Biometry, hatching efficiency, growth performance and survival of the brine shrimp Artemia franciscana from Tanzania

Résumé fourni par la source

This study determined the biometry, hatchability and growth performance of a strain of the brine shrimp Artemia franciscana, a species now widely introduced globally, obtained from salt farms in the Tanga Region, Tanzania. The cysts were collected from salt pans using a 100–150-μm mesh net, and then processed and packed in airtight containers. In the laboratory, cysts were incubated in beakers at 28 °C, 35 ppt and pH 8. After 24 hours, newly hatched nauplii were transferred to rearing tanks, in triplicate, and cultured for 15 days while fed the microalga Nannochloropsis oculata. Cysts of a strain of A. franciscana from Vĩnh Châu, Vietnam, were cultured as the control. The cysts from Tanga showed greater mean capsulated cyst diameter (213.4 μm) and chorion thickness (9.7 μm) than cysts from Vĩnh Châu (208.3 μm, 8.3 μm). A higher hatching percentage and hatching efficiency were recorded for the Vĩnh Châu Artemia (p < 0.05). Nevertheless, nauplii of the Tanga Artemia exhibited a significantly higher growth rate and survival percentage (74.56%) than the Vĩnh Châu Artemia (53.85%). These findings highlight the potential of the Tanga strain for pond culture, suggesting their suitability as a live feed to enhance larviculture outputs.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.