منابع مشابه
Male fertility and sex ratio at birth in red deer.
Efforts to test sex ratio theory have focused mostly on females. However, when males possess traits that could enhance the reproductive success of sons, males would also benefit from the manipulation of the offspring sex ratio. We tested the prediction that more-fertile red deer males produce more sons. Our findings reveal that male fertility is positively related to the proportion of male offs...
متن کاملStudyCapture myopathy in red deer and wild goat
This syndrome is a shock-like hyper metabolic myopathy triggered in susceptible animals by stress. Capture myopathy (C.M.) is a commonly occurring condition in mammals following trapping and transportation. In this case 12 to 24 hours after transportation of red deer (Cevus elaphus) and wild goats (Capra ibex) clinical signs such as: muscular tremor, ataxia, recumbency, hyperthermia, tachyca...
متن کاملSex differences in weather sensitivity can cause habitat segregation: red deer as an example.
Sex differences in habitat use (habitat segregation) are widespread in sexually dimorphic ungulates. A possible cause is that males are more sensitive to weather than females, leading to sex differences in sheltering behaviour (the 'weather sensitivity hypothesis'). However, this hypothesis has never been tested. We considered the allometric rates of net energy gain during times of cold weather...
متن کاملVariation in harem size of red deer (Cervus elaphus L.): the effects of adult sex ratio and age-structure
The relationships among harem size, adult sex ratio (proportion of males> 5 years in the adult population, i.e. males > 5 years plus females > 2 years) and male age-structure of red deer Cervus elaphus was investigated in La Petite Pierre National Reserve (PPNR) in France. We tested whether: (1) increasing adult sex ratio leads to a decrease in harem size along with an increase in the number of...
متن کاملUnusual fibrils from the spirochete-like sex ratio organism.
Treatment of the spirochete-like Sex Ratio Organism with sodium deoxycholate results in the release of fibrils having a diameter of 3.6 nm and a period of 9 nm.
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ژورنال
عنوان ژورنال: Nature
سال: 1931
ISSN: 0028-0836,1476-4687
DOI: 10.1038/127094a0