Merrett, N. R.2015-07-012015-07-011940East African Agricultural And Forestry Journal, VI (No. 2), p. 165-1690012-8325http://localhost:8080/dspace/handle/0/1609The East African Marine Fisheries Research Organization (E.A.M.F.R.O.) is at present conducting a tuna long line survey in the equatorial western Indian Ocean. During this survey, which began in September 1964, the weights and lengths of all specimens of scombroid species caught have been recorded. Sufficient data have now been collected from three species of tuna and two species of bill fish to enable the calculation of reliable weight length relationships.enhttp://creativecommons.org/licenses/by/3.0/Journal ContributionFishesSpeciesBillfishThunnus alalunga