Study Of Morphometric Characters And Heavy Metals Detection In Knifefish (Notopterous Notopterous) Sampled From River Ravi, Pakistan

Abstract

Background: Notopterous notopterous belongs to catfishes and are 2^nd main group of freshwater fishes. Objectives: To measure morphometric characters and heavy metals in fish from River Ravi.

Methodology: Morphometric measurements was made by measurement tape and weight was calculated by digital balance. Heavy metals detection was also studied.

Results: It was found that, fish weight was 105.85±26.620 g, length with tail 21.03±1.60 cm, length without tail 19.30±1.5 cm. The distance in eyes was 1.47±0.30 cm, in nostrils 0.7±0.09 cm. Mandibles length was 2.59±0.30 cm, and maxilla 3.21±0.19 cm, diameter of eye 0.97±0.08 cm. Length of fins was also compared. The number of rays of different fins was also seen. The relationship between length and weight was discovered to be non-linear, and development was allometric. The concentration of Cd was more in Liver, Cr was more in Liver, Cu was more in Liver and Pb was more in Gills then other organs of the fish. Conclusions: Fish had large head region with various kinds of fins including dorsal fins and anal fins. Iron, cadmium, Copper, Chromium and lead in different organs were also seen and nickel was high in all organs of body except gills. Lead accumulates in the gills