Effects of intermittent feeding on water quality, skin parasites, feed consumption, and growth performance of juvenile longfin yellowtailSeriola rivoliana(Valenciennes, 1833)

Abstract

This study investigated the effect of intermittent feeding on the water quality, occurrence of skin parasites, feed consumption, and growth performance of juveniles (102.7 ± 5.1 g) longfin yellowtail, Seriola rivoliana. Fish were exposed for 89 days to six different feeding regimes: continuous daily feeding fed one or twice a day (treatment 24R1 and 24R2); 2-day fasting and refed once or twice a day for 1 day (treatment 48R1 and 48R2); and 3-day fasting and refed once or twice a day for 1 day (treatment 96R1 and 96R2). Water quality was not affected by feeding strategies. Likewise, condition factor was not affected by fasting up 48 hr. On the other hand, lowest survival in 96R1 was not related with abundance of skin parasites (Neobenedenia girellae). Specific growth rate, feed intake, feed efficiency, and morphological indices were not statistically different (p > 0.05) between 2 days fasted fish and continuously fed fish. Partial compensatory growth in 48R2 could be attributed to a hyperphagic consumption (8.2 ± 1.1 g day −1 fish −1 ) and feed conversion efficiency (0.61 ± 0.03). A feeding strategy based on cyclical 48 hr of starvation followed by 1 day of refeeding twice may be used for on-growing juvenile longfin yellowtail without reduction in growth or welfare of fish.

Lack of compensatory growth response in longfin yellowtail ( Seriola rivoliana , Valenciennes, 1833) juveniles related to cyclical fasting and refeeding under rearing conditions

“…According to Jobling, Meløy, dos Santos, and Christiansen (1994), larger animals may require longer fasting period before any nutritional stress becomes evident to induce a compensatory response. However, in the present study, fasted fish were not able to show partial CG as in our previous study with smaller fish (102.7 ± 5.1 g; Argüello‐Guevara et al., 2018). All of the above‐mentioned observations may indicate that CG response in longfin yellowtail was mainly influenced by the length of the cyclical fasting period.…”

“…This species is an excellent aquaculture candidate due to its adaptability to captivity, fast growth rate, flesh quality and high market value (Roo et al., 2014). Based on the results of a previous study (Argüello‐Guevara et al., 2018), the current experiment was designed to explore the effect of short‐ and long‐term fasting and subsequent feeding on the compensatory response of longfin yellowtail juveniles.…”

“…Feed supply, feed consumption and uneaten feed estimation were determined according to Argüello‐Guevara et al. (2018). Faeces were removed from the tanks using a siphon after the last feeding.…”

Modulatory effect ofDebaryomyces hanseniiand oregano essential oil on the humoral immunity of skin mucus in Longfin yellowtailSeriola rivoliana

“…Growth and feed conversion rates were optimal compared to other species and better to the limited data reported about S. rivoliana (Argüello‐Guevara et al., 2018; Benitez‐Hernández et al., 2018; Kissinger et al., 2016), presumably revealing good health and ongrowing conditions. The viability of yeast cells that we observed 1 month after feed manufacturing led us to assume that the same amount mixed in diets was ingested alive by the fish.…”

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

“…The overcompensation of the HSI probably is a response mechanism of this species for storing excess glycogen to anticipate future feed deprivation periods as similarly reported in hybrid striped bass, Morone chrysops × Morone saxatilis (Turano, Borski, & Daniels, , ), and Chinese sturgeon, Acipenser sinensis (Liu et al, ). In contrast to this result, no effects of feeding regimes on the body composition of fish were observed in longfin yellowtail, Seriola rivoliana for 89 days (Argüello‐Guevara et al, ).…”