News & Updates
Fish Passage Remediation
Below is a link to a very interesting article posted by the NZ Dept of Conservation that discusses the importance of restoring fish passage to benefit all aquatic species.Enjoy. Click here for article
Natural Barriers
This is an important positive message about fish passage. We are seeing an increase in the use of the term "natural barrier", particularly when prioritizing remediation of man-made structures/barriers. As it happens, many species of fish have evolved to navigate what...
Amazing Climbing Koaro
This is a short video by Tim Olley showing larger bodied koaro (Galaxias brevipinnis) "climbing" up a natural feature. Larger bodied fish tend to use a burst swimming action unlike the juveniles that typically "flip-flop" further out at the...
Climbing Eels
This rare footage shows both small and larger eels trying to navigate a natural feature. You will see that larger bodied specimens are unable to utilise the wet margins or splash zones. Remediation techniques should offer a range of options to give migrating fish...
How Fish Swim – Video Showing How Fish Utilize Small Eddies And Boundary Layers
When designing new structures or considering remediation for existing ones, it is important to consider the swimming ability of the fish likely to pass through or over the structure. This short video shows that small or juvenile fish...
Saxton Creek
Tim Olley has shared his experiences and observations made while rectifying a failed fish pass in Nelson NZ. Failed fish pass. Click here to read a short but fascinating report describing how a failed fish-pass was successfully remediated. [Saxton creek lessons...