多次交配对松褐天牛精子数量消耗、产卵量和孵化率的影响
Effects of Multiple Mating on Quantitative Depletion of Spermatozoa, Fecundity and Hatchability in Monochamus alternatus
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摘要: 通过解剖松褐天牛雌虫受精囊和室内饲养观察，研究了多次交配对松褐天牛雌虫受精囊内精子数量消耗、产卵量、卵孵化率、产卵历期和寿命的影响，并对松褐天牛雌性生殖系统、精子形态及精子在雌性生殖系统中的分布动态进行了详细的描述，其结果表明：多次交配的松褐天牛雌虫受精囊内的精子数量长期保持在12万个左右，而只交配一次的松褐天牛雌虫受精囊内精子数量不断消耗，交配16天后降到5万个以下。多次交配的雌虫产卵量(167.087 0粒)和卵孵化率(94.38%)都显著大于单次交配雌虫的产卵量(113.521 7粒)和卵孵化率(83.79%)；但是多次交配的雌虫与单次交配的雌虫相比较，产卵历期和寿命差异都不显著。Abstract: The effects of multiple mating on quantitative depletion of spermatozoa, fecundity and hatchability in Monochamus alternatus Hope were investigated by dissecting spermatheca and observing the biological characteristics in the laboratory. The reproductive systems of the female, spermatozoon morphology and dynamic distribution of spermatozoa in female reproductive system were also described in this paper. The results showed that about 120 thousand spermatozoa were always retained in the spermatotheca of multiple mating females, but the amount of spermatozoa declined according to the time extension after copulation in the spermatotheca of single mating females, and the amount of spermatozoa declined to 50 thousand after 16 d. The fecundity (167.087 0) and hatchability (94.38%) of multiple mating females were significantly higher than the fecundity (113.521 7) and hatchability (83.79%) of single mating females. However, the period of reproduction and longevity were not significantly different between multiple and single mating females.
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