common frog

Ice walking common frog (Rana temporaria) (Ranidae, Amphibia)

A record of Rana temporaria on the ice cover of the Gulf of Finland is described. Frog slowly moved on the ice surface with speed around 0.03 m/s. Air temperature near ice surface was +3.5°C, and the frog body temperature was +4°C. In the Saint Petersburg region, common frogs can hibernate in the coastal waters of Baltic Sea with salinity of  0 – 5.8‰.

New Approaches to Collecting Reproductive Material from Amphibians for its Use in Artificial Fertilization

This paper describes new methods for obtaining viable ovulated oocytes and testicular sperm from the carcasses of females and males of the common frog Rana temporaria, stored at +4ºС for 1–7 days. In addition, a new approach to delayed collection (1 to 30 days) of ovulated oocytes from live female frogs of the same species is given. Part of the frog testicular spermatozoa is shown to retain motility (21.0±1.5%) and fertilizing ability (13.2±1.9%) even after 6 days of storage at +4°C in the carcasses of males.