The server is under maintenance between 08:00 to 12:00 (GMT+08:00), and please visit later.
We apologize for any inconvenience caused
Login  | Sign Up  |  Oriprobe Inc. Feed
China/Asia On Demand
Journal Articles
Laws/Policies/Regulations
Companies/Products
Bookmark and Share
TROPHIC POSITION FOR PRIONACE GLAUCA IN THE EASTERN PACIFIC OCEAN BASED ON STABLE ISOTOPE
Author(s): 
Pages: 369-373
Year: Issue:  2
Journal: Oceanologia et Limnologia Sinica

Keyword:  stable isotopetrophic positionPrionace glaucaeastern Pacific Ocean;
Abstract: Stable isotope techniques provide a powerful tool for the analysis of trophic relations in freshwater and marine ecosystems. However, relatively fewer studies have been focused on oceanic fishes. In this study, using whole section of vertebrae of blue shark(Prionace glauca) from the eastern Pacific Ocean(153—242cm fork length), stable isotope ratios of carbon and nitrogen(δ13C and δ15N), and trophic position(TP) of blue shark were analyzed. The results show that the ranges of δ13C and δ15N were –15.76‰— –13.41‰ and 10.62‰—17.72‰, respectively. There was no obvious trend in the relationship between δ13C or δ15N and blue shark size; and no significant difference in δ13C or δ15N between sexes. However, the choice of different baseline species affected obviously the values of TP. Therefore, it is feasible to investigate blue shark feeding ecology based on stable isotope analysis with the whole section of vertebrae. We suggest that future studies shall focus on the relative changes of TP, to reduce the impact from the selection of baseline species.
Related Articles
No related articles found