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General Category => News Views & Press Releases => Topic started by: Editor on February 18, 2011, 12:05:08 AM

Title: Another year … and another fish barrier.
Post by: Editor on February 18, 2011, 12:05:08 AM

Another year … and another fish barrier.

This fish barrier was found near Mogo on the NSW south coast. I&I NSW staff had previously been told of a 'weir' on Jeremadra Creek and what they found was a significant fish passage barrier in the Tomaga catchment.

I&I NSW are now investigating options for restoring fish passage through the weir.

Photo: Trevor Daly

Source: NSW Fisheries

Title: Re: Another year … and another fish barrier.
Post by: Binder on February 18, 2011, 04:52:06 AM

hardly looks like much of a barrier.

Title: Re: Another year … and another fish barrier.
Post by: drjfly on February 18, 2011, 07:01:31 AM

You would be surprised on what can be a significant barrier. When I get time later i'll expand, but have to get to work.


Regards
Darren

Title: Re: Another year … and another fish barrier.
Post by: Pilly on February 18, 2011, 10:21:50 PM

Who put it there?
Blow it up I reckon  :)

Cheers
Pilly

Title: Re: Another year … and another fish barrier.
Post by: beau on February 20, 2011, 07:00:06 PM

mini excavatoar and a afew hours work and its GONE

Title: Re: Another year … and another fish barrier.
Post by: Binder on February 20, 2011, 07:47:03 PM

maybe its the photo, but it just looks like an access track to me, no drilling or other exploration work been going on in the area?

Title: Re: Another year … and another fish barrier.
Post by: drjfly on February 20, 2011, 07:56:02 PM

Have spoken to Fitzy and I will put together a short presentation on fish passage and get it up on the site as soon as possible.


A barrier to fish migration can take a range of forms being height, velocity, chemical, weed choke, light, turbulence etc etc. In this case above it is a height barrier. A drop of 40mm can stop juvenile natives who might only be 10mm long. Hopefully when I get the presentation up it will explain things a lot further.

Regards
Darren