The Substitution of Mustard Oilseed Cake (Brassica napus) for Poultry Flour in Snakehead Fish Channa gachua

Author: Ali Akshad M., Ashique P.A., Mohamed Munawwar and Rasha Naureen

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Abstract

In most of the countries around the world, supplemental feeding is a crucial technique for fish farming. Supplemental feeds like groundnut cake, mustard cake, cotton seed cake, and other oil cakes mixed with rice bran or wheat bran are frequently used. The major components of artificial feed, which are typically provided, are byproducts of various agricultural commodities, including vegetables, oil cake, rice, wheat bran and husk, etc. In order to maximize fish productivity and save costs, nutrient-balanced fish feed must be developed using materials that are readily available regionally. One such widely available fish feed is the oil extracted from the mustard seeds. Following the extraction of oil from mustard seeds, mustard oil cake is produced as a byproduct. These oilcakes are employed as feedstock in the manufacturing of supplemental aquafeed in industrial settings. Depending on the various growth environments and processing techniques, the chemical makeup of mustard cake changes. From June 2018 to May 2019, mustard (Brassica napus) oilseed cake was used in place of poultry meal when feeding snakehead fish. In this fish culture, it served as the primary source of protein. The live weight gain, feed conversion rate, protein efficiency ratio, and specific growth rate of fish were assessed in three groups fed diets T0, T1, and T2, respectively. The fish in group T3 saw a considerable drop in their growth indices, including a poor feed conversion rate (3.64±0.05), a low protein efficiency ratio (0.94±0.03), and a low specific growth rate (2.89±0.05). While fish from groups T0, T1, and T2 all exhibited roughly comparable levels of protein in their bodies, fish from group T3 (P<0.05) shown a substantial drop. Low body fat was evident at the level of total substitution of chicken offal meal with mustard oilseed cake (P < 0.05). Although being much greater in fish fed the T3 diet, The diets T0, T1, and T2 did not substantially differ from one another in terms of moisture content (P > 0.05). Fish fed diets T0, T1, and T2 revealed notable variations in body ash content (P>0.05), but fish in the T3 group had a considerably higher level of body ash level. The use of mustard oil cake in place of poultry offal meal had a substantial impact on the histosomatic index, viscerosomatic index, and condition factors (P<0.05). The replacement level of T2 was noted to be unaltered, however considerable modifications were found in the levels above T2.

Keywords

Brassica napus, Channa gachua, Artificial Diet, Histosomatic Index, Viscerosomatic Index

Conclusion

The majority of the experimental fish’s growth, performance, and feeding effectiveness were unaffected by the partial substitution of poultry meal for dietary fishmeal. Low digestibility is caused by the poultry meal's high ash content. The mustard cake contains a high level of toxic substances, including glucosinolates, flavinoids, cyanoalanine, cyanogenic glycosides, etc. The toxic components in the mustard oilseed cake may have an impact on the fish's capacity to reproduce, grow, and taste good, among other things.

References

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How to cite this article

Ali Akshad M., Ashique P. A., Mohamed Munawwar and Rasha Naureen. (2023). The substitution of Mustard Oilseed Cake (Brassica napus) for poultry flour in Snakehead fish Channa gachua. Biological Forum – An International Journal, 15(3): 294-297.