Growth, body proximate composition and selected blood parameters of rainbow trout Onchorhynchus mykiss fingerlings fed on a diet supplemented with nettle Urtica dioica and tarragon Artemisia dracunculus. (10th July 2021)

• Record Type: Journal Article
• Authors: Zare, Mahyar; Mirzakhani, Mohammad Kazem; Stejskal, Vlastimil
• Is Part Of: Aquaculture research. Volume 52:Number 11(2021)
• Page Start: 5691
• Page End: 5702
• Publication Date: 2021-07-10
• Subjects: bioactive compounds -- feed conversion ratio -- leaf powder -- lysozyme activity -- survival rate -- weight gain; Aquaculture -- Periodicals; Fishery management -- Periodicals; 639.8
• DOI: 10.1111/are.15444
• Languages: English
• ISSNs: 1355-557X

Abstract

Abstract: Diet supplemented with nettle Urtica dioica and tarragon Artemisia dracunculus leaf powder on fingerling rainbow trout Oncorhynchus mykiss was assessed. Fish of initial body weight 7.41 ± 0.16 g, were distributed in six groups, three replications, and were fed 8 weeks. 0 (control), 10 nettle (N1), 30 nettle (N3), 10 tarragon (T1), 30 tarragon (T3) and 10 nettle +10 tarragon g/kg (N1+T1) diet. The N3 improved FBW, WG, WG% and SGR significantly ( p ≤ 0.05). N3 increased body protein, ash and decreased body fat significantly ( p ≤ 0.05). The highest haematocrit was observed in T3 significantly ( p ≤ 0.05). The highest WBC in T3, and RBC and Hb in N1+T1 were observed ( p ≤ 0.05). N1 and N1+T1 showed the highest MCV ( p ≤ 0.05). N1, T1 and N1+T1 showed the highest MCH ( p ≤ 0.05). The highest MCHC was observed in T1 significantly ( p ≤ 0.05). N3, T3 and N1+T1 demonstrated the highest albumin levels ( p ≤ 0.05). The T1 increased serum lysozyme activity compared to control ( p ≤ 0.05). The highest serum total immunoglobulin and total protein in N3 were observed ( p ≤ 0.05). The results showed beneficial effects of N3, T3 and N1+T1 on growth performance, body proximate composition and blood parameters.