The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
— We analyzed the variations in the demographic and morphological characteristics of mature Rana arvalis individuals from natural and transformed habitats near Surgut. Female frogs from the transformed habitat were significantly smaller than males and significantly younger and smaller than females from the natural habitat. The direction of sex-related differences in both populations was the same as...
— The formation of the first populations of the marsh frog (the Pelophylax ridibundus complex) near Petropavlovsk-Kamchatsky and in the Paratunka River valley must have been the result of human introduction in the late 1980s. At present, more than 20 localities of this species are recorded in Kamchatka. For a more precise definition of the taxonomic status of P. ridibundus sensu lato, samples from...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.