100
N. W. MOORE
40
20
-
-
-
0)
: 0 -
a 60 -
40
-
20 -
0 -
40
20
-
-
0 -
,-2 n
B/P
WP.1
n
B/1
B/C
B/M
B/M, B
I
B/FWP
-40
- 2 0
-0
B/FWF - 2 0
- 0
MOL
FISH
MAMM
40
I 1 I I I I I I I
I
J
I
I
I
I
I
I
1
NO -01 01-05-20-100400
N o r 0 1 0 I-05-20-100-400
-1500
-1500
Residue categories
Residue categories
(Ports per million)
(Ports per million)
Fro. 3. Organochlorine insecticide residues in British birds of different feeding habits,
and in molluscs, fish and mammals, 1962-66. (Data from Moore 1965b and unpublished.)
Note: The residues of birds are of breast muscle, liver and egg contents combined. The
residues of mammals are of muscle. The residues of fish are of whole animals (small fish)
and of muscle (large fish). The residues of molluscs are of whole animals less shells. The
residues have been divided roughly into five categories on a log basis, and two other
categories - trace (less than 0.1 ppm) and not detected (less than 0.05 ppm) n are edded.
Birds -white
Molluscs - stippled
Fish - horizontal shading
Mammals - vertical shading