Table 4.

Nitrogen isotopic offsets between diet, blood and other tissues in published controlled mammal feeding studies

Reference	Species common name	Δ15Ndiet-tissue (‰)
		Liver	Muscle	Hair	Whole Blood	RBC	Plasma
Nakagawa et al., 1985	Rats	2.6		1.6	1.5
Arneson et al., 2005	Mice	4.3	3.1		3.2
Arneson et al., 2005	Mice	4.7	3.1		3.2
Arneson et al., 2005	Mice	3.8	2.0		2.9
Hobson et al., 1996	Harp, Harbor, Ringed seals	3.1	2.4	3.0		1.7
Kurle, 2002a	Northern fur seals					3.9	5.2
Lesage et al., 2002	Gray, Harbor, Harp seals					1.7	3.1b
Lesage et al., 2002	Harp seals					2.0	3.6
Roth and Hobson, 2000	Red fox	3.6	3.6	3.4		2.6	4.2
Yoneyama et al., 1983	Rats	3.4	3.1			2.0	3.9

^aData from 5 seals, excluding that from pregnant/lactating Baabs.

^bData measured on serum, not plasma.