Migratory Helicoverpa armigera (Lepidoptera: Noctuidae) Exhibits Marked Seasonal Variation in Morphology and Fitness. Issue 3 (16th May 2019)
- Record Type:
- Journal Article
- Title:
- Migratory Helicoverpa armigera (Lepidoptera: Noctuidae) Exhibits Marked Seasonal Variation in Morphology and Fitness. Issue 3 (16th May 2019)
- Main Title:
- Migratory Helicoverpa armigera (Lepidoptera: Noctuidae) Exhibits Marked Seasonal Variation in Morphology and Fitness
- Authors:
- Zhou, Yan
Wu, Qiulin
Zhao, Shengyuan
Guo, Jianglong
Wyckhuys, Kris A G
Wu, Kongming - Abstract:
- Abstract: Many insects adopt seasonal, trans-latitudinal migration in response to altering climatic conditions, resource availability or reproductive requirements. Though the migration behavior of the cotton bollworm, Helicoverpa armigera (Hübner)(Lepidoptera: Noctuidae), has been well-studied, little is known about the extent of intra-specific variation between northward- and southward-migrating individuals. In this study, we captured H. armigera adults along the species' migration route during 2017–2018 to determine seasonal variability in their morphology, flight capability, and reproductive performance. Northward migrants have broader, longer bodies and are 1.33 times heavier than southward migrants, hinting at a comparatively higher allocation of resources in the abdomen. Accordingly, the former migrants engaged in longer flights, had greater reproductive capacity and a longer lifespan than southward ones. As northward migrants originate from favorable environmental conditions, their fitness is higher than that of the southward cohorts that develop on less favorable host plants and in perhaps more adverse climatic or ecological conditions. Northward H. armigera migrants thus possess an advantageous morphology that benefits habitat colonization and resource exploitation. Our work offers a novel perspective on the ecological and reproductive benefits of long-distance migration and can aid the development of population monitoring and forecasting methods for this globallyAbstract: Many insects adopt seasonal, trans-latitudinal migration in response to altering climatic conditions, resource availability or reproductive requirements. Though the migration behavior of the cotton bollworm, Helicoverpa armigera (Hübner)(Lepidoptera: Noctuidae), has been well-studied, little is known about the extent of intra-specific variation between northward- and southward-migrating individuals. In this study, we captured H. armigera adults along the species' migration route during 2017–2018 to determine seasonal variability in their morphology, flight capability, and reproductive performance. Northward migrants have broader, longer bodies and are 1.33 times heavier than southward migrants, hinting at a comparatively higher allocation of resources in the abdomen. Accordingly, the former migrants engaged in longer flights, had greater reproductive capacity and a longer lifespan than southward ones. As northward migrants originate from favorable environmental conditions, their fitness is higher than that of the southward cohorts that develop on less favorable host plants and in perhaps more adverse climatic or ecological conditions. Northward H. armigera migrants thus possess an advantageous morphology that benefits habitat colonization and resource exploitation. Our work offers a novel perspective on the ecological and reproductive benefits of long-distance migration and can aid the development of population monitoring and forecasting methods for this globally important agricultural pest. … (more)
- Is Part Of:
- Environmental entomology. Volume 48:Issue 3(2019)
- Journal:
- Environmental entomology
- Issue:
- Volume 48:Issue 3(2019)
- Issue Display:
- Volume 48, Issue 3 (2019)
- Year:
- 2019
- Volume:
- 48
- Issue:
- 3
- Issue Sort Value:
- 2019-0048-0003-0000
- Page Start:
- 755
- Page End:
- 763
- Publication Date:
- 2019-05-16
- Subjects:
- Helicoverpa armigera -- seasonal migration -- morphological variation -- flight and reproductive capability -- aerobiology
Beneficial insects -- Periodicals
Beneficial insects -- United States -- Periodicals
Insect pests -- Control -- Periodicals
Entomology -- Periodicals
632.7 - Journal URLs:
- http://ee.oxfordjournals.org/content/ ↗
http://www.oxfordjournals.org ↗ - DOI:
- 10.1093/ee/nvz049 ↗
- Languages:
- English
- ISSNs:
- 0046-225X
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 3791.464000
British Library DSC - BLDSS-3PM
British Library STI - ELD Digital store - Ingest File:
- 11994.xml