A Study on Stocks of Five Tuna Species in Hormuzgan Province Waters 1397-99

Abstract

Studying and analyzing traditional & industrial data and biological factor estimation of five tuna species (LOT, KAW, FRI, YFT, SKJ,) in Hormuzgan province in 1377 and 1378 execute-l the quota of traditional catch section is 1377 is 14087 tonnes constitute 76% LOT KAW, FRI, 2.2% and in 1378 is 16384 tonnes constitute LOT, KAW, 2.2% FRI and 027% Y FT. Most of them caught by drift gillnet. The quato of SKJ in these year is less than 500 kg. The quota of industrial catch section belonging to purse-seiners Azadegan I & 2 in1377 is 1699 tons constitute 47% LOT, 42% YFT, 11% other species and in 1378 is 21 13 tons constitute 62% LOT, 37% YFT, 0.5% SKJ and 0.5% other species. Catch rate of these purse-seiners are 9.3 in 1377 and 10.4 in 1378 tons per fishing days. Biological parameters (K, In, M, F, Z, E) and relationship between fork length-weight & Gill girth-fork length were estimated annually. Major spawning season of LOT obtained in summer with a peak in mordad.