Length-Weight Relationship and Condition Factor of Notopterus notopterus (Pallas, 1769) from Manchar Lake Sindh, Pakistan

Abstract

Notopterus notopterus is commercially important fish and having enormous potential for its nutritive and therapeutic qualities. No attempt has yet been made to determine length-weight relationships in Pakistan. Present study describes the length– weight relationships (LWRs) for N. notopterus from Manchar Lake Sindh, Pakistan for the first time. Fish samples were collected from August 2011 to July 2013 at Manchar Lake District Jamshoro Sindh, Pakistan. A total of 309 specimens (162 males and 147 females) were collected randomly which ranged between 10-30 cm in Total Length (TL) and weight 16.5- 290 g. Length-weight relationship equation was calculated as Log W= 0.0101L3.0069 (combined population) Log W= 0.0100L3.0069 (male population) and Log W=0.0101 L3.0066 (female population). The relative condition factor (Kn) values ranged for combined population 0.86 -1.31 (Mean 1.0101±0.15), for male 0.87- 1.29 (Mean 1.0100 ± 0.15) and females 0.85 – 1.33 (Mean 1.0100 ±0.15). The Length-weight relationship and condition factor shows that the growth of N. notopterus is isometric and satisfactory. This is the first report on lengthweight relationships and condition factor of N. notopterus from Pakistan.