Ecological MethodologyEcological Methodology, Second Edition provides a balance of material on animal and plant populations, and teaches students of ecology how to design efficient tests in order to obtain maximum precision with minimal work. |
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Page 136
... random points to the nearest organism 2. From a random organism to its nearest neighbor There is , in principle , no problem with setting out random points in a large area , although it may be very time consuming and less easy to ...
... random points to the nearest organism 2. From a random organism to its nearest neighbor There is , in principle , no problem with setting out random points in a large area , although it may be very time consuming and less easy to ...
Page 144
... random point O is located within the study area , and the distance x is ... points like this . ( ○ ) Individual organisms . The standard error of Ñ ... random points is selected , often along a transect line , with the constraint that ...
... random point O is located within the study area , and the distance x is ... points like this . ( ○ ) Individual organisms . The standard error of Ñ ... random points is selected , often along a transect line , with the constraint that ...
Page 147
Charles J. Krebs. Measure these distances Random point Transect line Figure 4.6 Point - quarter method of density estimation . The area around each random point is subdivided into four 90 ° quadrants and the nearest organism to the random ...
Charles J. Krebs. Measure these distances Random point Transect line Figure 4.6 Point - quarter method of density estimation . The area around each random point is subdivided into four 90 ° quadrants and the nearest organism to the random ...
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abundance aphids Appendix assumptions bias calculations capture Caughley census zone Chapter chi-square clumped coefficient of variation confidence interval confidence limits defined density estimate distance ecological ecologists END-OF-FILE Enter equal catchability equation estimate of population estimate population example Figure finite population FORMAT 2X formula frequency distribution index of dispersion line transect mark-recapture marked animals method n₁ nearest neighbor negative binomial distribution niche breadth niche overlap normal distribution null hypothesis Number of animals Number of individuals number of quadrats number of samples number of species observed obtained parameters Petersen plot Poisson distribution population density population estimate problem Program proportion quadrat counts random points random sampling ratio READ recaptures regression sample size sample sizes sampling unit Schnabel Seber second sample simple random sampling spatial pattern standard error statistical statistical population stratum study area survival rate Table techniques Total number transformation variable variance