common spadefoot toad

Daily Diet of Pelobates fuscus (Pelobatidae, Amphibia) in the Khoper River Floodplain (Saratov Region)

The daily diet of Pelobates fuscus in local populations in the Khoper river floodplain is considered. The absence of gender differences in their daily diet is shown. Most of P. fuscus prey is made up of animals weighing 10–25 mg and having body lengths of 8–18 mm. Hymenoptera (70.8%) and Coleoptera (52.1%) predominate by the number of specimens and by biomass, respectively. The number of daily caught invertebrates usually does not exceed 15. The lowest feed consumption is in April and October, while the highest one is in the summer months.

Body Size and Condition Dynamics of Pelobates fuscus (Anura, Pelobatidae) Metamorfs under Transphormation of Floodplain Lakes Hydrological Regime

The long-term dynamics of size and weight characteristics and body condition of Pelobates fuscus metamorphs in five local populations of the Medveditsa river floodplain (Saratov region) are analyzed. The limits of changes in body length, live and dry weight, and the body condition index (W/SVL) of males and females were established. In 2009 - 2018 the size and weight parameters of the P. fuscus metamorphs had a significant level of interannual variation. The body length was 21.0 to 44.0 mm in males and 22.1 to 44.0 mm in females.