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Table 2 Long chain fatty acid composition of the adipose tissue of the Nile crocodile (Crocodylus niloticus) with and without pansteatitis, compared with that of the liver. Values expressed as mean ± SEM in % composition of the total lipid

From: Histomorphology, ultrastructure and fatty acid composition of the adipose tissue in pansteatitis, the potentials in understanding the underlying mechanism and diagnosis of pansteatitis in the Nile crocodile

Fatty acids (%)

Abdominal fat body

n = 10

Visceral fat

n = 10

Intramuscular fat

n = 10

Subcutaneous fat

n = 8

Liver

n = 10

Pansteatitis

fat

n = 10

P values

C12:0

Lauric acid

Nil

Nil

Nil

Nil

Nil

0.00387 ± 0.0038

ND

C13:0

Methyltridecanoate

(Tridecanoic acid)

Nil

Nil

Nil

Nil

Nil

0.00634 ± 0.0038

ND

C14:0

Myristic acid

(Tetradecanoic acid)

1.30 ± 0.13a

1.16 ± 0.12b

1.22 ± 0.148c

1.00 ± 0.11d

0.77 ± 0.27e

5.10 ± 0.21abcde

P < 0.0001

C14:1

Myristoleic acid

(Tetradecenoic acid)

0.006 ± 0.004a

Nil

0.024 ± 0.009b

0.018 ± 0.007c

Nil

0.054 ± 0.01abc

P < 0.0001

C15:0

Pentadecanoic acid

0.14 ± 0.02a

0.16 ± 0.01b

0.15 ± 016c

0.13 ± 0.01d

0.15 ± 0.05e

1.04 ± 0.08abcde

P < 0.0001

C15:1

cis-10-Pentadecenoic acid

Nil

Nil

Nil

Nil

Nil

0.052 ± 0.023

P < 0.01

C16:0

Palmitic acid

(Hexadecanoic acid)

26.460 ± 0.97

24.83 ± 1.908

22.82 ± 1.91ab

23.74 ± 0.193c

29.48 ± 1.590a

30.30 ± 1.63bc

P < 0.0001

C16:1

Palmitoleic acid

(cis-Δ9-Hexadecenoic acid)

4.67 ± 0.34ab

4.65 ± 0.15cd

4.10 ± 0.36ef

4.91 ± 0.25gh

2.14 ± 0.31acegi

8.32 ± 0.40bdfhi

P < 0.0001

C17:0

Margaric acid

0.27 ± 0.04a

0.33 ± 0.02b

0.31 ± 0.04c

0.25 ± 0.04d

0.37 ± 0.11e

0.84 ± 0.11abcde

P < 0.0001

C17:1

Heptadecenoic acid

0.022 ± 0.01a

0.0076 ± 0.026b

0.042 ± 0.014c

0.0413 ± 0.018d

Nil

0.74 ± 0.03abcd

P < 0.0001

C18:0

Stearic acid

(Octadecanoic acid)

7.48 ± 0.21ab

7.40 ± 0.34cd

7.15 ± 0.62ef

7.22 ± 0.14gh

13.20 ± 0.97acegi

4.39 ± 0.30bdfhi

P < 0.0001

C18:1n9c

Oleic acid

(cis-Δ9–Octadecenoic acid)

37.09 ± 0.94 ab

37.34 ± 0.91 cd

35.16 ± 3.14e

40.68 ± 0.98fg

30.05 ± 0.99aefh

22.92 ± 0.99bdegh

P < 0.0001

C18:1n9t

Elaidic acid

(trans-Δ9-Octadecenoic acid)

Nil

Nil

Nil

Nil

0.67 ± 0.08a

0.02 ± 0.013a

P < 0.001

C18:2n6t

Linolelaidic acid

Nil

Nil

Nil

Nil

Nil

0.0026 ± 0.0026

ND

C18:2n6c

Linoleic acid

(Methyl lineoleate)

20.07 ± 0.69a

21.14 ± 0.82b

18.33 ± 1.51c

19.85 ± 0.32d

18.40 ± 0.87e

2.87 ± 0.25abcde

P < 0.0001

C20:0

Arachidic acid

(Eicosanoic acid)

