摘要
研究３ 个温度中孵出火赤链游蛇（ Ｄｉｎｏｄｏｎ ｒｕｆｏｚｏｎａｔｕｍ） 幼体的特征并评估剩余卵黄的功能。孵化温度显著影响孵化期和孵出幼体的体长和尾长。与其他类似研究结果不同的是， 低温（２４℃） 孵出的幼体体长和尾长小于较高温度（２８ ℃和３０ ℃） 孵出的幼体。在２４ ～３０℃温度范围内， 孵化温度对孵化成功率、胚胎对卵内物质和能量的利用、幼体的性比和畸形率、孵出幼体总干重及躯干长、剩余卵黄和脂肪体干重无显著影响。孵出的雄性幼体数量显著多于雌性幼体。剩余卵黄的主要功能是用于孵出幼体的早期维持和躯干的生长。新生卵内容物中８１－４ ％ 的干物质、７０－０％ 的脂肪和７９－４ ％ 的能量在孵化过程中被转移到幼体。
Influences of incubation temperatures on hatchling characteristics and the function of residual yolk were studied in the colubrid snake, Dinodon rufozonatum ,from a population in Zhoushan Islands.Duration of incubation was strongly dependent on incubation temperature,and decreased as temperature increased.The result that hatchlings from eggs incubated at a lower temperature (24℃) had a smaller body dimension (SVL and TL) than did those incubated at higher temperatures (28 and 32℃) was in contrast to that reported for other species of reptiles.Except for the influence on hatchling dimension,over the range from 24 to 32℃,incubation temperature did not affect embryonic use of material and energy and other hatching characteristics such as mass and major components (carcass,residual yolk,fatbodies,lipids and energy) of hatchlings.Incubation temperature did not determine sex of hatchlings.The overall sex ratio of hatchlings was biased towards males.The residual yolk could be used to support carcass growth and maintenance during the first days of a hathcling's life.During incubation,approximately 81 4% dry material,70 0% lipids and 79 4% energy in egg contents of the freshly laid egg were transformed to the hatchling.
基金
浙江省自然科学基金
青年人才专项基金
