Cave Critters, creepy or cool? Efrain Chavez
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Cave Critters, creepy or cool? Efrain Chavez
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In this episode of Tech Diving On Air, host Tamara sits down with Dr. Efraín Chávez, a Postdoc, researcher at UMDI Sisal, part of UNAM (National Autonomous University of Mexico), and cave diver who specializes in the ecology of groundwater fauna in the Yucatan Peninsula.
Together, they dive deep into the super interesting but overlooked world of the fauna in the
cenotes, challenging the common misconception that caves are lifeless voids. Efraín bridges the gap between rigorous scientific research and technical exploration, revealing the fascinating evolutionary adaptations of "stygobitic" creatures—animals that have evolved to thrive in total darkness. From the evolutionary process and the energy-economic process of losing one's eyes to the critical health state of the aquifer, they discuss why these tiny, blind creatures are the canaries in the coal mine for the region's water quality.In this episode, we discuss:
- Life in the dark: Dispelling the myth that caves are boring or dead, and understanding the complex ecosystems thriving beneath our feet.
- Evolutionary biology: How and why species like the blind fish (
- The cast of characters: A closer look at the unique inhabitants of the Yucatan cenotes, including the rare blind eel, isopods, and the ancient, centipede-like Remipedes.
- Conservation and threats: The impact of pollution, over-extraction, and climate change on the fragile groundwater systems and the 67 documented species within them.
- Citizen Science: How divers can contribute to research through photography, utilizing tools like iNaturalist and supporting the Cenoteando initiative.
- Practical identification: What to do when you spot a "cave critter" and how to distinguish between different species during a dive.
About the guest: Efrain lives and works in Merida Yucatán and has developed a thriving technical diving career and professional diving path as a GUE diver among others. He’s passionate about the environment, research and the hands on experience of making science in places most scientists will never reach.
Connect with Efrain Chavez:
- Website:
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- LinkedIn:
- E-mail:
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