نتایج جستجو برای: آهو gazella subgutturosa
تعداد نتایج: 523 فیلتر نتایج به سال:
Individual specialization is widespread among wild populations. While its fitness consequences are central in predicting the ecological and evolutionary trajectories of populations, they remain poorly understood. Long-term individual foraging specializations occur in male Antarctic (Arctocephalus gazella) and Australian (A. pusillus doriferus) fur seals. Strong selective pressure is expected in...
Parasites are ubiquitous components of the environment that contribute to behavioural and life-history variation among hosts. Although it is well known that host behaviour can affect parasite infection risk and that parasites can alter host behaviour, the potential for dynamic feedback between these processes is poorly characterized. Using Grant's gazelle (Nanger granti) as a model, we tested f...
Although heterozygosity-fitness correlations (HFCs) are widely reported in the literature, most studies use too few markers to allow the proximate mechanisms to be convincingly resolved. Two competing hypotheses have been proposed: the general effect hypothesis, in which marker heterozygosity correlates with genome-wide heterozygosity and hence the inbreeding coefficient f, and the local effect...
زبان از عناصر بنیادین در داستان نویسی به شمار می رود. بسیاری از صاحب¬نظران معتقدند میان زبان و نوشتار زنان و زبان و نوشتار مردان تفاوت وجود دارد. در عصر حاضر که در سایة تفکرات فمنیستی، زنان مجال حضور و ورود به قلمرو زبان و ادبیات را پیدا کردند، قلم را ابزار انتقال مردانگی، و بیگانه با خود یافتند؛ لذا در بیان مقصود دچار مشکل شدند. از سوی دیگر تحولات ادبی و ظهور رمان و داستان اعم از کوتاه و بلند ...
African beetles Onthophagus gazella from both sexes were analyzed by electrophoresis for an investigation of esterase isozymes using alpha-naphthyl propionate and methylumbelliferyl propionate as substrates. Only one of the esterases (Est. 6) reacted with one of the substrates (alpha-naphthyl propionate). Six areas of activity were found, two of them being polymorphic (Est. 3 and Est. 4). For p...
Introduction: Computed tomography (CT) is an imaging technique with gives us an opportunity to review cross sections of the body in live animals. In veterinary medicine although CT is mostly used for diagnostic purposes in small animals, but in recent years CT also has been used as a non invasive modality in non clinical studies. Jebeer Gazelle (Gazella bennettii) is one of the species of the g...
During a pilot survey of the parasites of some artiodactylids in the Kalahari Gemsbok National Park a new species of Trichostrongylus Looss, 1905 was recovered from the small intestine of a steenbok, Raphicerus campestris (Thunberg, 1811), a gemsbok, Oryx gazella (Linnaeus, 1758), and a red hartebeest, Alcelaphus buselaphus (Pallas, 1766). The male spicules were 0,120-0,148 mm long and an ear-s...
انسانها ساختارِِ روانیِ پیچیدهای دارند و در موقعیتهای گوناگون و ارتباط با افرادِ متفاوت تغییرپذیرند. بنابراین، ارزیابی شخصیت افراد کار سادهای نیست که بتوان بر اساس آزمونهای متفاوت به نوع شخصیت هر فرد پی برد؛ اما روانشناسان برای شناخت نسبی هر شخصیت آزمونهایی مطرح کردهاند. تیپنمای «مایرز ـ بریگز» یکی از این روشهاست که به کمک آن میتوان به شناخت چهار بُعد شخصیتی انسان دست یافت. این چهار بُعد ...
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