Red eared terrapins and alpine newts in Scotland and their possible impact on common frog tadpoles

The result showed that long-term and short-term presence of the terrapin in the same water increased the stress levels within the tadpoles, with hormone levels indicating the presence of chronic stress when the terrapin was present.  The tadpoles in the three treatments showed no significant difference in time taken to metamorphose but the size of the froglets in the three treatments varied, with smaller animals at metamorphosis in the treatments in the presence of the terrapin.  Leer más.