SOME MIGRATORY BIRDS WINTERING IN SOUTH DAKOTA
نویسندگان
چکیده
منابع مشابه
Predicting Occupancy of Wintering Migratory Birds: Is Microhabitat Information Necessary?
Information regarding microhabitat, here defined as small-scale vegetation structure, is often useful in predicting use of habitat by birds. Quantifying microhabitat, however, is expensive and labor intensive compared to assessment of habitat at a larger scale, possibly from remotely sensed imagery. To assess the importance of microhabitat information in constructing predictive models of habita...
متن کاملClimatic patterns in the establishment of wintering areas by North American migratory birds
Long-distance migration in birds is relatively well studied in nature; however, one aspect of this phenomenon that remains poorly understood is the pattern of distribution presented by species during arrival to and establishment of wintering areas. Some studies suggest that the selection of areas in winter is somehow determined by climate, given its influence on both the distribution of bird sp...
متن کاملCross-seasonal patterns of avian influenza virus in breeding and wintering migratory birds: a flyway perspective.
The spread of avian influenza viruses (AIV) in nature is intrinsically linked with the movements of wild birds. Wild birds are the reservoirs for the virus and their migration may facilitate the circulation of AIV between breeding and wintering areas. This cycle of dispersal has become widely accepted; however, there are few AIV studies that present cross-seasonal information. A flyway perspect...
متن کاملSerological Monitoring of Avian Influenza in Migratory Birds of Iran
Although migratory waterfowl is well known to be a major reservoir for avian influenza virus (AIV), there are only few recently published reports about the seroprevalence of AIV in this group of birds. To investigate the AIV antibody status in migratory waterfowl of Iran, we collected 217 serum samples from 25 different species of waterfowl during 2003 and 2004. These serum samples were teste...
متن کاملLivestock Development In South Dakota
development in this state. Q & A agrees with Mistry that two major “push” factors that are making producers in his part of Europe look elsewhere are tough environmental laws and limited agricultural land that is costly and increasingly hard to find. “There’s no doubt that the environmental laws in northern Europe are a lot tighter than they are here,” says Van der Sluis. “It’s almost impossible...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: School Science and Mathematics
سال: 1906
ISSN: 0036-6803
DOI: 10.1111/j.1949-8594.1906.tb00946.x