Journal of Marine Sciences / 2011 / Article / Tab 1 / Research Article
Sexually Dimorphic Morphological Characters in Five North Atlantic Deepwater Skates (Chondrichthyes: Rajiformes) Table 1 Morphometrics and meristics of male and female Jensen’s ray Amblyraja jenseni from different areas of the North Atlantic (significant differences are given in bold, number of specimens examined are shown in parentheses, m = standard error).
Females (7) Males (6) Character Absolute % TL Absolute % TL Min Max Mean Min Max Mean ±
m Min Max Mean Min Max Mean ±
m TL, mm 369.0 1065.0 686.6 223.0 1113.0 635.0 Disc width 264.0 795.0 510.4 69.5 81.3 74.2 ± 1.51 156.5 837.0 466.4 70.2 75.5 73.3 ± 0.91 length 207.0 593.0 390.5 55.7 60.0 57.1
±
0.60 119.8 632.0 351.5 51.9 56.8 55.1
±
0.79 Snout length, preorbital 61.2 157.0 103.3 14.0 16.6 15.2 ± 0.31 32.1 174.0 89.6 10.3 15.8 14.2
0.84 preoral 54.9 135.0 92.9 11.6 16.3 13.6 ± 0.71 37.1 149.0 88.7 12.6 16.9 14.5 ± 0.65 prenasal 38.7 80.3 65.0 7.5 10.6 9.7 ± 0.72 29.9 115.0 66.8 7.4 11.1 9.7 ± 0.81 Orbit, horizontal diameter 10.6 40.0 27.0 2.5 5.8 4.2
±
0.52 9.2 22.0 16.1 1.8 4.7 3.1
±
0.52 Interorbital width 27.8 68.1 46.1 6.0 7.8 6.8 ± 0.26 13.8 77.2 47.4 6.2 11.1 7.5 ± 0.75 Spiracle length 11.2 34.4 19.6 2.3 3.4 3.0 ± 0.16 5.6 37.3 20.4 2.5 3.8 3.1 ± 0.18 Interspiracular width 40.8 110.0 75.8 10.3 12.0 11.1 ± 0.19 23.6 115.0 74.4 10.2 15.8 11.7 ± 0.85 Orbit + spiracle length 20.9 56.3 42.2 5.3 6.9 6.2 ± 0.33 16.2 60.0 39.9 4.8 7.2 5.8 ± 0.41 D1, height 6.0 42.0 17.3 1.5 4.9 2.3 ± 0.46 3.8 25.6 13.2 1.7 2.3 2.0 ± 0.10 base length 17.8 47.0 30.7 4.3 5.4 4.7 ± 0.16 11.2 48.9 28.4 3.9 5.0 4.6 ± 0.16 D2, height 5.6 28.0 14.4 1.3 3.3 2.0 ± 0.25 3.3 30.4 13.8 1.5 2.7 2.0 ± 0.18 base length 19.7 44.6 32.3 4.2 5.8 5.0 ± 0.27 8.8 53.0 29.8 3.3 5.2 4.5 ± 0.29 Interdorsal space 0.0 29.0 6.3 0.0 3.4 0.9 ± 0.44 0.0 3.1 1.3 0.0 1.1 0.4 ± 0.20 C, base length 13.1 28.3 20.1 2.4 3.6 3.0 ± 0.28 10.9 25.0 18.0 2.2 4.0 2.7 ± 0.34 Tail, postdorsal length 14.1 45.0 23.9 2.4 5.3 3.5 ± 0.49 8.7 30.0 18.1 2.2 5.5 3.3 ± 0.51 height at V-tips 8.9 25.3 17.0 2.4 2.7 2.5
±
0.06 6.8 23.0 15.9 2.0 2.5 2.3
±
