Title: Influence of River Proximity on Water Quality and Its Impact on Caribbean Mangrove Oyster Populations: A Case Study in Bowden Bay, St. Thomas, Jamaica

Abstract

This study explored how distance from the open sea and abiotic factors affect the population abundance and shell dimensions of Crassostrea rhizophorae (CR) and Isognomon alatus (IA) in a mangrove estuary at Bowden Bay, St. Thomas, Jamaica. Results showed a higher Crassostrea rhizophorae population closer to the open sea, and more frequently found on mangrove roots than Isognomon alatus when both species are present. Both species exhibited variability in population size and shell dimensions across different sites, with IA generally having more prominent individuals at specific locations. Water quality parameters, including salinity, dissolved oxygen, and temperature, varied along the estuary, significantly influencing oyster populations. Crassostrea rhizophorae favoured slightly higher salinity levels and chlorophyll-a concentrations. The study's limitations included its short duration and narrow spatial focus, calling for extended monitoring and more comprehensive analysis. Findings highlight important considerations for oyster aquaculture, habitat restoration, and conservation efforts. Understanding these environmental and habitat factors can develop better strategies for sustainable oyster culture. Future research should examine long-term environmental changes, genetic variations, and their effects on oyster populations.