mso-fareast-theme-font:minor-fareast; mso-hansi-theme-font:minor-fareast'有些蛇不产卵而是生蛇。看起来很胎生，但实际上，蛇卵是在母蛇的输卵管内进行胚胎发育，直至发育成幼蛇，然后生产。幼蛇的营养自始至终都来自于卵中的蛋黄，而不是来自母体，没有形成胎盘，不发生营养联系，母体只是起到“孵化器”的作用。这种繁殖方式称为卵生。蛇、响尾蛇、竹叶绿蛇和大多数海蛇等毒蛇都属于这一类。水红链蛇、红斑蛇等无毒蛇类也为卵生。卵生蛇类多生活在寒冷地区、高山地区或水中，这是它们对生存环境的适应。例如，海蛇长期生活在海水中，因此进化为卵胎生。分布于较高山区或寒冷地区的孕蛇，常将产卵的后半身暴露在阳光下，以提高温度以孵化卵，直至分娩。产仔数因品种而异，一般在10头左右，产仔数最多的毒蛇可达63头。
mso-fareast-theme-font:minor-fareast; mso-hansi-theme-font:minor-fareast' 第一垃圾立即。可以移动。大多数幼蛇首先利用未被利用的剩余蛋黄作为营养，一般不摄食，有的一出生就开始觅食。初生毒蛇的毒腺已经分泌毒液，应注意防止被咬伤。
mso-fareast-theme-font:minor-fareast; mso-hansi-theme-font:minor-fareast'同一种卵或窝产仔数随年龄、个体大小和生理状况不同而不同。一般来说，成熟、健康的蛇比年轻或年老的、小的、不健康的蛇产下更多的卵或产下更多的窝。例如，珊瑚蛇在出生后3年开始产卵，年龄3岁
'ms=''~
Arial;mso-ascii-theme-font:minor-fareast;mso-fareast-theme-font:minor-fareast;
mso-hansi-theme-font:minor-fareast'4岁每人出5张
'ms=''~
Arial;mso-ascii-theme-font:minor-fareast;mso-fareast-theme-font:minor-fareast;
mso-hansi-theme-font:minor-fareast'9个彩蛋，5年~
mso-ascii-theme-font:minor-fareast;mso-fareast-theme-font:minor-fareast;
mso-hansi-theme-font:minor-fareast'6岁每人出10个
'ms=''~
Arial;mso-ascii-theme-font:minor-fareast;mso-fareast-theme-font:minor-fareast;
mso-hansi-theme-font:minor-fareast'15个蛋，产蛋量逐年减少（表2-6-1）。
mso-fareast-theme-font:minor-fareast; mso-hansi-theme-font:minor-fareast' 表2-6-1 七大毒蛇的繁殖状况
0cm 0cm 0cm 0cm'
确切地'
mso-border-top-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm;
height:28.25pt;mso-height-rule:exactly'
mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast'物种名称
border-left:solid windowtext 1.0pt;border-bottom:none;border-right:none;
mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
background:white;padding:0cm 0cm 0cm 0cm;height:28.25pt;mso-height-rule:exactly'
mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast'再现方式
border-left:solid windowtext 1.0pt;border-bottom:none;border-right:none;
mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowte
xt .5pt; background:white;padding:0cm 0cm 0cm 0cm;height:28.25pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">产期
mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">(月）
border-left:solid windowtext 1.0pt;border-bottom:none;border-right:none; mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt; background:white;padding:0cm 0cm 0cm 0cm;height:28.25pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">产卵仔数 (枚或条）
border-left:solid windowtext 1.0pt;border-bottom:none;border-right:none; mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt; background:white;padding:0cm 0cm 0cm 0cm;height:28.25pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">卵径
mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">(mm)
border-left:solid windowtext 1.0pt;border-bottom:none;border-right:none; mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt; background:white;padding:0cm 0cm 0cm 0cm;height:28.25pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">卵重 (g)
border-left:solid windowtext 1.0pt;border-bottom:none;border-right:none; mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt; background:white;padding:0cm 0cm 0cm 0cm;height:28.25pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">孵化
mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">天数
border-left:solid windowtext 1.0pt;border-bottom:none;border-right:none; mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt; background:white;padding:0cm 0cm 0cm 0cm;height:28.25pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">备注
mso-border-top-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:27.2pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">银环蛇
border-left:solid windowtext 1.0pt;border-bottom:none;border-right:none; mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt; background:white;padding:0cm 0cm 0cm 0cm;height:27.2pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">卵生
border-left:solid windowtext 1.0pt;border-bottom:none;border-right:none; mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt; background:white;padding:0cm 0cm 0cm 0cm;height:27.2pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">6〜 minor-fareast;mso-hansi-theme-font:minor-fareast">8
border-left:solid windowtext 1.0pt;border-bottom:none;border-right:none; mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt; background:white;padding:0cm 0cm 0cm 0cm;height:27.2pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">8〜 minor-fareast;mso-hansi-theme-font:minor-fareast">12
border-left:solid windowtext 1.0pt;border-bottom:none;border-right:none; mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt; background:white;padding:0cm 0cm 0cm 0cm;height:27.2pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">34 〜 minor-fareast;mso-hansi-theme-font:minor-fareast">48 X17—19
border-left:solid windowtext 1.0pt;border-bottom:none;border-right:none; mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt; background:white;padding:0cm 0cm 0cm 0cm;height:27.2pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">
border-left:solid windowtext 1.0pt;border-bottom:none;border-right:none; mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt; background:white;padding:0cm 0cm 0cm 0cm;height:27.2pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">45—48
border-left:solid windowtext 1.0pt;border-bottom:none;border-right:none; mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt; background:white;padding:0cm 0cm 0cm 0cm;height:27.2pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">护卵
height:26.8pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">眼镜蛇
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:26.8pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">卵生
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:26.8pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">6〜 minor-fareast;mso-hansi-theme-font:minor-fareast">8
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:26.8pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">9〜 minor-fareast;mso-hansi-theme-font:minor-fareast">19
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:26.8pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">42~54 X26 〜 minor-fareast;mso-hansi-theme-font:minor-fareast">31
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:26.8pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">19 〜 minor-fareast;mso-hansi-theme-font:minor-fareast">21
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:26.8pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">47 〜 minor-fareast;mso-hansi-theme-font:minor-fareast">57
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:26.8pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">
height:28.45pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">眼镜王蛇
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:28.45pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">卵生
