Utilization of estuarine organic matter during growth and migration by juvenile brown shrimp Penaeus aztecus in a south Texas estuary
Utilization of estuarine organic matter during growth and migration by juvenile brown shrimp Penaeus aztecus in a south Texas estuary
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德克萨斯州南部河口的阿兹台克对虾幼年生长和洄游过程中对河口有机质的利用
DOI：
10.3354/meps199205
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发表时间：
2000
影响因子：
2.5
通讯作者：
P. Richard
中科院分区：
文献类型：
--
作者：
P. Riera;P. Montagna;R. Kalke;P. Richard
营养动态链接的迁移幼年棕色虾Penaeus aztecus进行了调查沿着南得克萨斯州海岸从阿兰萨斯通行证科珀斯克里斯蒂和Nueces湾和苗圃地在Nueces三角洲。在1995年12月至1996年7月期间测量了虾及其潜在食物来源的δ（13）C和δ（15）N比率。在此期间，虾的长度从10至11毫米，当动物进入科珀斯克里斯蒂湾作为幼虫，到80-90毫米，当他们返回墨西哥湾作为亚成体。褐虾表现出空间和时间的δ（13）C变化（从-25.2至12.5ppm），表明在整个迁徙过程中食物来源的高度多样性。从δ（13）C值来看，林孔河口湿地褐虾幼虾的主要食物来源是互花米草和S。Spartinae碎屑和底栖硅藻。δ（13）C和δ（15）N值表明，河流入流携带的有机质输入也对洄游褐虾的摄食有显著贡献。在这些沼泽栖息地，虾同位素比值变化迅速，表明高组织周转率。研究表明，通过引入淡水流入恢复后的沿海沼泽可能为褐对虾幼虾的生长发育提供有利的摄食生境。
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 sources by juvenile brown shrimp in the Rincon Bayou marsh were Spartina alterniflora and S. spartinae detritus and benthic diatoms. delta(13)C and delta(15)N values showed that organic matter inputs carried by the river inflow can also contribute significantly to the feeding of migratory brown shrimp. In these marsh habitats, shrimp isotopic ratios changed rapidly, suggesting high tissue turnover rates. The study showed that coastal marshes after restoration through the introduction of freshwater inflow may provide feeding habitats favorable for growth and development of juvenile brown shrimp.