|Petrozavodsk state university, email@example.com|
Summary: For the Vipers from Karelia phenomenon wintering females with embryos and the annual breeding were found. They were very large and heavy females (L.t. > 62 cm, W > 160 g), for which the mass loss due to pregnancy are not significant. Analysis of the size of 1450 individuals in a Kizhi population of viper showed that the proportion of females that can hibernate from embryos amounts to less than 3%.
© Petrozavodsk State University
Received on: 11 December 2011
Published on: 25 November 2013