نتایج جستجو برای: old population
تعداد نتایج: 1024882 فیلتر نتایج به سال:
We investigated inbreeding depression and genetic load in a small (N(e) ∼ 100) population of the Glanville fritillary butterfly (Melitaea cinxia), which has been completely isolated on a small island [Pikku Tytärsaari (PT)] in the Baltic Sea for at least 75 y. As a reference, we studied conspecific populations from the well-studied metapopulation in the Åland Islands (ÅL), 400 km away. A large ...
Marine angiosperms, or seagrasses, continue to be a major focus of marine biologists because of their important ecological role in many coastal ecosystems. Seagrass population biology could benefit from a population genetic perspective because genetic data enable the extraction of useful demographic information such as isolation and gene flow between demes. Moreover, population genetic processe...
The population of England and Wales is becoming older. This poses an increasing demand for detailed data on the size an trends of the population at the oldes ages. Using the recently released Offic for National Statistics estimates of th population aged 90 and over in England and Wales, this article shows trends in the population of the oldest old and demographic causes of the rapid increase in...
1Department of Infectious Diseases, Singapore General Hospital 2Program in Emerging Infectious Diseases, Duke-NUS Graduate Medical School Address for Correspondence: Dr Jenny Low, Department of Infectious Diseases, Singapore General Hospital, Outram Road, Singapore 169608. Email: [email protected] Singapore has experienced yet another epidemic. With more than 13,000 cases reported as of mid ...
چکیده کنه تارتن دو لکه ای tetranychus urticae koch یکی از چندخوارترین آفات شناخته شده محصولات کشاورزی دنیا به حساب می آید. در این بررسی جمعیت تخم و مراحل فعال این کنه در شرایط آلودگی طبیعی و مصنوعی در برگ های 8 رقم لوبیا در سال 1392 در گلخانه و مزرعه تحقیقاتی دانشکده کشاورزی دانشگاه ارومیه موردمطالعه قرار گرفت. آزمایش به صورت طرح کاملاً تصادفی برای شرایط مزرعه در10 تکرار و برای شرایط گلخانه ای...
the article provides the analysis of death rates in road traffic accidents in kazakhstan from 2004 to 2010 and explores the use of sanitary aviation.data of fatalities caused by road traffic accidents were collected and analysed. descriptive and analytical methods of epidemiology and biomedical statistics were applied.totaly 27,003 people died as a result of road traffic accidents in this perio...
Eighty-eight percent of all 40-year-old male residents of four suburban municipalities of Copenhagen County were examined for the lead concentration in their blood and interviewed regarding job category and place of work. Of the 504 men, 482 were currently employed, 18 were unemployed, and 4 were pensioners. The total median blood lead level was 13 micrograms/100 ml (0.6 mumol/l). Men employed ...
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