eng Science and Education Publishing Applied Ecology and Environmental Sciences 2328-3920 2022-03-01 10 2 65 68 10.12691/aees-10-2-6 AEES20221026 article Subir Mal subir.mal@gmail.com 1 Harekrishna Bar 2 Nilanjana Chatterjee 3 Priyanka Halder Mallick 3 Department of Zoology, Vidyasagar University, Midnapore, West Bengal, India, 721102 Department of Chemistry, Sabang Sajanikanta Mahavidyalaya, West Midnapore, India, 721166 Department of Zoology, Ramananda College, Bishnupur, Bankura, India, 722122 Nanoparticles have been applied on different organisms to reveal their effect on them. A study was conducted to record the effect of silver nanoparticles (AgNPs) on gonadal (testes) histopathology indices of Indian minor carp Labeo bata (Hamilton, 1822). Gonadosomatic index (GSI) was calculated in control and treated male fishes (100µg/liter) for 14 days, 28 days, 42 days intervals and the histopathological alterations were correspondingly observed. Results showed that AgNPs cause significant reduction in GSI value of treated fish, indicating subsidence in their reproductive status. Further histological observation of testes in treated fishes showed definite alternation of structure in early stages of reproductive cells, disruption of Sertoli cells, Leydig cells, etc. Thus, AgNPs were found to exert significant effect on the reproductive structure and reproduction process in Indian minor carp Labeo bata (Hamilton, 1822) which may be a concern for their viability and sustenance in future. http://pubs.sciepub.com/aees/10/2/6/aees-10-2-6.pdf AgNP Labeo bata testes GSI histopathology