田鳖属昆虫通常有分为两类,一类是较为常见的种类例如:负子蝽,体型不大,最大约4公分左右,雄虫与雌虫交配后,雌虫会将卵块产于雄虫背上,皆由雄虫负责照顾背上的卵块直到孵化,而雌虫产完后会自行离开;而另一类则是较大型数量较少的品种,例如:大田鳖,体型最大可超出5公分,最大品种相当于世界最大甲虫的尺寸,有著“巨鱼杀手”(giant fish killers)的特名[1] (页面存档备份,存于互联网档案馆),会攻击体型比自己大的生物,但这种大型种将不会把卵块产于雄虫背上[1],则是将卵块产于不会接触到水面的各种竿状水生植物上,并由雄虫担任守卫捍卫天敌,并在卵块上提供适当的水分防止其干燥直到孵化。
N. Ichikawa. Male brooding behaviour of the giant water bug Lethocerus deyrollei Vuillefroy (Heteroptera: Belostomatidae). Journal of Ethology. 1988, 6 (2): 121–127. doi:10.1007/BF02350877.
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