Variation in Cannibalistic Polyphenism between Populations in the Salamander Hynobius retardatus(Ecology)
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概要
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Organisms sometimes change their phenotype to maximize fitness according to local environments. If the frequency of the broad-headed "cannibal" morph in the larvae of the salamander Hynobius retardatus has been evolutionary maintained at a certain level within a population as a result of local adaptation, variations in its frequency should be found among different populations with environmental variation. We investigated whether variations in the frequency of the broad-headed morph were present in 2 different populations, Nopporo (a low-density population) and Erimo (a high-density population), by raising larvae from the respective populations under the same experimental conditions. The occurrence rate of the broad-headed "cannibal" morph was significantly different between the 2 populations when examined with different experimental larval densities. These results suggest that the reaction norm with respect to the frequency of the broad-headed morph is different between the Nopporo and Erimo populations. Because the local populations are assumed to be selected for under different environments, the different reaction norm might have evolved in response to different selection pressures.
- 社団法人日本動物学会の論文
- 2002-06-25
著者
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Michimae Hirofumi
Division of Biological Sciences, Graduate School of Science, Hokkaido University
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Wakahara Masami
Division Of Biological Sciences Graduate School Of Science Hokkaido University
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Michimae Hirofumi
Division Of Biological Sciences Graduate School Of Science Hokkaido University
関連論文
- DIFFERENTIATED REACTION NORMS UNDER DIFFERENT SELECTIONS IN POLYMORPHISM: BROAD-HEADED MORPH IN HYNOBIUS RETARDATUS(Behavior Biology and Ecology)(Proceedings of the Seventy-Third Annual Meeting of the Zoological Society of Japan)
- Erythropoiesis and Conversion of RBCs and Hemoglobins from Larval to Adult Type during Amphibian Development
- TEMPERATURE-DEPENDENT SEX DIFFERENTIATION IN HYNOBIUS RETARDATUS : EXPRESSION PATTERN OF P450-AROMATASE(Endocrinology,Abstracts of papers presented at the 75^ Annual Meeting of the Zoological Society of Japan)
- PHYLOGEOGRAPHY OF THE SALAMANDER HYNOBIUS RETARDATUS BASED ON PARTIAL mtDNA SEQUENCE(Behavior Biology and Ecology,Abstracts of papers presented at the 76^ Annual Meeting of the Zoological Society of Japan)
- Several Biochemical Alterations from Larval to Adult Types are Independent on Morphological Metamorphosis in a Salamander, Hynobius retardatus
- DEVELOPMENT OF PRIMORDIAL GERM CELLS (PGCS) IN THE JAPANESE NEWT CYNOPS PYRRHOGASTER(Developmental Biology,Abstracts of papers presented at the 74^ Annual Meeting of the Zoological Society of Japan)
- EXPRESSION ANALYSIS OF A GENE EXPRESSED IN THE GERM LINE IN URODELE EMBRYOS(Developmental Biology,Abstracts of papers presented at the 75^ Annual Meeting of the Zoological Society of Japan)
- Adaptable Larval Life Histories in Different Populations of the Salamander, Hynobius retardatus, Living in Various Habitats(Animal Diversity and Evolution)
- Variation in Cannibalistic Polyphenism between Populations in the Salamander Hynobius retardatus(Ecology)
- Heterochronic Expression of Several Adult Phenotypes in Normally Metamorphosing and Metamorphosis-Arrested Larvae of a Salamander Hynobius retardatus
- Heterochrony and Neotenic Salamanders : Possible Clues for Understanding the Animal Development and Evolution
- HETEROCHRONIC EXPRESSION OF SEVERAL ADULT PHENOTYPES DURING METAMORPHOSIS OF A SALAMANDER HYNOBLUS RETARDATUS