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Riera, Pascal; Montagna, Pa; Kalke, Rd; Richard, Pierre. |
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... |
Tipo: Text |
Palavras-chave: Penaeus aztecus; Food sources; Migration; Nursery area; Delta C 13 and delta N 15. |
Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00000/10496/7604.pdf |
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Melo,Bruno F.; Sato,Yoshimi; Foresti,Fausto; Oliveira,Claudio. |
The rio São Francisco basin contains many endemic species, such as Prochilodus argenteus and P. costatus, which have great commercial importance. However, information about the main recruitment sites and genetic studies containing extensive sampling of these species are scarce. To investigate the roles of the marginal lagoons in the maintenance of genetic variability and in the population structure, we analyzed six microsatellite loci in nine sampling groups of P. argenteusand five sampling groups of P. costatus. Our results showed high levels of genetic variability and low values of genetic differentiation for P. argenteus (FST =0.008, P< 0.05) and for P. costatus(FST =0.031, P < 0.05). In addition, high values of gene flow combined with a small... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conservation genetics; Fish migration; Microsatellite; Nursery area; Rio São Francisco basin. |
Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000300625 |
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