Sometimes it’s pink, sometimes greeny-brown. But whatever the colour, whale dung could be the unlikely catalyst for ending whaling. The role of whale faeces in regenerating fish stocks will occupy centre-stage this week and next at the annual meeting of the International Whaling Commission (IWC) in Portoroz, Slovenia. For the first time in the IWC’s 70-year history, delegates attending from member countries will be invited to acknowledge growing evidence that whales don’t decrease fish numbers…