“…Males with egg masses and newly hatched larvae have been collected in freshwater reaches , whereas juveniles and adults have been recorded from fresh water to saline estuarine habitats (Berra et al 2007, Pusey and Kennard, unpublished data, DAC, unpublished data). Extensive research has been done on Nurseryfish reproductive biology and early life history (Berra and Neira 2003, Berra and Aday 2004), anatomy and histology (Berra and Wedd 2001, Berra and Humphrey 2002, Carpenter et al 2004, genetics (Ezaz et al 2007, Sommer et al 2011, disease (Humphrey and Berra 2006), age and growth (Berra and Aday 2004), and diet (Berra and Wedd 2001), but almost nothing is known of the species' movements. We addressed this knowledge gap by analyzing 87 Sr/ 86 Sr in the otoliths of Nurseryfish from a tropical river/estuary system in northern Australia to examine their movements and assess the potential significance of movement by Nurseryfish as a mechanism for transporting energy and nutrients across salinity gradients.…”