基于稳定同位素技术的秘鲁外海茎柔鱼摄食洄游初探

s a pelagic cephalopod, jumbo squids (Dosidicus gigas) play a major role in the marine ecosystems of the eastern Pacific. The isotopic signature of gladius proved to be a powerful tool to depict high resolution and ontogenic variations in individual foraging strategies of squids. In this research, with the objectives of studying the feeding ecology of jumbo squid through its life span and figuring out the migratory patterns of this species, the stable carbon and nitrogen isotopes of gladius profiles were investigated. The stable isotope values of gladius profiles of jumbo squids from the two stocks have different feeding habits and migration patterns and both squids had multiple dietary shifts and migrations through their life span. These results will be helpful for better understanding the trophic ecology of this strong economic and ecologically important species and the ecosystem-based management of this species in the future.