推荐回答(2个)
大多数蛇产下蛇蛋后,就让其自生自灭,不做孵化。但有的蛇有孵化、护蛋的行为,如眼镜王蛇能利用落叶做成窝穴,产蛋后再盖上落叶,雌蛇伏在上面不动,雄蛇则在附近活动。蟒蛇、银环蛇、五步蛇产蛋后也有护蛋的习性,终日盘伏在蛋上不动。
蟒蛇伏在蛋堆上可使蛋的温度增高4~9℃,显然这有利于蛋的孵化。蛇蛋孵化的温度,虽然系阳光通过空气的传导供给热量,不过,切忌阳光直接照射。其原因主要在于耐受不了日晒的高温及失水过多,影响出壳率。
蛇蛋孵化基本无需另外加温,自然条件下的毒蛇和无毒蛇,都会选择一个比较适合蛇蛋孵化的场所,温度、湿度都比较适合,这是蛇的本性,让其自然孵化。
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扩展资料:
蛇蛋的孵化时间根据蛇的种类不同,有很大的差异,有的蛇蛋孵化只要几天,有的蛇蛋需要几个月的时间,而相同的蛇蛋,孵化的也受到温度的差别,出壳的时间也有长短。
蛇蛋的孵化温度一般孵化20~27℃为宜。不能太低,一旦蛇蛋孵化的温度低于20℃,相对湿度高于90%,孵化的时间就要延长,并有一部分孵化不出来;如果孵化温度高于27℃,相对湿度低于40%时,蛇蛋因水分蒸发而变得干瘪且又坚硬。
参考资料:百度百科-蛇
蛇多数为卵生,亦有卵胎生的,都是一年产一窝,很少例外。
蛇卵为椭圆形,有的较长,有的较短,大都为白色或灰白色,它和鸟卵不一样,没有保护色。卵壳厚,革质坚韧,富于弹性,不易破碎,壳由几层弹性纤维组成,为输卵管细胞所分泌,外层中杂有碳酸钙等无机物,织造精致,巧夺天工。刚产出的卵,表面有粘液,常常几个卵粘连在一处。蛇产卵并不一次全部产出,一般都是断断续续地产。例如五步蛇要每隔35~50分钟才产出一个卵。最近我们捕获一虎斑游蛇,在半小时内就产出46个卵,远远超过了过去一窝最多卵数为24个的纪录。
各种蛇卵的大小,千差万别,盲蛇的卵只有花生仁那么大,而蟒蛇的卵,小的像鸡蛋,大的比鹅蛋还大。
绝大多数的蛇不会做窝,卵一般产在不冷不热、不干不湿、温湿度适宜于孵化的隐蔽场所,获得的热量(来自太阳光或茎叶腐烂)足够供胚胎发育的地方。产卵地点多种多样,但多在天然洞穴、肥料堆、柴草垛、废弃的动物窝等处产卵。有的蛇有“改建”原有洞穴的能力,如果洞大小,它会爬进爬出加以扩大。有的蛇则靠头部的活动把上挖松,而用尾部把土扫出去,挖出一个洞穴来。产卵通常是一条蛇一个地方,但亦有同一种蛇聚集在一处产卵的,产卵总数可达3000枚之多,这种习性对卵的孵化是有利的。因为在孵化过程中,胚胎散发的热和水分,对卵的孵化有相互促进的作用。
从交配到产卵的时间,在各种蛇里面,有长有短,美洲黑蛇为1~2个月,束带蛇为87~116天,黑眉锦蛇为51天,草原响尾蛇为4~5个月。最长的可达半年以上。
每窝所产的卵数,各种蛇差别很大,最少的是1枚,最多的可达100枚以上。
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