Monitoring of the Endangered Cave Salamander Speleomantes sarrabusensis

SIMPLE SUMMARY: Here, we provide the information derived from the first monitoring activities performed on the endangered Sette Fratelli cave salamander, Speleomantes sarrabusensis. Adopting two different monitoring schemes, we estimated the abundance of four populations of S. sarrabusensis, providing important data for future status assessments of the species. ABSTRACT: In this study, we performed the first monitoring activities on one of the most endangered amphibians in Europe, the Sette Fratelli cave salamander Speleomantes sarrabusensis. The data presented here are derived from two monitoring activities aiming to assess the status and abundance of four populations of S. sarrabusensis. With the first monitoring, we surveyed the well-known population occurring within artificial springs during the period 2015–2018, providing monthly data on the number of active individuals. With the second monitoring performed during spring to early summer of 2022, we surveyed four populations at three time points (the one from artificial springs and three from forested areas) and we provided the first estimation of the populations’ abundance. Furthermore, we analyzed for the first time the stomach contents from a population of S. sarrabusensis only occurring in forested environments. With our study, we provided the first information on the abundance of different populations of S. sarrabusensis, representing the starting point for future status assessments for this endangered species.