Gong Deyong, Zhang Shichang, Jiao Xiaoguo, Hu Zhiqing, Sha Xichen, Zhang Shu, Peng Yu
State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Sciences, Hubei University, Wuhan, 430062, China.
Institute of Plant Protection and Soil Science, Hubei Academy of Agricultural Sciences, Hubei University, Wuhan, 430064, China.
Behav Processes. 2019 Oct;167:103921. doi: 10.1016/j.beproc.2019.103921. Epub 2019 Jul 31.
In a mating system in which females are monandrous and males are polygynous, females may incur a risk by mating with males with possible sperm depletion following consecutive matings. Here, we examined the effects of male mating history on male mating success and female reproductive fitness in the wolf spider Pardosa pseudoannulata by performing mating trials and sperm counting experiments. Results showed that male mating history had a significant negative impact on subsequent copulation success but had little effect on courtship duration and courtship intensity. In addition, neither male courtship intensity nor morphological measurements of males and females had significant effects on male mating success. Furthermore, male mating history had no obvious impact on the fecundity of inseminated females, with no significant differences observed in the oviposition rate of females, the numbers and the carapace width of the second-instar spiderlings between treatments. Results showed that the number of sperm decreased significantly after mating but could be replenished, with no significant differences observed between groups in which males had rested for 7 d. These findings suggest that polygynous male spiders may recharge their sperm during the mating season, but how females differentiate the mating status of males remains unknown.
在一种雌性单配偶、雄性多配偶的交配系统中,雌性与连续交配后可能精子耗尽的雄性交配时可能会面临风险。在此,我们通过进行交配试验和精子计数实验,研究了雄蛛交配史对拟环纹豹蛛雄性交配成功率和雌性交配适宜度的影响。结果表明,雄蛛交配史对后续交配成功率有显著负面影响,但对求偶持续时间和求偶强度影响较小。此外,雄性求偶强度以及雌雄蛛的形态测量对雄性交配成功率均无显著影响。而且,雄蛛交配史对已受精雌蛛的繁殖力没有明显影响,各处理间雌蛛的产卵率、二龄幼蛛数量和头胸甲宽度均无显著差异。结果显示,交配后精子数量显著减少,但可以补充,雄蛛休息7天的组间未观察到显著差异。这些发现表明,多配偶的雄性蜘蛛可能在交配季节补充精子,但雌性如何区分雄性的交配状态仍不清楚。