Extra-Mediterranean glacial refuges in barred and common grass snakes (Natrix helvetica, N. natrix)

Morphological and Histochemical Studies of the Chromatoid Body in the Grass-snake, Natrix natrix By BHUPINDER N. SUD

The chromatoid body in the spermatogenesis of the grass-snake, Natrix natrix, has been studied by the use of phase-contrast microscopy, vital dyes, and histochemical tests. It first appears during the growth of the primary spermatocyte and is also seen in the secondary spermatocyte and late spermatid, but is absent at metaphases of both the maturation divisions, in the early spermatid, and duri...

Nesting ecology of the grass snake (Natrix natrix) and its implications for conservation

A glitch in the Natrix: cryptic presence of alien grass snakes in Switzerland

The difficulty to detect invasive species depends of numerous factors, such as morphological similarities with local taxa (Dubey et al., 2014), low densities (Fitzpatrick et al., 2009), cryptic behaviours (Mazzotti et al., 2015), or remote distribution ranges (Lass et al., 2002). In some circumstances, alien taxa hybridize with local ones resulting in individuals with intermediate phenotypes. T...

Study of Blood Parasites of the Three Snake Species in Iran: Natrix natrix, Natrix tessellata and Zamenis longissimus (Colubridae)

Infections with blood parasites are common phenomenon in reptiles from all over the world. Apicomplexan are the majority of blood parasites that frequently occur with high levels of parasitaemia in the snakes. The aim of this study was to determine the presence of blood parasites in some snakes Guilan province in the North of Iran. A total of 51 specimens of three snake species were captured in...

Biomarkers of Oxidative Stress and Acetylcholinesterase Activity in the Blood of Grass Snake (Natrix natrix L.) during Prehibernation and Posthibernation Periods

This work examined the enzymatic (superoxide dismutase-CuZn SOD, catalase-CAT, glutathione peroxidase-GSHPx, glutathione reductase-GR, and the biotransformation phase II enzyme glutathione-S-transferase-GST) and nonenzymatic (total glutathione-GSH and lipid peroxides-TBARS concentrations) biomarkers of oxidative stress and acetylcholinesterase (AChE) activity in the blood of the grass snake (Na...