Migration ecology of juvenile temperate seabass Lateolabrax japonicus : a carbon stable-issotope approach
Migration ecology of juvenile temperate seabass Lateolabrax japonicus : a carbon stable-issotope approach
复制标题
温带鲈鱼幼鱼的洄游生态学：碳稳定同位素方法
DOI：
10.1111/j.1095-8649.2011.02990.x
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发表时间：
2011
影响因子：
2
通讯作者：
Y Yamashita
中科院分区：
文献类型：
--
作者：
T Fuji;A Kasai;KW Suzuki;M Ueno;Y Yamashita
利用碳稳定同位素比值（δ 13 C）研究了日本花鲈幼鱼在尤拉河河口分层区的迁移规律，结果表明，日本花鲈幼鱼的δ 13 C值在河口下游和碎波带（LES）呈明显的富集趋势，而在淡水带（FW）呈明显的亏损趋势。而FW中的δ ~（13）C则有所减少，这与猎物的δ ~（13）C差异相一致。δ 13 C的测定结果表明，4 ~ 6月有大量的幼鱼向上游迁移，其中大部分幼鱼至少在FW停留到7月。在FW和LES停留相对较长时间（> c.20天）的少年比在FW停留较短时间（几天）的少年表现出更高的条件因子。这表明，居住在FW使青少年达到良好的身体状况，居住在LES。
The migration pattern of juvenile temperate seabassLateolabrax japonicusin the stratified estuary of the Yura River was examined using carbon stable‐isotope ratios (δ13C).δ13C values of mysids, which are the most important prey items for this species, were consistently enriched in the lower estuary and surf zone (LES), while depleted in the freshwater zone (FW).δ13C values of juveniles in LES were enriched, while those in FW were depleted, consistent with theδ13C difference in prey items. The results ofδ13C showed that many juveniles migrated upstream from April to June and most of them stayed in FW until at least July. Juveniles that stayed in FW and LES for a relatively longer period (> c.20 days) showed higher condition factors than those that stayed in FW for a short period (several days). This indicates that residence in FW enabled juveniles to achieve as good a body condition as residence in LES.