Abstract
Natural environments tend to be variable resulting in alternating periods of high and low food availability. Therefore, animals have to be able to accommodate to sudden environmental changes by adjusting their physiology and behaviour to new conditions. We investigated how simulated food variability affects life history traits (asexual reproduction and stress tolerance) and response to environmental change in laboratory experiments with green hydra (Hydra viridissima). We assigned hydra into four groups differing in feeding frequency (high or low) and food regularity (random or stable). After 21 days of accommodation, feeding frequency was changed (increased or decreased) in half of each group, the other half was kept as a control group. Hydra showed a delayed response to environmental change (increased or decreased feeding frequency). This delay in response was greater under an unpredictable feeding scheme. Animals on a random scheme had lower budding rates and lower stress tolerance. Follow-up experiments suggest that this might be due to receiving food on subsequent days, since we found that animals fed daily have lower budding rates than those fed on alternate days. We hypothesize that frequent feeding might cause high levels of oxidative/xenobiotic stress which could overwhelm the defence system of these animals.
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References
Bode H.R., Flick K.M. & Bode P.M. 1977. Constraints on the relative sizes of the cell populations in Hydra attenuata. J. Cell Sci. 24: 31–50. PMID: 893548
Bosch T.C. 2012. What Hydra has to say about the role and origin of symbiotic interactions. Biol. Bull. 223 (1): 78–84. PMID: 22983034
Buzgariu W., Chera S. & Galliot B. 2008. Methods to investigate autophagy during starvation and regeneration in hydra. Methods in Enzymology 451: 409–437. DOI: https://doi.org/10.1016/S00766879(08)03226-6
Christensen R.H.B. 2013. Ordinal — Regression models for ordinal data. R package version 2013.9-30. https://doi.org/www.cran.r-project.org/package=ordinal/package=ordinal (accessed 10.02.2015)
Davies K.J. 1999. The broad spectrum of responses to oxidants in proliferating cells: a new paradigm for oxidative stress. IUBMB Life. 48 (1): 41–47. DOI: https://doi.org/10.1080/713803463
DeWitt, T.J., Sih, A. & Wilson, D.S. 1998. Costs and limits of phenotypic plasticity. Trends Ecol. Evol. 13 (2): 77–81. DOI: https://doi.org/10.1016/S0169-5347(97)01274-3
Félix M.-A. & Braendle C. 2010. The natural history of Caenorhabditis elegans. Curr. Biol. 20 (22): R965–R969. DOI: https://doi.org/dx.doi.org/10.1016/j.cub.2010.09.050
Finkel T. & Holbrook N.J. 2000. Oxidants, oxidative stress and the biology of ageing. Nature 408: 239–247. DOI: https://doi.org/10.1038/35041687
Flatt T., Amdam G.V., Kirkwood T.B.L. & Omholt S.W. 2013. Life-history evolution and the polyphenic regulation of somatic maintenance and survival. Q. Rev. Biol. 88 (3): 185–218. DOI: https://doi.org/10.1086/671484
Flatt T. & Heyland A. (eds). 2011. Mechanisms of life history evolution: the genetics and physiology of life history traits and trade-offs. Oxford University Press, New York, 506 pp. ISBN: 978-0-19-956876-5
Hecker B. & Slobodkin L.B. 1976. Responses of Hydra oligactis to temperature and feeding rate, pp. 175–183. DOI: https://doi.org/10.1007/978-1-4757-9724-4_19. In: Mackie G.O. (ed.), Coelenterate Ecology and Behavior, Springer, New York, 744 pp. ISBN: 978-1-4757-9726-8
