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## Fundamentals of Watershed Science

by: Serenity O'Kon

16

0

6

# Fundamentals of Watershed Science WATS 3700

Serenity O'Kon
Utah State University
GPA 3.8

Staff

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COURSE
PROF.
Staff
TYPE
Class Notes
PAGES
6
WORDS
KARMA
25 ?

## Popular in Wildlife and Fisheries Science

This 6 page Class Notes was uploaded by Serenity O'Kon on Wednesday October 28, 2015. The Class Notes belongs to WATS 3700 at Utah State University taught by Staff in Fall. Since its upload, it has received 16 views. For similar materials see /class/230390/wats-3700-utah-state-university in Wildlife and Fisheries Science at Utah State University.

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Date Created: 10/28/15
Fish Population Management Exponential Growth Logistic Growth Exponential Growth Difference Equation Nt1 Nt rNt r Birth rate Death rate Equation can be generalized Nt NO erT Differential Equation dNdt rN Example of Exponential Growth 250 200 7 150 7 100 7 y 90960095x 50 7 0 i i i i i 0 2 4 10 12 Abundance 6 8 Time Logistic Growth Difference Equation Nt1 Nt rKNtK Nt When does N increase When does N Decrease How to determine K Generalizes to Differential Equation dNdt r K NK N Example of Logistic Growth 33 km a ung at Population Sin and Gmwth nl39 Popuhlinn Size will Time as Dunmed by the ugmie Muck NI Nmax r is naguiva N EQUILIERIUM POPULATION SIZE max v r r 7 7 A A 77 N1 lt Nmax F4 r is positive THE NUMHER OF iNDIVIDUALS THE RATE OF CHANGE OF NUMBERS TIME IN YEARS Age Structured Population Dynamics Models Survival P Number of AdUItS Fecundity relationship Growth Survival P G W h Growth rate Survival P Survival probability Growth of Individuals LENGTH WEIGHT 2 mm 9 410 160 160 80 so 0 L05e WEIGHT 6 21 G 1 16 2 0e 0 3 2 I s 2 I a a 8 AG E y Figure 31Growth Increase In averaga length and welgm with age and upecmc growm mu G tho lnmmanaous ma ol growm per unit weghi1 expressed as percent pcr year 39 Rlcker I975 Woonon nu par 1990 LengthWeight 500 A 400 y0000012x2399 5 R2097 I 3007 6 3 2007 3 1007 0 100 200 300 400 Total Length nm Arctic Char Growth Growth rate Is density dependent lnllnanus Gmw l var znnz Inna mm mm m CharDensity mu 3 EU E 5 EU E w 2 In 1999 mun 2mm 2mm Inna mm mm Year Fecundity Usually depends on growth and size r mmmrmmmmw rimmsmmam mm i NuMEER or was n m n nsn LENGYH mm

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