Effect of Dietary Herbal Supplements on Some Physiological Conditions of Sea BassDicentrarchus labrax

Abstract

This study was conducted in order to investigate the effects of dietary thyme Thymus vulgaris, rosemary Rosmarinus officinalis,and fenugreek Trigonella foenum graecum as feed additives on total liver fat levels and biometric indices of Sea Bass Dicentrarchus labrax. Four isonitrogenous (48% crude protein) and isocaloric(21 kJ/g) diets were formulated to contain 0% (control), or 1% of thyme, rosemary, or fenugreek. In a 45-d feeding trial, 12 fiberglass tanks (140 L) were each stocked with 17 fish (20.43 ± 0.03 g).Herbal supplemented diets significantly decreased the total liver fat, visceral fat index, viscerosomatic index, hepatosomatic index,and increased the spleen–somatic index and bile–somatic index(P<0.05). In conclusion, the results indicated that a dietary level of1.0% for thyme, rosemary, or fenugreek could improve some of the physiological parameters of Sea Bass. Thus, this work provides anew perspective for the use of medicinal herbs that can be added to fish feed to improve the status of fish organs. Thyme, rosemary, and fenugreek contain a number of different active components, which possibly play an important role in improving these conditions, but the mechanism by which this is achieved needs further and more detailed study.

Effect of oregano (Origanum onitesL.) essential oil on growth, lysozyme and antioxidant activity and resistance againstLactococcus garvieaein rainbow trout,Oncorhynchus mykiss(Walbaum)

“…The use of plant products in diets for fish is very topical concept in aquaculture (Citarasu ; Yilmaz & Ergun ; Ahmadifar et al . ; Gormez & Diler ; Metin et al .…”

Effects of dietary humic acid on growth performance, haemato-immunological and physiological responses and resistance of Rainbow trout,Oncorhynchus mykisstoYersinia ruckeri

“…Commercial test kits (Bioanalytic Diagnostic Industry, Germany) were used to determine the serum glucose, total protein, albumin, globulin, triglyceride, cholesterol, glutamic oxaloacetic transaminase (GOT), glutamic pyruvic transaminase (GPT), lactate dehydrogenase (LDH) and alkaline phosphatase (ALP) levels (Yilmaz & Ergun, ). Serum biochemical analyses were carried out on a spectrophotometer (Optizen POP UV/VIS).…”

Influence of Tribulus terrestris extract on the survival and histopathology of Oreochromis mossambicus (Peters, 1852) fry before and after Streptococcus iniae infection

“…However, antibiotics may facilitate the development of antibiotic‐resistant strains of bacteria (Zilberg et al., ). In recent years, herbal supplements have been used in place of antibiotics in aquaculture, and is considered a more environmentally friendly approach to disease management (Harikrishnan et al., ; Yilmaz and Ergün, ) that enhances immunity and resistance to pathogens (Ergün et al., ; Yilmaz et al., , ,b).…”