Effects of mating status on copulation investment by male bushcricket Gampsocleis gratiosa (Tettigoniidae, Orthoptera)  

作　　者：GAO Yong KANG Le 

机构地区：[1]Stake Key Laboratory of Integrated Management of Pest Insects & Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100080, China Stake Key Laboratory of Integrated Management of Pest Insects & Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100080, China

出　　处：《Science China(Life Sciences)》2006年第4期349-353,共5页中国科学（生命科学英文版）

摘　　要：Male’s copulation investment, including spermatophore; sperm investment were very high in the Chinese bushcricket Gampsocleis gratiosa. The effects of mating status of both males; 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,; were more prudent in subsequent mating. These males’ strategies may contribute to the viability of the offspring.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 sper-matophylax increased positively with the weight of males’ body. This indicated that the nutritional in-vestment during copulation depended on male’s quality. Spermatophore investment showed insig-nificant differences in every copulation protocols. This finding supported the paternal investment hy-pothesis, that is, males contributed to their offspring with little attention to their partners. Sperm re-leasing per ejaculation varied significantly among the trials. Males decreased 54.19% sperm in sec-ond 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.

关 键 词：virgin effect  EJACULATE size  COPULATION investment  Gampsocleis gratiosa. 

分 类 号：N[自然科学总论]