0.10 width at V-tips 11.4 30.3 21.1 2.7 3.6 3.1 ± 0.18 8.1 31.7 21.5 2.8 3.6 3.1 ± 0.14 height at D1 origin 4.2 9.8 7.0 0.9 1.2 1.0 ± 0.06 3.0 11.0 7.2 0.8 1.3 1.0 ± 0.07 width at D1 origin 4.9 13.5 8.5 0.9 1.6 1.3 ± 0.12 4.2 14.3 9.1 1.1 1.6 1.3 ± 0.08 lateral fold length 143.0 337.0 243.0 31.6 38.8 36.4 ± 1.62 107.0 345.0 235.6 30.5 39.6 34.2 ± 1.81 Head length, ventrally 105.3 281.0 205.3 26.4 33.3 30.4 ± 1.32 77.9 309.0 212.4 27.8 34.5 30.2 ± 1.22 Mouth width 45.5 157.0 93.3 11.9 15.9 13.3 ± 0.58 27.9 150.0 84.7 12.3 14.5 13.0 ± 0.35 Internasal width 46.6 126.0 84.1 11.8 13.0 12.4 ± 0.22 28.5 133.0 76.5 11.1 13.7 12.3 ± 0.36 Nasal curtain, length 20.5 56.4 34.6 3.7 5.6 5.1 ± 0.35 18.0 65.3 36.3 3.4 6.7 5.4 ± 0.56 width each lobe 10.0 23.6 13.8 1.5 2.8 2.1 ± 0.24 6.8 29.0 18.5 1.9 4.2 2.6 ± 0.41 space between lobes 30.4 107.0 65.7 8.2 10.1 9.4 ± 0.34 21.8 115.0 70.5 7.8 12.1 9.7 ± 0.85 Gill slit length, first 5.2 14.2 8.7 1.3 1.4 1.3 ± 0.02 2.9 18.5 9.6 1.3 1.7 1.4 ± 0.09 third 5.4 16.8 9.9 1.3 1.6 1.5
±
0.05 3.6 22.5 12.1 1.6 2.0 1.7
±
0.07 fifth 4.4 14.9 7.3 0.9 1.4 1.1 ± 0.08 2.2 16.9 8.2 0.9 1.5 1.2 ± 0.12 Space btwn first gill slits 68.7 186.0 137.5 17.5 22.1 20.2 ± 0.62 42.1 225.0 135.1 16.3 24.8 20.4 ± 1.43 fifth gill slits 52.3 139.0 104.9 13.1 18.1 15.6
±
0.74 31.2 170.0 87.2 10.5 16.4 13.4
±
1.10 V-length, anterior lobe 55.7 123.0 81.0 11.5 15.1 12.5 ± 0.54 23.9 143.0 78.2 10.7 15.2 12.4 ± 0.63 posterior lobe 74.6 206.0 131.5 18.1 20.2 19.3 ± 0.36 54.0 229.0 138.3 16.7 20.6 19.0 ± 0.81 Clasper, postanus length na na na na na na 20.5 240.0 116.9 7.6 23.2 13.5 ± 3.51 Snout tip to center of anus 196.0 625.0 367.8 52.8 58.7 55.2 ± 1.02 114.8 678.0 359.1 51.1 60.9 54.8 ± 1.65 to max. disc width 142.0 358.0 259.2 33.6 42.6 38.6 ± 1.44 105.0 400.0 255.8 31.4 39.7 36.5 ± 1.63 Center of anus to D1 121.0 356.0 223.8 30.4 34.8 32.5
±
0.52 74.9 349.0 180.8 17.1 33.6 29.3
±
2.52 to D2 139.0 398.0 264.3 35.4 39.7 37.2
±
0.59 104.0 390.0 246.4 30.2 38.5 34.9
±
1.39 to tail tip 175.0 470.0 306.7 42.7 47.4 45.0 ± 0.81 108.2 475.0 270.5 38.1 48.5 43.7 ± 1.47 Snout angle 85 91 88.0 ± 3.00 89 103 94.0 ± 4.51 No. preorbital thorns 1 2 1.6 ± 0.24 1 3 2.0 ± 0.32 No. postorbital thorns 1 2 1.8 ± 0.20 1 2 1.8 ± 0.20 No. interspiracular thorns 1 2 1.6 ± 0.24 1 2 1.4 ± 0.24 No. scapular thorns 3 5 4.0 ± 0.45 3 6 4.0 ± 0.63 No. nuchal thorns 1 2 1.6 ± 0.24 0 2 1.6 ± 0.40 No. interscapular thorns 1 1 1.0 ± 0.00 1 3 1.4 ± 0.40 No. median thorns 23 28 25.0 ± 0.95 20 31 24.4 ± 1.91 No. middorsal thorns 0 1 0.2 ± 0.20 0 1 0.2 ± 0.20 Tooth rows upper jaw 52 63 58.5 ± 2.53 59 64 61.3 ± 1.11 lower jaw 54 61 57.3 ± 1.89 52 64 57.8 ± 2.53