50/500 or 100/1000 debate is not about the time frame - Reply to   Rosenfeld
  The Letter from Rosenfeld (2014, Biological Conservation) in response to Jamieson and Allendorf (2012, Trends in Ecology and Evolution) and Frankham et al. (2014, Biological Conservation) and related papers is misleading in places and requires clarification and correction. We provide those here. 
Richard Frankham, Corey J. A. Bradshaw, Barry W. Brook
q-bio.PE