Muhammad Ahsan Raza, Nabila Roohi, Abdul Qayyum Khan Sulehria and Muhammad Khalil Ahmad Khan, 2024. Population Dynamics of Rotifers as Influenced by Physicochemical Parameters and Heavy Metals at Khanki Headworks, Gujranwala, Pakistan. Pakistan J. Zool., 56: 2885-2892. DOI: https://dx.doi.org/10.17582/journal.pjz/20220517130538