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Article
Bruktawit A. Mahamued, Auteur ; Paul F. Donald, Auteur ; Nigel J. Collar, Auteur ; Stuart J. Marsden, Auteur ; Paul Kariuki Ndang’ang’a, Auteur ; Mengistu Wondafrash, Auteur ; Yilma Dellelegn Abebe, Auteur ; James Bennett, Auteur ; Simon R. Wotton, Auteur ; Daniel Gornall, Auteur ; Huw Lloyd, AuteurLiben Lark Heteromirafra archeri is a ‘Critically Endangered’ species threatened by the loss and degradation of grassland at the Liben Plain, southern Ethiopia, one of only two known sites for the species. We use field data from nine visits betw[...]
Article
Nathaniel N. D. Annorbah, Auteur ; Nigel J. Collar, Auteur ; Stuart J. Marsden, AuteurThe heavily traded Grey Parrot Psittacus erithacus is believed to have undergone rapid population decline, yet there are almost no quantitative data on abundance changes over time from anywhere within its huge range. We reviewed the species’ his[...]
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Stuart J. Marsden, Auteur ; Kay Royle, AuteurEstimates of population density and abundance change (differences in density or encounter rates across land uses or time periods) form the cornerstone of much of our knowledge of species' responses to environmental conditions, extinction risks a[...]
Article
Stuart J. Marsden, Auteur ; Kay Royle, AuteurEstimates of population density and abundance change (differences in density or encounter rates across land uses or time periods) form the cornerstone of much of our knowledge of species\' responses to environmental conditions, extinction risks [...]
Article
David C. Lee, Auteur ; Stuart J. Marsden, AuteurAlthough point transect distance sampling methods have become widely used in surveys of forest birds, there has been no attempt to tailor field methods to maximize the accuracy of abundance estimates by minimizing the effects of violations of th[...]
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Matthew Geary, Auteur ; Alan H. Fielding, Auteur ; Stuart J. Marsden, AuteurWith increasing pressures on land for human use, it is important to identify the habitat requirements of key species, not just in terms of a correlation with a given habitat feature, but also the relationship between species presence and its cov[...]
Article
Stephen T. Buckland, Auteur ; Stuart J. Marsden, Auteur ; Rhys E. Green, AuteurIn many bird monitoring Surveys, no attempt is made to estimate bird densities or abundance. instead, counts of one form or another are made, and these are assumed to correlate with bird density. Unless complete Counts Oil Sample plots are feasi[...]
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David C. Lee, Auteur ; Stuart J. Marsden, AuteurAn important component of many conservation Studies is the assessment of bird-habitat relationships, but limited resources often lead to constraints on study design, quality and quantity of bird data, and restrict the number and types of habitat[...]
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Neil Aldrin D. Mallari, Auteur ; Nigel J. Collar, Auteur ; Philip J. K. Mcgowan, Auteur ; Stuart J. Marsden, AuteurAichi Target 11 of the Convention on Biological Diversity urges, inter alia, that nations protect at least 17 % of their land, and that protection is effective and targets areas of importance for biodiversity. Five years before reporting on Aich[...]
Article
Stuart J. Marsden, Auteur ; Craig T. Symes, Auteur ; Andrew L. Mack, AuteurIn comparison with other tropical forest land uses such as selective logging, little is known of the impacts on wildlife of the many forms of small-scale agriculture practised across the tropics. We present density estimates, derived using a poi[...]
