Age composition and antioxidant enzyme activities in blood of Black Sea teleosts

Temporal variation in oxidative stress indicators in liver of totoaba (Totoaba macdonaldi) Perciformes: Sciaenidae

“…However, grouping by reproductive stage suggested that reproductively immature (FI, MI) totoaba had higher SOD activity than mature (FM, MM) totoaba. This could also be associated with age; Rudneva et al (2010) suggest three strategies in relation to enzyme activity vs age: (1) enzyme activity does not change with age, (2) it decreases with age, or (3) it increases with age. In the present study, mature (presumably older) totoaba had lower antioxidant enzyme activity; totoaba appear to fit within Rudneva et al (2010)’s option 2.…”

“…This could also be associated with age; Rudneva et al (2010) suggest three strategies in relation to enzyme activity vs age: (1) enzyme activity does not change with age, (2) it decreases with age, or (3) it increases with age. In the present study, mature (presumably older) totoaba had lower antioxidant enzyme activity; totoaba appear to fit within Rudneva et al (2010)’s option 2. Totoaba reach reproductive maturity at 1.3 m (female) and 1.1 m (male) (De Anda-Montañez et al , 2013); thus, in general, immature totoaba may be considered to be <5 years old, while mature totoaba were >5 years old.…”

Effect of dietary supplementation of probiotics and palm fruits extracts on the antioxidant enzyme gene expression in the mucosae of gilthead seabream (Sparus aurata L.)

“…Our results demonstrated that probiotics and palm date fruit extracts ameliorate enzymes' antioxidant status. Some previous studies have focused on examining the same enzymes as we analysed in fish, although the detected changes were related to age (oxidative stress has been reported to increase with aging) [51,52], to alteration in the antioxidant defence as part of the detoxification processes [53], to freshwater and seawater-adaptation [54] and, more recently, to metal exposure [55,56]. To our knowledge, there are no previous studies on the possible antioxidant effect of dietary probiotics or date palm fruit extracts in fish.…”

Variability of the hepatic α-amilase activities in the liver of fish species from the Sevastopol bays, Black Sea

“…It is obvious that digestive enzyme activity depends mainly on the formation of the digestive tract and feeding habits (Ugolev and Kuzmina, 1993;Gisbert et al 2009;Zacarias-Soto Barón-Sevilla and Lazo, 2013;Umalatha, Kushwaha and Gangadhar, 2016); however, it is already known that the impact of xenobiotics and natural particular features of fish and water areas affect the level of their activity (Kandyuk, 1966;Ferreira, Field and Tuttle, 2010;Sadhu et al 2014).…”

“…As far as Black Sea fish are concerned, such studies have been carried out previously on antioxidant enzymes and circulating immune complexes. It was found that the activation of protective systems is more pronounced in females at the high pollution level of Black Sea bays and in young and middle-aged individuals (Kuzminova, 2010;Rudneva, Kuzminova, Skuratovskaya and Kovyrshina, 2010;Kuzminova, Dorokhova and Rudneva, 2014a;Kuzminova, Kulakovskaya and Yakimova, 2014b). Therefore, it was interesting to analyze other biochemical parameters of the Black Sea fish with the aim of assessing their health and living conditions.…”