Effect of Different Feed Restrictions on Growth, Biometric, and Hematological Response of Juvenile Red Tilapia (Oreochromis spp)

Abstract

Highlight ResearchThere has been a significant decrease in growth, condition factors, hepatosomatic index along viscerosomatic index with the length of time for feed restriction, although fasting for up to 28 days did not cause fish mortalityHematological parameters such as RBCs, WBCs, hematocrit, and hemoglobin decreased significantly, but after re-feeding increased significantly in consecutive timesThe blood glucose levels decreased during feed restriction and gradually increased after re-feedingFeed restriction fish gained weight continuously during re-feeding, but no displaying compensatory growthThe decrease in hematological parameters did not indicate stress levels in fish, but reflected a lack of nutrition condition AbstractThe management of red tilapia culture can be improved through restriction of feed. This study aimed to determine the impact of feed restriction time and re-feeding on the growth and hematological performance of juvenile red tilapia. This study used an experimental method with a completely randomized design consisting of five treatments with four replications, namely the fish were given food for 28 days (A), 7 days of feed restriction followed by 21 days of refeeding (B), 14 days of feed restriction followed by 14 days of refeeding (C), 21 days of feed restriction followed by 7 days of refeeding (D) and 28 days of feed restriction (E). The parameters observed were growth, biometry, and hematological values. The results showed that during the feed restriction period there was a significant decrease in growth, condition factors, hepatosomatic index along with viscerosomatic index with the length of time for feed restriction, although fasting for up to 28 days did not cause fish mortality. Hematological parameters such as RBCs, WBCs, hematocrit, and hemoglobin decreased significantly, but after re-feeding, they increased significantly in consecutive times. As for the blood glucose levels decreased during feed restriction and gradually increased after re-feeding. This study stated that feed restriction fish gained weight continuously during re-feeding, but no displaying compensatory growth. The results suggested that the decrease in hematological parameters did not indicate stress levels in fish, but reflected a lack of nutrition condition.

Feeding frequency on survival, growth, blood glucose of glass eel, Anguilla bicolor bicolor cultured in a recirculating aquaculture system

“…The increasing of blood glucose may be related to food intake where a lot of food intake that contains carbohydrate has result in increasing blood glucose due to metabolism process. The same result that blood glucose increase with increasing feeding frequency on red tilapia, Oreochromis spp [20].…”

Nile Tilapia “Oreochromis niloticus” Farming in Fresh and Geothermal Waters in Tunisia: A Comparative Study

“…Nile tilapia is a Cichlid belonging to the group of maternal mouth-brooder fish. It is characterized by a grayish coloration with pinkish breast and flanks, alternating light, black vertical stripes clearly visible especially on the caudal fin and the posterior part of the dorsal fin, a high number of long and thin gill rakers (18-28 on the lower part of the first gill arch and 4-7 on the upper part), a long dorsal fin with a spiny anterior part (17-18 spines) and a soft posterior part (12-14 rays), and a black border on the dorsal and caudal fin in males [24][25][26]. Oreochromis niloticus can be easily distinguished from any other species of tilapia that has more or less the same characteristics mentioned above, i.e., O. aureus, but which shows in males an additional red border along the edge of the dorsal and caudal fins [27,28].…”

Sodium Alginate from <I>Padina australis</I> Modulates Innate Immune and Immune Gene Expression in Red Tilapia (<I>Oreochromis</I> sp.)

“…One type of tilapia that is popular and has high economic value besides Nile tilapia (Oreochromis niloticus) is red tilapia (Oreochromis spp.) (Robisalmi et al, 2021). Tilapia is widely cultivated worldwide with total production reached 5.58 million metric tons in 2020 (FAO, 2020), and 7.3 million metric tons of total production is predicted by 2030 (Behera et al, 2018).…”