Length–length and length-weight relationships and condition factor of nine freshwater fish species of Nageshwari, Bangladesh

Abstract

The research carried out the length-length relationships (LLR), length-weight relationship (LWR) and condition factor of nine freshwater small indigenous species viz. G. giuris, E . Danricus, M . pancalus , L . guntea, C. fasciatus, P. sophore, H . Fossilis, C . punctatus and M. cavasius from the waterbodies of Nageshwari, Bangladesh. Relationships among different body lenght parameters of each species were found highly significant with all “r” values being >0.900. LWRs were obtained on the form of TW = aTL b . The “b” values range from 2.65-3.03. The parameter “b” of the length-weight relationship equation showed higher value (>3) only for G. giuris and C. fasciatus . Rest of the specimens showed lower value ( 9.00 . The Fulton’s condition factors showed positive growth tendency for five specimens viz. G. giuris, C. fasciatus, P. sophore, C. punctatus, M. cavasius; and negative tendency for four specimens viz. E . danricus, M . pancalus , L . guntea , and H . Fossilis .