D3367: Hunters of wigglers: A student laboratory activity to quantify odonate larvae eating mosquito larvae

This student lab activity allows students to investigate the ecological relationship between dragonflies and mosquito larvae, to explore the potential of dragonfly predation as a natural control method for mosquito populations. This hands-on experiment allows students to observe and analyze the feeding behavior of dragonflies on mosquito larvae. First, students set up experimental containers, creating a simple aquatic environment suitable for dragonfly naiads and mosquito larvae. Students are prompted to design and conduct experiments to test factors that may influence dragonfly predation, such as water temperature and habitat structure. Next, students introduce dragonfly naiads and mosquito larvae into the experimental chambers at varying densities. The feeding behavior of dragonflies is observed and recorded over a predetermined period. Students document the frequency and success rate of predation events, noting any observed strategies or behaviors employed by the dragonflies during hunting. Students calculate predation rates, estimate the number of mosquito larvae consumed, and use this data to create a formal scientific report. Through this lab activity, students gain insights into the potential role of dragonflies in natural mosquito control. This activity promotes critical thinking, scientific inquiry, and environmental awareness and by engaging in this activity, students practice essential scientific skills, including experimental design, data collection, analysis, and interpretation. Furthermore, students acquire a deeper understanding of the interconnections within ecosystems and the potential applications of ecological knowledge to address pest management challenges.