Stochastic variation in foraging traits within inbred lines of Drosophila

PLoS ONE, Journal Year: 2025, Volume and Issue: 20(1), P. e0289864 - e0289864

Published: Jan. 16, 2025

Investigating the causes and consequences of niche partitioning in populations is a major goal ecology evolutionary biology. Previous studies have investigated genetic environmentally induced variation resource utility their ecological implications. However, few explored variability (non-genetic, stochastic variation) as factor contributing to utility. In this study, we studied foraging traits Drosophila lutescens, species wild fruit fly. Using 70 iso-female lines from single population, observed two traits, i.e., locomotive speed preferences, an "8"-shaped experimental arena containing different types juices. The mean relative preference for orange juice over grape varied significantly among lines. Additionally, degree intraline (variability) was detected fold-change larger than 2-fold between smallest line largest line. While itself did not correlate with correlated that preferences. These results suggest within inbred both activity potentially partly shared basis may govern these traits. particular trait considered interact cooperatively several other creating phenotypic intraspecific population.

Language: Английский

Predation on Live and Artificial Insect Prey Shows Different Global Latitudinal Patterns

Global Ecology and Biogeography, Journal Year: 2024, Volume and Issue: 33(11)

Published: Aug. 16, 2024

ABSTRACT Aim Long‐standing theory predicts that the intensity of biotic interactions increases from high to low latitudes. Studies addressing geographic variation in predation on insect prey have often relied models, which lack many characteristics live prey. Our goals were explore global latitudinal patterns predator attack rates standardised and compare insects with those plasticine models. Location Global forested areas. Time Period 2021–2023. Major Taxa Arthropods, birds. Methods We measured 43 locations distributed across five continents 34.1° S 69.5° N latitude. At each location, we exposed 20 sets three bait types, one set per tree. Each included fly larvae (maggots), puparia models puparia. used glue rings isolate half non‐flying predators. Results Arthropod decreased linearly latitudes, whereas maggots had a U shaped distribution, lowest at temperate latitudes highest tropical boreal This difference emerged intensive attacks maggots, but not sites. Site‐specific arthropod predators correlated. In contrast, bird positively correlated, did show significant changes. Main Conclusions Latitudinal differ between major groups types Poleward decreases both combined do mirror our prey, latter likely reflecting real risk better than artificial

Language: Английский