en Ecology Ecology پژوهشي Orginal research papers Volatile organic compounds in farmed and wild rohu, <em>Labeo rohita</em>, were extracted by Likens-Nickerson concurrent distillation apparatus. The farmed raised rohu of two weight categories designated as FW₁ (1001-1200g) and FW₂(501-700g) were procured from the Fish Seed Hatchery, Faisalabad. Concurrently, wild rohu of two weight categories designated as WW₁ (1001-1200g) and WW₂(501-700g) were captured with gillnet from the Trimu Head. Quantitative and qualitative estimation was made by gas chromatography. In farmed and wild <em>L. rohita</em> of the weight group FW₁ and WW₁, 14 and 6 volatile compounds were extracted, respectively. In weight group FW₁, six compounds were identified as 3-methyl-1-butanol, 3-hexene-1-ol, heptanal, 3-octanol, decanal and 2-undecanone. In weight group WW₁, out of six compounds three were identified as heptanal, 1-octen-3-ol, 2-nonanone. In weight categories FW₂ and WW₂, 14 and 13 volatile compounds were detected, respectively. In weight category FW₂, out of 14 compounds, 3-hexene-1-ol, heptanal, 3-octanol, 2-undecanone and decanal were identified. In weight category WW₂, out of 13 compounds, 7 were identified as 3-methyl-1-butanol, 2-heptanone, heptanal, 3-octanol, 2-nonanone, decanal and 2-undecanone. The analysis of variance for retention time and concentration of volatile compounds showed no significant difference (p>0.05). The correlation coefficient between retention time and concentration was significant (p< 0.05). Farmed rohu, Wild rohu, Volatile organic compound, Retention time, Labeo rohita 65 72 http://jifro.ir/browse.php?a_code=A-10-600-96&slc_lang=en&sid=1 S. Mahboob rsmahboob1@yahoo.com 100319475328460024124 100319475328460024124 Yes M. Hussain 100319475328460024125 100319475328460024125 No Z. Iqbal 100319475328460024126 100319475328460024126 No S. Nadeem 100319475328460024127 100319475328460024127 No