Journal
ENTOMOLOGIA EXPERIMENTALIS ET APPLICATA
Volume 170, Issue 8, Pages 708-717Publisher
WILEY
DOI: 10.1111/eea.13196
Keywords
Amauropelta; fern-feeding insects; host specialization; host switching; larval development; Lepidoptera; Macrothelypteris; pteridophyte; spore consumption; spore feeders; Stathmopodidae; Thelypteridaceae
Categories
Funding
- National Council of Science and Technology of Mexico (CONACYT) [589325]
- Instituto de Ecologia, A.C. [20030-10796, 20030-10128]
Ask authors/readers for more resources
This study investigates the adaptation of a spore-feeding moth on different host plants. The results show that when larvae were transferred to alternative hosts, they were able to complete their life cycle but consumed more spores, took longer to reach adulthood, and had lower survival rates. These findings suggest a strong adaptation of the moth species to its original host plant.
Fern-feeding insects have not received much attention because ferns have been considered herbivore-resistant plants. However, ferns are attacked by herbivorous insects, including specialized spore feeders. For a better understanding of host specialization, we investigated the effect of experimentally transferred larvae of a spore-feeding moth, Stathmopoda sp. (Lepidoptera: Stathmopodidae), from its original fern host Amauropelta linkiana (C. Presl) Pic. Serm., to three closely related species [Amauropelta rudis (Kunze) Pic. Serm, Amauropelta oligocarpa (Humb. & Bonpl. ex Willd.) Pic. Serm., and Amauropelta resinifera (Desv.) Pic. Serm.], and one alien fern species, Macrothelypteris torresiana (Gaudich.) Ching (all Thelypteridaceae). After experimental host-plant transfer, we measured spore consumption of the larvae, and the survival and duration of each developmental stage. Once larvae were transferred to alternative hosts, they were still able to complete their life cycle, but consumed more spores, required more time to reach the adult stage, and had lower survival rates than on their original host, or even skipped the fifth instar on alternative hosts. Thus, our results suggested a strong adaptation of this moth species on its original host plant. We discuss some traits of experimental hosts, as the spores may contain fewer nutrients, or higher concentrations of toxic agents for larval development, thus restricting successful host-plant switching. Further studies to measure the frequency and successful colonization of alternative hosts in nature are needed, by assessing variation in the chemical composition of spores between original and alternative hosts.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available