A study has found that noise from shipping in North Atlantic waters is affecting the feeding behavior of humpback whales.Researchers writing Wednesday in the Royal Society journal Biology Letters found that some whales in the Gulf of Maine changed their foraging behavior because of ship noise. Some decreased the speed with which they descended while others demonstrated fewer side rolls, a technique used by the whales for feeding on sand lance fish.Humpbacks migrate to the Caribbean to mate and give birth and return to New England waters in the spring to feed. They live up to 50 years but face a myriad of threats, from ship strikes to becoming entangled in fishing gear.A dead humpback washed up on a Rye beach in June.Get the WMUR app12967056