mycobacteria stimulated inte...
Testing visual ecology hypotheses in avian brood parasite-host systems: the role of UV-light perception and egg-nest contrast in foreign egg rejection by Zachary Aidala Adviser: Dr. Mark E. Hauber Color signals are highly important features of animal communication systems, particularly among birds, which possess exquisitely complex visual perception systems. Birds possess tetrachromatic vision,...
Mangrove habitats are under severe land use pressure throughout the world and Australia is no exception. Here we describe the heterogeneity of mangrove habitat and its relationship with mangrove bird diversity. We examined the role of mangrove habitat complexity in determining the richness of avian mangrove dependent species (MDS) and interior species, overall bird species richness and density....
BACKGROUND The evolutionary relationships of modern birds are among the most challenging to understand in systematic biology and have been debated for centuries. To address this challenge, we assembled or collected the genomes of 48 avian species spanning most orders of birds, including all Neognathae and two of the five Palaeognathae orders, and used the genomes to construct a genome-scale avi...
Acid rock drainage (ARD) impacts species composition in mountain streams. The potential impact for riparian birds experiencing elevated metal uptake by consumption of benthic invertebrates is concerning but not well studied. We investigated the influence and rare earth element (REE) content on presence breeding an ARD-impacted watershed Colorado, USA, where tree swallows nest boxes had previous...
Avian diversity has often been studied in agricultural habitats, but ornithological aspect of cattle sheds never studied. This exploratory study was conducted with the objective studying potential for sustaining avian abundance and rice dominated areas. The done Rice Field Ecosystem (System I) Cattle Shed II) during 2019 2020 monsoon crop season from selected villages, namely, Dangon, Pakhowal ...
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