نتایج جستجو برای: such as lesser carnivores
تعداد نتایج: 5975702 فیلتر نتایج به سال:
leptospirosis is a zoonosis of worldwide distribution, caused by leptospira interrogans. it is a well known cause of bovine reproductive losses such as abortion, infertility, stillbirth and birth of weak calves. inthis research, the relationship between the seroprevalence rate of leptospira spp. infection and abortion inindustrial dairy farms of hamedan province, iran was studied. a total of 80...
Scavenging is a widespread behaviour and an important process influencing food webs and ecological communities. Large carnivores facilitate the movement of energy across trophic levels through the scavenging and decomposition of their killed prey, but competition with large carnivores is also likely to constrain acquisition of carrion by scavengers. We used an experimental approach based on mot...
We tested the competing hypotheses that (1) nitrogen discrimination in mammals and birds increases with dietary nitrogen concentration or decreasing C:N ratios and, therefore, discrimination will increase with trophic level as carnivores ingest more protein than herbivores and omnivores or (2) nitrogen discrimination increases as dietary protein quality decreases and, therefore, discrimination ...
identification of spatial-temporal anomalies sea level pressure in iran was the main aim in this research. for this purpose six hourly data used from the to eastern longitude and to northern latitude. in this location, there are 825 pixels to geographical degree. therefore, database extent created. in this matrix, 825 are number of the pixels at that location and 90520 is number of six hourly s...
The study of myology is relevant for both functional understanding and distinguishing different species. The pine marten (Martes martes) is a small carnivore found in Europe and Western Asia and belongs to the Mustelidae family. For the purpose of this study, fresh a carcass which was found in the hunters' trap, was brought to the anatomy hall of veterinary faculty, for anatomical studies. Afte...
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