ArticleMarine biotechnology (New York, N.Y.)2026
Effects of a Mixed Biomass of Thalassiosira weissflogii and Chaetoceros calcitrans as a Functional Feed Additive for Pacific White Shrimp (Penaeus vannamei).
Article in Marine biotechnology (New York, N.Y.), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The Pacific white shrimp (Penaeus vannamei) industry faces significant challenges from diseases like Acute Hepatopancreatic Necrosis Disease (AHPND), driving the need for sustainable functional feed additives. This study investigated the effects of a mixed biomass of diatoms, Thalassiosira weissflogii and Chaetoceros calcitrans, as a dietary supplement for juvenile P. vannamei. Three isonitrogenous and isolipidic diets were formulated: a control diet with no microalgae, and two test diets containing the mixed biomass at 1% (Mix-Low) and 3% (Mix-High) inclusion levels. After a 60-day feeding trial, shrimp fed the microalgae diets showed significantly enhanced growth performance, with the Mix-High group achieving the highest specific growth rate (3.15 ± 0.12% day⁻¹), percent weight gain (132.5 ± 8.7%), and the lowest feed conversion ratio (1.42 ± 0.05). Furthermore, dietary supplementation significantly increased muscle protein content (21.7 ± 0.3% vs. 19.4 ± 0.1% in control). Upon challenge with Vibrio parahaemolyticus (AHPND strain), shrimp fed the control diet suffered 100% mortality within 144 h, while shrimp fed both microalgae diets exhibited 100% survival, corroborated by histopathology showing no AHPND lesions. The results demonstrate that 1-3% inclusion of mixed diatom biomass acts as a potent functional feed additive, simultaneously enhancing growth, muscle quality, and disease resistance, offering a sustainable strategy for shrimp aquaculture.
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