WFSC 403 6th Edition Lecture 10 Outline of Last Lecture I Theory Population Growth a Summary II Logistic Growth a Lab b Field c Rejection d Whooping Cranes III More Realistic Models a Theta logistic b Time lag c Stochastic d Matrix Outline of Current Lecture I Finish Chapter 9 a More Realistic Models Matrix b Essay Good Model Page 157 c r intrinsic realistic Page 147 II Start Chapter 10 Competition a Basic Concepts b Theory Current Lecture Matrix o Predicts age structure o F2 is fecundity of second generation Per capita birth rate x number of female x P values are analogous l x one age class to next age class o Another form of the matrix is the type with stage structures Larvae pupae etc Why do we need this o Long life animals animals that go through stages o Long life fish Start very small and then old enough large enough to catch These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute Deposit eggs big enough to catch first reproduction time lags Useful in management Essay page 157 o Can we predict the future Nope but can guess with models Age theta logistic matrix stochastic logistic models o Pick which kind depending on what we know o Models are good but depending on what we know we could also mislead ourselves Working with data page 147 o dN dt rN Intrinsic rate increase o dN dtN r Realized rate Values are the same if exponential o dN dt rN k N k o dN dtN r k N k Logistic no the same All we did was move the N Chapter 10 o What are some concepts with interspecies competition Predation parasitism herbivory o What is the functional difference between herbivory and predation Predation is the population is affected or part of the population dies a critter is removed Herbivory has no real affect on population Cow eats grass grass will grow back while coyote eats a rabbit the rabbit will not grow back o Would you expect to find two closely related species in the same environment Gauses hypothesis Competition exclusion principle Two similar species can t exist in the same community o Why not No place to hide one of two species will be the superior competitor o Resource competition vs interference competition Suppose we all went to Double Dave s the pizza comes out and we all scramble to get to it All of the pizzas will be eaten and all of our resources will be gone Resource competition Suppose someone at Double Dave s had a handgun and threatened to shoot those who went for the pizza Interference o Fundamental niche vs Realized niche Fundamental Place what is used if there was no competition ideal Realized Where how occupy in presence of competition
View Full Document
Unlocking...