This study highlights the ecological significance of Rana esculenta as a key bioindicator species, essential for assessing environmental health and understanding the impacts of habitat degradation. The research examines the developmental stages of Rana esculenta tadpoles under controlled laboratory conditions, with a specific focus on crucial environmental factors such as temperature, water quality, and food availability. Eggs were collected from two sites in Romania and maintained in environments that closely simulated natural conditions. Over a seven-week observation period, important milestones were recorded in limb formation, organ maturation, and behavioral changes, providing detailed insights into the influence of environmental conditions on tadpole development. Results indicate that optimal temperature, between 20 and 23°C, along with high water quality, were vital for successful metamorphosis. By day 53, the majority of tadpoles had fully transitioned into juvenile frogs, displaying characteristic adult morphology of Rana esculenta. The findings underscore the critical role of maintaining healthy aquatic habitats, as poor water quality or limited food availability can negatively impact the survival and growth of tadpoles. This research contributes valuable data for conservation efforts, shedding light on the specific ecological requirements for Rana esculenta and emphasizing the species' sensitivity to environmental changes. Moreover, the study reinforces the broader role of amphibians as bioindicators, with their developmental success serving as an indicator of ecosystem health. As amphibians respond acutely to pollution, climate shifts, and habitat alterations, monitoring species like Rana esculenta can aid in detecting environmental stressors early. Ultimately, these findings support informed conservation strategies and the sustainable management of natural habitats, helping to preserve biodiversity and the overall health of ecosystems.

frog development stages, tadpole, Rana esculenta

biology

Presentation: poster