Journal of Marine Sciences / 2011 / Article / Tab 2 / Research Article
Sexually Dimorphic Morphological Characters in Five North Atlantic Deepwater Skates (Chondrichthyes: Rajiformes) Table 2 Morphometrics and meristics of male and female pale ray Bathyraja pallida from different areas of the North Atlantic (significant differences are given in bold, number of specimens examined are shown in parentheses, m = standard error, na = not available).
Females (3) Males (7) Character Absolute % TL Absolute % TL Min Max Mean Min Max Mean
m Min Max Mean Min Max Mean ±
m TL, mm 1285.0 1565.0 1437.0 311.0 1490.0 948.3 Disc, width 845.0 1015.7 932.2 64.0 65.8 64.9 ± 0.50 197.0 1050.0 623.0 60.5 70.5 65.5 ± 1.19 length 672.0 859.0 791.0 52.3 58.8 55.0 ± 1.95 174.0 851.0 531.7 54.2 57.1 56.1 ± 0.48 Snout length, preorbital 246.0 261.4 253.7 16.7 16.8 16.8 ± 0.06 55.4 215.0 132.8 14.0 19.2 16.1 ± 0.89 preoral 228.5 228.5 228.5 14.6 14.6 14.6 ± na 54.3 285.0 143.1 13.2 19.2 16.8 ± 1.13 prenasal na na na na na na 45.8 184.0 111.8 12.1 15.7 13.5
0.66 Orbit, horizontal diameter 36.0 68.4 56.4 2.3 5.1 4.0 ± 0.86 13.5 63.9 34.3 1.8 4.7 3.9 ± 0.49 Interorbital width 81.4 94.0 87.1 5.2 7.3 6.1
±
0.62 18.6 80.4 47.7 4.2 6.0 5.3
±
0.21 Spiracle length 38.5 39.9 39.2 2.7 3.0 2.9 ± 0.13 8.3 50.5 26.6 2.4 3.4 2.8 ± 0.13 Interspiracular width 125.2 161.0 138.7 8.0 12.5 9.8
±
1.39 25.3 127.0 73.0 6.6 8.8 7.9
±
0.27 Orbit + spiracle length 83.6 91.5 87.6 5.7 7.1 6.4 ± 0.70 17.1 85.7 49.9 4.3 6.1 5.5 ± 0.29 D1, height 23.9 26.6 25.3 1.6 1.7 1.7
±
0.03 6.4 33.5 17.7 1.5 2.2 1.9
0.12 base length 45.9 51.6 48.8 3.1 3.3 3.2
±
0.08 12.2 56.5 34.2 3.4 4.3 3.8
±
0.15 D2, height 25.7 32.9 29.3 1.8 2.1 1.9 ± 0.17 6.7 32.4 19.3 1.8 2.4 2.0 ± 0.07 base length 42.6 53.2 47.9 2.9 3.4 3.2
±
0.24 12.1 53.9 33.1 3.2 4.6 3.6
±
0.24 Interdorsal space 9.9 23.5 16.7 0.7 1.5 1.1 ± 0.41 6.4 27.8 14.2 0.9 2.4 1.7 ± 0.27 C, base length 21.9 na na 1.5 na 1.5 ± na 12.2 34.5 18.8 1.0 3.9 2.2
0.59 Tail, postdorsal length 34.4 na na 2.2 na 2.2 ± na 17.0 32.1 24.6 2.2 2.7 2.4 ± 0.26 height at V-tips 32.9 36.8 34.9 2.5 2.6 2.5
±
0.02 6.8 36.3 22.2 1.9 2.5 2.3
±
