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Black Clam

  • December 15, 2021
  • Posted by: OptimizeIAS Team
  • Category: DPN Topics
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Black Clam

Subject – Environment

Context – CMFRI’s efforts to increase clam catch in Kerala’s Vembanad lake yield results

Concept –

  • Villoritacyprinoides, the black clam, is found in the backwaters of Kerala, mainly in Vembanad backwaters.
  • It does not show sex reversal or hermaphroditism.
  • It spawns twice a year.
  • A change in salinity is the most important factor that triggers spawning, while temperature is not a factor.
    • The optimum salinity for spawning is about 10–12 ppt.

To know about Vembanad lake, please refer November 2021 DPN.

Black Clam Environment

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