Marine Biologist here
true, full blown scientific assessments and multi-year analyses haven’t been done but that doesn’t mean that population control measures aren’t appropriate
these type studies weren’t done at the Galapagos Islands when I worked on the goat elimination program on Fernandina, or the wild dog elimination program on Isabela, or the rat elimination program on Floreana or any of the other species control programs that have been done, the evidence was clear without the studies that the programs were appropriate
it’s about balance, when one or more species are allowed to populate (as with Galapagos) or overpopulate as with the cormorants then there is a problem, in some cases if there are no natural predators then man becomes the control factor, to not control the resource would be irresponsible
when the problem is large enough it’s an acceptable practice to begin the control efforts and to use scientific methods to monitor the results
if anyone thinks that population surveys weren’t done before it was decided that the population should be reduced, or that population surveys weren’t done afterward, or that significant discussion and review of this subject wasn’t done, or that some guides, screaming lake users, eager hunters and a couple politicians caused the decision to be made hastily, they are incorrect
science is being applied, in this case there was no need to spend years and tons of money doing analyses, the issue was clear, and frankly it was clear for years before action was taken
be glad the decision was made to allow the hunting public to be part of the solution, rather than spending tons of money to hire contractors to have it done, that part of the hunting public that didn’t follow the rules lost the chance to enjoy the outdoor resources that we have
if anyone disagrees then they should insist that years of science should be done to absolutely quantify the impact of the coyote on the wildlife population and the habitat, during that time no coyote management would