Reponses of the Hepatic Microsomal Cytochrome P450 Monooxygenase System in Rock Bream Oplegnathus fasciatus Exposed to Tributyltin (TBT)

Abstract

The study was conducted to investigate the responses of the hepatic microsomal cytochrome P450 monooxygenase system in the rock bream Oplegnathus fasciatus after chronic exposure to 0, 1, 2, 4, and 8 μg/L tributyltin (TBT) concentrations for 4 weeks. Hepatic cytochrome 450 content and ethoxyresorufin O-deethylation (EROD) activity were found to significantly increase in fish treated with the higher concentration of TBT (≥4 μg/L); however, no significant changes were observed in penthoxyresorufin Odeethylation (PROD) activity in all treated groups compared to the control group. These findings suggest that exposure to a low TBT concentration (≥4 μg/L) has the potential to induce cytochrome 450 content and EROD enzyme activity in hepatic tissue in the rock bream.

Dietary Effect of Probiotic Bacteria, Bacillus amyloliquefaciens-JFP2 on Growth and Innate Immune Response in Rock Bream Oplegnathus fasciatus, Challenged with Streptococcus iniae

“…However, high mortality of both juvenile and adult rock bream occurs in early summer when water temperatures increase to 16-19°C . With growing interest in culture of this species, there has been an increase in the number of published studies on nutrition of O. fasciatus (Kang et al, 1998;Wang et al, 2003;Kim et al, 2008;Hwang et al, 2013;Kim et al, 2013aKim et al, , 2013b however there is little information on feeding and dietary additives that promote the health status of this species (Ko et al, 2008;Lim et al, 2013). The present study was conducted to investigate the dietary effects B. amyloliquefaciens-JFP2 on growth, feed consumption, and innate immune response in probiotic fed juvenile rock bream, Oplegnathus fasciatus challenged with Streptococcus iniae.…”

Effects of Taurine Supplementation on the Growth Performance of Juvenile Rock Bream Oplegnathus fasciatus

“…In 2012, its aquaculture production in Korea was approximately 650 metric tonnes (MOMAF, 2014). In recent years, accompanying the growing interest in culturing this species, there has been an increase in the number of published studies on the nutrition of O. fasciatus (Kang et al, 1998;Wang et al, 2003;Kim et al, 2008a;Lim and Lee, 2009;Hwang et al, 2013;Kim et al, 2013aKim et al, , 2013b. However, to date, limited information is available on dietary additives that promote the growth of this species (Ko et al, 2008;Lim et al, 2013).…”