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Length-weight relationships (LWRs) and gut analysis of fresh water shark (Wallago attu) collected from local fish market of Quetta City, Pakistan

Samina Abdul Baqi, Wali Muhammad Achakzai, Kashif Kamran, Shagufta Saddozai

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J. Bio. Env. Sci.11(4), 114-120, October 2017


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Wallago attu (Bloch and Schneider, 1801) is a freshwater catfish of Siluridae family. A total of 250 including 159 female and 91 male samples were collected during the months of April 2016 till March 2017. The length of collected fishes was calculated 10.0-45.5 cm and weight ranged in 90-833g. The values of b for combined, female and male were 3.07, 3.15 and 3.11 respectively showed positive allometric growth in Wallago attu. All fish specimens dissected and examined their gut contents. The main gut contents were Chela phulo (20.51, 16.97), Puntinus sophore (15.21, 13.4), Labeo gonius (11.32, 9.51), Puntius ticto (10.64, 9.86), Glossogobius giuris (9.33, 8.74), Keratela (7.35, 6.95), Ambass nama (6.54, 5.87), miscellaneous (4.53, 8.94), crustaceans (4.51, 7.54), mollusks (3.97, 4.66), insects (3.82, 3.97), Plant matter (2.12, 2.83), and algae (0.51, 0.81) by volumetric and occurrence method. GaSI was classified as out of 250 18.01, 7.21, 34.02, 22.11 and 18.64 percent were empty, very less, half, quarter and full. The highest value of gut fullness was noticed in month of August, while lowest value was observed in July. In conclusion, Wallago attu showed positive allometric in growth and carnivorous in nature.


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Length-weight relationships (LWRs) and gut analysis of fresh water shark (Wallago attu) collected from local fish market of Quetta City, Pakistan

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