摘要 : This study was aimed at the analysis and statistical comparison of feeding spectra of the chum salmon Oncorhynchus keta of various sizes in the Bering Sea and the Pacific waters of Kamchatka. The feeding spectrum was qualitatively... 展开 This study was aimed at the analysis and statistical comparison of feeding spectra of the chum salmon Oncorhynchus keta of various sizes in the Bering Sea and the Pacific waters of Kamchatka. The feeding spectrum was qualitatively and quantitatively different in the chum salmon longer and shorter than 40 cm. Differences were noted in the consumption of amphipods, copepods, jellyfish, and nekton on the whole. Feeding on jellyfish is a characteristic trait of chum salmon with a length exceeding 50 cm. Most probably, the presence of jellyfish and ctenophorans in the diet points to age-related morphological adaptations. Similarities in the feeding spectra were analyzed for large (1986, 1993, 1995, 1990, 1992, 2000, 2002) and small (1986, 1990, 1992, 2002) chum salmon using cluster analysis. The feeding spectra of the chum salmon in the Bering Sea and the Pacific waters of Kamchatka differ, which is most probably associated with the condition of the food resources and higher plasticity of feeding in this species. 收起