Why Fish Stop at Indian Dams and What a Working Fish Ladder Actually Needs
The Migration Problem a Dam CreatesMahseer in the Cauvery and hilsa in the Ganga do not choose to migrate. Their reproductive biology compels it. Hilsa, Tenualosa ilisha, travel up to 1,200 kilometres from the Bay of Bengal into freshwater to spawn, navigating by olfactory cues, the chemical signature of the…
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