TM 110 main page
Table 3. Fork
length (FL) - total weight (WT) relationships for 13 shark species from
the western North Atlantic, based on WT = (a)FLb. (Fork length
and weight means and ranges were taken from data presented in this study.
Maximum fork lengths and fork lengths at maturity were obtained from the
literature.)
|
|
Species
|
Sex
|
N
|
Mean
fork
length
(cm)
|
Fork
length
range
(cm)
|
Maximum
fork
length
(cm)
|
Fork
length at
maturity
(cm)
|
Mean
weight
(kg)
|
Weight
range
(kg)
|
WT = (a)FLb
|
|
a
|
b
|
r2
|
Bigeye thresher
(Alopias superciliosus)
|
Combined
|
55
|
190
|
100-228
|
270[a]
|
|
99
|
11-170
|
9.1069 x 10-6
|
3.0802
|
0.9059
|
|
Male
|
34
|
188
|
100-221
|
180[a]
|
92
|
11-150
|
|
Female
|
21
|
194
|
123-228
|
214[a]
|
110
|
23-170
|
Thresher shark
(A. vulpinus)
|
Combined
|
88
|
201
|
154-262
|
276[d]
|
|
122
|
54-211
|
1.8821 x 10-4
|
2.5188
|
0.8795
|
|
Male
|
46
|
197
|
154-228
|
184[b]
|
116
|
54-181
|
|
Female
|
41
|
207
|
155-262
|
226[b]
|
129
|
59-211
|
White shark
(Carcharodon carcharias)
|
Combined
|
125
|
186
|
112-493
|
555[c]
|
|
141
|
12-1554
|
7.5763 x 10-6
|
3.0848
|
0.9802
|
|
Male
|
65
|
203
|
117-493
|
332[b]
|
208
|
16-1554
|
|
Female
|
59
|
168
|
112-310
|
454[l]
|
69
|
12-297
|
Shortfin mako
(Isurus oxyrinchus)
|
Combined
|
2081
|
172
|
65-338
|
336[d]
|
|
63
|
2-531
|
5.2432 x 10-6
|
3.1407
|
0.9587
|
|
Male
|
1007
|
169
|
70-260
|
179[e]
|
59
|
2-210
|
|
Female
|
1054
|
174
|
65-338
|
258[e]
|
68
|
3-531
|
Porbeagle
(Lamna nasus)
|
Combined
|
15
|
185
|
106-227
|
329[a]
|
|
83
|
19-143
|
1.4823 x 10-5
|
2.9641
|
0.9437
|
|
Male
|
13
|
180
|
106-216
|
159[f]
|
77
|
19-113
|
|
Female
|
2
|
214
|
201-227
|
204[f]
|
117
|
91-143
|
Bignose shark
(Carcharhinus altimus)
|
Combined
|
38
|
151
|
97-210
|
235[a]
|
|
42
|
6-143
|
1.0160 x 10-6
|
3.4613
|
0.8958
|
|
Male
|
12
|
158
|
115-205
|
182[g]
|
45
|
14-99
|
|
Female
|
26
|
148
|
97-210
|
190[g]
|
41
|
6-143
|
Silky shark
(C. falciformis)
|
Combined
|
85
|
118
|
73-212
|
253[h]
|
|
22
|
4-88
|
1.5406 x 10-5
|
2.9221
|
0.9720
|
|
Male
|
39
|
117
|
73-196
|
178[k]
|
22
|
4-88
|
|
Female
|
46
|
119
|
78-212
|
186[k]
|
22
|
4-88
|
Dusky shark
(C. obscurus)
|
Combined
|
247
|
162
|
79-287
|
303[g]
|
|
69
|
5-270
|
3.2415 x 10-5
|
2.7862
|
0.9649
|
|
Male
|
103
|
136
|
79-276
|
231[h]
|
39
|
5-216
|
|
Female
|
144
|
181
|
83-287
|
235[h]
|
90
|
6-270
|
Sandbar shark
(C. plumbeus)
|
Combined
|
1548
|
129
|
44-201
|
198[g]
|
|
30
|
1-104
|
1.0885 x 10-5
|
3.0124
|
0.9385
|
|
Male
|
577
|
115
|
45-183
|
150[h]
|
20
|
1-68
|
|
Female
|
961
|
138
|
44-201
|
152[h]
|
36
|
1-104
|
Night shark
(C. signatus)
|
Combined
|
124
|
111
|
60-203
|
235[a]
|
|
15
|
3-102
|
2.9206 x 10-6
|
3.2473
|
0.9502
|
|
Male
|
69
|
112
|
93-195
|
-
|
14
|
8-64
|
|
Female
|
55
|
111
|
60-203
|
150[g]
|
16
|
3-102
|
Tiger shark
(Galeocerdo cuvier)
|
Combined
|
187
|
203
|
92-339
|
469[a]
|
|
110
|
5-499
|
2.5281 x 10-6
|
3.2603
|
0.9550
|
|
Male
|
92
|
209
|
95-318
|
258[i]
|
113
|
7-348
|
|
Female
|
92
|
197
|
92-339
|
265[i]
|
107
|
5-499
|
Blue shark
(Prionace glauca)
|
Combined
|
4529
|
195
|
52-288
|
320[a]
|
|
52
|
1-174
|
3.1841 x 10-6
|
3.1313
|
0.9521
|
|
Male
|
3095
|
205
|
54-288
|
183[j]
|
59
|
1-174
|
|
Female
|
1398
|
172
|
52-273
|
185[j]
|
34
|
1-140
|
Scalloped
hammerhead
(Sphyrna lewini)
|
Combined
|
390
|
158
|
79-243
|
239[k]
|
|
47
|
5-166
|
7.7745 x 10-6
|
3.0669
|
0.9255
|
|
Male
|
189
|
166
|
107-224
|
139[k]
|
53
|
11-126
|
|
Female
|
199
|
151
|
79-243
|
194[k]
|
41
|
5-166
|
[a] Castro (1983).
[b] H.L. Pratt, Jr., personal communication; National Marine
Fisheries Service, Narragansett, RI; May 1993.
[c] Randall (1987).
[d] Pratt and Casey (1990).
[e] Stevens (1983).
[f] Aasen (1961).
[g] Compagno (1984).
[h] Springer (1960).
[i] Branstetter et al. (1987).
[j] Pratt (1979).
[k] Branstetter (1987).
[l] Casey and Pratt (1985). |