Population Dynamics of the Tigertooth Croaker, Otolithes ruber in the Persian Gulf
Persian Gulf Fisheries Research Center, IRAN
THEME: ASFB
Growth parameters and mortality of the tigertooth croaker (Otolithes ruber) were estimated from length frequency data collected during trawl surveys in the Persian Gulf (Bushehr waters) from 1997-1998. LFDA and FiSAT programs were used for data analyses. Growth parameters were estimated as L„V=58cm and k=0.8 per year. The estimate of total mortality is Z=2.7 per year, giving a fishing mortality of F=1.46 per year and an exploitation rate of E=0.55. Natural mortality was estimated from the paulys formula (1980) which resulted in M=1.24 per year. Biomass estimation of swept area survey in 1994 was applied to calculate MSY. The MSY of Otolithes ruber is assessed between 145.8-154.4 tonnes. Results of the research indicate the fishery is operating very closed to its Maximum Sustainable Yield (MSY) level and that no further increase in fishing effort is advisable.
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