The Effect Of Temperature On Reproductive Tatcic, Thermoregulation And Locomotor Performance Of Lacerta Vivipara

Lacerta vivipara, is the reptile which has oviparous-ovoviviparous reproductivemode. It is a good experimental material for exploring oviparous-ovoviviparous modeof evolutionary significance. Through the combining of laboratory and field method, wesduty that Lacerta vivipara which live in the cold-climate adapt to the environment. Themain research contents include: the effect of temperature on reproductive tactic ofLacerta vivipara, the examining of thermal tolerance under thermal acclimation andlocomotor performance. The main results and conclusions were summarized as thefollowing:Mean values for female size, litter size, litter mass and relative litter mass did notdiffer among the temperatures. The trade-off between size and number of offspring wasnot detected in the present study. Temperature significantly influenced on the date ofbirth, survival rate and phenotypes. The young from33°C were born early, but it hadmuch lower survival rate and smaller phenotypes than any other experimentaltemperature conditions. However, there were no yong born at low temperature(25°C).Lacerta vivipara were differently evident in critical thermal minimum and viabletemperature range when acclimated under identical thermal conditions. Critical thermalminimum was lowest in the T treatment, lower in the25°C treatment and highest in the33°C treatment. Viable temperature range was widest in the T treatment than the otherconstant temperature group.Different thermal treatments affeeted the maximal length and sprints peed of theyoung. The maximal length of temperatures(28and30°C) was apparently better thanthat of those. Maximum sprint speed was30°C treatment. Stride length, stride frequencyand stride speed did not different between sex in Lacerta vivipara. Locomotor speedwere both positively correlated with Stride length and stride frequency and greaterLocomotor speed had a longer and faster stride.Temperature is an important factor for affecting on reproduction of Lacertavivipara. Extreme high and low temperature are adverse for Lacerta vivipara. Theoptimum temperature for reproduction is28°C～30°C.