Business Green: Offshore wind farm developers implicated in a mysterious spate of seal deaths have vigorously denied allegations their construction vessels could be to blame. Scientists investigating the killings believe the deaths were caused by a vessel with a ducted propeller that has caused “corkscrew-style” mutilations on the seals’ bodies. Callan Duck, a senior research scientist at St Andrews University Seal Mammal Research Unit, told BusinessGreen.com that vessels operating between …