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首页> 外文期刊>Fisheries Science >Stable isotope analysis reveals ontogenetic migration and the importance of a large mangrove estuary as a feeding ground for juvenile John’s snapper Lutjanus johnii
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Stable isotope analysis reveals ontogenetic migration and the importance of a large mangrove estuary as a feeding ground for juvenile John’s snapper Lutjanus johnii

机译：稳定的同位素分析揭示了成因迁移和大型红树林河口作为幼年约翰鲷鱼Lu鱼Lutjanus johnii的觅食地的重要性。

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Stable carbon (δ13C) and nitrogen (δ15N) isotope ratios were measured to investigate the migration of John’s snapper Lutjanus johnii and its dependence on the food resources provided within the large Matang Mangrove Forest Reserve (40,151 ha), Malaysia. John’s snapper, and its main prey food such as penaeids, Acetes shrimps and mysids, showed generally depleted δ13C values in the inner mangrove area but more enriched values in the river mouth and coastal area. Some juveniles migrated into the inner mangrove areas, although they were also distributed near the river mouth areas. Isotopic signatures of snapper fish and prey reveal the ontogenetic migration of the youngest juvenile fish (<5 cm in total length) from the coastal area into the mangrove area, shifting their dependence from the coastal food web to the inner mangrove food web with their growth. The study shows the importance of the complex interconnected mangrove waterways and associated prey animals present in the large mangrove system to juvenile John’s snapper.
机译：测量了稳定碳（δ 13 C）和氮（δ 15 N）的同位素比，以研究约翰鲷鱼Lutjanus johnii的迁移及其对所提供食物资源的依赖性。马来西亚的大型Matang红树林森林保护区（40,151公顷）。约翰的鲷鱼及其主要猎物（如对虾，醋栗虾和虾米等）在红树林内部显示出通常耗尽的δ 13 C值，但在河口和沿海地区显示出更丰富的值。尽管一些幼鱼也分布在河口附近，但仍有一些幼鱼迁移到了内部红树林地区。鲷鱼和猎物的同位素特征揭示了幼鱼（总长<5 cm）从沿海地区到红树林地区的个体发育迁移，并随着其生长将其依赖性从沿海食物网转移到内部红树林食物网。研究表明，在大型红树林系统中，复杂的相互连接的红树林水道和相关的捕食动物对于幼年的鲷鱼很重要。

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