Korean Journal of Environment and Ecology (한국환경생태학회지)

Korean Society of Environment and Ecology (한국환경생태학회)
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Sexual Size Dimorphism in the Red-tongued viper snake(Gloydius ussuriensis) of Population

쇠살모사 개체군의 성적 크기이형

  • Received : 2014.07.28
  • Accepted : 2014.10.13
  • Published : 2014.10.31
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Abstract

This study was conducted to investigate the body size, sexual size dimorphism (SSD), and related environmental factors between Red-tongued viper snakes (Gloydius ussuriensis) inhabiting two different places, i.e., Jeju Island and its islet Gapado, and to provide data required to maintain species diversity from May, 2006 until June, 2009. The snout-vent length of the Red-tongued viper snake population inhabiting Jeju Island was found to be 242-532 mm ($422.0{\pm}46.7mm$, n = 100) in females and 296-580 mm ($434.5{\pm}51.7mm$, n = 63) in males. In contrast, the snout-vent length was observed to be 205-395 mm ($335{\pm}43.6mm$, n = 55) in female and 215-430 mm ($328{\pm}39.4mm$, n = 73) in male Red-tongued viper snakes inhabiting Gapado. These data demonstrated the snout-vent length of both female and male Red-tongued viper snakes on Jeju Island to be larger than those on Gapado (Female t = 17.343, df = 115, P<0.001; Male = 19.128, df = 101, P<0.001). SSD was measured to be -0.03 in the Red-tongued viper snake population on Jeju Island, with more or less larger sizes in the males, while it was 0.02 in the Red-tongued viper snake population in the Gapado, with a little larger sizes in the females. The reason for this difference in the snake populations between Jeju Island and Gapado may be due to adaption to the different ecological environments. In addition, as SSD, the snout-vent length of the Red-tongued viper snake populations and in young vipers was somewhat higher in the males than in the females on Jeju Island (t = -2.011, df = 117, P<0.05). However, no significant differences were observed in the snout-vent length of the young and the general Red-tongued viper snake populations on Gapa Island. For the population on Jeju island, the head length (F = 6.318, $df_{1,2}$=1,117, P<0.05), head width (F=8.090, $df_{1,2}$=1,117, P<0.01), inter eye length (F=15.898, $df_{1,2}$=1,117, P<0.001), and tail length (F=238.488, $df_{1,2}$=1,111, P<0.001) were all larger in the males, while females showed higher body mass (F=64.111, $df_{1,2}$=1,114, P<0.001). In the case of the Gapa Island population, no significant differences in the head length, head width, and inter eye length between females and males were observed, while the males had a longer tail length (F=168.555, $df_{1,2}$=1,74, P<0.001) and the females were heavier (F=17.812, $df_{1,2}$=1,76, P<0.001). Though no significant differences were found in the head length, head width, and inter eye length, the tail length (F=67.793, $df_{1,2}$=1,72, P<0.001) and body mass (F=4.558, $df_{1,2}$=1,72, P<0.05) were higher in the young male Red-tongued viper snakes than in the females. The snout-vent length, head length, head width, and inter eye length, which did not display SSD in the young Red-tongued viper snake populations, were higher in the male Red-tongued viper snake populations than in the female population from Jeju Island, implying that SSD in the Red-tongued viper snake population on Jeju Island is expressed due to environmental effects during their growth.

