Monthly fluctuations of catch rates of three goatfishes species from Khor Al-Amayh, Northwest Arabian Gulf.

Abstract

The monthly fluctuations of catches per unit of effort of three goatfishes species from the Khor Al-Amayh, Northwest Arabian Gulf were studied from August 1999 to July 2000. The catches were varied from 11.55-32.50 Kg/hr for total catches, 1.90-7.15 Kg/hr for commercial fishes, 0.45-2.05 Kg/hr for the genus Upeneus, 0.45-1.50 Kg/hr for U. sulphureus, 0.10-0.45 Kg/hr for U. bensasi and 0.11-0.20 Kg/hr for U. tragula. The highest catch rates were recorded in summer and autumn. U. bensasi and U. tragula constituted 0.7% and 0.3% of the total catch, respectively, and disappeared from the catch during autumn and winter, whereas, U. sulphureus formed 13.6%. Water temperatures were ranged from 12.0Co in January to 38.7Co in July. Salinity was varied from 22.5 %o in March to 41.2 %o in August, however the light transparent fluctuated from 100 cm in March to 340cm in June. in which good positive correlations between the catches and the water temperature, salinity and light transparent were obtained. There are positive correlations between the catches and each of water temperature, salinity and light transparent.