Estructura de la comunidad ictioplanctónica en la laguna de Tamiahua, Veracruz, México

Tamiahua Lagoon is the third largest lagoon in Mexico. In the last decade their 2 inlets have been dredged and their jetties re-built to maintain constant communication with the sea, allowing the free flow of species. Zooplankton samplings were performed in 22 stations during the months of February, May, August and November of 2011, with a standard net of 500 microns. Simultaneously, salinity and surface temperature were measured. Forty species belonging to 37 genera and 19 families of fish were determined. Lutjanus campechanus, Chasmodes bosquianus, Ctenogobius shufeldti, Microgobius thalassinus and Citharichthys arctifrons are new records for this lagoon. The dominant species were Anchoa mitchilli, Lagodon rhomboides, Membras martinica, Lupinoblennius nicholsi, Ctenogobius boleosoma and Brevoortia gunteri. In February the species richness (26) was the highest one due to the entry of marine species, while diversity was low (2.13) due to the abundance of L. rhomboides, A. mitchilli and B. gunteri, of the group iv in the dendrogram of association of larvae. The larval composition from the Tamiahua lagoon presented a similarity of 61% when compared to previous years, before the dredging of the Tampachichi inlet.