Effect of maturation degree on fatty acid profile of different tissues in wild and farmed rohu (&lt;i&gt;Labeo rohita&lt;/i&gt;)

Bilal Hussain,Tayyaba Sultana,Shahid Nadeem,Muhammad Hassan,Shahid Mahboob

doi:10.3989/gya.090510

Abstract

During the breeding season, lots of physiological changes occur in the bodies of fish which lead to other phenotypical, anatomical and behavioral changes. To evaluate the impact of breeding on the bodily composition of fish, tests were conducted to determine the fatty acid profile of the brooder and Non-brooder wild and farmed fish. Samples were analyzed by gas liquid chromatography using a flame ionization detector.There are non significant differences in the amount of saturated and unsaturated fatty acids in wild and farmed nonbrooder fish whereas in case of brooder there are significant differences. Brooder farmed fish contained more saturates in gonads approximately twice that of wild fish with C16:0 as the dominating fatty acid. C18:2n-6 and C20:5n-6 were the dominating unsaturated fatty acids in the gonads. Non-brooder fish contained more unsaturated fatty acids in the meat as compared to the brooder fish and farmed fish contained higher amounts of saturated fatty acids as compared to wild fish. C18:1n-9 and C20:4n-6 fatty acids were found in higher quantities and among the saturated acids, C16:0 is the dominating one. More or less similar results were found in the case of the liver fatty acid profile of breeding and nonbreeding fish. Fish of lower weight categories contained more unsaturated fatty acids and so better for consumption to leave the brooders of higher weight categories for the breeding of future generation.

Highlights

Fish, whether, from the sea or from freshwater has been historically regarded as a simple and dependable quality food because it is an appropriate source of animal protein for more than half of the global population (Ling, 1977)
The data shown for the individual fatty acids of total lipids is limited to fish gonads, flesh and the liver of wild and farmed L. rohita of the two weight categories of brooder and non-brooder fish
Farmed fish contained more saturates in gonads approximately twice that of wild fish, C16:0 and C14:0 were the dominating fatty acids and showed a decreasing trend in higher weight brooder fish closely followed by C18:0 and C20:0 which showed increasing trends; while in the case of wild fish they showed decreasing trends

Summary

Introduction

Whether, from the sea or from freshwater has been historically regarded as a simple and dependable quality food because it is an appropriate source of animal protein for more than half of the global population (Ling, 1977). Cultured fish is currently considered one of the most promising sources of animal protein. The potential and prolific nature of cultured fish has been directed towards its large scale adoption and promotion in Asian countries. Fish has long been recognized as a valuable source of high quality food in the human diet. Fish lipids have assumed a great nutritional significance owing to their protective role against the development of cardiovascular diseases and rheumatoid arthritis (Shahidi and Boota, 1994). Fish is widely consumed by people in Pakistan, its consumption is still low

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