Ecological Archives E095-110-A2

Karen E. Arthur, Shaleyla Kelez, Thomas Larsen, C. Anela Choy, Brian N. Popp. 2014. Tracing the biosynthetic source of essential amino acids in marine turtles using δ13C fingerprints. Ecology 95:1285–1293. http://dx.doi.org/10.1890/13-0263.1

Appendix B. Inter-laboratory calibration of essential amino acid δ13C values.

Table B1. To ensure animal and primary producer data were comparable for predicting the biosynthetic origin of essential amino acids (EAA) using the linear discriminant model of Larsen et al. (2013), δ13CEAA values (‰) in fish tissue from three central Pacific fish samples (see Appendix A for sample identities) were measured at both the University of Hawaii (‘Arthur’) and University of Kiel (‘Larsen’) to generate calibration δ13CEAA values for the marine turtle data set.

 

Lg

 

Ch

 

Xg

Calibration values for turtle data set

Amino Acid

Arthur

Larsen

 

Arthur

Larsen

 

Arthur

Larsen

Threonine

-8.73

-8.80

 

-10.09

-10.60

 

-11.34a

-7.12a

0.29±0.31

Valine

-23.16

-24.06

 

-22.09

-22.45

 

-22.66

-22.98

0.53±0.32

Leucine

-27.66

-26.07

 

-25.42

-24.65

 

-27.14

-25.90

-1.20±0.41

Isoleucine

-20.06

-18.29

 

-18.37

-16.85

 

-20.26

-16.83

-2.24±1.04

Phenylalanine

-27.14

-25.46

 

-26.72

-24.04

 

-27.81

-24.23

-2.65±0.95

Lysine

-18.81

-18.99

 

-16.87

-18.64

 

-18.55

-18.97

0.79±0.86

a) Values omitted due to large discrepancies.


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