Carvalho Martinho C, Queiroz Paula C D, Ruszczyk Alexandre
Departamento de Zoologia-IB, C.P. 6109, Universidade Estadual de Campinas-Unicamp, 13 081-970 Campinas-SP, Brazil, , , , , , BR.
Departmento de Biociências, Universidade Federal de Uberlândia, 38 405-382 Uberlândia-MG, Brazil, , , , , , BR.
Oecologia. 1998 Aug;116(1-2):98-102. doi: 10.1007/s004420050567.
Protandry (the emergence of males before females) is currently explained either as a mating strategy to maximize number of matings in the males, or a way to minimize pre-reproductive mortality in females. Models of protandry have generally ignored variation in female quality (reproductive potential). We recorded the sex ratio, female body mass, wing length and potential fecundity (number and mass of eggs) of the tropical butterfly Brassolis sophorae through the emergence period. Temporal variation in female size and fecundity correlated with male potential for acquiring mates. Females from the end of the emergence period showed lower fecundity and size. Males emerging before and close to the median date of the female emergence period had greater mating opportunities. Males emerging either very early or late were penalized by few mating opportunities, or by encounters with small, low-quality females, respectively.
雄性先熟（雄性比雌性先出现）目前有两种解释，一种是作为一种交配策略，以最大化雄性的交配次数，另一种是作为一种将雌性繁殖前死亡率降至最低的方式。雄性先熟模型通常忽略了雌性质量（繁殖潜力）的差异。我们记录了热带蝴蝶索氏布氏蝶在羽化期的性别比例、雌蝶体重、翅长和潜在繁殖力（卵的数量和质量）。雌蝶大小和繁殖力的时间变化与雄性获得配偶的潜力相关。羽化期末期的雌蝶繁殖力和体型较小。在雌蝶羽化期中位数日期之前及临近日期羽化的雄蝶有更多的交配机会。羽化非常早或非常晚的雄蝶分别因交配机会少或遇到体型小、质量低的雌蝶而受到不利影响。
