Prolonged diapause and its possible adaptive significance in the gall wasp Synergus itoensis (Hymenoptera: Cynipidae)

IF 0.7 4区 农林科学 Q4 ENTOMOLOGY
Yajao Wu, Yoshihisa Abe
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引用次数: 0

Abstract

Here, we report the bimodal adult emergence in a synergine gall-inducing wasp. On December 29, 2019, 150 Quercus glauca acorns containing Synergus itoensis galls were obtained from the Ito Campus of Kyushu University, Fukuoka, Japan. The galls were kept in a test tube for each acorn in the shade under field conditions until October 24, 2022. The emergence of adult wasps from the galls was recorded. More adults emerged in 2020 (151 females and 181 males) than in 2021 (120 females and 93 males); however, no emergence occurred in 2022. The sex ratio was not significantly different from 1:1 in either 2020 or 2021. The 50% emergence date was early September in both years. Acorn production in Q. glauca fluctuates greatly from year to year. Hence, oviposition resources for adult female S. itoensis are abundant in years with high acorn production, but scarce in years with low acorn production. The bimodal emergence of adult S. itoensis wasps may have evolved to adapt to the fluctuations in acorn production in Q. glauca.

Abstract Image

膜翅目:蜂科瘿蜂滞育时间延长及其可能的适应意义
在这里,我们报告双峰成虫出现在一个协同胆诱导黄蜂。2019年12月29日,在日本福冈九州大学伊藤校区获得了150颗含有增增剂(Synergus itoensis)瘿的glauca橡子。在野外条件下,每个橡子在阴凉处的试管中保存瘿,直到2022年10月24日。记录了成虫从虫瘿中羽化的情况。2020年出现的成年人(151名女性和181名男性)多于2021年(120名女性和93名男性);然而,2022年没有出现这种情况。2020年和2021年的男女性别比都与1:1没有显著差异。这两年50%的出现日期均为9月初。青松的橡实产量每年波动很大。因此,成虫雌卵在橡果丰产年份产卵资源丰富,在橡果低产年份产卵资源匮乏。成虫的双峰羽化可能是为了适应青栎果实产量的波动而进化的。
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来源期刊
Entomological Science
Entomological Science 生物-昆虫学
CiteScore
2.00
自引率
11.10%
发文量
30
审稿时长
6-12 weeks
期刊介绍: Entomological Science is the official English language journal of the Entomological Society of Japan. The Journal publishes original research papers and reviews from any entomological discipline or from directly allied field in ecology, behavioral biology, physiology, biochemistry, development, genetics, systematics, morphology, evolution and general entomology. Papers of applied entomology will be considered for publication if they significantly advance in the field of entomological science in the opinion of the Editors and Editorial Board.
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