There are a few things that you need to consider when creating a work. Under the Australian Copyright Act 1968, it is not a requirement for works to be registered. They do however recommend that a notice is published in the work as follows:
"This work is copyright. Apart from any use permitted under the Copyright Act 1968, no part may be reproduced by any process, nor may any other exclusive right be exercised, without the permission of (name and address of copyright owner and the year in which the work was made). "
(Source: Attorney-General's Department. (2005).)
If you are publishing as part of the JCU community, two policies are relevant, the University's Copyright Policy and the University's Intellectual Property Policy. On the issue of ownership the latter states:
"Subject to clauses 4.2 and 4.3, the University makes no claim to automatic ownership of copyright created by staff for the purposes of teaching, research or scholarship, nor to automatic ownership of copyright in creative and artistic works."
You may wish to consider publishing using a Creative Commons licence.
The Attorney-Generals Department more information on Australian Copyright law.
or the University Copyright Officer: