author(s)
Hafiza Nimra Ghani Qureshi, Ruqia Bibi, Najam-un-Nisa, Sania Komal and Inam Ullah

abstract
Cirrhinus mrigala is a vital protein source. The present study was conducted to observe the relationship between selected visceral organs and the bodyweight of Cirrhinus mrigala (Hamilton 1822) from Indus River Dera Ismail Khan from March 2021 to May 2021. Samples of Cirrhinus mrigala were collected weekly. Fish was weighted in kg on digital balance, and length (in cm) was determined using the scale, and samples were preserved in 10% formalin solution. Selected visceral organs are removed and weighed on digital balance in grams. The relationship was obtained between body weight, body length, gonad weight, intestine weight, liver weight, swim bladder weight, and total visceral weight. A positive, highly significant correlation was observed among body weight, body length, intestine weight, swim bladder weight, and total visceral weight, but a positive and significant correlation was found between gonad weight and liver weight of Cirrhinus mrigala. A good correlation (0.75-0.9) was found between body length and intestine weight, body length and liver weight, body length and total visceral weight, gonad weight and total visceral weight, intestine weight and liver weight, intestine weight and swim bladder weight, intestine weight, and total visceral weight, liver weight and swim bladder weight, swim bladder weight and total visceral weight with the value of 0.938**, 0.974**, 0.814**, 0.895**, 0.891**, 0.945**, 0.949**, 0.978**, 0.811** respectively, poor correlation (0.25-0.5) was observed between gonad weight and body length, gonad weight and liver weight, gonad weight and swim bladder weight with the correlation value of 0.492**, 0.335*, 0.474** respectively. Present studies will provide a basis for further advanced research in the future in the same field.