Abstract
Samplings with plankton net, cast net and otter trawl were made every two weeks to estimate the distribution and abundance of Penaeus shrimp postlarvae and juveniles in Kino Bay (IX/89-IX/90) and La Cruz coastal lagoon (VII/89-IV/91), Sonora, Mexico. The postlarvae were present from June to November, with maximum average abundance in July 1990: 220.58 postlarvae/10 m3 in La Cruz and 72.5 postlarvae/10 m3 in Kino Bay. Penaeus califoniensis was the most dominant species. There was no statistical evidence of postlarva aggregation at the sampling stations. Only juveniles of P. califoniensis (brown shrimp) and P. stylirostris (blue shrimp) were caught, dominating the first. The maximum total length of juveniles was 13 cm (brown shrimp) and 16 cm (blue shrimp). From length data, we believe that brown shrimp enter La Cruz at an earlier developmental stage than blue shrimp.
Highlights
Se realizaron arrastres de plancton superficiales, lances con atarraya y arrastres con red de fondo de puertas cada quince días para estimar la distribución y abundancia de las postlarvas y juveniles de los camarones del géneropenaeus en Bahía Kino (1X/89-1X/90) y la laguna costera La Cruz (VII/89-IV/91), Sonora
We believe that brown shrimp enter La Cruz at an earlier developmental stage than blue shrimp
Plankton samplings were made at La Cruz coastal lagoon and Kino Bay to catch shrimp postlarvae
Summary
Se realizaron arrastres de plancton superficiales, lances con atarraya y arrastres con red de fondo de puertas cada quince días para estimar la distribución y abundancia de las postlarvas y juveniles de los camarones del géneropenaeus en Bahía Kino (1X/89-1X/90) y la laguna costera La Cruz (VII/89-IV/91), Sonora. Las postlarvas estuvieron presentes entre los meses de ‘unio a noviembre, con la máxima abundancia promedio en julio de 1990: 220.58 postlarvas/lO m 4 en La Cruz y 72.5 postlarvas/lO m3 en Bahía Kino, siendo P. califomiensis la especie dominante. Cast net and otter trawl were made every two weeks to estimate the distribution and abundance of Penaeus shrimp postlarvae and juveniles in Kino Bay (1X/89-1X/90) and La Cruz coastal lagoon (VII/89-IV/91), Sonora, Mexico. Básicamente esto se debe a los siguientes factores (Ramos-Salas, 1987): (a) al avance en el conocimiento sobre las técnicas de cultivo, (b) al encarecimiento de los costos de captura y (c) a la disponibilidad de extensas superficies aptas para la acuicultura, como vienen a ser los suelos salinos adyacentes al litoral
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