This study investigates how water temperature variation impact growth and survival in bay scallops (Argopecten irradians) across different environments and gear types. The research evaluates scallop performance in both nursery and grow-out settings, focusing on seasonal temperature effects, especially in the fall and winter. The study’s objectives are to (1) assess temperature variation across gear types (bottom-based vs. floating), (2) evaluate scallop growth and survival in different locations, and (3) identify optimal gear configurations for productivity and sustainability in different seasons.
The study is conducted at Roger Williams University’s outdoor flow-through nursery system and a 2-acre aquaculture farm in Mount Hope Bay, Rhode Island (RI Coastal Resources Management Council File No. B2022-04-046). Gear types include bottom cages, floating plastic baskets, and boxed bags, each stocked with 150 scallops of uniform size. Onset HOBO® pendant temperature loggers record data hourly, enabling precise monitoring of temperature variation across gear types. Additional environmental parameters, including pH, dissolved oxygen, total ammonia nitrogen (TAN), and nutrient levels, are monitored to assess the broader environmental impact on scallop performance. Statistical methods, including linear mixed models (LMMs) and analysis of variance (ANOVA), will be used to assess temperature variability and performance across gear and location settings.
We hypothesize that floating gear will show greater temperature variation and thus more variable growth rates, while bottom-based systems may provide stable temperatures that enhance survival rates. Analyzing seasonal temperature fluctuations, especially during colder months, provides data-driven insights on gear suitability for varying environmental conditions. This study will guide best practices for bay scallop farming, optimizing growth and supporting sustainable aquaculture in changing conditions. Findings aim to improve economic viability and sustainability, guiding aquaculture producers toward strategies that enhance productivity and environmental resilience.