[1].High Altitude Frogs (Rana kukonoris) Adopt a Diversified Bet-hedging Strategy in the Face of Environmental Unpredictability[J].Asian Herpetological Research,2018,9(1):43-49.[doi:10.16373/j.cnki.ahr.170073]
 Wei CHEN,*,Liqing PENG,et al.High Altitude Frogs (Rana kukonoris) Adopt a Diversified Bet-hedging Strategy in the Face of Environmental Unpredictability[J].Asian Herpetological Research(AHR),2018,9(1):43-49.[doi:10.16373/j.cnki.ahr.170073]

High Altitude Frogs (Rana kukonoris) Adopt a Diversified Bet-hedging Strategy in the Face of Environmental Unpredictability()

Asian Herpetological Research[ISSN:2095-0357/CN:51-1735/Q]



High Altitude Frogs (Rana kukonoris) Adopt a Diversified Bet-hedging Strategy in the Face of Environmental Unpredictability
Wei CHEN1* Liqing PENG1 Lichun JIANG1 David A. PIKE2 Christopher R. FRIESEN3 and Gregory BROWN3
1 Ecological Security and Protection Key Laboratory of Sichuan Province, Mianyang Normal University, Mianyang 621000, China
2 Department of Biology, Rhodes College, Memphis Tennessee 38111, USA
3 School of Life and Environmental Sciences, University of Sydney, New South Wales 2006, Australia
altitude bet-hedging strategy environmental quality egg size within-clutch variation unpredictable environment
Environmental unpredictability can influence strategies of maternal investment among eggs within a clutch. Models predict that breeding females should adopt a?diversified?bet-hedging strategy?in unpredictable environments, but empirical field evidence from Asia is scarce. Here we?tested?this hypothesis by exploring spatial patterns in egg size along an altitudinal gradient in a frog species?(Rana kukunoris) inhabiting the Tibetan Plateau.?Within-clutch variability in egg size increased as the environment became variable (e.g., lower mean monthly temperature and mean monthly rainfall at higher altitudes), and populations in environments with more unpredictable rainfall?produced eggs that were smaller and more variable in size. We provide support for a diversified bet-hedging strategy in high-altitude environments, which experience dynamic weather patterns and therefore are of unpredictable environmental quality. This strategy may be an adaptive response to lower environmental quality and higher unpredictable environmental variance. Such a strategy should increase the likelihood of breeding success and?maximize maternal?lifetime fitness by producing offspring that are adapted to current environmental conditions.?We speculate that in high-altitude environments prone to physical disturbance, breeding females are unable to consistently produce the optimal egg size due to physiological constraints imposed by environmental conditions (e.g., duration of the active season, food availability).?Species and populations whose breeding strategies are adapted to cope with uncertain environmental conditions by adjusting offspring size and therefore quality show a remarkable degree of ability to cope with future climatic changes.


