Abstract

The white shrimp is one of the most important fishery resources of the coasts of Campeche, its catches are carried out offshore sea but also in the coastal lagoons as Terminos Lagoon. Due to high productivity and type of life cycle of this specie, in this lagoon are found the juveniles that stay until to bave necessary age to migrate to high sea and reproduced. The environmental factors that influence shrimp abundance and distribution are analyzed in this work during October of 1997 to March of 1999. There are observed a strong seasonal pattern, where the largest abundance (number of individuals) is presented during rains season (June to July) and storms season (November). The spatial distribution of the white shrimp showed the most concentration at southwest region of the lagoon, as was reported in the studies of the years 70's and SO's. This distribution was associated with freshwater contribution, slimy sediments and absence of submerged vegetation. Not relationships between physico-chemistry parameters were found directly with the abundance of the white shrimp. It is probably that the effect joint of such variables has a larger influence on the abundance. There are observed a decrease between the maximum density values (0.25ind/m2) obtained in this study, with respect in comparison with reported by Gracia (1989), density = 1.10 ind./m2. Duration of this work does not permit to explain the decrease of the reported density, woold be convenient to support a permanent monitoring of environmental variables and human impacts.

PDF Preview