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生态学报  2008 

Embryonic growth and mobilization of material and energy in oviposited eggs of the white-striped grass lizards Takydromus wolteri
白条草蜥(Takydromus wolteri)胚胎生长及物质和能量的动用

Keywords: Takydromus wolteri,egg,incubation,embryonic growth,mobilization of material and energy
白条草蜥
,,孵化,胚胎生长,物质和能量动用

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Abstract:

研究白条草蜥卵在温、湿度分别为30℃、-12kPa的条件下,孵化过程中胚胎生长以及对物质和能量的动用。孵化过程中,每隔5d测定卵重。孵化第10、15、20天,分别解剖来自不同窝的卵15、15、12枚,分离为胚胎、卵黄和卵壳。初生幼体测量、称再后冰冻处死,随后解剖分离为躯干、剩余卵黄和腹脂肪体。所有材料65℃恒温干燥,用索氏脂肪提取仪测定脂肪含量,氧弹式热量计测定能量含量,马福炉测定无机物含量。白条草蜥卵的平均孵化期为24.7d。卵孵化时从基质中吸水导致重量增加。卵孵化0—15d、15~20d、20~24.7d,胚胎分别利用新生卵能量的11%、14%和75%。0—20d,胚胎生长缓慢;20d后生长迅速。卵孵化过程中,干重、非极性脂肪和能量的转化率分别为50.3%、24.9%和51.9%。初生幼体的能量组分为:躯干95.2%,脂肪2.2%,剩余卵黄2.6%。胚胎发育所需要的无机物来自卵黄和卵壳。结果显示,白条草蜥从卵到孵出幼体物质和能量较低的转化率主要与较高胚胎发育投资和较小的剩余卵黄有关。

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