Kaliszewicz A. 2015. Intensity-dependent response to temperature in hydra clones. Zool. Sci. 32 (1): 72–76. DOI: https://doi.org/10.2108/zs140052
Kaliszewicz A. & Lipinśka A. 2013. Environmental condition related reproductive strategies and sex ratio in hydras. Acta Zool. 94 (2): 177–183. DOI: https://doi.org/10.1111/j.14636395.2011.00536.x
Kelty M.O. & Cook C.B. 1976. Survival during starvation of symbiotic, aposymbiotic, and non-symbiotic hydra, pp. 409–414. DOI: https://doi.org/10.1007/978-1-4757-9724-4-43. In: Mackie G.O. (ed.), Coelenterate Ecology and behavior, Springer, New York, 744 pp. ISBN: 978-1-4757-9726-8
Kovačević G. 2012. Value of the hydra model system for studying symbiosis. Int. J. Dev. Biol. 56 (6-8): 627–635. DOI: https://doi.org/10.1387/ijdb.123510gk
Mair W., Piper M.D.W. & Partridge L. 2005. Calories do not explain extension of life span by dietary restriction in Drosophila. PLoS Biol. 3 (7): e223. DOI: https://doi.org/10.1371/journal.pbio.0030223
McNamara J.M., Fawcett T.W. & Houston A.I. 2013. An adaptive response to uncertainty generates positive and negative contrast effects. Science 340 (6136): 1084–1086. DOI: https://doi.org/10.1126/science.1230599
McNamara J.M., Trimmer P.C., Eriksson A., Marshall J.A.R. & Houston A.I. 2011. Environmental variability can select for optimism or pessimism. Ecol. Lett. 14 (1): 58–62. DOI: https://doi.org/10.1111/j.1461-0248.2010.01556.x
Nettle D., Frankenhuis W.E. & Rickard I.J. 2013. The evolution of predictive adaptive responses in human life history. Proc. R. Soc. B. 280 (1766): 20131343. DOI: https://doi.org/10.1098/rspb.2013.1343
Pearl R. 1928. The rate of living: being an account of some experimental studies on the biology of life duration. A.A. Knopf, New York, 185 pp.
Piersma T. & Drent J. 2003. Phenotypic flexibility and the evolution of organismal design. Trends Ecol. Evol. 18 (5): 228–233. DOI: https://doi.org/10.1016/S0169-5347(03)00036-3
Quinn B., Gagné F. & Blaise C. 2012. Hydra, a model system for environmental studies. Int. J. Dev. Biol. 56 (6-8): 613–625. DOI: https://doi.org/10.1387/ijdb.113469bq
R Core Team. 2014. R: A Language and Environment for Statistical Computing. Vienna, Austria. Retrieved from https://doi.org/www.R-project.org.
Reisa J.J. 1973. Ecology of Hydra, pp. 59–105. In: Burnett A.L. (ed.), Biology of Hydra, Academic Press, New York. ISBN: 0121459500, 9780121459505
Rion S. & Kawecki T.J. 2007. Evolutionary biology of starvation resistance: what we have learned from Drosophila. J. Evol. Biol. 20 (5): 1655–1664. DOI: https://doi.org/10.1111/j.14209101.2007.01405.x
Roff D.A. 2002. Life History Evolution. Sinauer, Sunderland, Massachussetts, 465 pp. ISBN: 978-0-87893-756-1
Schaible R., Ringelhan F., Kramer B.H. & Miethe T. 2011. Environmental challenges improve resource utilization for asexual reproduction and maintenance in hydra. Experimental Gerontology 46 (10): 794–802. DOI: https://doi.org/10.1016/j.exger.2011.06.004
Schaible R., Sussman M. & Kramer B.H. 2013. Aging and potential for self-renewal: hydra living in the age of aging-a mini-review. Gerontology 60 (6): 548–556. DOI: https://doi.org/10.1159/000360397
Schmidt K.A., Dall S.R. & Van Gils J.A. 2010. The ecology of information: an overview on the ecological significance of making informed decisions. Oikos 119 (2): 304–316. DOI: https://doi.org/10.1111/j.1600-0706.2009.17573.x
