نتایج جستجو برای: third of overwintering birds species 150 species
تعداد نتایج: 21219255 فیلتر نتایج به سال:
Home-range size is a key aspect of space-use, and variation in home-range structure may have profound consequences for the potential impact damage control strategies invasive species. However, knowledge on naturalized parrot species very limited. The aim this study was to quantify patterns according sex age monk parakeet Myiopsitta monachus, an Europe. Mean kernel 12.4 ± 1.22 ha (range 1.7–74.1...
Understanding relationships between infection and wildlife movement patterns is important for predicting pathogen spread, especially multispecies pathogens those that can spread to humans domestic animals, such as avian influenza viruses (AIVs). Although with low pathogenic AIVs generally considered asymptomatic in wild birds, prior work has shown influenza-infected birds occasionally delay mig...
I report for the first time the parasitization of overwintering gynes of Parapolybia species by the entomogenous nematode Sphaerularia sp. (Tylenchidae). The nematode was found in 42% of the overwintering wasp clusters examined but occurred in only 6% of individual wasps. The prevalence of parasitic nematodes among group hibernating hymenoptera is briefly discussed and compared with that in sol...
Background and Objectives: The heavy metals pollution in aquatic ecosystems especially mercury, always makes concern about health of aquatic organisms. So, the purposes of this study were determination of total mercury in different tissues of the three species of the most important water birds at north of Iran and comparison with world health standards.Materials and Methods: Generally, 51 birds...
detection and identification of malassezia species in domestic animals and aquatic birds by pcr-rflp
the present study aimed at detection and species-level identification of the malassezia yeasts in domestic animals and aquatic birds by polymerase chain reaction-restriction fragment length polymorphism (pcr-rflp). samples were collected using tape strips and swabs from 471 animals including 97 horses, 102 cattle, 105 sheep, 20 camels, 60 dogs, 30 cats, 1 hamster, 1 squirrel, 50 aquatic birds a...
West Nile Virus (WNV) is now endemic throughout North America, with annual recurrence dependent upon successful overwintering when cold temperatures drive mosquito vectors into inactivity and halt transmission. To investigate whether avian hosts may serve as an overwintering mechanism, groups of eight to ten House Sparrows were experimentally infected with a WN02 genotype of WNV and then held u...
a survey was conducted to study the parasitoid wasps associated with the pistachio gall aphids, forda hirsuta and slavum mordvilcovi on pistacia atlantica,in the southern iranian fars province during 2013. the overwintering galls were randomly collected and reared inside plastic jars at room temperature until the emergence of adults wasps . we identified the species macrocentrus oriens (van ach...
Background: Present study was carried out in north of Iran to investigate the concentration of mercury (Hg) as one of the most toxic metals in tissues of two species of birds. Methods: In this study, 15 birds from coot (Fulica atra) and 18 birds from cormorant (Phalacrocorax carbo) were hunted in Anzali and Gomishan wetlands. Data-analyses carried out using SPSS software version 17 licenced...
The European Union has made extensive biodiversity conservation efforts with the Habitats and Birds Directives and with the establishment of the Natura 2000 network of protected areas, one of the largest networks of conservation areas worldwide. We performed a gap analysis of the entire Natura 2000 system plus national protected areas and all terrestrial vertebrates (freshwater fish excluded). ...
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