Alternate Title

A Study on the Growth Rate of Brown Shrimp (Penaeus aztecus aztecus Ives, 1891) from the Coasts of Veracruz and Tamaulipas, Mexico

Document Type



The present study was undertaken with the purpose of getting the proper basis for exploiting brown shrimp resources in a rational manner, by introducing control regulations of fishing activities. The growth rate models are necessary for the other parameters of population dynamics of the stocks of this species, whose annual catch, Osborn, Maghan and Drummond (1969), averages 54 million pounds of tail weight, representing 52% of the total shrimp caught in the Gulf of Mexico. This shows that Penaeus aztecus aztecus is the most important of shrimp species exploited in this region. Nevertheless, the brown shrimp is the least well known of the three most common species.

The growth rate was determined by fitting the von Bertalanffy growth curve to offshore populations, on which according to Cook and Lindner (1970), there are no published data, although an unsuccessful attempt was made by Klima (1964). Published data are only from inshore waters (Williams 1955, Loesch 1965, Joyce and St. Amant et al., from Cook and Lindner 1970).

Statistical calculations of length-weight and total length-tail length ratios were required before available raw data could be used in growth analyses. Tesch (1968), points out that age data, along with length and weight measurements represent the basis for information on growth, composition of stocks, maturity age, life span, mortality and production.

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