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Digestive Enzymes Activity with Gut Morphometric Parameter of Carnivorous Fish Wallago attu (Siluridae, Siluriformes)

Parsa Riaz and Muhammad Naeem*

Institute of Pure and Applied Biology, Bahauddin Zakariya University Multan, Pakistan.

 
*Correspondence | Muhammad Naeem, Institute of Pure and Applied Biology, Bahauddin Zakariya University Multan., Pakistan; Email: dr_naeembzu@yahoo.com

ABSTRACT

Present study attempted to determine the presence, distribution and levels of various digestive enzymes, such as lipases, proteases and amylases in the digestive tract of a wild, freshwater, carnivorous Wallago attu. Wallago attu is a fast growing catfish that belongs to family siluridae under the order siluriformes. It has good market demand as a food fish having high nutritional value, and high protein content in its flesh, Carnivorous in nature. Descriptive data of the studied traits included total body weight, total body length, gut weight, gut length, condition factor, standard length in Wallago attu. Fish body weight showed positive Pearson’s correlation with total length, gut weight, standard length and amylase enzyme. Fulton’s factor showed positive correlation with fish ZI, lipase and protease. ZI showed positive correlation with amylase and protease. Regression analysis of Protease has highly significant correlation with the entire factor except Total length. With the help of principle component analysis, fish weight was found another important trait would be investigated as dependent variable. These variables were selected on the basis of multicollinearity and principle component analysis interpretations. Present study mainly reported on overall activity of lipase, amylase and protease of Wallago attu. To the best of our knowledge, this is the first study on Wallago attu related to gut morphometrics that evaluated digestive enzymes with reported literature behalf of their species feeding habits. Gut morphometric parameters included first time in relation to Wallago attu morphology as Relative gut mass, length and Zihler’s Index are basically explored as potential indices to identify habits.

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Sarhad Journal of Agriculture

September

Vol.40, Iss. 3, Pages 680-1101

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