TY - JOUR AU - An, Ong Vinh AU - Huynh, Dang Huy AU - Kien, Tran AU - Quang, Hoang Xuan PY - 2014/11/11 Y2 - 2024/03/29 TI - data about reproduction of the oriental rat snake (Ptyas mucosus Linnaeus, 1758) in feeding condition at the Nghe An province JF - Academia Journal of Biology JA - AJB VL - 31 IS - 4 SE - Articles DO - 10.15625/0866-7160/v31n4.5243 UR - https://vjs.ac.vn/index.php/vjbio/article/view/5243 SP - 11-18 AB - <p>The reproduction of <em>Ptyas mucosus</em> includes 4 main periods: copulation, gestation, oviposition and after oviposition.</p> <p>The mating season of <em>Ptyas mucosus</em> begins from April to October, mainly at the beginning of April, May, June and July.</p> <p>The mating time depends on the temperature and the humidity of the environment (23.92-32.51<sup>o</sup>C, 69.7-85.87%): in April (from 10 am to 3 pm), especially from 11 am to 3 pm; in May, the copulation occurs both in the morning and in the evening, especially from 7 am to 4 pm; in June, July and August, from 6 am to 8 am and 2 pm to 7 pm; <em>Ptyas mucosus</em> rarely copulates in September and October, mainly at the end of the morning and the beginning of the afternoon (from 9 am to 2 pm).</p> <p>The characteristics of the copulation of <em>Ptyas mucosus</em> consists of three stages: having a new joy, copulation and post-copulation. There are many complicated behaviors in the first stage: attracting the attention, making primary and secondary impression. The female <em>Ptyas mucosus</em> copulates many times in the oviposition season, there is not the group mating phenomenon like grass-snake.</p> <p>The gestation period of <em>Ptyas mucosus</em> lasts for about 53 days to 73 days. The oviposition season of <em>Ptyas mucosus</em> is from June to August every year, usually in June and July. Egg-laying occurs almost all the time of the day but mainly at night. <em>Ptyas mucosus</em> lays only once a year. The number of eggs is 6 to 15, formally from 8 to 12. Eggs have well proportioned oval shapes, especially, some have pointed tips. Eggs are enveloped by hard shells. At first, eggs are soft, pinky-white, then, becoming ivory-white. Size and weight of eggs: 43.5-67.63 mm ´ 25.4-37.75 mm, 22.05-31.85 g.<strong></strong></p> <p><em>Ptyas mucosus</em> don’t have characteristics of incubation. They protect their eggs in a short time (2-3 days), and then going away. The suitable temperature for incubation is 26.8-34.6<sup>o</sup>C, humidity 63-92%. Eggs hatch after 51-70 days. They cannot hatch at the higher temperatures of 35<sup>o</sup>C.</p> ER -