CAJ | 학술논문

为了解与莲草直胸跳甲Agasicles hygrophila繁殖密切相关的结构与行为特性,结合显微解剖和室内观察,对该跳甲雌雄成虫的生殖系统构造、雌成虫卵巢发育进度以及繁殖特性进行了研究.结果表明:莲草直胸跳甲雌性生殖系统包括卵巢、侧输卵管、中输卵管、受精囊及其附腺,左右卵巢一般不对称,单侧有12～16根卵巢管,受精囊豆芽状,卵巢管为端滋式;雄性生殖系统由睾丸、侧输精管及附腺、射精管和阳茎及附属器官组成,阳基叉式.根据相关形态特征,卵巢发育进度可分为发育初期(1级)、卵黄沉积前期(Ⅱ级)、成熟待产期(Ⅲ级)、产卵盛期(Ⅳ级)和产卵末期(V级)5个级别,各等级在卵巢分区长度(原卵区、生长区和成熟区)及怀卵量上存在显著差异.成虫羽化2 d后即可进行交配,16:00-18:00时为交配高峰期,雌成虫产卵高峰期12:00-16:00时,且偏好在寄主植株中部偏上叶片背部产卵;22-32℃时,雌性成虫的寿命和产卵总量随温度的上升而逐渐下降,25-30℃间差异不显著,但32℃时产卵前期延长至7.2 d,寿命和产卵量显著下降,表明32℃不利于莲草直胸跳甲繁殖.因此,推测32℃及以上持续高温造成的子代卵量急剧减少,可能是该跳甲夏季田间种群数量下降的原因之一.
위료해여련초직흉도갑Agasicles hygrophila번식밀절상관적결구여행위특성,결합현미해부화실내관찰,대해도갑자웅성충적생식계통구조、자성충란소발육진도이급번식특성진행료연구.결과표명:련초직흉도갑자성생식계통포괄란소、측수란관、중수란관、수정낭급기부선,좌우란소일반불대칭,단측유12～16근란소관,수정낭두아상,란소관위단자식;웅성생식계통유고환、측수정관급부선、사정관화양경급부속기관조성,양기차식.근거상관형태특정,란소발육진도가분위발육초기(1급)、란황침적전기(Ⅱ급)、성숙대산기(Ⅲ급)、산란성기(Ⅳ급)화산란말기(V급)5개급별,각등급재란소분구장도(원란구、생장구화성숙구)급부란량상존재현저차이.성충우화2 d후즉가진행교배,16:00-18:00시위교배고봉기,자성충산란고봉기12:00-16:00시,차편호재기주식주중부편상협편배부산란;22-32℃시,자성성충적수명화산란총량수온도적상승이축점하강,25-30℃간차이불현저,단32℃시산란전기연장지7.2 d,수명화산란량현저하강,표명32℃불리우련초직흉도갑번식.인차,추측32℃급이상지속고온조성적자대란량급극감소,가능시해도갑하계전간충군수량하강적원인지일.
In order to identify organs and behavior closely related to reproduction, observations on reproductive system and reproductive biology of the alligatorweed flea beetle, Agasicles hygrophila were conducted in the laboratory. The results showed that the female adult have 2 ovaries, each of which contains 12 -16 telotrophic ovarioles, spermatheca is in the shape of bean sprout, and the aedeagus is fork-type. Ovarian development can be divided into 5 grades based on the morphological characteristics of ovaries: stage Ⅰ (No oocyte stage), stage Ⅱ (Previtellogenic stage), stage Ⅲ (Egg maturation stage), stage Ⅳ (Ovipositing stage), and stage V (Post-oviposition stage). Each stage shows significant differences in the length of ovarian zones and egg-carrying number. In addition, the beetles could mate around 2 d after emergence, a copulation peak appears on 16:00-18:00, the oviposition peak occurrs on 12:00-16:00, and the beetles prefer to the blade back of leaf in the middle stratum of host. Temperature had a significant effect on longevity and fecundity. Female longevity and fecundity decreased with increasing of the temperature within 22-32℃, and temperatures below 22℃ or above 32℃ were unfavorable for ovarian development. At 32℃, the pre-oviposition period extended to 7. 2 d, while the longevity and fecundity decreased significantly. Therefore, it is inferred that high and constant temperature above 32℃ is a possible cause for the population decay of the alligatorweed flea beetle in summer.