Length Frequency Distribution of (Chrysichthys nigrodigitatus) (Lecepede, 1803) (Chrysichthys, Bagridae) from Itu Head Brigde, in Akwa Ibom State, Nigeria

Andem A. B, George U. U, Eyo V. O

Abstract: The length frequency distribution of (Chrysichthys nigrodigitatus) was investigated using 496 specimens between June, 2012 to January, 2013 and these specimens were obtained from the artisanal catches landed at Itu Head Brigde, Cross River System. The highest frequency distribution occurrence 38 (Number) throughout the study period was recorded in the month of September, 2012. The length-frequency distribution throughout the study period shows a prominent peak with a preponderance total length range of 40-49cm over others except for January, 2013 which the prominent peak with a prepondence total length range of 50-59cm over others. During the study period, it was observed that the length distribution of (Chrysichthys nigrodigitatus) could have management implication for resource sustainability. However, further research is needed in this area using selective gears to determine and establish the true picture of the length frequency distribution of (Chrysichthys nigrodigitatus) in Itu Head Bridge, Cross River system.

Keywords: Growth, Maturity, Spawning, Feeding ground, Cross River System