AbstractSome basic osteological cranial features of living and fossil members of the genus Naja are described. The extinct genus Palaeonaja Hoffstetter, 1939, is synonymized with the modern Naja Laurenti, 1768, and the extinct species Palaeonaja crassa Hoffstetter, 1939, is synonymized with Naja romani (Hoffstetter, 1939). Anatomically, the ge...... hiện toàn bộ
AbstractThe Eurasian beaver Castor fiber, formerly occurred across the Palaearctic,
but was nearly eradicated in the 19th century. Due to reintroductions in the
20th century, beaver populations are increasing and now extend into highland
areas. Natural still waters are scarce in highlands of Central Europe.
Therefore th...... hiện toàn bộ
AbstractDemographic life history traits were investigated in three Bufo calamita populations in Germany (Rhineland-Palatinate: Urmitz, 50°N; 1998-2000) and Spain (Catalonia: Balaguer, Mas de Melons, 41°N; 2004). We used skeletochronology to estimate the age as number of lines of arrested growth in breeding adults collected during the spring breeding perio...... hiện toàn bộ
AbstractInfections of amphibian eggs sometimes cause catastrophic losses of reproductive effort, but susceptibility to infection in different species is poorly understood. Using laboratory trials we showed that direct hyphal invasion of adjacent eggs by Saprolegnia caused a higher incidence of infection than invasion by zoospores. Moreover, we observed th...... hiện toàn bộ
Carlos I. Piña, Pablo Siroski, Alejandro Larriera, Valentine A. Lance, Luciano M. Verdade
AbstractAll crocodiles studied to date exhibit temperature-dependent sex
determination. During the many weeks from egg laying to hatch there is a
period of 10 to 15 d in the middle third of incubation (in the American
alligator) during which the sex of the embryo is irreversibly fixed,
referred to as the temperature-sen...... hiện toàn bộ
Beavers (Castor fiber), as typical ecosystem engineers, alter living conditions especially for amphibians through the building of dams and felling of trees, thereby changing the hydroperiod and substantially affecting forest succession stages. In this study we quantify the effects of beavers on the availability of amphibian breeding waters in the Hürtgenwald, a w...... hiện toàn bộ
AbstractHemidactylus mabouia is one of the most widely distributed species within its genus. It was first reported to Madeira in 2002 and the first individuals were considered to have originated from Cape Verde. Almost 20 years later, we found that H. mabouia has substantially expanded its distribution and can...... hiện toàn bộ