Journal Article
Genetic Structural Changes While Maintaining Effective Population Size of Bighead Catfish in Nong Han Lake: Implications of Metapopulation Dynamics or Release Activities
Chananya Patta; Kednapat Sriphairoj; Trifan Budi; Dominic Kwesi Quanoo; Ton Huu Duc Nguyen; Wattanawan Jaito; Piangjai Chalermwong; Tavun Pongsanarm; Chadaphon Thatukan; Wongsathit Wongloet; Thitipong Panthum; Thanyapat Thong; Phanitada Srikampa; Worapong Singchat; Ryan Rasoarahona; Ekaphan Kraichak; Narongrit Muangmai; Satid Chatchaiphan; Sittichai Hatachote; Aingorn Chaiyes; Chatchawan Jantasuriyarat; Visarut Chailertlit; Warong Suksavate; Jumaporn Sonongbua; Jiraboon Prasanpan; Sunchai Payungporn; Kyudong Han; Agostinho Antunes; Prapansak Srisapoome; Sahapop Dokkaew; Prateep Duengkae; Uthairat Na‐Nakorn; Yoichi Matsuda; Kornsorn Srikulnath
Fisheries Management and Ecology · Vol. 32, Issue 4 · pp. 11-25 · 2025
Abstract
The Bighead Catfish ( Clarias macrocephalus ) plays crucial roles in the ecosystem and as a protein source for humans in Nong Han Lake, Thailand, but their ecological and population dynamics, along with their genetic diversity and structure, are poorly understood. Therefore, the dynamics of genetic diversity and differentiation of bighead catfish populations in Nong Han Lake were investigated during 2018–2023 to provide essential insights into preserving biodiversity and maintaining ecological balance. Microsatellite genotyping was used to assess the genetic diversity of one bighead catfish population in 2018, two populations in 2023, and one hatchery population. Potentially stable, effective population sizes and distinct genetic clusters of these populations were identified, which represented the resilience of populations and the complexity of their genetic dynamics. Genetic differentiation between sample dates and among populations suggested that limited recent and historical genetic exchanges could potentially influence genetic structure. The impact of ecological factors, including flooding, metapopulation dynamics, and human interventions, was indicated by unique and shared gene pools among populations and subpopulations in different years. Ongoing assessment of genetic diversity and structure of bighead populations is essential for developing conservation strategies and ensuring sustainable management.