2013 eXtension Virtual Aquaculture Workshop

The 2013 Virtual Aquaculture Workshop held on Nov. 12-15 covers a wide variety of freshwater and mariine aquaculture topics. Below you will find links to the recordings of the webinars, PDF copies of the presentations, and reference materials provided by the presenters. If you watch the recordings we ask that you please also participate in the survey. This helps us identify areas of improvment and lets us know what topics you are interested in for future webinars and eXtension

How often should I feed rainbow trout?

Feed frequency is based on fish size and how quickly fish consume feed. When small trout are started on feed, they should be fed small amounts at frequent intervals. As fish grow larger, the frequency of daily feedings deceases. A general rule of thumb is to feed 1% of body weight per feeding and to adjust feed frequency to obtain the desired feeding percentage to ensure all fish have access to feed. Thus, if fish are being fed 4% of …

How does one count trout eggs?

Several methods can be used to count eyed trout eggs. These include measuring volume, displacement, or weight; counting the number of eggs in a V-trough (Von Bayer method); or using electronic egg counters. Many trout farmers use the displacement method to estimate egg volume because it is relatively fast, simple, accurate, and does not require much equipment. The numbers of eggs per unit of volume can be estimated by counting 50 eggs into 25 ml of water in a 50-ml …

What is overflow rate?

Overflow rate is an empirical parameter describing the settling characteristics of solids in a specific wastewater. Overflow rate is defined as the volume of water flow per unit of time divided by the surface area of the settling basin. It is usually expressed as a velocity in feet per second.…