Sentence:  This indicates that the present levels of genetic diversity in P. microdon are not unusually low, although the amount of diversity to be expected in <WSD>pristine</WSD> populations of coastal species of elasmobranch remains elusive because all populations investigated to date have suffered some degree of decline (e.g. Sandoval-Castillo et al. 2004, Keeney et al. 2005, Hoelzel et al. 2006, Stow et al. 2006, Lewallen et al. 2007). 
Meaning of the word marked with <WSD> tags:  Relating to sawfishes of the family Pristidae.