Table 1. Regression parameters (± standard error) for estimating log whole fish N (g) from log fish wet weight (g). SY X is the standard error of the Y estimate.  Data summarized from Ramseyer, L. J.  (2000)   Whole fish weight as an accurate predictor of whole fish nitrogen content:  in review.

Taxonomic group

Slope

Intercept

r2

SY X

Sample size

fish weight range (g)

Acipenseridae

Acipenser spp.

1.08 ± 0.01

-1.84 ± 0.01

0.998

0.0477

48

0.158-388

A. oxyrhynchus

1.01 ± 0.05

-1.71 ± 0.07

0.995

0.0117

4

15.3-30.6

A. transmontanus

1.06 ± 0.01

-1.80 ± 0.01

0.999

0.0326

37

0.158-388

A. baeri

1.12 ± 0.01

-1.93 ± 0.01

1.000

0.0247

7

0.175-119

Anarchichadidae

Anarhichas lupus

0.93 ± 0.19

-1.37 ± 0.48

0.705

0.112

12

110-460

Anguillidae

Anguilla anguilla

1.05 ± 0.05

-1.66 ± 0.04

0.925

0.0567

34

1.99-13.8

Bagridae

Mystus nemurus

1.09 ± 0.04

-1.77 ± 0.07

0.983

0.0357

15

24.7-110

Bothidae

Scopthalmus maximus

1.07 ± 0.01

-1.70 ± 0.01

1.000

0.0165

24

2.64-52.1

Carangidae

1.03 ± 0.00

-1.57 ± 0.01

0.998

0.0241

112

1.8-749

Seriola quinqueradiata

1.03 ± 0.00

-1.58 ± 0.01

0.998

0.0239

108

1.8-749

Caranx delicatissimus

0.97 ± 0.06

-1.44 ± 0.10

0.993

0.0131

4

35.4-66.7

Centrarchidae

1.01 ± 0.00

-1.59 ± 0.01

0.997

0.0290

153

0.47-166

Micropterus salmoides

1.17 ± 0.15

-1.79 ± 0.22

0.885

0.0170

10

24.3-31.1

Lepomis spp.

1.01 ± 0.00

-1.59 ± 0.01

0.997

0.0286

143

0.47-166

L. macrochirus

1.01 ± 0.00

-1.59 ± 0.01

0.997

0.0298

127

0.47-166

L. megalotis

1.00 ± 0.01

-1.57 ± 0.02

0.999

0.00994

5

15.3-106

L. cyanellus

1.04 ± 0.02

-1.66 ± 0.03

0.999

0.00921

4

14.8-62.7

L. cyanellus × L. macrochirus

0.97 ± 0.02

-1.53 ± 0.02

0.998

0.0109

7

15.3-50.7

Chanidae

Chanos chanos

1.00 ± 0.01

-1.58 ± 0.02

0.997

0.0304

18

5.48-202

Channidae

Channa spp.1

1.07 ± 0.01

-1.62 ± 0.01

1.00

0.0148

22

12.0-315

C. striata

1.13 ± 0.03

-1.70 ± 0.03

0.994

0.00996

13

12.0-29.7

C. micropeltes

1.21 ± 0.03

-1.96 ± 0.07

0.996

0.00898

9

129-315

Characidae

Colossoma macropomum

1.03 ± 0.04

-1.67 ± 0.06

0.988

0.0558

11

1.1-49.6

Cichlidae

1.00 ± 0.00

-1.61 ± 0.00

0.995

0.0501

392

0.012-233

Tilapia zillii

0.93 ± 0.04

-1.54 ± 0.02

0.988

0.0235

10

1.85-7.2

Oreochromis niloticus

0.99 ± 0.00

-1.60 ± 0.01

0.995

0.0528

198

0.012-198

O. aureus

1.09 ± 0.02

-1.70 ± 0.02

0.994

0.0316

20

2.61-31.4

O. niloticus × O. aureus

1.00 ± 0.01

-1.62 ± 0.01

0.989

0.0327

59

1.34-17

O. mossambicus

1.06 ± 0.01

-1.65 ± 0.01

0.994

0.0481

74

0.297-223

Cichlasoma spp.

1.07 ± 0.01

-1.59 ± 0.01

0.998

0.0242

14

0.081-2.64

C. synspilum

1.07 ± 0.01

-1.60 ± 0.00

1.00

0.00848

7

0.28-2.64

C. urophthalmus

1.08 ± 0.03

-1.59 ± 0.02

0.996

0.0355

7

0.081-1.54

Clariidae

Clarias gariepinus

1.05 ± 0.00

-1.69 ± 0.01

0.996

0.0252

239

1.59-393

Heteropneustes fossilis

1.45 ± 0.15

-1.78 ± 0.05

0.957

0.0236

6

1.68-2.46

Clupeidae

Sardinops melanosticta

0.74 ± 0.06

-1.07 ± 0.11

0.859

0.0172

30

63.7-114

Cyprinidae

1.03 ± 0.002

-1.69 ± 0.003

0.999

0.0368

369

0.0078-1450

Cyprinus carpio

1.03 ± 0.002

-1.69 ± 0.003

0.999

0.0348

302

0.0078-1450

Labeo rohita

1.17 ± 0.03

-1.72 ± 0.02

0.989

0.0299

16

1.02-6.86

Ctenopharyngodon idella

1.03 ± 0.01

-1.69 ± 0.01

0.999

0.0321

17

0.173-124

Aristichthys nobilis

1.13 ± 0.04

-1.62 ± 0.03

0.994

0.00978

7

0.135-0.254

Barbodes altus

1.08 ± 0.05

-1.66 ± 0.05

0.987

0.0103

7

4.98-8.57

Esocidae

Esox spp.