이 연구는 2006년 5월부터 2009년 6월까지 제주도와 작은 부속섬인 가파도 두 지역에 서식하는 쇠살모사 개체군간 몸의 크기와 성적크기이형 및 이에 따른 환경요인을 밝히고, 종 다양성 유지에 필요한 자료를 제공하기 위하여 이루어졌다. 연구결과, 제주도 개체군의 몸길이는 암컷 242-532mm ($422.0{\pm}46.7mm$, n = 100), 수컷 296-580mm ($434.5{\pm}51.7mm$, n = 63)이었고, 가파도 개체군의 몸길이는 암컷 205-395mm ($335{\pm}43.6mm$, n = 55), 수컷 215-430mm ($328{\pm}39.4mm$, n = 73)으로 암수 모두 제주도 개체군이 가파도 개체군에 비해 큰 것으로 나타났다(암컷 t = 17.343, df = 115, P<0.001; 수컷 t = 19.128, df = 101, P<0.001). 성적크기이형 지수(SSD)는 제주도 개체군이 -0.03으로 수컷이 다소 크고, 가파도 개체군은 0.02로 암컷이 다소 컸다. 이처럼 제주도 개체군과 가파도 개체군이 몸의 크기에 있어 차이가 나타나는 것은 서로 다른 환경에 적응된 결과라 판단된다. 또한 두 지역 개체군 및 새끼의 성적크기이형은 제주도 개체군의 몸길이는 수컷이 암컷보다 다소 컸으나(t = -2.011, df = 117, P<0.05), 가파도 개체군과 새끼에서는 유의한 차이가 없었다. 제주도 개체군에서 머리 길이(F = 6.318, $df_{1,2}$ = 1,117, P<0.05), 머리 폭(F = 8.090, $df_{1,2}$ = 1,117, P<0.01), 눈 사이 거리(F = 15.898, $df_{1,2}$ = 1,117, P<0.001) 및 꼬리 길이(F = 238.488, $df_{1,2}$ = 1,111, P<0.001)에서 수컷이 암컷보다 컸으며, 체중은 암컷이 수컷보다 무거운 것으로 나타났다(F = 64.111, $df_{1,2}$ = 1,114, P<0.001). 가파도 개체군에서는 머리 길이, 머리 폭, 눈 사이 거리에서는 암컷과 수컷 간에 유의한 차이는 없었고, 꼬리 길이에서 수컷이 암컷보다 길었으며(F = 168.555, $df_{1,2}$ = 1,74, P<0.001), 체중은 암컷이 수컷보다 무거운 것으로 나타났다(F = 17.812, $df_{1,2}$ = 1,76, P<0.001). 새끼에서는 머리길이, 머리 폭, 눈 사이 거리에서 유의한 차이가 없었으나, 꼬리 길이(F = 67.793, $df_{1,2}$ = 1,72, P<0.001)와 체중(F = 4.558, $df_{1,2}$ = 1,72, P<0.05)에서 수컷이 암컷보다 크게 나타났다. 새끼에서 성적크기이형 현상이 나타나지 않았던 몸길이, 머리길이, 머리 폭 및 눈 사이 거리가 제주도 개체군에서는 모두 수컷이 암컷보다 큰 것으로 나타나 제주도 개체군에서의 성적크기이형 현상은 성장과정에서 생기는 것이라 판단된다.