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:28.45pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">6
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:28.45pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">21 〜 minor-fareast;mso-hansi-theme-font:minor-fareast">51
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:28.45pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">30 〜 minor-fareast;mso-hansi-theme-font:minor-fareast">44 X 12 〜 minor-fareast;mso-hansi-theme-font:minor-fareast">20
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:28.45pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">14 〜 minor-fareast;mso-hansi-theme-font:minor-fareast">16
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:28.45pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:28.45pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">护卵
height:23.75pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">五步蛇
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:23.75pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">卵生
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:23.75pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">6〜 minor-fareast;mso-hansi-theme-font:minor-fareast">8
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:23.75pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">6〜 minor-fareast;mso-hansi-theme-font:minor-fareast">29
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:23.75pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">40 〜 minor-fareast;mso-hansi-theme-font:minor-fareast">56 X 20 〜 minor-fareast;mso-hansi-theme-font:minor-fareast">31
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:23.75pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">17 〜 minor-fareast;mso-hansi-theme-font:minor-fareast">23
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:23.75pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">24 〜 minor-fareast;mso-hansi-theme-font:minor-fareast">30
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:23.75pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">护卵
height:30.4pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">蝮蛇
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:30.4pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">卵胎生
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:30.4pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">8〜 minor-fareast;mso-hansi-theme-font:minor-fareast">10
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:30.4pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">2〜 minor-fareast;mso-hansi-theme-font:minor-fareast">20
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:30.4pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">仔蛇长
mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">154〜 minor-fareast;mso-hansi-theme-font:minor-fareast">203
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:30.4pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">仔蛇重
mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">2. 0〜 minor-fareast;mso-hansi-theme-font:minor-fareast">5. 3
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:30.4pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:30.4pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">
height:23.75pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">烙铁头
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:23.75pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">卵生
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:23.75pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">7〜 minor-fareast;mso-hansi-theme-font:minor-fareast">8
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:23.75pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">5〜 minor-fareast;mso-hansi-theme-font:minor-fareast">13
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:23.75pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">33 〜 minor-fareast;mso-hansi-theme-font:minor-fareast">37 X 20〜 minor-fareast;mso-hansi-theme-font:minor-fareast">30
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:23.75pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:23.75pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">20 〜 minor-fareast;mso-hansi-theme-font:minor-fareast">30
mso-border-left-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:23.75pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">
exactly"> mso-border-bottom-alt:solid windowtext .5pt;background:white;padding:0cm 0cm 0cm 0cm; height:30.6pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">竹叶青
border-bottom:solid windowtext 1.0pt;border-right:none;mso-border-left-alt: solid windowtext .5pt;mso-border-bottom-alt:solid windowtext .5pt;background: white;padding:0cm 0cm 0cm 0cm;height:30.6pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">卵胎生
border-bottom:solid windowtext 1.0pt;border-right:none;mso-border-left-alt: solid windowtext .5pt;mso-border-bottom-alt:solid windowtext .5pt;background: white;padding:0cm 0cm 0cm 0cm;height:30.6pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">7〜 minor-fareast;mso-hansi-theme-font:minor-fareast">8
border-bottom:solid windowtext 1.0pt;border-right:none;mso-border-left-alt: solid windowtext .5pt;mso-border-bottom-alt:solid windowtext .5pt;background: white;padding:0cm 0cm 0cm 0cm;height:30.6pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">5〜 minor-fareast;mso-hansi-theme-font:minor-fareast">15
border-bottom:solid windowtext 1.0pt;border-right:none;mso-border-left-alt: solid windowtext .5pt;mso-border-bottom-alt:solid windowtext .5pt;background: white;padding:0cm 0cm 0cm 0cm;height:30.6pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">仔蛇长 248〜 minor-fareast;mso-hansi-theme-font:minor-fareast">269
border-bottom:solid windowtext 1.0pt;border-right:none;mso-border-left-alt: solid windowtext .5pt;mso-border-bottom-alt:solid windowtext .5pt;background: white;padding:0cm 0cm 0cm 0cm;height:30.6pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">仔蛇重 3. 9〜 minor-fareast;mso-hansi-theme-font:minor-fareast">5. 0
border-bottom:solid windowtext 1.0pt;border-right:none;mso-border-left-alt: solid windowtext .5pt;mso-border-bottom-alt:solid windowtext .5pt;background: white;padding:0cm 0cm 0cm 0cm;height:30.6pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">
border-bottom:solid windowtext 1.0pt;border-right:none;mso-border-left-alt: solid windowtext .5pt;mso-border-bottom-alt:solid windowtext .5pt;background: white;padding:0cm 0cm 0cm 0cm;height:30.6pt;mso-height-rule:exactly">mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">
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mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">
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