Han Lan-Zhi, Gu Hai-Nan, Zhai Bao-Ping, Zhang Xiao-Xi
Department of Entomology, Nanjing Agricultural University, Nanjing 210095, China.
Environ Entomol. 2008 Apr;37(2):374-81. doi: 10.1603/0046-225x(2008)37[374:rritba]2.0.co;2.
To evaluate the relationship between reproduction and migratory flight, we examined ovaries, tethered flight, and egg laying in the beet armyworm, Spodoptera exigua (Hübner). Ovarian development in female S. exigua was classified into five stages in relation to the postemergence age of the moths. Oviposition peaked at ovarian stages III and IV. Mating accelerated ovarian development in this species, and thus the mated females developed faster than the virgin moths in ovaries. In virgin adults, flight capacity increased from the first day to the third day after emergence and remained at a high level until the moths were 7 d old. In contrast, the mated moths reached the maximum flight capacity in 2 d after emergence and maintained a high level until the age of 7 d. However, mating status could not influence the flight capacity of the beet armyworm, although there were general differences in flight capacity between virgin and mated adults at the same age. Moreover, significant correlations between the number of eggs laid and the flight capacity were not performed by the mated moths. These results showed that mating status and ovarian development did not seem to influence flight capacity in the beet armyworm, which was not in agreement with the definitions of the oogenesis-flight syndrome observed in many other migratory insects.
为了评估繁殖与迁飞飞行之间的关系，我们研究了甜菜夜蛾（Spodoptera exigua (Hübner)）的卵巢、系留飞行和产卵情况。雌性甜菜夜蛾的卵巢发育根据蛾羽化后的年龄分为五个阶段。产卵在卵巢发育的III期和IV期达到峰值。交配加速了该物种的卵巢发育，因此交配后的雌性在卵巢发育方面比未交配的蛾类更快。在未交配的成虫中，飞行能力从羽化后的第一天到第三天逐渐增强，并在蛾类7日龄之前一直保持在较高水平。相比之下，交配后的蛾类在羽化后2天达到最大飞行能力，并在7日龄之前保持较高水平。然而，交配状态并不影响甜菜夜蛾的飞行能力，尽管在相同年龄的未交配和交配成虫之间飞行能力存在普遍差异。此外，交配后的蛾类产卵数量与飞行能力之间没有显著相关性。这些结果表明，交配状态和卵巢发育似乎并不影响甜菜夜蛾的飞行能力，这与许多其他迁飞昆虫中观察到的卵子发生 - 飞行综合征的定义不一致。
