منابع مشابه
Causes of colony mortality in bumblebees
Despite considerable interest in bumblebees and their conservation, few data are available on basic life-history parameters such as rates of nest predation and the proportion of wild nests that survive to reproduction. Here, we use a combination of data collected by volunteers and our own direct observations which together describe the fate of 908 bumblebee nests in the UK between 2008 and 2013...
متن کاملsecuritization of mortality risks in life annuities
insurers have in the past few decades faced longevity risks - the risk that annuitants survive more than expected - and therefore need a new approach to manage this new risk. in this dissertation we survey methods that hedge longevity risks. these methods use securitization to manage risk, so using modern financial and insurance pricing models, especially wang transform and actuarial concepts, ...
15 صفحه اولCauses of rarity in bumblebees
Many bumblebee (Bombus) species are thought to have declined in abundance in the last 50 years, while a small number of species remain abundant. Here we examine which factors render some British bumblebee species more susceptible to environmental change than others. We present forage data on workers of 15 bumblebee species gathered from 172 one hour searches conducted at sites in southern UK, t...
متن کاملCAUSES OF MORTALITY IN CARDIAC SURGERY REOPERATIONS
From March 1990 to May 1993,309 patients underwent redo cardiac surgery operation at the Shahid Rajai Heart Hospital in Tehran. Early mortality rates in these patients showed a significant increase in comparison to patients undergoing open heart surgery for the first time. Late mortality (at least one month after surgery) in the patients was slightly increased also but less than early morta...
متن کاملCauses of Maternal Mortality in Iran: A Systematic Review
Background Maternal death is a key qualitative reliable index of a nation’s economic development. The present research aims to investigate causes of maternal mortality in Iran. Materials and Methods A systematic review of the following databases led us to find the target articles: Medline (via PubMed), Science Direct, CINAHL, CINAHL (EBSCO), Scopus, Web of Science, SID, ISC, Magiran, and Goog...
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ژورنال
عنوان ژورنال: Animal Conservation
سال: 2017
ISSN: 1367-9430
DOI: 10.1111/acv.12363