نتایج جستجو برای: endangered

تعداد نتایج: 14408  

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2007
Paulo R Guimarães Márcio Argollo de Menezes Robin W Baird David Lusseau Paulo Guimarães Sérgio F dos Reis

Emerging infectious diseases are among the main threats to conservation of biological diversity. A crucial task facing epidemiologists is to predict the vulnerability of populations of endangered animals to disease outbreaks. In this context, the network structure of social interactions within animal populations may affect disease spreading. However, endangered animal populations are often smal...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1994
S J O'Brien

The recognition of recent accelerated depletion of species as a consequence of human industrial development has spawned a wide interest in identifying threats to endangered species. In addition to ecological and demographic perils, it has become clear that small populations that narrowly survive demographic contraction may undergo close inbreeding, genetic drift, and loss of overall genomic var...

2014

Just 50 years ago, large herbivores like Banteng, Asian Elephant, and Eld’s Deer as well as predators like Indochinese tiger and leopard were so abundant in the Dry Forests of North and Northeast Cambodia that scientists compared this ecoregion to the savannas of East Africa. In the troubled decades that followed, however, habitat destruction and hunting greatly reduced animal numbers and diver...

2016
Neasa Ní Chiaráin Ailbhe Ní Chasaide

Speech-enabled dialogue systems developed within an iCALL framework offer a potentially powerful tool for dealing with the challenges of teaching/learning an endangered language where learners have limited access to native speaker models of the language and limited exposure to the language in a truly communicative setting. This paper explores the major potential of virtual conversational agent ...

Journal: Journal of Herbal Drugs 2011
Asghar Shahrokhi, Hamzeh Ali Shirmardi, Hossain Mohammadi Najaf-abadi Mahmood Talebi

Background & Aim: The present study was to identify the medicinal plant species and introduced as one of the key priority areas for conservation and determination of endangered species were done. Experimental: The method of plant collection in this region was classical method of regional plant taxonomic studies. Collected plants were recognized and determined families, genera and species of th...

Journal: Journal of Herbal Drugs 2011
Asghar Shahrokhi, Hamzeh Ali Shirmardi, Hossain Mohammadi Najaf-abadi Mahmood Talebi

Background & Aim: The present study was to identify the medicinal plant species and introduced as one of the key priority areas for conservation and determination of endangered species were done. Experimental: The method of plant collection in this region was classical method of regional plant taxonomic studies. Collected plants were recognized and determined families, genera and species of th...

2004
Geoff A. Fairburn Kenneth F.D. Hughey Ross Cullen

Expenditure on endangered species management is increasing greatly, on a global basis. Managers need tools to evaluate the performance of endangered species programmes because there will always be more demand for resources than there are available. Cost Effectiveness Analysis (CEA) is used here to evaluate the performance of the kokako (Callaeas cinerea) recovery programme. This species is bein...

2015
Mohamed Sageer A. T. Francis

The damage rate of endangered documents is very high by many ways. Such documents are usually not confined to the limited boundaries of the conventional library system, instead, that are scattered around and become the part of private collections, institutional collections and also official archives. When it becomes the part of a private collection, the possibility of damage is very high. Steps...

2017
Jeffrey A. Michael JEFFREY A. MICHAEL

While intended to increase the habitat available to endangered species, the restrictions of the Endangered Species Act (ESA) increase the costs of harboring an endangered species to private landowners and create incentives for private landowners to reduce habitat. This paper illustrates the incentive for habitat destruction with a simple model of private land use under the ESA, and uses it to p...

2008
Daniel Bruhn

China is a country with a deep history, vast territory, a burgeoning population (1.3 billion and counting) and, consequently, a multitude of languages spoken within its borders. Of the over 200 languages spoken by the 105 million non-Han minorities in China, at least 85 are considered to be endangered (Bradley 2005). These include languages of the Tibeto-Burman, Mon-Khmer, TaiKadai, Hmong-Mien,...

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