Abstract
White-leg shrimp Litopenaeus vannamei juveniles (0.95±0.03g initial weight) and red seaweed Gracilaria tenuistipitata were co-cultured in 250-L tanks for 75 days. Five feeding treatments were performed, with the control group (monoculture) being fed a commercial shrimp feed at 100% feed ration (8% of biomass per day), while shrimp in the four other groups were co-cultured with red seaweed and received commercial feed at 85%, 70%, 55% and 40% of the feeding ration of the control. The results showed that the concentrations of the TAN, NO2-, NO3-, TN, PO43-, TP, and COD in the co-culture tanks were significantly lower than in the monoculture. Survival, growth rates and production of the shrimp fed at 85%, 70% and 55% feed ration of the control were superior to those in the control group (p
Highlights
Shrimp is the most important internationally traded fishery commodity in terms of value
It was noted that the co-culture of shrimp and red seaweed significantly reduced the nitrogen and phosphorus concentrations in the culture tanks that indicated red seaweed absorbed nutrient released from shrimp waste for their growth, which helped to improve water quality
The final weight and weight gain (WG) of shrimps varied in the ranges of 7.84- 14.38 g and 6.90– 13.43 g, respectively, corresponding to daily weight gain (DWG) of 0.092-0.179 g day-1 and specific growth rates (SGR) of 2.82-3.61% day-1
Summary
Shrimp is the most important internationally traded fishery commodity in terms of value. White leg shrimp (Litopenaeus vannamei) is one of important cultured species in the region. Red seaweeds (Gracilaria spp.) are important and commercially valuable resource for the industrial use (agar extraction) and human food, traditional medicine and animal feed. Co-culturing the black tiger shrimp (Penaeus monodon) with G. tenuistipitata improved water quality and feed efficiency [12]. Oceanography & Fisheries Open access Journal carried out to evaluate the effects of reduction in feeding rate on water quality, growth and feed efficiency of the white leg shrimp (L. vannamei) co-cultured with red seaweed (G. tenuistipitata) in tanks conditions. The results could provide scientific and practical information for application of this model in shrimp farming that contribute to reduce feed cost and minimize environmental impact
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