BEBERAPA ASPEK BIOLOGI IKAN SEMBILANG (Plotosus canius) DI PERAIRAN LANGSA

Abstract

Sembilang ( Plotosus canius) is among favored consumption fish by coastal community. This study was conducted to analyze some biological aspects of sembilang fish in the Langsa waters. A total of 100 fish were observed (78 males and 22 females). Observations were made on the relationship between length and weight, condition factors, and gonad maturity level. Based on the results of the study, it showed that the male were in the range of 26 - 39 cm and weight 95 – 280 gr. Whereas females were 28 – 36.3 cm and weigt of 117-214 gr. The length-weight relationship has a negative allometric growth pattern where the value of b = 2.582 for males and b = 1.526 for females with a correlation is getting closer to 1 indicating the pattern of length growth is always followed by weight gain ( r = 0.88) for males, and (r = 0.71) for females. The average value of the male and female condition factors is 1.1048 and 1.0102, indicating that the male condition is better than the female. It was found that the level of maturity of the gonads I and II was found at different body sizes.