LENGTH-WEIGHT, LENGTH-LENGTH RELATIONSHIP AND CONDITION FACTOR OF AN ORNAMENTAL BARB LAUBUKA LAUBUCA (HAMILTON, 1822) FROM DIROI AND DISANG RIVER (TRIBUTARY OF BRAHMAPUTRA) IN UPPER ASSAM, NORTH EAST INDIA

Abstract

Length-weight and length-length relationships of Laubuka laubuca (Hamilton 1822) were studied from upper Assam, North East India. Condition factors were also calculated for both male and female for each standard length class. A total of 366 individuals (179 male and 187 female individuals) were collected between May, 2024 and August, 2025. Total length of males ranged between 3.1 and 6.3 cm with a mean length 5.15±0.586 cm while for females it varies between 3.4 and 6.5 cm with a mean length 5.16±0.685 cm. L. laubuca showed positive allometric growth pattern for both the sexes with length-weight relationship of  (for male) and  (for female) respectively. The length-length relationship between  and ,  and ,  and  displayed highly strong correlation ( ). The mean value for Fulton’s condition factor ( ), Allometric condition factor ( ) and Relative condition factor ( ) were 1.731±0.344, 1.440±0.288 and 1.021±0.204, respectively. The findings of this study will help to implement specific strategies for sustainable fisheries management of the species.