| The trophic dynamic Links of migratory juvenile brown shrimp Penaeus aztecus were investigated along the South Texas coast from the Aransas Pass to Corpus Christi and Nueces Bay and to the nursery ground in the Nueces Delta. Shrimps and their potential food sources were measured for delta(13)C and delta(15)N ratios between December 1995 and July 1996. During this period, shrimp length increased from 10 to 11 mm, when the animals entered Corpus Christi Bay as larvae, to 80-90 mm, when they returned to Mexico Gulf as sub-adults. Brown shrimp exhibited spatial and temporal delta(13)C variation (from -25.2 to 12.5 parts per thousand), indicating a high diversity of food sources throughout their migration. From delta(13)C values, the main sources used as food... |
