Logistic regression analyses showed that the maturity v. length relationship for female English sole Pleuronectes vetulus varied significantly among sampling locations from California to British Columbia in June-September. Stepwise analyses found that latitude, bottom gradient, bottom temperature and sediment type were all significant factors. Regression analyses of age at length from subsamples indicated that latitude, maturity and bottom sediment had significant effects on growth. Data from the aged subsamples showed significant differences among age classes in the length v. maturity relationship with older fish attaining maturity at smaller sizes than younger fish. On a coastwide basis the length and age at 50% maturity were c. 230 mm and 4·7 years respectively. Growth rate and length at 50% maturity have decreased substantially relative to observatons from the 1950s, but age at 50% maturity has increased. 1999 The Fisheries Society of the British Isles

This article attempts to estimate the loss in economic activity to the Oman economy resulting from exporting unprocessed fish. Because of the lack of data to compute the necessary multipliers, we use multipliers from other sources. Results show that if fish exported between 2003 and 2007 had been processed in Oman, 479.7 to 829.5 million Rials in economic activity could have been generated. Furthermore, between 2003 and, if all the unprocessed fish exported had been processed locally, between 0.874 and 1.818 billion Rials increase in income could have been generated, with an additional income of up to 1.594 billion Rials through induced effects. Also for every person the fish processing industries could have employed (if all fish processing took place locally) between three to five jobs could have been created economy wide. These results, however, must be taken only as broad indicators because of the lack of multiplier data in Oman.

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