Juvenile marron were obtained from the Aquaculture and Native
Fish Breeding Laboratory at the University ofWestern Australia
on 7 June 2006. Ten groups of 10 juvenile marron were marked
with standard length (0.25mm×1 mm) coded-wire tags (CWT)
using a Handheld Multishot Tag Injector (North-west Marine
Technologies, Shaw Island, WA, USA; http://www.nmt.us),
which were injected into the muscle tissue of the first or second
abdominal segment (following Isely and Eversole 1998; Kneib
and Huggler 2001). After injection, animals were scanned using
a Handheld Wand Detector (North-west Marine Technologies,
Shaw Island,WA, USA) to ensure the tags were inserted.