Blood Chemistry and Histological Properties of Wild and Cultured Sea Bass (Dicentrarchus labrax) in the North Adriatic Sea

Abstract

Histological and biochemical procedures were employed to study liver histomorphology and plasma levels of aspartate aminotransferases (AST), alanine aminotransferase (ALT), triglyceride (TRIG), cholesterol (CHOL), glucose (GLU) and total protein (TP) in cultured (CSB) and wild sea bass (WSB) (Dicentrarchus labrax) from the northern part of the Adriatic Sea. Histopathological changes in liver included varying degrees of infiltration and lipid degeneration of hepatocytes in examined cultured fish. No significant differences between median AST values of CSB (44 IU) and WSB (45 IU) were observed. Values of ALT were <5 IU in both groups. TRIG, CHOL, GLU and TP levels were higher in CSB (2.08 mmol/L, 3.67 mmol/L, 10.66 mmol/L and 49 g/L, respectively) than in WSB (0.67 mmol/L, 2.74 mmol/L, 3.68 mmol/L and 36 g/L, respectively). The study showed differences between plasma biochemical parameters and liver histomorphology of CSB and WSB. This can be explained as a consequence of different diets (artificial in contrast to natural foods), which influence energy metabolism.

Haematology and biochemical parameters of different feeding behaviour of teleost fishes from Vellar estuary, India

“…An increased blood glucose and protein level was recorded in L. calcarifer, this may probably be due to an increased depletion of liver glycogen (Ojolick et al 1995). Our findings confirm those of Coz-Rakovac et al (2005) who reported a significantly elevated glucose level in farmed Dicentrarchus labrax as compared to the wild ecosystem. Strange (1980) also reported that blood glucose level may decrease with increasing water temperature in channel catfish.…”

“…Strange (1980) also reported that blood glucose level may decrease with increasing water temperature in channel catfish. Blood glucose level may vary according to season and water temperature, and glucose concentration in fish decreases with age and size (Coz-Rakovac et al 2005). The increased plasma protein concentration can be caused by structural liver alternations that reduce aminotransferase activity, with concurrent reduction in deamination capacity (Kavadias et al 2004).…”

“…The levels of cortisol and glucose are considered to be specific indicators of sympathetic activation during stress conditions (Lermen et al 2004). Basic ecological factors, such as feeding regime and stocking density, also have a direct influence on certain biochemistry parameters (Coz-Rakovac et al 2005). To date, however, data reported in the literature refer mainly to acute stress status in different farmed fish species and there have been an insufficient number of studies on the comparative haematological differences between different feeding behaviour of fish that share the same ecological zone.…”

Some Blood Biochemical Changes in Response to Saline Exposure in the Fresh Water Fish, <i>Notopterus notopterus</i> (Pallas)

“…The control fish serum protein was 6.23g/dl and (experimental fish) fishes exposed to 0.16% was 8.43 gm/dl. According to Rakovac et al, (2005), increased concentrations of total protein can be caused by structural liver alterations reducing aminotransferase activity impaired control of fluid balance. Serum Kuck et al, (2012), also reported that there was increase in total protein as salinity increases.…”

Seasonal Variations in Serological Profiles and Growth Status of Farmed and Wild Clarias gariepinus (Burchell, 1822) Obtained from Asaba, Nigeria

“…Bender et al [17] reported that small differences in body size do not result in significant changes in cortisol production and metabolism, which are related to elevated levels of cholesterol. Xu and Cao [18] and Coz-Rakovae et al [19] also reported the elevated levels of cholesterol in farmed fishes. Furthermore, Yousafzai and Shakoori [20] reported that aquatic pollution leads to the elevated tissue cholesterol in fish.…”