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| Date: | Tue, 28 Jan 2003 11:51:36 +1100 |
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At 9:11 +1000 28/1/03, Sean McBride wrote:
>What is the major difference? Are they feeding them something that changes
>the fish oil composition. They are trying to start fish farming in the Bay
>here but getting a lot of opposition.
>
>Sean
Yup, they feed them wheat and corn pellets. This has a huge difference
on the n-3 to n-6 ratio. And on the overall quantity of fat.
Rainbow Trout Atl. salmon Coho salmon Chnnl catfish
Wild Farmed Wild Farmed Wild Farmed Wild Farmed
Total fats (g/100g) 3.46 5.4 6.34 10.85 5.93 7.67 2.82 7.59
Saturated fats 20.9% 28.8% 15.5% 20.1% 21.2% 23.7% 25.6% 23.3%
4:0 butyric - - - - - - - -
6:0 caproic - - - - - - - -
8:0 caprylic - - - - - - - -
10:0 capric - - - - - - - -
12:0 lauric 0.3% - - - - - - -
14:0 myristic 2.3% 3.5% 2.2% 4.5% 4.5% 3.7% 2.3% 1.3%
15:0 pentadecanoic - - - - - - - -
17:0 palmitic - - - - - - - -
16:0 margaric 12.2% 18.1% 10.0% 12.0% 12.7% 14.2% 15.7% 16.8%
18:0 stearic 4.0% 5.1% 3.3% 2.6% 3.5% 4.1% 5.3% 4.7%
20:0 arachidic - - - - - - - -
22:0 behenic - - - - - - - -
24:0 lignoceric - - - - - - - -
Monounsaturated fats 32.6% 28.5% 33.2% 35.6% 36.0% 43.4% 29.9% 47.2%
14:1 myristoleic - - - - - - - -
16:1 palmitoleic 5.9% 4.2% 4.0% 6.2% 8.5% 5.8% 6.2% 3.7%
18:1 oleic 17.7% 19.6% 21.3% 16.5% 20.3% 22.5% 21.1% 41.7%
20:1 gadoleic 3.2% 4.4% 3.5% 11.0% 4.2% 6.6% 0.7% 1.0%
22:1 erucic 4.0% - 4.4% - 2.5% 7.6% 0.3% 0.6%
Polyunsaturated fats 35.8% 33.4% 40.0% 36.2% 33.6% 24.3% 30.7% 20.7%
18:2 linoleic 6.9% 13.1% 2.7% 5.4% 3.5% 4.6% 3.6% 11.5%
18:3 linolenic 3.4% 1.1% 4.7% 0.9% 2.6% 1.0% 2.5% 1.3%
18:4 parinaric 1.9% 0.9% 1.3% 1.4% 2.0% 1.5% 0.5% 0.5%
20:4 arachidonic 3.2% 0.5% 4.2% 10.6% 2.2% 1.2% 5.3% 1.1%
20:5 timnodonic 4.8% 4.8% 5.1% 5.7% 7.2% 5.0% 4.6% 0.9%
22:5 clupanodonic 3.1% - 4.5% - 3.9% - 3.5% 1.2%
...R.
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