Morphometric characterstics and body condition of a Common spadefoot toad Pelobates fuscus insubricus population in Lombardy.

During the monitoring activities of Pelobates fuscus insubricus in the areas of the Natura 2000 network (SAC IT 2010011 Paludi di Arsago) and the Regional Park of the Ticino Valley (Lombardy) as part of the two Life projects INSUBRICUS and GESTIRE 2020, amphibians were captured in pitfall traps to collect data on the health status and seasonal migration. Ninety-six individuals were measured (SVL and weight) and photographed. Using the Image J software (vers. 1.5) other 14 morphometric measurements were obtained. The body condition index (CI) for each sex before and after reproductive activity was calculated using the Scaled Mass Index (SMI). Sexual size dimorphism was verified for some morphometric characteristics The CI appears to be strongly influenced by sex and the reproductive status. In our population P. fuscus behaves like an explosive breeder and the animals remain in water for a short period. Egg investment appears to be a relevant factor for the body condition of females, while reproduction activity does not appear to significantly impact on males. The CI is considered an effective indicator of fitness and habitat quality. Our results improve the knowledge on morphometric characteristics and body condition of the spadefoot toads in Lombardy. Moreover these results, also linked to habitat data, can provide useful indications for more targeted actions within conservation projects