This thread made me remember a trip to Texas with Kenny Jarrett to deliver one of his rifles to a client in Brownsville. Harold Broughton taught about building rifles and we dropped by to look at the first button rifling machine he built. Without wandering too much I'll get to the point.
Harold took me out to check his cyanide sets for coyotes (he said the county paid him $20K a year to kill them). The first few coyotes were showing up here in SC then. Harold said this "once you have them, you will always have them". He went on to say that they move in to an area where there's plenty to eat and since that helps them to be healthy they have large litters until the food supply drops off. When the food supply drops off, litter size shrinks and therefore the population.
He then said something interesting - when hunting and trapping them reduces the population, the first to die are the stupid ones. That leaves a reduced population ready to have larger litters from the ones intelligent enough to survive.
But, I do believe the can change an ecosystem. The island I used to manage was once known for a massive diamondback rattle snake population. I think they were there because the island used to be covered with rabbits and cotton rats. Once the coyotes came, they pretty much obliterated the rabbits and greatly reduced the rats (temporarily). Now, you can go years without laying eyes on a diamondback. The coyotes took away the snakes primary food source.
Harold took me out to check his cyanide sets for coyotes (he said the county paid him $20K a year to kill them). The first few coyotes were showing up here in SC then. Harold said this "once you have them, you will always have them". He went on to say that they move in to an area where there's plenty to eat and since that helps them to be healthy they have large litters until the food supply drops off. When the food supply drops off, litter size shrinks and therefore the population.
He then said something interesting - when hunting and trapping them reduces the population, the first to die are the stupid ones. That leaves a reduced population ready to have larger litters from the ones intelligent enough to survive.
But, I do believe the can change an ecosystem. The island I used to manage was once known for a massive diamondback rattle snake population. I think they were there because the island used to be covered with rabbits and cotton rats. Once the coyotes came, they pretty much obliterated the rabbits and greatly reduced the rats (temporarily). Now, you can go years without laying eyes on a diamondback. The coyotes took away the snakes primary food source.