Gao Yong, Kang Le
Stake Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100080, China.
Sci China C Life Sci. 2006 Aug;49(4):349-53. doi: 10.1007/s11427-006-2003-4.
Male's copulation investment, including spermatophore and sperm investment were very high in the Chinese bushcricket Gampsocleis gratiosa. The effects of mating status of both males and females on male's copulation investment were examined in this study. The fresh weight of spermatophylax increased positively with the weight of males' body. This indicated that the nutritional investment during copulation depended on male's quality. Spermatophore investment showed insignificant differences in every copulation protocols. This finding supported the paternal investment hypothesis, that is, males contributed to their offspring with little attention to their partners. Sperm releasing per ejaculation varied significantly among the trials. Males decreased 54.19% sperm in second mating than in its first mating, demonsrated that males regarded the first mating highly, and were more prudent in subsequent mating. These males' strategies may contribute to the viability of the offspring.
在中华螽斯中，雄性的交配投资，包括精包和精子投资都非常高。本研究考察了雄性和雌性的交配状态对雄性交配投资的影响。精包叶的鲜重与雄性体重呈正相关。这表明交配期间的营养投资取决于雄性的质量。在每种交配方案中，精包投资没有显著差异。这一发现支持了父本投资假说，即雄性对其后代有贡献，而很少关注其配偶。每次射精释放的精子在各试验中差异显著。雄性第二次交配时释放的精子比第一次交配时减少了54.19%，这表明雄性高度重视第一次交配，而在后续交配中更加谨慎。这些雄性的策略可能有助于后代的生存能力。
