Population dynamics

Tuesday, June 5, 2018 - 11:00am - 11:50am
Jim Cushing (University of Arizona)
Climate change (in particular, increased mean sea surface temperature) is correlated with several significant changes in behavior among colonial seabirds on Protection Island National Wildlife Refuge. These include increased egg cannibalism, changes in reproductive timing, and breeding season length. We’ve derived and analyzed a suite of proof-of-concept models to test various hypothesized mechanisms offered to explain these observed behavioral changes.
Friday, April 3, 2009 - 2:30pm - 3:00pm
Angela Gallegos (Occidental College)
The crocodilia have multiple interesting characteristics that
affect their population dynamics. They are among several
reptile species which exhibit temperature-dependent sex
determination (TSD) in which the temperature of egg
incubation determines the sex of the hatchlings. Their life
parameters, specifically birth and death rates, exhibit
strong age-dependence. We develop delay-differential equation
(DDE) models describing the evolution of a crocodilian
population. In using the delay formulation, we are able to
Monday, September 24, 2012 - 11:30am - 12:20pm
Edward Dancer (University of Sydney)
The system arises in the theory of condensates.(We also discuss a
related population system).
We obtain limiting equations (a scalar equation if we originally
had a system of two equations),discuss bounds for solutions which are
independent of the large parameter and discuss when we can use
properties of solutions of the limit system to obtain properties of
solutions of the original equations.
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