[en] Evolutionary theory predicts that alternative trophic morphologies are adaptive because they allow a broad use of resources in heterogeneous environments. The development of a cannibal morphology is expected to result in cannibalism and high individual fitness, but conflicting results show that the situation is more complex. The goal of the present study was to increase our understanding of the ultimate benefits of a cannibalistic polyphenism by determining temporal changes in the feeding habits and biomass intake in a population of tiger salamanders (Ambystoma tigrinum nebulosum). Cannibals in this species develop a larger head than typicals and have prominent teeth, both useful for consuming large prey. Although cannibalism was only detected in cannibal morphs, large temporal variation in resource partitioning was found between morphs. The two morphs always differed in their foraging habits, but cannibalism mainly occurred immediately after the ontogenetic divergence between morphs. Cannibals shifted their foraging later to a more planktivorous diet (i.e. the primarily prey of the typical morph). Cannibals also obtained more prey biomass than typicals. These results indicate that the cannibalistic morph is advantageous over the typical development, but that these advantages vary ontogenetically. Although the results obtained are consistent with models predicting the maintenance of cannibalism polyphenism in natural populations, they show that the foraging tactics utilized by cannibal morphs, and the fitness consequences accrued by such tactics, are likely to be more complex and dynamic than previous studies have suggested. (c) 2006 The Linnean Society of London.
Denoël, Mathieu ; Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Biologie du comportement - Ethologie et psychologie animale
Whiteman, Howard H.; Murray State University, Kentucky - MSU
Wissinger, Scott A.; Alhegeny College, Meadville
Language :
English
Title :
Temporal shift of diet in alternative cannibalistic morphs of the tiger salamander
Publication date :
2006
Journal title :
Biological Journal of the Linnean Society
ISSN :
0024-4066
eISSN :
1095-8312
Publisher :
Blackwell Publishing, Oxford, United Kingdom
Volume :
89
Issue :
2
Pages :
373-382
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE] NSF - National Science Foundation [US-VA]
Bush GL. 1994. Sympatric speciation in animals: new wine in old bottles. Trends in Ecology and Evolution 9: 285-288.
Collins JP, Holomuzki JR. 1984. Intraspecific variation in diet within and between trophic morphs in larval tiger salamanders (Ambystoma tigrinum nebulosum). Canadian Journal of Zoology 62: 168-174.
Collins JP, Zerba KE, Sredl MJ. 1993. Shaping intraspecific variation: development, ecology and the evolution of morphology and life history variation in tiger salamanders. Genetica 89: 167-183.
Crump ML. 1992. Cannibalism in amphibians. In: Elgar MA, Crespi BJ, eds. Cannibalism - ecology and evolution among diverse taxa. Oxford: Oxford University Press, 256-276.
Denoël M, Andreone F. 2003. Trophic habits and aquatic microhabitat use in gilled immature, paedomorphic and metamorphic Alpine newts (Triturus alpestris apuanus) in a pond in central Italy. Belgian Journal of Zoology 133: 95-102.
Denoël M, Hervant F, Schabetsberger R, Joly P. 2002. Short- and long term advantages of an alternative ontogenetic pathway. Biological Journal of the Linnean Society 77: 105-112.
Denoël M, Joly P. 2001. Size-related predation reduces intramorph competition in paedomorphic Alpine newts. Canadian Journal of Zoology 79: 943-948.
Denoël M, Poncin P, Ruwet JC. 2001. Sexual compatibility between two heterochronic morphs in the Alpine newt, Triturus alpestris. Animal Behaviour 62: 559-566.
Elgar MA, Crespi BJ. 1992. Ecology and evolution of cannibalism. In: Elgar MA, Crespi BJ, eds. Cannibalism - ecology and evolution among diverse taxa. Oxford: Oxford University Press, 1-12.
Hoffman EA, Pfennig DW. 1999. Proximate causes of cannibalistic polyphenism in larval tiger salamanders. Ecology 80: 1076-1080.
Hutchinson GE. 1959. Homage to Santa-Rosalia or why are there so many kinds of animals? American Naturalist 93: 145-159.
Joly P. 1987. Le régime alimentaire des amphibiens: méthodes d'étude. Alytes 6: 11-17.
Joly P, Giacoma C. 1992. Limitation of similarity and feeding habits in three syntopic species of newts (Triturus, Amphibia). Ecography 15: 401-411.
Lannoo MJ, Bachmann MD. 1984. Aspects of cannibalistic morphs in a population of Ambystoma t. tigrinum larvae. American Midland Naturalist 112: 103-109.
