摘要
前期研究表明,在食物充足的条件下,翅二型丽斗蟋雌成虫长、短翅型间存在着资源投入和收益的权衡关系(trade-off);而雄成虫长短翅型间不存在此类权衡关系。在自然条件下,昆虫可能遭受食物缺乏的胁迫,因而进一步就食物胁迫对丽斗蟋飞行肌和繁殖发育的影响进行了研究。结果表明,在食物胁迫的条件下,长翅雌虫仍维持飞行肌的发育,但繁殖发育受到显著的抑制;而短翅雌虫飞行肌显著降解,繁殖发育亦维持在较高水平。说明即使是营养缺乏时,其雌成虫长、短翅型也依然存在资源配置的差异,具飞行肌和繁殖发育的权衡关系。长翅雄虫飞行肌的重量与食物充足组并无显著差异,但精巢的干重显著降低;而短翅雄虫在食物胁迫条件下飞行肌显著降解,但其精巢重量与食物充足组并无显著差异。可以认为,丽斗蟋雄虫的长、短翅型间也存在飞行肌和繁殖发育的权衡关系。
The cricket species Velarifictorus ornatus displays distinct wing dimorphism-individuals are either micropterous with much degenerate wings or macropterous with fully developed wings. In previous study, we found that there was a trade-off between flight muscle and reproductive development in female V. ornatus, but not in male, when insects were provided with sufficient food. However, insects may not be able to get enough food in natural condition, and suffer from food stress. Thus, we investigated effect of food stress on flight muscle and reproductive development of V. ornatus in this study to understand whether long-winged （LW） adults preferentially allocate limited resources in flight muscle development, while short-winged （SW） adults allocate them in reproductive development firstly. The results showed that food stress significantly suppressed flight muscle development of SW female, but did not affect flight muscle development of LW female. By contrast, ovarian development of LW female was inhibited dramatically by food stress, but ovarian development of SW female maintained at high level when food supply was reduced. It was suggested that there was a trade-off between flight muscle and reproductive development in female V. ornatus. Like the female, food stress also significantly inhibited flight muscle development in SW male, but not in LW male. Fresh weight of testis did not change significantly in both of LW and SW male when different amount of food was given. However, dry weight of testis was significantly decreased in LW male, while dry weight of testis of SW male did not change significantly when food supply was reduced. This result indicated that trade-off between flight muscle and reproductive development also existed in male V. ornatus.
出处
《生态学报》
CAS
CSCD
北大核心
2014年第11期2963-2970,共8页
Acta Ecologica Sinica
基金
国家自然科学基金青年基金(31200494)
湖南省高校创新平台开放基金项目(12K068)
关键词
翅二型
飞行肌
卵巢
精巢
附腺
丽斗蟋
wing dimorphism
flight muscle
ovary
testis
accessory gland
Velarifictorus ornatus
