نتایج جستجو برای: bird

تعداد نتایج: 24284  

2016
Jaime L Stephens Eric C Dinger John D Alexander Sean R Mohren C John Ralph Daniel A Sarr

We examined avian community ecology in the Klamath Ecoregion and determined that individual bird species co-exist spatially to form 29 statistically distinguishable bird groups. We identified climate, geography, and vegetation metrics that are correlated with these 29 bird groups at three scales: Klamath Ecoregion, vegetation formation (agriculture, conifer, mixed conifer/hardwood, shrubland), ...

2018
Friederike Michel Dominik Fischer Martin Eiden Christine Fast Maximilian Reuschel Kerstin Müller Monika Rinder Sylvia Urbaniak Florian Brandes Rebekka Schwehn Renke Lühken Martin H Groschup Ute Ziegler

By systematically setting up a unique nation-wide wild bird surveillance network, we monitored migratory and resident birds for zoonotic arthropod-borne virus infections, such as the flaviviruses West Nile virus (WNV) and Usutu virus (USUV). More than 1900 wild bird blood samples, from 20 orders and 136 different bird species, were collected between 2014 and 2016. Samples were investigated by W...

Journal: :International journal of occupational medicine and environmental health 2011
Sylwia Swiderska-Kiełbik Anna Krakowiak Marta Wiszniewska Ewa Nowakowska-Świrta Jolanta Walusiak-Skorupa Konrad Sliwkiewicz Cezary Pałczyński

OBJECTIVES To evaluate the risk factors for the development of occupational allergy to birds among Polish zoo garden keepers. METHODS A total of 200 bird zookeepers employed in the Polish zoo gardens in KLódź, Warsaw, Gdańsk, Chorzów and Płock and exposed occupationally to bird allergens were examined using a questionnaire, skin prick tests (SPTs) to common allergens and bird allergens, spiro...

Journal: :Ecological applications : a publication of the Ecological Society of America 2007
Sarah E Pabian Margaret C Brittingham

Studies in Europe have reported negative effects of acid deposition on forest birds, and research in North America has identified links between forest bird abundance and rates of acid deposition. We examined the bird community in an acidified forest in central Pennsylvania (USA) and evaluated the effects of terrestrial lime application on birds. We used a before-after control-impact (BACI) stud...

Journal: :Anais da Academia Brasileira de Ciencias 2016
Mauricio N Godoi Edivaldo O DE Souza

Different vegetation types are distributed in mountains according to altitude, topography and soil. The composition and structure of bird communities in these areas can change in relation to the vegetation gradient, with particular communities occupying each habitat type. In this study we present the changes in composition, species richness and bird abundance over the gradient of forests, savan...

Journal: :IJCLCLP 2014
Wei-Ho Tsai Yu-Zhi Xue

Wild bird watching has become a popular leisure activity in recent years. Very often, people can see birds or hear their sounds, but have no idea what kind of bird species they are seeing. To help people learn to identify bird species from their sounds, we apply speech recognition techniques to build an automatic bird sound identification system. In this system, two acoustic cues are used for a...

2009
P. Jepson

The Indonesian pastime of keeping wild birds as pets is threatening the long-term survival of many songbird species on the islands of Java and Bali. Here we present the results of a large-scale household survey of bird-keeping in the six largest cites of Java and Bali that investigates: (1) the scale and conservation significance of bird-keeping and (2) the relative merits of regulatory versus ...

2003
M. NADKARNI

Epiphytes are a common component of neotropical forests, but their importance to birds at the community level and their role in contributing to tropical bird diversity has only rarely been considered. Literature accounts from 55 studies document 193 species of neotropical birds that take nectar, fruits, invertebrates, water, and nesting materials from epiphytes. To quantify the amounts and type...

Journal: :The Iraqi Journal of Agricultural science 2022

The study was conducted on 118 partridges (Alectoris graeca) chicks in order to find the effect of non-genetic factors and genetic evaluation live weight carcass this bird. results showed a highly significant superiority weights males over females most age stages (437.71 ± 4.40 vs 375.90 3.66 g/ bird at marketing age) daily gain (ADG) from one day (4.70 0.06 4.01 0.04 day/bird). breeding values...

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