The edible frog, Pelophylax esculentus, is a hybrid form that reproduces via clonal propagation of only one the parental genomes through generations hybrids while genome other species eliminated during gametogenesis. Such reproductive ability requires to coexist with or rarely both causing formation so-called population systems. Population systems and biology water frogs from east range remaine...

The taxonomy of the genus Platypygus Loew is summarized, previously described species are reviewed based on examination of types, and a key to known species of the genus worldwide is presented. All previously described species are diagnosed and illustrated. The male genitalia of P. ridibundus (Costa) and female genitalia of P. americanus Melander are described for the first time. Some character...

The time series of dates the end wintering and beginning spawning migrations marsh frog in valley middle reaches Medveditsa river (Don basin, Saratov region) was analyzed. It has been established that period from 1892 to 2021, phenological norm this phase annual cycle shifted earlier by an average 6 days (from May 2 April 26) against background climate warming. Possible consequences transformat...

During the autumn migration of many waterfowls, body mass is lowest upon arrival at the wintering area and gradually increases during the winter. Consequently, body mass is highest before the spring migration. We studied the pattern of body mass changes in the Black-Headed Gull (Larus ridibundus) from December 2010 to December 2016 in the Shinhama area of Chiba, Japan. Based on 327 captured ani...

Immune genes of the major histocompatibility complex (MHC) are among the most polymorphic genes in the vertebrate genome. Due to their polymorphic nature, they are often used to assess the adaptive genetic variability of natural populations. This study describes the first molecular characterization of 13 partial MHC class IIB sequences from three European ranid frogs. The utility of previously ...

Among the pests of cassava, the shoot fly, Neosilba perezi (Romero & Ruppell), is one of the most prevalent. It attacks mainly the terminal shoots and causes infested plants to produce lateral shoots. Reports on this species are rare or inexistent; thus, the purpose of this study was to assess three different areas for N. perezi infestation. The survey began in March 2008 and finished in Februa...