What is it about?
Researchers have made a groundbreaking discovery concerning the long-distance migrations of four Amazonian goliath catfish species: Brachyplatystoma rousseauxii, B. platynemum, B. juruense, and B. vaillantii. By analyzing the presence of mature gonads in individuals and statistically examining downstream movements of their larvae and juveniles, the team mapped their inferred migration routes.
Photo by Deb Dowd on Unsplash
Why is it important?
The study revealed several significant findings: Firstly, the primary spawning regions for these goliath catfish species are located in the western Amazon. Secondly, at least three of the species—B. rousseauxii, B. platynemum, and B. juruense—spawn partially or primarily as far upstream as the Andes. Thirdly, B. rousseauxii's main spawning area is in or near the Andes. Lastly, the research unveiled that B. rousseauxii holds the record for the longest strictly freshwater fish migrations in the world.
Read the Original
This page is a summary of: Goliath catfish spawning in the far western Amazon confirmed by the distribution of mature adults, drifting larvae and migrating juveniles, Scientific Reports, February 2017, Nature, DOI: 10.1038/srep41784.
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The Dourada Catfish: An Amazonian traveller with no borders
The Dourada Catfish is an Amazonian fish which performs the World’s longest freshwater migration, covering a territory that goes from the Andes to the Amazon's river mouth at the Atlantic Ocean. His is a voyage that covers 8000 km roundtrip, showing us that the Amazon is a huge, interconnected basin.
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