NSW Department of Primary Industries (DPI) fisheries scientists are investigating ways to boost the survival rates of fish caught and then released by anglers.
Some guidelines designed to improve fish survival were recently developed for released line-caught snapper, silver trevally, mulloway, sand whiting, yellowfin bream and dusky flathead.
The research, costing more than $1.5 million and funded by NSW DPI and the Recreational Fishing Trust (using money from licence fees), is developing protocols designed to maximise fish survival via subtle changes to management practices.
Owing to bag limits, legal sizes and non-consumptive angling, between 30 and 50% of the total recreational catch is released each year in Australia. This amounts to more than 47 million fish being caught and released annually.
New research is now seeking to maximise the post-release survival of other commonly-caught species including luderick, sand mullet, garfish, tailor, Australian bass, Murray cod and golden perch.
NSW DPI scientists Matt Broadhurst and Paul Butcher have shown that mortality rates can be significantly improved through changed practices.
Key recommendations from an initial two-year project are that fishers should
Cut the line on fish that swallow hooks
“Simply cutting the line rather than attempting to remove hooks swallowed by mulloway and yellowfin bream increased their survival from 12 percent to more than 85 percent.
“Up to 76 percent of the released line-cut, gut-hooked yellowfin bream then shed their hooks over an average of three weeks”, he said.
Source:New South Wales Department of Primary Industries
Related biology news :
1. HIV vaccine trial breaks ground for future research
2. Prozac for future Plants on Mars
3. Purdues gold nanorods brighten future for medical imaging
4. Plants reveal a secret and bring researchers nearer a cleaner future
5. Report focuses on challenges to unlocking future promise of vaccines
6. Researchers make long DNA wires for future medical and electronic devices
7. New U. of Colorado at Boulder flu chip may help combat future epidemics, pandemics
8. Understanding the oceans microbes is key to the Earths future
9. Tastier tomatoes in the future?
10. Stable polymer nanotubes may have a biotech future
11. Food-crop yields in future greenhouse-gas conditions lower than expected