两种有胎盘鲨鱼的母子同位素分馏。

Mother-offspring isotope fractionation in two species of placentatrophic sharks.

机构信息

Marine Science Program, Department of Biological Sciences, Florida International University, North Miami, FL 33181, USA.

出版信息

J Fish Biol. 2010 Nov;77(7):1724-7. doi: 10.1111/j.1095-8649.2010.02813.x. Epub 2010 Oct 21.

DOI:10.1111/j.1095-8649.2010.02813.x

PMID:21078031

Abstract

Stable-isotope values of a scalloped hammerhead Sphyrna lewini and blacktip shark Carcharhinus limbatus and their respective embryos were analysed. Embryos of both species were enriched in δ(15) N compared to their mothers (0·82 and 0·88‰, respectively), but fractionation of δ(13) C varied. Embryonic S. lewini were enriched (1·00‰) in δ(13) C while C. limbatus were depleted (0·27‰) relative to their mothers.

摘要

分析了皱唇鲨 Sphyrna lewini 和黑鳍鲨 Carcharhinus limbatus 的稳定同位素值及其各自胚胎的稳定同位素值。与母亲相比，两种鲨鱼的胚胎的 δ(15) N 均富集（分别为 0.82 和 0.88‰），但 δ(13) C 的分馏则不同。与母亲相比，皱唇鲨胚胎的 δ(13) C 富集（1.00‰），而黑鳍鲨胚胎的 δ(13) C 则贫化（0.27‰）。