Resumen. En esta investigación se presenta un nuevo algoritmo de esteganografía para imágenes, utilizando la sustitución de los bits menos significativo y la regla local 90 de autómatas celulares. Este algoritmo es capaz de cifrar y ocultar los pixeles de la imagen en un proceso combinado. El factor PSNR indica que no existe una distorsión severa en la imagen esteganográfica, lo que en esta área se interpreta como a menor distorsión de la imagen esteganográfica, mayor es la probabilidad de pasar desapercibida y que no sea analizada. Sin embargo, en caso de que la imagen oculta sea extraída, ésta se encuentra protegida por una clave secreta. Este algoritmo transforma la imagen secreta a una imagen cifrada con distribución uniforme y sin correlación. Este algoritmo esteganográfico puede ser una nueva opción para ocultar y proteger imágenes relacionando ambos procesos.
lagoons located in the northern part of the Yucatán Peninsula is presented. Sampling was carried out for 5 minutes using a zooplankton net for larvae, while a Renfro net was hauled for 50 m 2 to capture juveniles. This work aims to provide the current state of the taxonomic composition and general distribution for 34 377 fi sh larvae and juveniles. Our samples represent 2 classes, 17 orders, 45 families, 83 genera and 117 species were caught, including 39 new records, where 24 have been found only in the Gulf of Mexico, 3 in the Caribbean Sea, and 90 are common to both regions. This study updates and increases the number of species in larval and juvenile stages previously reported. It was found that early reef larval stages were more abundant towards the East of the Yucatán Peninsula and less to the West. The high number of shared species (90) suggests that the northern region of the Yucatán Peninsula is a transition zone for fi sh larvae and juveniles between the Gulf of Mexico and the Caribbean Sea.
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