EFFECTS OF HEATED EFFLUENTS
81
FIG. 7. Dense growths of rapidly growing Ciona on test panels exposed in the heated
dock at Swansea. Specimens were about 2 months old and meaaured up to 20 om
inlength. (Photo: C. Stockton).
is often regarded as a cosmopolitan form which ranges into subtropical
areas. However, there are known to be physiological races within this
species (Veillet and Demeusy, 1953; Demeusy, 1958; Carlisle, 1957) and
Mediterranean forms at least have recently been reinstated as a separate
species (Holthuis and Gottlieb, 1958).
The effects of heating on the breeding of lower latitude species in
A.P.B.--R
E
81
FIG. 7. Dense growths of rapidly growing Ciona on test panels exposed in the heated
dock at Swansea. Specimens were about 2 months old and meaaured up to 20 om
inlength. (Photo: C. Stockton).
is often regarded as a cosmopolitan form which ranges into subtropical
areas. However, there are known to be physiological races within this
species (Veillet and Demeusy, 1953; Demeusy, 1958; Carlisle, 1957) and
Mediterranean forms at least have recently been reinstated as a separate
species (Holthuis and Gottlieb, 1958).
The effects of heating on the breeding of lower latitude species in
A.P.B.--R
E