Length Frequency, Length-Weight and Relative Condition Factor of Ribbonfish, Lepturacanthus savala (Cuvier, 1829) from Karwar Waters, Karnataka State

Abstract

Length frequency, length-weight and relative condition factor of Ribbonfish, Lepturacanthus savala (Cuvier, 1829) from Karwar waters, Karnataka state was studied from December 2011 to December 2012 with the object of contributing additional information to the existing knowledge. Fish samples were collected monthly by random sampling method from fish landing centre Baithkol and Karwar fish market. Total 631 specimens ranging 100-630 were studied. Total length of fish was measured from tip of the lower jaw to the tip of the tail to the nearest mm; fish were weighed nearest to 0.1 grams by using, electronic weighing balance. The length measurements were converted in to length frequencies with constant class intervals of 50 mm. The mean lengths and weights were used for data analysis. Data for male and female fish were analysed separately. Values for 'a' and 'b' coefficients were calculated and the linear regression equations were obtained by using natural logarithmic transformations. The correlation r 2 was calculated by using linear regression analysis. The relative values for Kn was determined by using equation. Obtained values for Kn were ranged between 0.9 to 1.18 for males and 0.8 to 1.16 for females.