Optimal feed content for bass - 04/18/14 06:47 PM
Not surprising, but I found a paper by one of D Willis' students to do a very good job evaluating feeds for LMB.
http://pubstorage.sdstate.edu/wfs/thesis/Csargo%20Isak%20J%202011%20MS.pdf
It's a 2011 MS thesis. He looked at fingerling feeds and then feeds for larger bass. The larger bass portion is on pgs 14-33 (still only 3.6" at start). He included only one Aquamax, and 3 others we don't seem to talk about.
They all run protein 49-61%, fat 16-20%. AQ400 is the cheapest/lb and BDG is 2x that. He cites some good literature in why high protein and lipids <20%. I was going to include several in the summary I've been working on, but this thesis does a nice job.
This was a 100 day experiment in indoor tanks and they were fed to satiation.
Survival, growth, and LCS (liver color scale) values were positively correlated with protein and P:E and negatively correlated with fat and carbohydrates, ... FCR were negatively correlated with protein and P:E and positively correlated with fat and carbohydrates
So, if you only care about conversion rate, high fat/low protein is the way to go. However, the other side of the coin is growth rate. Both growth by weight and length are best with high protein/low fat. Data and regression coefficients are in Tables 2-2 and 2-4 (pgs 32&33) if you want to see for yourself.
He concludes the best feed for intensive aquaculture is Richland Bass Fry Diet (61% protein/16% fat) and feed to satiation 3-4 times daily during daylight hours. Feed conversion was .79 kg feed/kg gain for RBF, and others were .95-1.05. The cost per kg gained was lowest for AQ400, but RBF was only 30% more. For outdoor / pond use, perhaps one chooses another feed.
http://pubstorage.sdstate.edu/wfs/thesis/Csargo%20Isak%20J%202011%20MS.pdf
It's a 2011 MS thesis. He looked at fingerling feeds and then feeds for larger bass. The larger bass portion is on pgs 14-33 (still only 3.6" at start). He included only one Aquamax, and 3 others we don't seem to talk about.
- Bio Oregon BioDiet Grower (BDG)
- Silver Cup Steelhead (SCS)
- Purina AquaMax Grower 400 (PAG)
- Richloam Bass Fry Diet 12 (RBF)
They all run protein 49-61%, fat 16-20%. AQ400 is the cheapest/lb and BDG is 2x that. He cites some good literature in why high protein and lipids <20%. I was going to include several in the summary I've been working on, but this thesis does a nice job.
This was a 100 day experiment in indoor tanks and they were fed to satiation.
Survival, growth, and LCS (liver color scale) values were positively correlated with protein and P:E and negatively correlated with fat and carbohydrates, ... FCR were negatively correlated with protein and P:E and positively correlated with fat and carbohydrates
So, if you only care about conversion rate, high fat/low protein is the way to go. However, the other side of the coin is growth rate. Both growth by weight and length are best with high protein/low fat. Data and regression coefficients are in Tables 2-2 and 2-4 (pgs 32&33) if you want to see for yourself.
He concludes the best feed for intensive aquaculture is Richland Bass Fry Diet (61% protein/16% fat) and feed to satiation 3-4 times daily during daylight hours. Feed conversion was .79 kg feed/kg gain for RBF, and others were .95-1.05. The cost per kg gained was lowest for AQ400, but RBF was only 30% more. For outdoor / pond use, perhaps one chooses another feed.