At 7:38 +1000 23/7/1999, Wally Day wrote:

>Why do you distinguish here between wild and farmed
>fish? Do you think the fish oil components will be
>different?


Farmed fish are fed are fed a grain-based diet, which elevates the level
of w-6 fats in their lipid profile.

Here's an extract from a message I posted to the list on May 6. The full
posting has data for game meats and poultry too.


                     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%

I believe linoleic and arachidonic are w-6 while linolenic, parinaric,
timnodonic, clupanodonic are w-3.

There are lots of other w-6 and w-3 fats that aren't listed.

FYI, wheat germ oil contains 54.8% linoleic and 6.9% linolenic fatty acids.

 ...Richard.