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The equation for figure 2 is the differential of equation 1.1 (Verhulst's 1838 growth model): [12] = (equation 1.2) can be understood as the change in population (N) with respect to a change in time (t). Equation 1.2 is the usual way in which logistic growth is represented mathematically and has several important features.
Birth rate or recruitment. Recruitment means reaching a certain size or reproductive stage. With fisheries, recruitment usually refers to the age a fish can be caught and counted in nets. Growth rate. This measures the growth of individuals in size and length. This is important in fisheries where the population is often measured in terms of ...
Land equivalent ratio. The FAO defines land equivalent ratio (LER) as: [2] the ratio of the area under sole cropping to the area under intercropping needed to give equal amounts of yield at the same management level. It is the sum of the fractions of the intercropped yields divided by the sole-crop yields.
For example, say one wants to calculate with a calculator N 10, the population at the tenth generation, knowing N 0 the initial population and λ the finite rate of increase. With the last formula, the result is immediate by plugging t = 10, whether with the previous one it is necessary to know N 9, N 8, ..., N 2 until N 1. We can identify ...
Selection ratio refers to the ratio of the number of job positions to the number of job applicants and is used in the context of selection and recruitment. It is typically assumed to be a number between 0 and 1 where a number closer to zero implies that there are many applicants for any one position.
The ratio estimator is a statistical estimator for the ratio of means of two random variables. Ratio estimates are biased and corrections must be made when they are used in experimental or survey work. The ratio estimates are asymmetrical and symmetrical tests such as the t test should not be used to generate confidence intervals.
The slenderness ratio is an indicator of the specimen's resistance to bending and buckling, due to its length and cross section. If the slenderness ratio is less than the critical slenderness ratio, the column is considered to be a short column. In these cases, the Johnson parabola is more applicable than the Euler formula. [5]
Recruitment metrics are a standard set of measurements used to manage and improve the process of hiring candidates into an organization. Candidates can be existing employees within an organization, people entering the workforce for the first time or employees interested in job opportunities outside their current organization.