Effects of Feeding Frequencies on the Growth, Plasma Biochemistry, and Liver Glycogen of Jade Perch Scortum barcoo in a Recirculating System

Abstract

Jade Perch Scortum barcoo having an initial average weight of 7.28 ± 0.13 g (mean ± SE) were cultured in a recirculating system at different feeding frequencies that included one, two, three, or four meals a day at 5% body weight per day. Treatments were performed in triplicate using 65 fish in each replicate. After 72 d, the survival, growth, feeding efficiencies, body indices, plasma biochemistry, whole‐body proximate composition, and muscle cholesterol were measured while histological sections of the liver were stained for glycogen with periodic acid Schiff. Results showed that growth was best when fish were fed three times a day, which was significantly higher than those fed one, two or four times a day. Feeding efficiencies were significantly better for fish fed two or three times a day. Plasma glucose, plasma cholesterol, periodic acid Schiff staining intensity of the liver, and hepatosomatic index were significantly higher for fish fed three times a day compared with once a day. Whole‐body crude protein was significantly lower for fish fed once a day compared with treatments of two or four times a day. Muscle cholesterol tended to increase with increasing feeding frequencies, but the results were not significant. No significant treatment effect was detected on the plasma mineral content. Based on a feeding rate of 5% body weight/d, it is recommended that feedings are divided into three meals a day to increase available energy for optimal growth.

Influence of continuous magnetic field exposure on water properties and subsequent effects on the growth performance, plasma biochemistry, nutritive value and liver histopathology of Jade PerchScortum barcooin a recirculating system

“…Recently, Jade Perch, Scortum barcoo , has been touted as a promising aquaculture candidate for farming in recirculating systems (AlKafaji et al, ). This species is a freshwater finfish indigenous to Australia, but can be found in many countries including China, America, Malaysia and Singapore (Liu et al, ; Mok et al, ).…”

Feeding frequency affects feed intake and growth in juvenile pirarucu (Arapaima gigas)

“…For some fish species, high feeding frequencies can increase the foraging and aggressive behavior, and, consequently, energy expenditure, impairing growth and feed efficiency (Muntaziana et al 2017). In other species, low feeding frequencies may restrict food ingestion and reduce the amount of available energy for fish growth (Al-Khafaji et al 2017). Feeding frequency also varies with developmental stage (Lee et al 2000;Booth et al 2008) and rearing conditions, such as water temperature (Wang et al 2009) and availability of natural food items (Biswas et al 2006).…”

Biological Characteristics of Jade Perch (Scortum Barcoo)

“…Fast-growing jade perch, which can be stocked at high densities in recirculating aquaculture systems (RAS) and feeds on grow-out diets with very low levels offishmeal and fish oil, is a promising candidate for aquaculture [2,3]. Currently, this species is being farmed in both intensive ponds and recirlulating systems not only in Australian, but also in China, Malaysia, even in Belgium [4][5][6].Since the introduction of jade perch in China, domestic researchers have conducted several studies on the breeding and nutrition of this species. Chen et al [1,7] studied the artificial propagation of jade perch and rearing of fry and fingerlings.…”

“…Van Hoestenberghe et al [10] evaluated the effect of weaning age and the use of different sized Artemianauplii as first feed for jade perch. Alkhafaji et al [6] determined the effect of feeding frequencies on the growth, plasma biochemistry, and liver glycogen of jade perch in a recirculating system. Song et al [11] set up a study and it was also demonstrated that increasing lipid levels in fish diets was effective to improve protein utilization and decrease the nitrogen waste outputs and diet costs ofjade perch juveniles.…”