ISSN : 2287-8327
To determine the age structure of a Hynobius leechii breeding population and analyze relationships between the order of entrance to breeding ponds and physical parameters and age, we studied a wild population of the species in the Research Forests of Kangwon National University in Chuncheon, Kangwon, South Korea from March 16 to April 13, 2005. The age of breeding males ranged one to nine years old and that of females ranged from three to nine years old. The asymptotic sizes of males and females were 6.36 and 6.51 cm, respectively, and the growth coefficients of males and females were 0.71 and 0.81, respectively. The snout-vent length (SVL), head length, and body mass of males were all positively correlated with their age, but female age did not show a significant relationship with any physical parameter. The tail depth, body mass, and condition factors (SVL/body mass × 100) of both males and females were negatively related with the order of entrance to the breeding pond. The head width and SVL of males were also negatively correlated with the order of entrance, but the SVL of females was positively related with the order of entrance. These results suggest that physical parameters are more important determinants of breeding migration patterns than age. We discuss which of two hypotheses, the mate opportunity hypothesis and the susceptibility hypothesis, is better able to explain the order of entrance to breeding ponds for male and female H. leechii.
Atkinson D, Sibly RM. 1997. Why are organisms usually bigger in colder environments? Making sense of a life-history puzzle. Trends Ecol Evol 12: 235-239.
Brattstrom BH. 1963. A preliminary review of the thermal requirements of amphibians. Ecology 44: 238-255.
Dent JN. 1975. Integumentary effects of prolactin in the lower vertebrates. Amer Zool 15: 923-935.
Dolbeer RA. 1982. Migration patterns for age and sex classes of blackbirds and starlings. J Field Ornithol 53: 28-46.
Douglas ME. 1979. Migration and sexual selection in Ambystoma jeffersonianum. Can J Zool 57: 2303-2310.
Eden CJ, Whiteman HH, Duobinis-Gray L, Wissinger SA. 2007. Accuracy assessment of skeletochronology in the Arizona tiger salamander (Ambystoma tigrinum nebulosum). Copeia 2007: 471-477.
Ento K, Matsui M. 2002. Estimation of age structure by skeletochronology of a population of Hynobius nebulosus in a breeding season (Amphibia, Urodela). Zool Sci 19: 241-247.
Finkler MS. 2006. Effects of temperature, sex, and gravidity on the metabolism of small-mouthed salamanders, Ambystoma texanum, during the reproductive season. J Herpetol 40: 103-106.
Gauthreaux SA Jr. 1978. The ecological significance of behavioral dominance. In: Perspectives in Ethology, Vol 3 (Bateson PPG, Klopfer PH, eds). Plenum Press, New York, pp 17-54.
Hasumi M, Kanda F. 2007. Phenological activity estimated by movement patterns of the siberian salamander near a fen. Herpetologia 63: 163-175.
Hemelaar A. 1985. An improved method to estimate the number of year rings resorbed in phalanges of Bufo bufo and its application to populations from different latitudes and altitudes. Amphibia-Reptilia 6: 323-341.
Iwasa Y, Odendaal JF, Murphy DD, Ehrlich PR, Launer AE. 1983. Emergence patterns in male butterflies: a hypothesis and a test. Theor Pop Biol 23: 363-379.
Jeon JK, Ji CS, Park DS. 2005. Water vibrations play role in malemale competition of Hynobius leechii. Integ Biosci 9: 156
Ketterson ED, Nolan VJ. 1976. Geographic variation and its climatic correlates in the sex ratio of eastern-wintering dark-eyed juncos (Junco byemalis byemalis). Ecology 57: 679-693.
Ketterson ED, Nolan VJ. 1983. The evolution of differential bird migration. In: Current Ornithology, Vol 1 (Johnston RF, ed). Plenum Press, New York, pp 357-402.
Leary CJ, Fox DJ, Shepard DB, Garcia AM. 2005. Body size, age, growth and alternative mating tactics in toads: satellite males are smaller but not younger than calling males. Anim Behav 70: 663-671.
Lee JH, Ra NY, Eom JH, Park D. 2008. Population dynamics of the long-tailed clawed salamander larva, Onychodactylus fischeri, and its age structure in Korea. J Ecol Field Biol 31: 31-36.
Lodé T, Holveck MJ, Lesbarrères D. 2005. Asynchronous arrival pattern, operational sex ratio and occurrence of multiple paternities in a territorial breeding anuran, Rana dalmatina. Biol J Linn Soc 86: 191-200.
Misawa Y, Matsui M. 1999. Age determination by skeletochronology of the Japanese Salamander, Hynobius kimurae (Amphibia, Urodela). Zool Sci 16: 845-851.
Miwa T. 2007. Conditions controlling the onset of breeding migration of the Japanese mountain stream frog, Rana sakuraii. Naturwissenschaften 94: 551-560.
Morbey YE, Ydenberg RC. 2001. Protandrous arrival timing to breeding areas: a review. Ecol Lett 4: 663-673.
Park D, Park SR. 2000. Multiple insemination and reproductive biology of Hynobius leechii. J Herpetol 34: 594-598.
Park SR, Park DS, Yang SY. 1996. Courtship, fighting behaviors and sexual dimorphism of the salamander, Hynobius leechii. Korean J Zool 39: 437-446.
Pool TB, Dent JN. 1977. Ultrastrcture and hormonal control of product synthesis in hedonic glands of red-spotted newt, Notophthalmus viridescens. J Exp Zool 201: 177-201.
Presnell JK, Schreibman MP. 1997. Humason's Animal Tissue Techniques. Johns Hopkins University Press, Baltimore, pp 101-118.
Reading CJ. 2001. Non-random pairing with respect to past breeding experience in the common toad (Bufo bufo). J Zool 255: 511- 518.
Ryan TJ, Hopkins WA. 2000. Interaction of sex and size and the standard metabolic rate of paedomorphic Ambystoma talpoideum: size does matter. Copeia 2000: 808-812.
Semlitsch RD, Scott DE, Pechmann J, Gibbons JW. 1993. Phenotypic variation in the arrival time of breeding salamanders: individual repeatability and environmental influences. J Anim Ecol 62: 334-340.
Smith AM, Green DM. 2006. Sex, isolation and fidelity: unbiased longdistance dispersal in a terrestrial amphibian. Ecography 29: 649-658.
Sung HC, Lee JH, Park D. 2005. Entering and exiting routes of Hynobius leechii to a breeding site and staying time within the site. Korean J Ecol 28: 237-243.
Trenham PC, Shaffer HB, Koenig WD, Stromberg MR. 2000. Life history and demographic variation in the California tiger salamander (Ambystoma californiense). Copeia 2000: 365-377.
von Bertalanffy L. 1938. A quantitative theory of organic growth. Hum Biol 10: 181-213.
Wake DB, Castanet J. 1995. A skeletochronological study of growth and age in relation to adult size in Batrachoseps attenuatus. J Herpetol 29: 60-65.
Wang G, Greenfield MD, Shelly TE. 1990. Inter-male competition for high-quality host-plants: the evolution of protandry in a territorial grasshopper. Behav Ecol Sociobiol 27: 191-198.
Wiklund C, Solbreck C. 1982. Adaptive versus incidental explanations for the occurrence of protandry in a butterfly, Leptidea sinapis L. Evolution 36: 56-62.
Woodrey MS, Chandler CR. 1997. Age-related timing of migration: geographic and interspecific patterns. Wilson Bull 109: 52-67.