Freshwater animals are vanishing faster than those on land or at sea. But captive-breeding programs hold out hope.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/silent-streams
[2] http://admin.indiaenvironmentportal.org.in/category/author/doug-chadwick
[3] http://admin.indiaenvironmentportal.org.in/category/journal/national-geographic
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/freshwater-ecosystems
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rivers
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/fish
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/dams
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/sedimentation
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/endangered-species
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/biodiversity
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/united-states-america-us