1.11 ± 0.02

-1.69 ± 0.03

0.997

0.0379

11

0.71-99

E. masquinongy

1.21 ± 0.06

-1.82 ± 0.09

0.993

0.0171

5

21-47

E. masquinongy × E. lucius

1.11 ± 0.01

-1.71 ± 0.02

0.999

0.0250

6

0.71-99

Gadidae

Gadus morhua

1.04 ± 0.2

-1.77 ± 0.6

0.844

0.0228

6

258-334

Ictaluridae

Ictalurus spp.

1.06 ± 0.00

-1.72 ± 0.01

0.998

0.0441

110

0.038-1614

I. punctatus

1.06 ± 0.01

-1.72 ± 0.01

0.998

0.0461

97

0.038-1614

I. furcatus

1.05 ± 0.01

-1.71 ± 0.02

0.998

0.0274

13

27.5-1304

Mugilidae

Mugil capito

1.09 ± 0.02

-1.66 ± 0.01

0.999

0.00854

6

2.48-9.76

Chelon labrosus

1.00 ± 0.01

-1.57 ± 0.01

0.999

0.0175

11

1.15-41.6

Liza haematocheila

1.12 ± 0.02

-1.64 ± 0.01

0.999

0.0136

7

1.22-11.0

Percichthyidae

Morone labrax

1.01 ± 0.00

-1.56 ± 0.01

0.999

0.0144

39

2.67-233

M. saxatilis

0.86 ± 0.09

-1.42 ± 0.07

0.977

0.0216

4

3.4-6.9

M. saxatilis × M. mississippiensis

1.11 ± 0.08

-1.85 ± 0.2

0.995

0.0555

3

54.0-405

M. chrysops × M. saxatilis

1.02 ± 0.01

-1.61 ± 0.01

0.998

0.0224

49

16.9-565

M. saxatilis × M. chrysops

0.92 ± 0.03

-1.38 ± 0.05

0.980

0.0600

21

10.9-629

Percidae

1.06 ± 0.01

-1.66 ± 0.01

0.992

0.0338

84

0.4-48.1

Perca flavescens

1.06 ± 0.01

-1.67 ± 0.02

0.990

0.0333

72

3.5-48.1

Stizostedion vitreum

1.08 ± 0.00

-1.65 ± 0.00

1.00

0.00560

12

0.4-39.5

Poeciliidae

Poecilia reticulata

2.01 ± 0.3

-1.43 ± 0.06

0.922

0.0194

6

0.54-0.65

Salmonidae

1.05 ± 0.001

-1.66 ± 0.003

0.998

0.0350

753

0.25-4000

Oncorhynchus spp.

1.04 ± 0.002

-1.65 ± 0.003

0.999

0.0309

591

0.28-1297

O. nerka

1.05 ± 0.01

-1.65 ± 0.02

0.994

0.0401

36

1.39-289

O. mykiss

1.05 ± 0.002

-1.66 ± 0.003

0.999

0.0282

480

0.31-1297

O. gorbuscha

1.07 ± 0.02

-1.64 ± 0.01

0.996

0.0305

16

0.28-4.97

O. keta

1.07 ± 0.01

-1.64 ± 0.00

0.999

0.00935

20

1.26-9.1

O. tshawytscha

1.03 ± 0.03

-1.60 ± 0.03

0.990

0.0544

15

1.6-40.6

O. kisutch

1.03 ± 0.01

-1.63 ± 0.01

0.999

0.0132

24

18.2-300

Salvelinus spp.

1.04 ± 0.01

-1.72 ± 0.02

0.992

0.0438

48

1.33-48.0

S. fontinalis

1.05 ± 0.01

-1.74 ± 0.02

0.993

0.0406

41

1.6-48

S. namaycush

1.19 ± 0.03

-1.76 ± 0.02

0.997

0.0152

7

1.33-5.43

Salmo spp.

1.05 ± 0.00

-1.67 ± 0.00

0.999

0.0262

114

0.25-4000

S. salar

1.05 ± 0.00

-1.67 ± 0.00

0.999

0.0241

96

0.25-4000

S. trutta

1.04 ± 0.01

-1.67 ± 0.01

0.999

0.0317

18

3.91-2610

Scaenidae

1.03 ± 0.01

-1.61 ± 0.01

0.995

0.0429

103

0.37-394

Scaenops ocellatus

1.02 ± 0.01

-1.61 ± 0.01

0.995

0.0444

95

0.37-394

Micropogonas undulatus

1.17 ± 0.07

-1.80 ± 0.08

0.980

0.0135

8

11.9-20.8

Serranidae

Epinephelus spp.

1.11 ± 0.02

-1.71 ± 0.03

0.995

0.0339

20

2.37-61.5

E. striatus

1.08 ± 0.07

-1.69 ± 0.06

0.988

0.0456

5

2.37-14.2

E. malabaricus

1.07 ± 0.04

-1.64 ± 0.06

0.984

0.0308

15

9.2-61.5

Siganidae

Siganus guttatus

1.13 ± 0.02

-1.65 ± 0.01

0.999

0.0140

8

0.93-8.02

Sparidae

Rhabdosargus sarba

1.04 ± 0.02

-1.50 ± 0.01

0.996

0.0114

12

1.45-5.92

Sparus auratus

1.01 ± 0.01

-1.57 ± 0.01

0.999

0.0208

28

1.2-86.1

Pagrus major

1.04 ± 0.01

-1.59 ± 0.01

0.999

0.0142

33

1.6-43.5

Tetraodontidae

Takifugu rubripes

1.24 ± 0.08

-1.79 ± 0.04

0.964

0.0164

12

2.64-4.43

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