Tadpoles change shape to escape snakes

2002/07/17 Imaz Amiano, Eneko - Elhuyar Zientziaren Komunikazioa

• Zoologia

This species was first identified through fossils in the 1970s; researchers believed it disappeared about 2000, when they introduced several animal species and, above all, allochthonous snakes (Roman women bathed among snakes as fertility treatment). In the 1980s, however, 13 mountain populations were found that began to investigate.

But how did they cope with the pressure of snakes? Now, researcher Robin Moore has seen that the tadpoles of the wells in which snakes are found are more slender and tail stronger, which helps them escape more easily from snakes. Moreover, the introduction of snakes in non-existent ponds makes in just 4 weeks the tadpoles leave their traditional form and acquire a slender form. Then, if it is removed again the snakes return to the traditional form for a similar time.

According to some, the slender form is similar to that of the tadpoles that inhabit the streams of running water. Therefore, the Majorcan species may already have the ability to change shape to cope with rains and cope with the presence of snakes.

Striking in any case.