AKIMOTO, Shin-ichi

Professor

Department of Ecology and Systematics,
Graduate School of Agriculture,
Hokkaido University,
Sapporo, 060-8589, Japan

e-mail: akimoto@res.agr.hokudai.ac.jp

Research interests

･ Genetic differentiation and speciation in gall-froming aphids (photos)
･ Phylobiogeography of gall-froming aphids
･ Effects of inbreeding on the morphology of aphids (photo)
･ Speciation of wingless grasshoppers, Podisma sapporensis (photo)

・Natural selection acting on the galling process of Tetraneura aphids
・Inbreeding depression in the aphid Prociphilus oriens
・Mating system in Prociphilus oriens
・Sexual dimorphism and sex ratio in gall-forming aphids
・Molecular phylogeny in gall-forming aphids
・Population structure in sexual and asexual populations of aphids
・Sexual conflicts in the grasshopper Podisma sapporensis

Publications

1) S. Aoki, S. Akimoto and Sk.Yamane (1981). Observations on Pseudoregma alexanderi (Homoptera, Pemphigidae), an aphid species producing pseudoscorpion-like soldiers on bamboos. Kontyu, 49: 355-366.

2) S. Akimoto (1981). Gall formation by Eriosoma fundatrices and gall parasitism in Eriosoma yangi (Homoptera, Pemphigidae). Kontyu, 49: 426-436.

3) S. Akimoto (1983). A revision of the genus Eriosoma and its allied genera in Japan (Homoptera: Aphidoidea). Insecta Matsumurana, new series, 27: 37-106.

4) S. Akimoto (1985). Taxonomic study on gall aphids, Colopha, Paracolopha and Kaltenbachiella (Aphidoidea: Pemphigidae) in East Asia, with special reference to their origins and distributional patterns. Insecta Matsumurana, new series, 30: 1-79.

5) S. Akimoto (1985). Occurrence of abnormal phenotypes in a host-alternating aphid and their implications for genome organization and evolution. Evolutionary Theory, Chicago University, 7: 179-193.

6) S. Akimoto (1988). Competition and niche relationships among Eriosoma aphids occurring on the Japanese elm. Oecologia, 75: 44-53.

7) S. Akimoto. (1988). Is the origin of non-migratory aphids compatible with the Neo-Darwinian theory?: A comment on Aoki and Kurosu. Journal of Ethology, 6: 63-64.

8) S. Akimoto (1988). The evolution of gall parasitism accompanied by a host shift in the gall aphid, Eriosoma yangi (Homoptera, Aphidoidea). Biological Journal of the Linnean Society, 35: 297-312.

9) S. Akimoto (1989). Gall-invading behavior of Eriosoma aphids (Homoptera, Pemphigidae) and its significance. Japanese Journal of Entomology, 57: 210-220.

10) S. Akimoto (1990). Local adaptation and host race formation of a gall-forming aphid in relation to environmental heterogeneity. Oecologia, 83: 162-170.

11) S. Akimoto (1992). Shift in life-history strategy from reproduction to defense with colony age in the galling aphid Hemipodaphis persimilis producing defensive first-instar larvae. Researches on Population Ecology, 34: 359-372.

12) 秋元信一、櫻井洋一、立田晴記 (1993). 短翅性サッポロフキバッタ Podisma sapporensisの形状およびアロメトリー関係にみられる地理的変異. Japanese Journal of Entomology, 61: 625-640.

13) S. Akimoto and Y. Yamaguchi (1994). Phenotypic selection on the process of gall formation of a Tetraneura aphid (Pemphigidae). Journal of Animal Ecology, 63: 727-738.

14) 立田晴記、秋元信一 (1994). サッポロフキバッタ Podisma sapporensisの形態変異に関する分析. Japanese Journal of Entomology, 62: 225-234.

15) H. Tatsuta, N. Yasuda and S. Akimoto (1994). Geographic variation in morphological characters of the alpine apterous grasshopper, Zubovskia koeppeni parvula (Orthoptera, Podisminae). Japanese Journal of Entomology, 62: 507-512.

16) T. Komatsu and S. Akimoto (1995). Genetic differentiation as a result of adaptation to the phenologies of individual host trees in the galling aphid Kaltenbachiella japonica. Ecological Entomology, 20: 33-42.

17) S. Akimoto (1995). Coexistence and weak amensalism of congeneric gall-forming aphids on the Japanese elm. Researches on Population Ecology, 37: 81-89.

18) S. Akimoto (1996). Ecological factors promoting the evolution of colony defense in aphids: computer simulations. Insectes Sociaux, 43: 1-15.

19) S. Akimoto (1996). Soldier aphids found in the closed gall of Paracolopha morrisoni (Aphidoidea: Pemphigidae). Japanese Journal of Entomology, 64(2): 379-384.

20) S. Akimoto, K. Ozaki, and Y. Matsumoto (1996). Production of first-instar defenders by the Hormaphidid gall-forming aphid Hamamelistes cristafoliae living anholocyclically on Betula maximowicziana. Japanese Journal of Entomology, 64(4): 879-888.

21) S. Akimoto and Y. Yamaguchi (1997). Gall usurpation by the gall-forming aphid, Tetraneura sorini (Insecta Homoptera). Ethology, Ecology and Evolution, 9(2): 159-168.