Keywords

References

  1. Andersson, M.(1994) Sexual selection. Princeton University Press, Princeton.
  2. Ashton, K.G.(2001) Body size variation among mainland populations of the western rattlesnake (Crotalus viridis). Evolution 55(12): 2523-2533. https://doi.org/10.1111/j.0014-3820.2001.tb00766.x
  3. Bertona, M. and M. Chiaraviglio(2003) Reproductive biology, mating aggregations, and sexual dimorphism of the Argentine Boa Constrictor (Boa constrictor occidentalis). Journal of Herpetology 37(3): 510-516. https://doi.org/10.1670/122-02A
  4. Bizerra, A., O.A.V. Marques and I. Sazima(2005) Reproduction and feeding of the colubrid snake Tomodon dorsatus from south-eastern Brazil. Amphibia-Reptilia 26: 33-38. https://doi.org/10.1163/1568538053693350
  5. Boback, S.M.(2003) Body size evolution in snakes: Evidence from island populations. Copeia 2003(1): 81-94. https://doi.org/10.1643/0045-8511(2003)003[0081:BSEISE]2.0.CO;2
  6. Boback, S.M. and C. Guyer(2003) Epirical evidence for an optimal body size in snake. Evolution 57(2): 345-351. https://doi.org/10.1111/j.0014-3820.2003.tb00268.x
  7. Brown, G.P. and R. Shine(2002) Reproductive ecology of a tropical natricine snake, Tropidonophis mairii (Colubridae). Journal of Zoology (London) 258: 63-72. https://doi.org/10.1017/S0952836902001218
  8. Houston, D. and R. Shine(1993) Sexual dimorphism and niche divergence: feeding habits of the Arafura filesnake. Journal of Animal Ecology 62: 737-748. https://doi.org/10.2307/5393
  9. Kamosawa, M. and H. Ota(1996) Reproductive biology of the Brahminy blind snake (Ramphotyphlops braminus) from the Ryukyu archipelago, Japan. Journal of Herpetology 30(1): 9-14. https://doi.org/10.2307/1564700
  10. Kim, B.S. (2011) A study on the ecology of the ussuri mamushi Gloydius ussuriensis from Jeju Island, Korea. Ph. D. Dissertation, Jeju National University, 86pp. (in Korean with English abstract).
  11. Lomolino. M.V.(2005) Body size evolution in insular vertebrates: generality of the island rule. Journal of Biogeography 32: 1683-1699. https://doi.org/10.1111/j.1365-2699.2005.01314.x
  12. Madsen, T. and R. Shine(1993) Phenotypic plasticity in body sizes and sexual size dimorphism in European grass snakes. Evolution 47: 321-325. https://doi.org/10.2307/2410141
  13. Madsen, T. and R. Shine(2000) Silver spoons and snake body sizes: prey availability early in life influences long-term growth rates of free-ranging pythons. Journal of Animal Ecology 69: 952-958. https://doi.org/10.1046/j.1365-2656.2000.00477.x
  14. Martins, M., M.S. Araujo, R. J. Sawaya and R. Nunes(2001) Diversity and evolution of macrohabitat use, body size and morphology in a monophyletic group of Neotropical pitvipers (Bothrops). Journal of Zoology (London) 254: 529-538. https://doi.org/10.1017/S0952836901001030
  15. Pleguezuelos, J.M. and M. Feriche(1999) Reproductive ecology of the Horseshoe whip snake (Coluber hippocrepis). Journal of herpetology 33(2): 202-207. https://doi.org/10.2307/1565715
  16. Rivas, J.A. and G.M. Burghardt(2001) Understanding sexual size dimorphism in snakes: wearing the snake's shoes. Animal behaviour 62: F1-F6. https://doi.org/10.1006/anbe.2001.1755
  17. Seigel, R.A., J.T. Collins and S. S. Novak(2001) Snakes: Ecology and evolutionary biology. The Blackburn Press, caldwell, New Jersey, pp. 1-529.
  18. Shine, R.(1978) Sexual size dimorphism and male combat in snakes. Oecologia (Berl.) 33: 269-277. https://doi.org/10.1007/BF00348113
  19. Shine, R.(1993) Sexual dimorphism. In: Snakes: ecology and behavior (ed. R. Seigel and J. Collins), New York: McGraw-Hill, pp. 49-86.
  20. Shine, R.(1994) Sexual Size Dimorphism in snakes Revised. Copeia 1994(2): 326-346. https://doi.org/10.2307/1446982
  21. Shine, R., M.M. Olsson, I.T. Moore, M.P. LeMaster and R.T. Mason(1999) Why do male snakes have longer tails than females? Proceedings of the Royal Society B 266: 2147-2151. https://doi.org/10.1098/rspb.1999.0901
  22. Taylor, E.N. and D.F. Denardo(2005) Sexual Size Dimorphism and Growth Plasticity in Snakes: and Experiment on the Western Diamond-Backed Rattlesnake (Crotalus atrox). Journal of Experimental Zoology 303A: 598-607. https://doi.org/10.1002/jez.a.189
  23. Vincent, S.E., A. Herrel and D.J. Irschick(2004) Sexual dimorphism in head shape and diet in the cottonmouth snake (Agkistrodon piscivorus). Journal of Zoology (London) 264: 53-59. https://doi.org/10.1017/S0952836904005503
  24. Whittaker, R.J. and J.M. Fernandez-Palacios(2007) Island biogeography-ecology, evolution, and conservation. Oxford university press, pp. 1-401.
  25. Zhao, E. and K. Adler(1993) Herpetology of China. Society for the Study of Amphibians and Reptiles in Cooperation with the Chinese Society for the Study of Amphibians and Reptiles, Oxford.