PROXIMATE COMPOSITION OF FRESHWATER RAINBOW TROUT (Oncorhynchus mykiss) IN RELATION TO BODY SIZE AND CONDITION FACTOR FROM PAKISTAN

Abstract

Eighty four farmed Rainbow trout, Oncorhynchus mykiss ranging from 4.8-38.5cm total length and 1.11-725.00g body weight were collected for analyses of its body composition from Trout Hatchery, Masote near Kali Matti, Murree and Madian, Swat. The condition factor value of O. mykiss ranged from 0.831 to 1.607. The mean percentage of water was found 77.82%, for ash 12.77%, for fat 22.79% and for protein content 64.42% in whole dry body weight of O. mykiss. Results showed that there was a strong correlation (P<0.001) in each of these body constituents (water, fat, protein and ash) with body size, weight and condition factor of the fish. Thus, with increasing body size, fat and protein contents increased in greater proportion, while ash and water percentage decreased. An inverse correlation was found in water and ash percentages, whereas percentage fat and protein showed positive correlation with condition factor.

Effect of Different Dietary Levels of Protein on the Proximate Composition of Genetically Improved Farmed Tilapia (GIFT) from Pakistan

“…The relationship between log transformed data of wet body weight as well as total length versus total water content (Tables 3 and 4) exhibited strong correlation (P<0.001) for T1, T2 and T3. These findings are supported by Naeem and Salam (2010) in bighead carp, Naeem et al (2011a) in Catla catla × Labeo rohita hybrid, Naeem and Ishtiaq (2011) in Mystus bleekeri, Naeem et al (2016) in rainbow trout, Khalid and Naeem (2018) in Ctenopharyngodon idella and Bano et al (2019) in L. calbasu reported similar results.…”

Growth performance, haematological parameters, antioxidant status and salinity stress tolerance of juvenile Pacific white shrimp (Litopenaeus vannamei ) fed different levels of dietary myo -inositol

“…Jiang et al. (,b) and Naeem, Salam, and Zuberi () demonstrated that the values of body composition presented the semblable variation trend with the values of body size, weight gain, condition factor, protein efficiency ratio and protein productive value in fish. There is a strong correlation between the changes in body composition and the variation trend of growth (Naeem & Salam, ; Weatherley & Gill, ).…”

Effect of Different Dietary Protein Levels on Proximate Composition of Labeo Calbasu From Pakistan

“…To calculate lipids, methodology of Bligh and Dyer [10] was applied, by using a mixture of chloroform and methanol in a Protein contents in L. calbasu samples were assessed by subtracting the weight of other major contents (ash, water, fat) from total weight of fish, following [5,6].…”

“…This also guarantees the fine meat quality and flavour [4]. However, proximate composition may vary with size [5,6], season [7] and dietary protein levels [8].…”