Fishery Bulletin 97(2), 1999 



deme sizes larger than their initial deme size, but 

 nearly 7% of the demes in sink habitats continued to 

 increase over the entire simulation (Fig. 4B). The fact 

 that deme sizes in some sink habitats do not decrease 



over the simulation period is a result of the time of 

 the simulation in relation to the rate of habitat deg- 

 radation in the sources. If the simulations had been 

 longer, all habitats would eventually have reached 



