at the risk of annoying peeps by starting another shark thread,

i thought this is too interesting to have it mixed in with other stuff and get lost
meg posted this link in another thread , it regards to the shark tagging info they have so far been able to publish from the last few years of tagging

its a very intersting read if you have time

main conclusion below & it may help explain why the gov has pulled the pin on funding parts of the tagging program
hezzy

http://www.fish.wa.gov.au/Documents/research_reports/frr273.pdf

Conclusions
The Shark Monitoring Network project has successfully achieved its dual research and public safety goals. It has significantly improved the level of understanding of the movements of white sharks bronze whalers and tiger sharks in Western Australian waters and developed a new standard for deep-water acoustic receiver management. It has also provided hundreds of near real-time notifications of verified shark hazard events to enable pre-emptive public safety responses. Additionally, social media and interactive web-mapping have provided members of the public with a more reliable basis for understanding the likelihood of white sharks’ presence off some of the State’s most popular beaches. These originally-unanticipated functions have also addressed long-standing community requests for access to the latest scientific information about sharks’ local behaviour and movements.
The acoustic telemetry approaches evaluated in this study have clear limitations in identifying shark hazards, as do all other currently-available monitoring methods. The SMN VR4G receiver network has, however, realised detection rates that are at least equivalent to other surveillance methods employed in WA with the added benefits of 24h year-round operation and immediate verification of sharks’ species and sizes. Positive identification of shark hazards allows greater certainty in determining appropriate public safety responses and eliminates the risk of responding to false alarms.
Data collected during this study have revealed patterns in the occurrence and movements of white sharks that can inform public safety authorities and Government decision-makers about how encounter risks vary over time and by location. Given the results show that white sharks exhibit rapid, extensive and generally uncoordinated movements around the Western Australian coast, sharks’ movement ecology remains a significant impediment to accurately predicting when, where and why people might encounter this species. Although white sharks tend to be highly mobile and transient through waters that are usually too far offshore to pose a significant risk to most water users, at times, some may come close to shore for periods of a few hours to a few weeks and, in some cases, even for a few months. As these patterns are not consistent among years it is unlikely that a greater period of data collection will generate an overall predictive model. The continued use of tagged sharks as ‘proxies’ for determining wider risk levels may prove to be a valuable component of the WA Government’s overall shark hazard mitigation program.