Abramoff M., Magalhaes P., Ram S. 2004. Image processing with Image J. Biophotonics Int 11, 36–42
Capinera J. L. 1979. Qualitative variation in plants and insects: effect of propagule size on ecological plasticity.?Am Nat, 114: 350–361
Chen W., Tang Z. H., Fan X. G., Wang Y., Pike D. A. 2013. Maternal investment increases with altitude in a frog on the Tibetan Plateau.?J Evolution Biol, 26: 2710–2715
Chen W., Yu T. L., Lu X. 2011. Age and body size of?Rana kukunoris, a high-elevation frog native to the Tibetan Plateau.?Herpetol J,?21: 49–151
Colwell R. K. 1974.?Predictability, constancy and contingency of periodic phenomena.?Ecology, 55: 1148–1153
Crump M. L. 1981. Variation in propagule size as a function of environmental uncertainty for tree frogs.?Am Nat,?117: 724–737
Duellman W. E., Trueb D. L. 1986.?Biology of Amphibians. New York: McGraw-Hill Inc
Dziminski M. A., Vercoe P. E. Dale R. J. 2009. Variable offspring provisioning and fitness: a direct test in the field.?Funct Ecol,?23: 164–171
Einum S., Fleming I. A. 2002. Does within-population variation in fish egg size reflect maternal influences on optimal values??Am Nat,?160: 756–765
Einum S., Fleming I. A. 2004. Environmental unpredictability and offspring size: conservative versus diversified bet-hedging.?Evol Ecol Res, 6: 443–455
Fox C. W., Czesak M. E. 2000. Evolutionary ecology of progeny size in arthropods.?Annu Rev Entomol, 45: 341–369
Gosner K. L. 1960. A simplified table for staging anuran embryos and larvae with notes on identification.?Herpetologica, 16: 183–190
Johnston T. A., Leggett W. C. 2002. Maternal and environmental gradients in the egg size of an iteroparous fish.?Ecology, 83: 1777–1791
Kaplan R. H., Cooper W. S. 1984. The evolution of developmental plasticity in reproductive characteristics: an application of the ‘‘adaptive coin-flipping’’ principle.?Am Nat,?123: 393–410
Koops M. A., Hutchings J. A., Adams B. K. 2003. Environmental predictability and the cost of imperfect information: influences on offspring size variability.?Evol Ecol Res, 5: 29–42
Lu X., Zeng X. H., Du B., Nie C. 2008. Reproductive ecology of?Rana kukunoris?Nikolskii, 1918, a high-elevation frog native to the Tibetan Plateau.?Herpetozoa, 21: 67–77
Marshall D. J., Bonduriansky R.,?Bussière L. F. 2008. Offspring size variation within broods as a bet-hedging strategy in unpredictable environments.?Ecology, 89: 2506–2517
Marshall D. J., Burgess S. C. 2015.??Deconstructing environmental predictability: seasonality, environmental color and the biogeography of marine life histories.?Ecol. Lett, 18: 174–181
McGinley M. A.,?Temme D. H.,?Geber?M. A. 1987. Parental investment in offspring in variable environments: theoretical and empirical considerations.?Am Nat, 130: 370–398
Morrison C., Hero J. M. 2003. Geographic variation in life-history characteristics of amphibians: A review.?J Anim Ecol, 72: 270–279
Morrongiello J. R., Bond N. R., Crook D. A., Wong B. B. M. 2012. Spatial variation in egg size and egg number reflects trade-offs and bet-hedging in a freshwater fish.?J Anim Ecol, 81: 806–817
Parker G. A., Begon M. 1986. Optimal egg size and clutch size: effects of environment and maternal phenotype.?Am Nat,?128: 573–592
Philippi T., Seger J. 1989. Hedging one’s evolutionary bets, revisited. Trends in Ecol Evol, 4: 41–44
Quinn G. P., Keough M. J. 2002. Experimental design and data analysis for biologists. Cambridge: Cambridge University Press
R?s?nen K., S?derman F., Laurila A., Meril? J. 2008. Geographic variation in maternal investment: acidity affects egg size and fecundity in?Rana arvalis.?Ecology, 89: 2553–2562
Semmens D. 2008. Maternal Effects on Offspring Fitness in an Australian Native Fish,?Galaxias maculatus. PhD dissertation, University of Melbourne, Melbourne, Australia
Shama L. S. 2015. Bet hedging in a warming ocean: predictability of maternal environment shapes offspring size variation in marine sticklebacks.?Global Change Biol, 21: 4387–4400
Shine R. 1978. Propagule size and parental care: the “safe harbour” hypothesis.?J Theor Biol, 75: 417–424
Simons A. M. 2011. Modes of response to environmental change and the elusive empirical evidence for bet hedging.?P Roy Soc B Bio, 278: 1601–1609
Simons A. M. 2014. Playing smart vs. playing safe: the joint expression of phenotypic plasticity and potential bet hedging across and within thermal environments.?J Evol Biol,?27: 1047–1056
Strarns S. C. 1992. The evolution of life histories. New York: Oxford university press
Travis J. 1980. Phenotypic variation and the outcome of interspecific competition in hylid tadpoles.?Evolution, 34: 40–50
Tremblay I., Thomas D. W., Lambrechts M. M., Blondel J., Perret P. 2003. Variation in Blue Tit breeding performance across gradients in habitat richness.?Ecology, 84: 3033–3043
van den Berghe E. P., Gross M. R. 1989. Natural selection resulting from female breeding competition in a Pacific salmon (Coho:?Oncorhynchus kisutch).?Evolution, 43: 125–140
Vaughton G., Ramsey M. 1998.Sources and consequences of seed mass variation in?Banksia marginata?(Proteaceae).?J Ecol, 86: 563–573
Wells K. D. 2007. The ecology and behavior of amphibians.?The University of Chicago: Chicago Press
Zovi D., Stastny M., Battisti A., Larsson S. 2008. Ecological costs on local adaptation of an insect herbivore imposed by host plants and enemies.?Ecology, 89: 1388–1398

更新日期/Last Update: 2018-03-27