Season-wise length-weight relationship and relative condition factor of Tenualosa ilisha (Hamilton, 1822) at Narmada estuary, Gujarat, India

摘要

Length-weight relationship and relative condition factor of T. ilisha was conducted for one year (2014-15) at Narmada estuary, Gujarat, India. Fish samples were collected from Bharuch, Bhadbhut, Mehgam and Ambetha landing sites covering 72 km of estuarine stretch. Two distinct fishing seasons were observed at Narmada estuary, viz., June-October and January-March, though the bulk of the harvest comes from monsoon season. A total of 312 fish samples were collected, 270 during monsoon and 42 during the winter season. The mean length and weight were recorded 35.37 +/- 11.36 cm and 625.83 +/- 39.81 g during monsoon and 36.84 +/- 3.82 cm and 537.44 +/- 17.45 g during the winter season. The 'b' value was found to be 3.07 and 2.76 and relative condition factor was 1.02 and 1.01 during monsoon and winter seasons, respectively.