author(s)
Mandakini Deuri, Bhargav Bhushan Nath, Abdul Malik Ahmed, Jiten Sarma, Bipul Phukan, Ayub Ali, Rinku Gogoi, Imtiaz Ahmed and Dharitri Baruah

abstract
The present study was carried out to established the relationship of total length and total weight, the relationship of total length (TL), standard length (SL), and fork length (FL) and also condition factor of native fish species Labeo bata from Kolong River of central Brahmaputra valley of Assam. A total of 334 specimens were collected for this present study from May 2018 to April 2019. The length-weight relationship (LWR) was calculated separately with male, female, and pooled data and growth was shown negative allometric (b<3). The length-length relationship (LLR) showed a linear significant relationship between total length and standard length, total length and fork length and standard length and fork length. Information on the length-weight relationship, length-length relationship and condition factor of Labeo bata from central Brahmaputra valley are quite limited. There is no such information of LWRs, LLRs, and condition factor of this fish species from this area so this result which would be helpful for scientific and sustainable management of Indian minor carp fisheries in the Kolong River of central Brahmaputra valley of Assam.