More than a nusance
Well when these dogfish start to expand into areas when and where they historically -- this is based on more than 40 years of experience (per my contact on LI) -- are not found in waters such as inshore Long Island, too early based on years passed, it means that the species is so plentiful that they are leaving their normal grounds and expanding outward.
We either need to introduce the dogfish to the seals as food - plovers too Tattoo Bob -- then maybe some of our problem will be taken care of naturally.
But yes, we cannot extinguish an entire species because they are nusance, but we can reduce their population to more balanced levels.
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