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So their economy is now dependent on this newly acquired evasive specie. Very interesting article.

'In Mahasoa, nearly everyone participates in the crayfish economy in one way or another. People use them to fatten up pigs and chickens, or eat them with rice'

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Once the ecosystem changes to a lower energy stable level, is basically inmutable. To revert it to its former rich energy state is practically impossible, even for humans. One of the laws of ecology.

All amphibians and fishes are now crayfish meat (and mosquitoes).

evasive != invasive

Crayfish are very good at hiding.

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