Marcotte Mireille, Delisle Johanne, McNeil Jeremy N
Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, 1055 du P.E.P.S., P.O. Box 10380, Stn. Sainte-Foy, Quebec, QC, Canada G1V 4C7.
J Insect Physiol. 2007 Feb;53(2):139-45. doi: 10.1016/j.jinsphys.2006.11.005. Epub 2006 Nov 24.
The mass of the spermatophore transferred by a previously mated Choristoneura rosaceana male increases with time elapsed since the last mating but, even after 4 days, it never reaches the mass of the spermatophore of a virgin male. However, spermatophore mass is clearly not a good indicator of the male reproductive investment as the quantity of sperm in the second ejaculate of a previously mated male is the same as that of his first, if he is allowed a 2 (eupyrene sperm) to 3 day (apyrene sperm) recovery period. The interval between the first two matings had no influence on female fecundity or longevity but significantly affected fertility if the male had only 1 day to recover. The length of the post-copulatory refractory period was also shorter in females mated with previously mated males than in those mated with virgins, regardless of the male's remating interval. Furthermore, a significant variation in the eupyrene sperm content of the spermatophore transferred by virgin males had no influence on the length of the female refractory period. Globally, these results support the hypothesis that a factor, other than sperm numbers in the spermatheca, is responsible for maintaining the inhibition of pheromone production in this species.
先前交配过的蔷薇卷叶蛾雄蛾所传递的精包质量会随着自上次交配后所经历的时间增加而增加，但即便在4天后，其精包质量也从未达到未交配雄蛾的精包质量。然而，精包质量显然并非雄性生殖投入的良好指标，因为如果给予先前交配过的雄蛾2天（真核精子）到3天（无核精子）的恢复期，那么它第二次射精时的精子数量与第一次相同。前两次交配之间的间隔对雌蛾的繁殖力或寿命没有影响，但如果雄蛾只有1天的恢复期，那么该间隔会显著影响受精率。无论雄蛾的再次交配间隔如何，与先前交配过的雄蛾交配的雌蛾，其后交配不应期的长度也比与未交配雄蛾交配的雌蛾短。此外，未交配雄蛾所传递的精包中真核精子含量的显著差异对雌蛾不应期的长度没有影响。总体而言，这些结果支持了这样一种假说，即除了受精囊中精子数量之外，还有一个因素负责维持该物种中信息素产生的抑制作用。
