80
( d)
E. NAYLOR
(b)
- Jan.
No sample
- Feb.
,
,
- b r .
Jul.
Aug.
Sep.
. Oct.
Dec.
1950 group
1949 group
None present
I
None present
None present
I
I
r-Y
I
0 1 2 3 4 5 6 7 8 9 1 0 ‘ 0 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2
Body length (crn)
Body length (em)
Fm. 6. Growth of Ciom intestidia (a) during 1960 in an unheated dock in Scotland
(After Miller, 1962) and (b) during 1967 in a heated dock in S., Wales (After
Naylor, 1985).
limiting than low salinities which were also recorded, for it is known that
female Curcinus from estuaries tend to migrate to deeper more saline
water where egg development takes place (Broekhuysen, 1936). So far
there is no experimental evidence to support the view that raised winter
temperatures might prevent breeding in Carcinus r n a e w and the conclusion itself might seem surprising in view of the fact that the species
( d)
E. NAYLOR
(b)
- Jan.
No sample
- Feb.
,
,
- b r .
Jul.
Aug.
Sep.
. Oct.
Dec.
1950 group
1949 group
None present
I
None present
None present
I
I
r-Y
I
0 1 2 3 4 5 6 7 8 9 1 0 ‘ 0 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2
Body length (crn)
Body length (em)
Fm. 6. Growth of Ciom intestidia (a) during 1960 in an unheated dock in Scotland
(After Miller, 1962) and (b) during 1967 in a heated dock in S., Wales (After
Naylor, 1985).
limiting than low salinities which were also recorded, for it is known that
female Curcinus from estuaries tend to migrate to deeper more saline
water where egg development takes place (Broekhuysen, 1936). So far
there is no experimental evidence to support the view that raised winter
temperatures might prevent breeding in Carcinus r n a e w and the conclusion itself might seem surprising in view of the fact that the species