Originally Posted By: ewest
I am not saying the higher protein food did not contribute to improved growth but all fish do not need higher protein food. Some need it when young , some all the time and some not at all.


For example, trout start out on about 50% protein feed for the first few months of life. As adults they get by just fine with 42% protein feed.

I will try and find my notes on protein requirements.


Edit:
I didn't find much species specific requirements but here is an example.

Fry need 50% protein. At 6-8 weeks you can switch to 40% protein. Adults and juveniles will have a requirement of 30%. Just a guess, but I would have to say this is for catfish since thay don't need as much protein.

Last edited by Chris Steelman; 11/19/07 08:54 PM.