Effect of Dietary Herbal Supplements on Some Physiological Conditions of Sea Bass Dicentrarchus labrax
2013
Yılmaz, Sevdan | Ergün, Sebahattin | Çelik, Ekrem Şanver
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 of 1.0% for thyme, rosemary, or fenugreek could improve some of the physiological parameters of Sea Bass. Thus, this work provides a new 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.
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