Hossam I. Kadira, Ibrahim I. Al-Hawary, Abdallah Salah and Zizy I. Elbialy, 2025. Aging and Infection-Based Alterations in Collagen Type 1 of Nile Tilapia (Oreochromis niloticus L.) Skin. Pakistan J. Zool., 57: 1717-1726. DOI: https://dx.doi.org/10.17582/journal.pjz/20220925230911