0.05 width at V-tips 38.2 43.9 41.1 2.6 3.4 3.0 ± 0.40 8.5 52.0 28.7 1.6 3.6 2.9 ± 0.15 height at D1 origin 16.1 na na 1.1 na 1.1 ± na 3.4 17.1 10.3 0.9 1.2 1.1 ± 0.04 width at D1 origin 22.4 na na 1.5 na 1.5 ± na 3.2 25.3 13.0 0.9 1.7 1.2 ± 0.13 lateral fold length 455.0 na na 31.1 na 31.1 ± na 129.0 544.0 360.0 25.2 41.5 35.1 ± 3.15 Head length, ventrally 351.0 455.0 403.0 27.3 31.1 29.2 ± 1.90 92.5 429.0 276.7 28.2 30.7 29.5 ± 0.34 Mouth width 140.0 170.6 150.9 9.7 10.9 10.5
±
0.39 23.1 142.0 87.4 7.4 9.5 8.8
±
0.44 Internasal width 134.6 147.0 140.0 8.6 10.8 9.8 ± 0.64 26.6 157.0 86.6 8.2 10.5 9.0 ± 0.37 Nasal curtain, length 44.2 45.6 44.9 3.0 3.5 3.3
±
0.26 14.1 70.6 37.4 3.5 4.7 4.0
±
0.24 width 145.0 149.0 147.0 10.2 11.3 10.7
±
0.55 28.9 155.0 87.9 9.2 10.8 9.7
±
0.37 width each lobe 24.4 33.7 29.1 1.9 2.3 2.1
±
0.20 5.0 28.2 17.0 0.8 2.5 1.8
±
0.12 space between lobes na na na na na na 10.0 86.3 48.2 1.6 5.8 3.7 ± 0.26 Gill slit length, first 21.8 25.1 24.0 1.6 1.7 1.7
±
0.04 4.2 29.0 14.8 1.3 1.9 1.5
±
0.10 third 23.7 30.4 27.4 1.8 2.1 1.9 ± 0.09 5.0 37.2 18.1 1.4 2.5 1.8 ± 0.16 fifth 17.1 23.5 20.3 1.3 1.6 1.4 ± 0.10 3.6 23.9 12.8 0.9 1.6 1.3 ± 0.07 Space between first gill slits 246.0 270.7 256.9 17.3 19.1 17.9
±
0.60 48.6 241.0 141.8 12.6 16.7 15.0
±
0.63 fifth gill slits 186.0 190.9 188.0 12.2 14.6 13.2
±
0.71 34.2 166.0 99.3 8.7 11.5 10.7
±
0.45 V-length, anterior lobe 87.0 167.0 127.0 6.8 11.4 9.1 ± 2.33 43.9 177.0 106.8 9.9 15.4 12.2 ± 0.98 posterior lobe 174.0 255.0 214.5 13.5 17.4 15.5 ± 1.95 46.3 269.0 156.6 14.5 18.1 16.1 ± 0.51 Clasper, postanus length na na na na na na 24.5 402.0 212.3 7.9 27.6 17.3 ± 4.20 Snout tip to center of anus 702.0 890.5 812.5 54.6 57.8 56.4
±
0.94 151.1 855.0 504.6 48.6 57.4 52.2
1.51 to max. disc width 435.0 539.0 487.0 33.9 36.9 35.4 ± 1.51 110.3 545.0 331.8 31.8 37.5 35.4 ± 0.88 Center of anus to D1 505.0 519.6 512.3 33.2 34.5 33.9 ± 0.67 109.0 529.0 332.5 32.6 36.9 35.2 ± 0.69 to D2 599.0 na na 41.0 na 41.0 ± na 129.0 602.0 378.0 36.9 42.7 40.4 ± 0.90 to tail tip 621.0 694.9 657.9 42.5 44.4 43.4
±
0.96 156.0 674.0 490.2 44.3 50.2 46.7
±
1.09 No median thorns 16 na 16.0 ± na 16 19 17.6 ± 0.60 No middorsal thorns 1 na 1.0 ± na 0 2 0.8 ± 0.31 Tooth rows upper jaw 25 31 28.0 ± 3.00 24 30 26.2 ± 0.95 lower jaw 25 35 30.0
±
5.00 22 26 24.0
±
0.73
