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Free Content Some Aspects of the Biology of the Rhomboid Mojarra Diapterus Rhombeus in Puerto Rico

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The rhomboid mojarra, Diapterus rhombeus Cuvier, is a fish commonly found over soft bottoms in southwestern Puerto Rico. The spawning season is protracted, lasting from January through September, and the age at maturation is 11 to 13 months. Growth is linear in juvenile fish up to 70 mm (7 months). Their average rate of growth is 10 mm/month. Fish 70-100 mm long (12 months) grow at an average rate of 9 mm/month. After one year, growth drops off to 5 mm/month. The diet consists of plants, pelecypods, crustaceans, and polychaetes; mud also comprises a very large percentage of the stomach content. Growth and changes in the seasons are reflected by changes in the diet.

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Document Type: Research Article

Publication date: 1971-12-01

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