TABLE I
Inforniation Available on The Effects of Organochlorine Insecticides on Some Vertebrate Species Studied iu Britain
.p
Recent
Changes
Population
Residue Analysis
Toxicology
Population
Authorities
Systematic Systematic Local
Local
Acute
national
national
studies
studies
oral
Sublethal
Species
studies
studies
made
made
Systematic Incidental toxicity effects on
made
made
before
after
national
national
data reproduction
before 1940 after 1940
1940
1940
available
studied
-
Heron
+
+
+
+
0
+
r)
0
No change Stafford, in prep.
Great Crested Grebe
+
+
I+
0
f
0
0
Increase
Prestt (1966)
(Ardea cinerea)
Peregrine
0
+
0
+
0
-
0
0
Large
Ratcliffe, (1963,
(Palco peregrinus)
decrease
1965)
Sparrow -Hawk
0
+
0
+
0
+
0
0
Large
Prestt (1965 and
Buzzard
0
+
0
+
0
+
0
0
Slight
Prestt (1965)
(Buteo buteo)
decrease
Pheasant
0
0
+
+
0
+
-
+ No change Genelly and Rudd
(Phasinnus colchicw)
(1956),
(Podiceps cristatus)
3
a
3
(Accipiter nisus)
decrease
in prep.)
0
5a
‘
11
DeWitt (1956),
Szevedo et al.
(1966), Taylor
and Ash (1964)
0
?
Turtle et al. (1963)
Feral Pigeon
0
0
0
0
0
+
i
(Columbus livia)
Shag
0
0
0
+
0
+
0
0
Increase
Potts (unpub.)
(Phalacrocornx
(limited
oristotelis)
systematic)
~
~~
For
0
0
0
0
0
+
+
0
?
Blackmore (1963),
(Vulpea vu2pee)
Taylor and
Blackmore (1961)