Transport of Farfantepenaeus Aztecus Postlarvae in Three Lagoon-System Inlets in the Southwestern Gulf of Mexico

Abstract

[This study evaluates the night-time recruitment of Farfantepenaeus aztecus postlarvae and its relation with temperature, salinity, and velocity and flow direction of the current in the artificial inlet of the Camaronera lagoon of Alvarado, Veracruz, the Soto la Marina river inlet of Tamaulipas, and the Puerto Real inlet of Terminos lagoon, Campeche. Sampling was done during the night. A conical 243 μm mesh net was used for capture. The total catch of F. aztecus for the three coastal systems was 95,279 postlarvae. The average temperature was 28.23 ± 1.37°C, salinity 23.54 ± 7.10 psu, and stream velocity 0.39 ± 0.18 m s–1. During this study, the existence of recruitment peaks between 20:00 h and 02:00 h was established. The correlation coefficient between the density of postlarvae in the hours of sampling and environmental factors was significant (P 23 psu. Recruitment is related to the influx of seawater towards the coastal systems. There was no significant difference in postlarval density (P > 0.05) between consecutive sampling cycles. En este estudio se evaluo el reclutamiento de las postlarvas de Farfantepenaeus aztecus y su relacion con la temperatura, salinidad, velocidad y direccion de la corriente en la boca de comunicacion artificial de la laguna Camaronera de Alvarado, Veracruz, la boca del rio Soto la Marina, Tamaulipas y la boca de comunicacion Puerto Real de la laguna de Terminos, Campeche. Los muestreos se realizaron durante la noche. Para las capturas se utilizo una red conica de 243 micras de abertura de malla. La abundancia total de F. aztecus para los tres sistemas fue de 95 279 postlarvas. El promedio de temperatura fue de 28,23 ± 1,37°C, salinidad de 23,54 ± 7,10 ups y velocidad de corriente de 0,39 ± 0,18 m s–1. Durante la realizacion de este estudio se presentaron los picos de reclutamiento entre las 20:00 h y las 02:00. El coeficiente de correlacion entre la densidad de postlarvas y los factores ambientales fue significativo (P 0,05) entre los ciclos de muestreo consecutivos., This study evaluates the night-time recruitment of Farfantepenaeus aztecus postlarvae and its relation with temperature, salinity, and velocity and flow direction of the current in the artificial inlet of the Camaronera lagoon of Alvarado, Veracruz, the Soto la Marina river inlet of Tamaulipas, and the Puerto Real inlet of Terminos lagoon, Campeche. Sampling was done during the night. A conical 243 μm mesh net was used for capture. The total catch of F. aztecus for the three coastal systems was 95,279 postlarvae. The average temperature was 28.23 ± 1.37°C, salinity 23.54 ± 7.10 psu, and stream velocity 0.39 ± 0.18 m s–1. During this study, the existence of recruitment peaks between 20:00 h and 02:00 h was established. The correlation coefficient between the density of postlarvae in the hours of sampling and environmental factors was significant (P 23 psu. Recruitment is related to the influx of seawater towards the coastal systems. There was no significant difference in postlarval density (P > 0.05) between consecutive sampling cycles. En este estudio se evaluo el reclutamiento de las postlarvas de Farfantepenaeus aztecus y su relacion con la temperatura, salinidad, velocidad y direccion de la corriente en la boca de comunicacion artificial de la laguna Camaronera de Alvarado, Veracruz, la boca del rio Soto la Marina, Tamaulipas y la boca de comunicacion Puerto Real de la laguna de Terminos, Campeche. Los muestreos se realizaron durante la noche. Para las capturas se utilizo una red conica de 243 micras de abertura de malla. La abundancia total de F. aztecus para los tres sistemas fue de 95 279 postlarvas. El promedio de temperatura fue de 28,23 ± 1,37°C, salinidad de 23,54 ± 7,10 ups y velocidad de corriente de 0,39 ± 0,18 m s–1. Durante la realizacion de este estudio se presentaron los picos de reclutamiento entre las 20:00 h y las 02:00. El coeficiente de correlacion entre la densidad de postlarvas y los factores ambientales fue significativo (P 0,05) entre los ciclos de muestreo consecutivos.]