Nutriphysiological and cytological responses of juvenile channel catfish (Ictalurus punctatus) to dietary oxidized fish oil

Abstract

An 86-day growth trial was conducted to investigate the effect of dietary oxidized fish oil on the growth and cytopathology of juvenile channel catfish (Ictalurus punctatus). Four diets containing 0 g kg À1 (control: fresh fish oil), 30 g kg À1 (low-oxidized oil group), 60 g kg À1 (medium-oxidized oil group) and 90 g kg À1 (high-oxidized oil group) graded oxidized oil levels with the same dietary lipid level (90 g kg À1 diet) were evaluated. The results show that the specific growth rate decreased with increasing dietary oxidized oil level (P < 0.05). All examined liver and kidney tissues in all dose groups exhibited what appeared as dosedependent cellular modifications. In addition, lipid droplet accumulation in the hepatocytes of fish in all dose groups was increased, and their localizations were distinctly different between all dose groups. The ultrastructural changes suggest the progression of mitochondrial vacuolation, especially in the renal tubules, in all dose groups. These results reveal a previously underappreciated effect of dietary oxidized fish oil on channel catfish kidneys. Overall, a series of nutriphysiological responses were adversely affected by exposure to dietary oxidized fish oil, and the corresponding interference patterns on the metabolism and transport of nutrients within cells were observed.

Responses of yellow catfish (Pelteobagrus fulvidraco Richardson) exposed to dietary cyanobacteria and subsequent recovery

“…In addition, fish regulate their feed intake depending on their energy requirement (Kaushik and Luquet, 1984). Similar finding was also observed in other fishes after exposure to dietary toxins (MCs, aflatoxin B 1 and oxidized fish oil), which the fishes may increase their feed intake in relation to "energy requirement" for maintaining their physiological requirement or combating the oxidative stress induced by toxins Dong et al, 2009Dong et al, , 2012Huang et al, 2011).…”

“…Similar result was also observed in hybrid tilapia after exposure to highcyanobacteria diet (Dong et al, 2009). This higher FR in yellow catfish fed with the HCD could be due to the Hormesis (a biphasic doseeresponse with a low dose stimulation or beneficial effect and a high dose inhibitory or toxic effect) (Calabrese, 1999) and dietary toxins (MCs, aflatoxin B 1 and oxidized fish oil) are sometimes known to have stimulant properties and then resulted in higher FR in our previous study Dong et al, 2009Dong et al, , 2012Huang et al, 2011). In addition, fish regulate their feed intake depending on their energy requirement (Kaushik and Luquet, 1984).…”

A combination of vitamins C and E alleviates oxidized fish oil‐induced hepatopancreatic injury in juvenile Chinese mitten crabEriocheir sinensis

“…However, only a few investigations analysed the effects of dietary oxidized lipids on affected tissues at the cellular and subcellular level. Dong et al () confirmed that highly oxidized fish lipid led to cellular injury in the liver, kidney and muscle tissues of channel catfish. Likewise, Laohabanjong et al () found that oxidized lipids in fish meal caused degenerative changes in the hepatopancreatic tubules of black tiger shrimp.…”

“…In this study, statistically significant lower body weight gains, FEs and HPIs were observed in crabs fed on diets containing OFO, which was quite consistent with reports in whiteleg shrimp (Yang et al, ). When fed on diets with OFO, some fish, such as channel catfish ( Ictalurus punctatus ) and black sea bream ( Acanthopagrus schlegeli ), also showed lower survival rates (Dong et al, ; Peng et al, ). Similarly, in a previous study in which mitten crabs were fed on diets with up to 6% OFO, a lower survival was observed (Wang, Li, et al, ).…”

The effect of dietary oxidized lipid levels on growth performance, antioxidant enzyme activities, intestinal lipid deposition and skeletogenesis in Senegalese sole (Solea senegalensis) larvae

“…. . lack of information is due to the fact that most of the studies dealing with dietary oxidized lipids have been conducted using inert diets (Mourente et al 2002;Fontagn e et al 2006;Zambrano & Landines 2011;Dong et al 2012). However, sufficient levels of VE can be accumulated and maintained in Artemia metanauplii, making this live food a delivery system useful for studying dietary requirements as well as the antioxidant effects of VE in marine fish (Huo et al 1996).…”