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Unformatted text preview: 10/30/08 1 Discussion section next week (week of Nov 3) quiz covers October 30 lecture and all of Ch 53 come to section with your own CO 2 emissions calculated exams will be handed back in section next week exam grades will be on WebCT Friday (Oct 31) key will be posted on WebCT Monday (Nov 3) Lecture 8 Population Ecology Reading Ch. 53 How to measure density? count, sample and extrapolate, proxy, mark-recapture PLoS Oct. 28, 2008 Sound-emitting tags, listening devices juvenile Pacific salmon http://www.postcoml.org/page.php?section=community&page=PLoSembargo Who cares? Salmon – commercial species, decline, are dams responsible? Fish survival on Columbia R. (lots dams) = fish survival on Fraser R. (no dams) Why? II. DISPERSION - the pattern of spacing among individuals 10/30/08 2 Patterns of Dispersion random , uniform , or clumped spatial distributions Environmental and social factors influence the spacing of individuals in a population clumped dispersion – individuals aggregate in patches – influenced by resource availability and/or social interactions Social interactions Aggregation due to resources uniform dispersion...
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This note was uploaded on 03/31/2009 for the course BILD 3 taught by Professor Wills during the Winter '07 term at UCSD.
- Winter '07