0.0045 ± 0.062a

0.029 ± 0.044b

0.95 ± 0.032c

0.05 ± 0.023d

0.008 ± 0.008e

0.26 ± 0.024abcde

P < 0.0001

C18:3n3

α Linolenic acid

0.76 ± 0.06ab

0.79 ± 0.05cd

0.76 ± 0.08ef

0.78 ± 0.07gh

0.20 ± 0.07acegi

1.75 ± 0.21bdfhi

P < 0.0001

C18:3n6

γ Linolenic acid

0.39 ± 0.13a

0.38 ± 0.10b

0.34 ± 0.96c

0.37 ± 0.13d

1.50 ± 0.33abcde

0.28 ± 0.026e

P < 0.0001

C20:1n9

Eicosaenoic acid

0.41 ± 0.05ab

0.40 ± 0.03cd

0.35 ± 0.04e

0.32 ± 0.04f

0.12 ± 0.04acg

0.75 ± 0.13bdefg

P < 0.0001

C20:2

Eicosadienoic acid

0.07 ± 0.05a

0.18 ± 0.04b

0.15 ± 0.05c

0.11 ± 0.03d

0.20 ± 0.09e

3.18 ± 0.38abcde

P < 0.0001

C21:0

Heneicosanoic acid

Nil

Nil

Nil

Nil

0.004 ± 0.004

Nil

ND

C22.0

Behenic acid

(Docosanoic acid)

0.017 ± 0.01a

0.023 ± 0.012b

0.039 ± 0.013c

0.018 ± 0.009d

0.27 ± 0.012abcde

0.002 ± 0.002e

P < 0.01

C20:3n6

Eicosatrienoic acid

0.30 ± 0.07

0.35 ± 0.07

0.33 ± 0.08

0.34 ± 0.11

1.89 ± 0.18abcde

0.39 ± 0.08

P < 0.0001

C22:1n9

Erucic acid

0.001 ± 0.001a

0

0.002 ± 0.001

0

0

0.009 ± 0.004a

P < 0.01

C20:3n3

Eicosatrienoic acid

Nil

Nil

Nil

Nil

Nil

0.15 ± 0.03

ND

C20:4n6

Arachidonic acid

0.51 ± 0.08a

0.52 ± 0.08b

0.46 ± 0.08c

0.53 ± 0.11d

3.59 ± 0.61abcde

0.67 ± 0.09e

P < 0.0001

C22:2n6

Docosadienoic acid

0

0

0.003 ± 0.003a

0.008 ± 0.008ab

0

1.90 ± 0.17

P < 0.0001

C24:0

Lignoceric acid

(Tetracosanoic acid)

0.004 ± 0.003a

0.002 ± 0.001b

0.004 ± 0.002c

0

0.10 ± 0.05abcd

0.0003 ± 0.0003d

P < 0.01

C24:1

Nervonic acid

(cis-15-tetracosenoic acid)

0.03 ± 0.01a

0.03 ± 0.01b

0.04 ± 0.01c

0.03 ± 0.10d

0.60 ± 0.11abcde

0.02 ± 0.008e

P < 0.0001

C20:5n3

Eicosapentaenoic acid

0.50 ± 0.09a

0.57 ± 0.13b

0.62 ± 0.12c

0.54 ± 0.11d

0.63 ± 0.18e

3.46 ± 0.42abcde

P < 0.0001

C22:6n3

Docohexaenoic acid

0.83 ± 0.09a

0.71 ± 0.12b

0.76 ± 0.12c

0.60 ± 0.11d

0.87 ± 0.16e

10.98 ± 1.28abcde

P < 0.0001

Total Lipid

20.13 ± 1.01abc

22.02 ± 0.91de

23.25 ± 0.54afgh

18.96 ± 0.46fij

1.24 ± 0.17bdgik

10.80 ± 0.82cehjk

P < 0.0001

Total Saturated Lipids

4.77 ± 1.04

4.53 ± 0.97

3.97 ± 0.88

4.32 ± 1.01

4.94 ± 1.03

4.66 ± 1.00

ns

Total Monounsaturated Lipids

6.03 ± 1.55

6.07 ± 1.55

5.67 ± 1.52

7.70 ± 2.17a

5.60 ± 1.44

3.65 ± 0.78a

ns

Total Polyunsaturated Lipids

2.93 ± 0.73

3.08 ± 0.78

2.97 ± 0.78

2.57 ± 0.73

3.51 ± 0.70

2.56 ± 0.34

ns

Total Omega 3

0.70 ± 0.05a

0.69 ± 0.06b

0.69 ± 0.08c

0.63 ± 0.06d

0.57 ± 0.10e

4.08 ± 0.74abcde

P < 0.0001

Total Omega 6

5.32 ± 1.38

5.60 ± 1.45

3.89 ± 1.07

4.09 ± 1.31

6.88 ± 1.25a

1.22 ± 0.16a

P < 0.01

Total Omega 9

12.50 ± 3.24

12.58 ± 3.27

11.84 ± 3.22

20.50 ± 5.23ab

10.28 ± 2.62a

5.93 ± 1.59b

P < 0.01

  1. Values with the same superscripted alphabets are significantly different P < 0.001
  2. ND means not determined
  3. ns means not significant