The reproductive season of the southern marbled newt is between October and March or April (2). Like many other species in the genus Triturus, breeding begins with a courtship display, with the male southern marbled newt raising its tail and waving the tip, encouraging the female to snap at it (8). The male then releases a spermatophore which is taken into the cloaca of the female, fertilising the eggs inside the female’s body (9).
The southern marbled newt lays 100 to 150 eggs (2), with the female depositing a single egg at a time, usually over a period of around 2 months (7) (9), over an average period of two months (7). The female lays each egg within the leaf of an underwater plant, subsequently folding the leaf with the hind legs to attach and support the egg (6) (9) (10). The eggs of amphibians are coated with a protective jelly and, once hatched, newt larvae are usually carnivorous and receive no further parental care. After a period of development, the larvae will metamorphose into the adult form (5) (10).
As in other amphibians, the skin of the southern marbled newt is important in respiration. Oxygen is taken in through the skin and carbon dioxide is released, creating a constant need for moist environments to allow gas exchange (5).
All newts are carnivorous and take small invertebrates such as insects, slugs, snails and worms (5).