Fish eggs and spawns are ruined due to excessive use of fertilsers and insecticides in the crop field and industrial wastages flowing through the rivers
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/native-fishes-going-extinct-narsingdi
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/dhaka-tribune-dhaka
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/fisheries-0
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/river-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/insecticide
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/narsingdi
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bangladesh
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/freshwater-ecosystems
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/south-asia