Scientists Figured Out How Eels Reproduce (2022)
8 hours ago
- #migration mystery
- #conservation challenges
- #eel reproduction
- Eel reproduction remains a historical mystery, with no direct observation of mating and absence of visible reproductive organs in most stages.
- European eels undergo a complex life cycle: born in the Sargasso Sea as larvae, they migrate to Europe, mature in freshwater, and return to the Sargasso to spawn and die.
- A 2022 study confirmed eels migrate to the Sargasso Sea to breed using satellite tags, marking the first direct tracking to their spawning grounds.
- Eel populations have declined over 95% since the 1980s due to dams, habitat loss, pollution, overfishing, and illegal trade of glass eels.
- Researchers found eels migrate slowly (~4.2 miles/day) at depths over 1,000 meters, suggesting an energy-conserving strategy for reproduction.
- Conservation efforts are urged, focusing on the Azores as a key migration point and addressing barriers like dams and illegal trading.