Effect of short‐term fasting and re‐feeding on growth, digestive enzyme activities and antioxidant defence in yellowfin seabream,Acanthopagrus latus(Houttuyn, 1782)

Abstract

An 80‐day feeding trial was conducted to evaluate the influence of different short‐term fasting and re‐feeding strategies on growth and physiological responses in yellowfin seabream, Acanthopagrus latus (2.4 ± 0.2 g) fingerlings. The fish were subjected to four different feeding regimes, and the control group fed four times daily to apparent satiation throughout the whole feeding period, while the other three groups were deprived for 2, 4 and 8 days followed by 8, 16 or 32 days of re‐feeding (F2R8, F4R16 and F8R32, respectively) in repeated cycles for 80 days. The fish in the control and F2R8 groups had the highest and the lowest total length, respectively (p < .05). Moreover, fish exposed to F4R16 had the highest hepatosomatic indices, while control fish had the lowest hepatosomatic indices (p < .05). Fish in the F2R8 group relatively had higher catalase and glutathione‐S‐transferase activities than other groups (p < .05). Furthermore, total protease, α‐amylase and alkaline phosphatase activities in the F4R16 and F8R32 were higher than the F2R4 and control groups (p < .05). Overall, this study showed that compensatory growth in weight and length and digestive enzyme activities were observed in the F4R16 and F8R32; however, the increase in the activity of antioxidant enzymes in the F8R32 group indicated that oxidative stress remained after 80 days of re‐feeding in the liver.

Compensatory growth of Sobaity ( Sparidentex hasta ) and yellowfin seabreams ( Acanthopagrus latus ) relative to feeding rate during nursery phase

“…In this context, in contrast, Tamadoni et al. (2020) reported that A. latus juveniles that were under 4 days of fasting and 16 days re‐feeding periods showed higher HSI compared with the control. It seems that difference in starvation and re‐feeding strategies, the severity of feed deprivation, experimental condition and feed composition may resulted in such discrepancies among results.…”

“…In addition, it has been confirmed that fish receiving a low RL has higher feed assimilation and/or conversion that associates with lower mass-specific maintenance costs during RRP (Skalski et al, 2005). In this sense, Tamadoni et al (2020) reported that A. latus juveniles showed full CG when fish subjected to 2, 4 and 8 days of feed deprivation followed by 8, 16 or 32 days of re-feeding for 80 days. Furthermore, Oh et al (2013) found complete compensation in blackhead seabream (Acanthopagrus schlegelii schlegelii), with 1 day fasting followed by 5 or 6 days re-feeding for 16 weeks.…”

“…In this sense, Tamadoni et al. (2020) reported that A. latus juveniles showed full CG when fish subjected to 2, 4 and 8 days of feed deprivation followed by 8, 16 or 32 days of re‐feeding for 80 days. Furthermore, Oh et al.…”

“…Similar to RL, growth compensatory response is species‐specific and depends on type, duration and severity of feed restriction before re‐feeding (Hayward et al., 1997). Regarding sparids, the CG responses varied from negligible (Mozanzadeh, Marammazi, Yaghoubi, Yavari, et al., 2017; Peres et al., 2011) or partial CG (Eroldogan et al., 2006, 2008; Yilmaz & Eroldogan, 2011) to complete CG (Bavcevic et al., 2010; Oh et al., 2013; Rueda et al., 1998; Tamadoni et al., 2020). Such differences are due to feeding strategies, water temperatures and culture conditions.…”

Taurine supplementation increases the potential of fishmeal replacement by soybean meal in diets for largemouth bass Micropterus salmoides

“…Somatic indices like condition factor and hepatosomatic index are crude measures for both nutritional and health status of fish (Tamadoni et al, 2020). In the present study, significantly lower condition factor was found in fish fed diets S40 and S60 compared with fish fed diet C, while no statistically difference was found in condition factor between fish fed diet C and fish fed diets S40 + T and S60 + T. Similarly, significantly lower hepatosomatic index was found in fish fed diet S60 compared with fish fed diet C, while no statistically difference was found in hepatosomatic index between fish fed diet C and fish fed diet S60 + T. Those results suggest that nutritional and health status of largemouth bass will be changed when dietary fishmeal is substituted by soybean meal at high levels, which can be revised by dietary supplementation of taurine.…”