Influence of Water Temperature on Fish Reproduction in Bangladesh

Purpose: The aim of the study was to analyze the influence of water temperature on fish reproduction in Bangladesh. Methodology: This study adopted a desk methodology. A desk study research design is commonly known as secondary data collection. This is basically collecting data from existing resources preferably because of its low cost advantage as compared to a field research. Our current study looked into already published studies and reports as the data was easily accessed through online journals and libraries. Findings: The study found that water temperature significantly impacts fish reproduction in Bangladesh, with optimal breeding occurring at 25–30°C. Higher temperatures (>32°C) reduced sperm motility and hatch rates, while lower temperatures (<20°C) delayed spawning. Climate change-induced temperature shifts may disrupt fish breeding patterns, affecting aquaculture productivity. Temperature regulation and seasonal monitoring are recommended for sustainable fisheries. Unique Contribution to Theory, Practice and Policy: Metabolic theory of ecology (MTE), thermal bottleneck hypothesis & brain-pituitary-gonad (BPG) axis theory may be used to anchor future studies on the influence of water temperature on fish reproduction in Bangladesh. Fisheries and aquaculture should select and breed fish species with higher thermal tolerance, ensuring stable reproductive success despite temperature changes. Governments must revise fisheries policies to integrate climate adaptation strategies, ensuring that breeding habitats and spawning seasons are protected from rising temperatures and extreme weather events.