WNFC activities

   
Recently I had the pleasure of helping Bruce and aqua culture students of Deakin University capture Estuary Perch for breeding purposes. On a warm night in September 1999 we headed for the Hopkins River at Warrnambool. Bruce laid out approximately one hundred and fifty meters of netting. The process used is to continually check the gill net and cut the fish free of the net ( yep, cut it free ). It's not surprising that Bruce goes through a few nets each year.

 

 

Once the fish are captured they are sedated and quickly transported to the make-shift outdoor laboratory on the river bank. There they are measured and weighed. Bruce then sexes the fish and then determined if the fish is fertile and ready to ovulate.

This process is described with illustrations on the
Native Fish Australia web site.
 

The details of all fish are recorded and this information is collated by the students and also sent to the DNRE.
Here a female fish is being stripped of her eggs. This is not stress full for the fish as she is sedated and would be expressing the eggs herself anyway with-in the next few hours. It should be noted that although many females were caught only a few were at this stage at the time of capture. Milt from the always ready male fish is mixed into this cocktail. 

 

 

Within a few minutes the fish fully recover and are released back into the river. If you are interested in helping or just observing contact Bruce for further information on the next outing.