Speakman J.R. & Garratt M. 2014. Oxidative stress as a cost of reproduction: Beyond the simplistic trade-off model. BioEs-says 36 (1): 93–106. DOI: https://doi.org/10.1002/bies.201300108
Spear N.E. & Hill W.F. 1965. Adjustment to new reward: Simultaneous- and successive-contrast effects. J. Exp. Psychol. 70 (5): 510–519. DOI: https://doi.org/dx.doi.org/10.1037/0022580
Stearns S.C. 1992. The Evolution of Life Histories. Oxford University Press, London, 262 pp. ISBN: 978-0-19-857741-6
Rutherford C.L., Hessinger D. & Lenhoff H.M. 1983. Culture of sexually differentiated hydra, Chapter 11, pp. 71–77. DOI: https://doi.org/10.1007/978-1-4757-0596-6_12. In: Lenhoff H.M. (ed.), Hydra: Research Methods, Plenum Press, New York, 463 pp. ISBN: 978-1-4757-0598-0
Taborsky M. & Brockmann H.J. 2010. Alternative reproductive tactics and life history phenotypes, Chapter 18, pp. 537–586. DOI: https://doi.org/10.1007/978-3-642-02624-9-18. In: Kappeler P. (ed.), Animal Behaviour: Evolution and Mechanisms Springer, Berlin, 707 pp. ISBN: 978-3-642-02623-2
Tatar M., Chien S.A. & Priest N.K. 2001. Negligible senescence during reproductive dormancy in Drosophila melanogaster. Am. Nat. 158 (3): 248–258. DOI: https://doi.org/10.1086/321320
Tomczyk S., Fischer K., Austad S. & Galliot B. 2015. Hydra, a powerful model for aging studies. Int. J. Invertebr. Rep. Dev. 59 (Supp1): 11–16. DOI: https://doi.org/10.1080/07924259.2014.927805
Tökölyi J., McNamara J.M., Houston A.I. & Barta Z. 2012. Timing of avian reproduction in unpredictable environments. Evol. Ecol. 26 (1): 25–42. DOI: https://doi.org/10.1007/s10682-011-9496-4
Tökölyi J., Rosa M.E., Bradács F. & Barta Z. 2014. Life history trade-offs and stress tolerance in green hydra (Hydra viridissimita Pallas 1766): the importance of nutritional status and perceived population density. Ecol. Res. 29 (5): 867–876. DOI: https://doi.org/10.1007/s11284-014-1176-8
Tökölyi J., Bradács F., Hóka N., Kozma N., Miklós M., Mucza O., Lénárt K., Ösz Z., Sebestyén F. & Barta Z. 2015. Effects of food availability on asexual reproduction and stress tolerance along the fast-slow life history continuum in freshwater hydra (Cnidaria: Hydrozoa). Hydrobiologia. DOI: https://doi.org/10.1007/s10750015-2449-0
Van Tienderen P.H. 1997. Generalists, specialists, and the evolution of phenotypic plasticity in sympatric populations of distinct species. Evolution 51 (5): 1372–1380. DOI: https://doi.org/10.2307/2411189
Via S. & Lande R. 1985. Genotype-environment interaction and the evolution of phenotypic plasticity. Evolution 39 (3): 505–522. DOI: https://doi.org/10.2307/2408649
West-Eberhard M.J. 2003. Developmental Plasticity and Evolution. Oxford University Press, New York, 816 pp. ISBN: 9780195122350
Wingfield J.C., Hahn T.P., Levin R. & Honey P. 1992. Environmental predictability and control of gonadal cycles in birds. J. Exp. Zool. 261 (2): 214–231. DOI: https://doi.org/10.1002/jez.1402610212
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Rosa, M.E., Bradács, F. & Tökölyi, J. Response of green hydra (Hydra viridissima) to variability and directional changes in food availability. Biologia 70, 1366–1375 (2015). https://doi.org/10.1515/biolog-2015-0161
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DOI: https://doi.org/10.1515/biolog-2015-0161