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Quantitative methods are needed in conservation biology more than ever as an increasing number of threatened species find their way onto international and national "red lists. " Objective evaluation of population decline and extinction probability are required for sound decision making. Yet, as our colleague Selina Heppell points out, population viability analysis and other forms of formal risk assessment are underused in policy formation because of data uncertainty and a lack of standardized methodologies and unambiguous criteria (i. e. , "rules of thumb"). Models used in conservation biology range from those that are purely heuristic to some that are highly predictive. Model selection should be dependent on the questions being asked and the data that are available. We need to develop a toolbox of quantitative methods that can help scientists and managers with a wide range of systems and that are subject to varying levels of data uncertainty and environmental variability. The methods outlined in the following chapters represent many of the tools needed to fill that toolbox. When used in conjunction with adaptive management, they should provide information for improved monitoring, risk assessment, and evaluation of management alternatives. The first two chapters describe the application of methods for detecting trends and extinctions from sighting data. Presence/absence data are used in general linear and additive models in Chapters 3 and 4 to predict the extinction proneness of birds and to build habitat models for plants.

He grew up in a small town in New England in the 1950's, watching lassie, going to church, getting straight A's at school, a scholar destined for success. But he already had a secret, and his public life with family and friends was already a constant round of ventriloquism as he played the joker and pretended to be the same as everyone else. For Paul Monette was gay. BECOMING A MAN is about growing up gay, and about the tyranny and self denial of the closet - one man's struggle, for half his life, to come out. From the white-bread 1950's through the rebellious 1960's to the self-creating 1970's and beyond, it forms a passionately honest and unsparing account of the tortures of living a lie, a naked protrait of one man's fight for freedom in a time of ignorance and bigotry. At the beginning of his junior year at a boys' boarding school, 16-year-old Alex is devastated when he fails to save a drowning friend. When questioned, Alex and his friend Glenn, who was also at the river, begin weaving their web of lies. Plagued by guilt, Alex takes refuge in the library, telling his tale in a journal he hides behind "Moby-Dick." Caught in the web with Alex and Family Maps of Madison County, Arkansas free download pdf Glenn is their English teacher, Miss Dovecott, fresh out of Princeton, who suspects there's more to what happened at the river when she perceives guilt in Alex's writing for class. She also sees poetic talent in Alex, which she encourages. As Alex responds to her attention, he discovers his true voice, one that goes against the boarding school bravado that Glenn embraces. When Glenn becomes convinced that Miss Dovecott is out to get them, Alex must choose between them. "From the Hardcover edition."

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Author: Scott Ferson,Mark Burgman
Number of Pages: 322 pages
Published Date: 01 Jul 2002
Publisher: Springer-Verlag New York Inc.
Publication Country: New York, NY, United States
Language: English
ISBN: 9780387954868
Download Link: Click Here
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