Document of bibliographic reference 300653

BibliographicReference record

Type

Bibliographic resource

Type of document

Journal article

BibLvlCode

AS

Title

Diet source of Euphausia pacifica revealed using carbon- and nitrogen-stable isotopes in the Yellow Sea Cold Water Mass in summer

Abstract

Euphausia pacifica (E. pacifica) is an important food source for fish and other organisms in marine ecosystems. We analyzed the carbon- and nitrogen-stable isotope ratios in potential diet sources to determine the feeding characteristics of E. pacifica in the Yellow Sea Cold Water Mass (YSCWM), a habitat for oversummering. E. pacifica was collected in the spring and summer from the central and coastal parts of the Yellow Sea from 2012 to 2014, and potential prey were collected in summer 2014. Although the δ¹³C values of E. pacifica differed significantly in spring each year, they narrowed to a specific range in summer. The δ¹⁵N values were always 2‰ higher in summer than in spring, suggesting that the diet of E. pacifica inhabiting the YSCWM was limited. In coastal stations, the contribution of any major food source calculated using an isotope mixing model was not more than 20%, suggesting that E. pacifica is omnivorous. However, at two stations in the YSCWM, 2.0–5.0-mm and > 5-mm plankton contributed 42 and 22% of their diet on average, respectively. These results indicate that E. pacifica inhabiting waters affected by cold water feeds on relatively large zooplankton such as the copepods Calanus sinicus. Therefore, the YSCWM likely plays a role in the trophic shift of E. pacifica during the summer.

WebOfScience code

https://www.webofscience.com/wos/woscc/full-record/WOS:000457591500004

Bibliographic citation

Kim, H.; Ju, S.-J.; Kang, J.-H.; Shin, K.-H. (2019). Diet source of Euphausia pacifica revealed using carbon- and nitrogen-stable isotopes in the Yellow Sea Cold Water Mass in summer. J. Oceanogr. 75(1): 51-59. https://dx.doi.org/10.1007/s10872-018-0483-z

Topic

Marine

Is peer reviewed

true