Lannoo MJ, Lowcock L, Bogart JP. 1989. Sibling cannibalism in noncannibal morph Ambystoma tigrinum larvae and its correlation with high growth rates and early metamorphosis. Canadian Journal of Zoology 67: 1911-1914.
Leff LG, Bachmann MD. 1986. Ontogenetic changes in predatory behavior of larval tiger salamanders (Ambystoma tigrnium). Canadian Journal of Zoology 64: 1337-1344.
Loeb MLG, Collins JP, Maret TJ. 1994. The role of prey in controlling expression of a trophic polymorphism in Ambystoma tigrinum nebulosum. Functional Ecology 8: 151-158.
Manica A. 2004. Parental fish change their cannibalistic behaviour in response to the cost-to-benefit ratio of parental care. Animal Behaviour 67: 1015-1021.
Maret TJ, Collins JP. 1994. Individual responses to population size structure: the role of size variation in controlling expression of a trophic polyphenism. Oecologia 100: 279-285.
Maret TJ, Collins JP. 1997. Ecological origin of morphological diversity: a study of alternative trophic phenotypes in larval salamanders. Evolution 51: 898-905.
Michimae H, Wakahara M. 2001. Factors which affect the occurrence of cannibalism and the broad-headed 'cannibal' morph in larvae of the salamander Hynobius retardatus. Behavioral Ecology and Sociobiology 50: 339-345.
Nishihara A. 1996. Effects of density on growth of head size in larvae of the salamander Hynobius retardatus. Copeia 1996: 478-483.
Pedersen SC. 1991. Dental morphology of the cannibal morph in the tiger salamander, Ambystoma tigrinum. Amphibia-Reptilia 12: 1-14.
Pfennig DW, Hoffman EA. 1998. Pathogen transmission as a selective force against cannibalism. Animal Behaviour 55: 1255-1261.
Pfennig DW, Loeb MLG, Collins JP. 1991. Pathogens as a factor limiting the spread of cannibalism in tiger salamanders. Oecologia 88: 161-166.
Pfennig DW, Sherman PW, Collins JP. 1994. Kin recognition and cannibalism in polyphenic salamanders. Behavioural Ecology 5: 225-232.
Polis GA. 1981. The evolution and dynamics of intraspecific predation. Annual Review of Ecology and Systematics 12: 225-251.
Roff DA, Fairbairn DJ. 1991. Wing dimorphism and the evolution of migratory polymorphisms among the insecta. American Zoologist 31: 243-251.
Schlichting CD, Pigliucci M. 1998. Phenotypic evolution. A reaction norm perspective. Sunderland, MA: Sinauer.
Schoener TW. 1970. Nonsynchronous spatial overlap of lizards in patchy habitats. Ecology 51: 408-418.
Semlitsch RD. 1985. Reproductive strategy of a facultatively paedomorphic salamander Ambystoma talpoideum. Oecologia, Berlin 65: 305-313.
Sheen JP, Whiteman HH. 1998. Head and body size relationships in polymorphic tiger salamander larvae from Colorado. Copeia 1998: 1089-1093.
Skulason S, Smith TB. 1995. Resource polymorphisms in vertebrates. Trends in Ecology and Evolution 10: 366-370.
Sokal RR, Rohlf FJ. 1995. Biometry. New York, NY: Freeman and Co.
Statsoft-France. 2000. Statistica pour Windows (computer program manual). Maisons-Alfort: Statsoft.
Tokeshi M. 1999. Species coexistence. Ecological and evolutionary perspectives. Oxford: Blackwell Science.
Via S. 2001. Sympatric speciation in animals: the uggly duckling grows up. Trends in Ecology and Evolution 16: 381-390.
Wakahara M. 1995. Cannibalism and the resulting dimorphism in larvae of a salamander Hynobius retardatus, inhabited in Hokkaido, Japan. Zoological Science 12: 467-473.
Wakano JY. 2004. Drastic growth effect may explain sympatric cannibalistic polymorphism. Journal of Theoretical Biology 226: 69-77.
West-Eberhard MJ. 2003. Developmental plasticity and evolution. Oxford: Oxford University Press.
Whiteman HH, Sheen JP, Johnson EB, VanDeusen A, Cargille R, Sacco TW. 2003. Heterospecific prey and trophic polyphenism in larval tiger salamanders. Copeia 2003: 56-67.
Wissinger SA, Steinmetez J, Alexander JS, Brown WS. 2004. Larval cannibalism, time constraints, and adult fitness in caddisflies that inhabit temporary wetlands. Oecologia 138: 39-47.