22) H. Tatsuta and S. Akimoto (1997). Temporal morphological variation of the brachypterus grasshopper, Podisma sapporoensis (Orthoptera: Podisminae). Applied Entomology and Zoology, 32(3): 527-529.

23) Y. Sakamaki and S. Akimoto (1997). Wing shape of gelechiid moths and its functions: analysis by elliptic Fourier transformation. Annals of the Entomological Society of America, 90(4): 447-452.

24) S. Akimoto (1998). Soldie-like nymphs in the pemphigid aphid Colophina clematicola (Pemphigidae: Aphidoidea). Entomological Science, 1(1): 33-36.

25) S. Akimoto (1998). Heterogeneous selective pressures on egg-hatching time and the maintenance of its genetic variance in a Tetraneura gall-forming aphid. Ecological Entomology, 23: 229-237.

26) H. Tatsuta and S. Akimoto (1998). Sexual differences in the pattern of spatial variation in the brachypterous grasshopper, Podisma sapporensis (Orthoptera: Podisminae). Canadian Journal of Zoology, 76: 1450-1455.

27) A. Kanazawa, A. Tozuka, S. Akimoto, J. Abe and Y. Shimamoto (1998). Phylogenetic relationships of the mitochondrial genomes in the genus, Glycine subgenus Soja. Genes and Genetic Systems, 73(4): 255-261.

28) S. Akimoto (1999). Host preference and galling success in closely related aphids, Tetraneura yezoensis and T. radicicola (Pemphigidae: Aphidoidea), associated with the Japanese elm. Applied Entomology and Zoology, 34(1): 31-38.

29) H. Tatsuta and S. Akimoto (2000). Variability in phenotypic covariance structure of female genitalia in the brachypterous grasshopper, Podisma sapporensis (Orthoptera: Podisminae). Annals of the Entomological Society of America, 93(1): 127-132.

30) H. Tatsuta, G. Ito, A.G. Bugrov, A. Tchernykh and S. Akimoto (2000). Multivariate morphometrics of two Podisma species in Kunashiri Island. Applied Entomology and Zoology, 35(1): 1-8.

31) I. Yao, H. Shibao and S. Akimoto (2000). Costs and benefits of ant attendance to the drepanosiphid aphid, Tuberculatus quercicola. Oikos, 89: 3-10.

32) A. G. Bugrov, E. Warchalowska-Sliwa, H. Tatsuta, E. A. Perepelov and S. Akimoto (2000). Distribution pattern of the XO/XX and neo-XY/neo-XX chromosomal races of the brachypterous grasshopper Podisma sapporensis (Orthoptera: Acrididae) in Hokkaido. Entomological Science, 3(4) : 693-699.

33) A. G. Bugrov, E. Warchalowska-Sliwa, G. Ito, and S. Akimoto (2000). C-banded karyotypes of some Podisminae grasshoppers (Orthoptera, Acrididae) from Japan. Cytologia, 65: 351-358.

34) H. Tatsuta and K. Mizota and S. Akimoto (2001). Allometric patterns of heads and genitalia in the stag beetle Lucanus maculifemoratus (Coleoptera: Lucanidae). Annals of the Entomological Society of America, 94 (3): 462-466.

35) I. Yao and S. Akimoto (2001). Ant attendance changes the sugar composition of the honeydew of the drepanosiphid aphid Tuberculatus quercicola. Oecologia, 128: 36-43.

36) E. Warchalowska-Sliwa, A. G. Bugrov, H. Tatsuta and S. Akimoto (2001). B chromosomes, translocation between B and autosomes, and C-heterochromatin polymorphism of the grasshopper Podisma sapporensis Shir. (Orthoptera, Acrididae) in Hokkaido, Northern Japan. Folia biologica (Krakow), 49: 63-75.

37) H. Tatsuta, K. Miura and S. Akimoto (2001). Morphological differentiation among neighboring populations in the brachypterous grasshopper Parapodisma subastris (Orthoptera: Acrididae). Entomological Science, 4: 315-320.

38) A. G. Bugrov, E. Warchalowska-Sliwa, H. Tatsuta and S. Akimoto (2001). Chromosome polymorphism and C-banding variation of the brachypterous grasshopper Podisma sapporensis Shir. (Orthoptera, Acrididae) in Hokkaido, northern Japan. Folia Biologica (Kracow), 49 (3-4): 137-152.

39) S. Akimoto and Y. Narita (2002). Alternating temperatures enhance the hatchability of overwintered eggs of the gall-forming aphid Paracolopha morrisoni (Aphidoidea: Eriosomatinae). Entomological Science, 5: 11-18.

40) I. Yao and S. Akimoto (2002). Flexibility in the composition and concentration of amino acids in honeydew of the drepanosiphid aphid Tuberculatus quercicola. Ecological Entomology, 27: 745-752.

41) H. Yorozuya and S. Akimoto (2002). Nectar secretion from damaged shoots in Quercus mongolica and exploitation of the response by ants; herbivory by ants. Entomological Science, 5: 275-280.

42) J. Takahashi, S. Akimoto, E. Hasegawa and J. Nakamura (2002). Queen mating frequencies and genetic relatedness between workers in the hornets Vespa ducalis (Hymenoptera: Vespidae). Applied Entomology and Zoology, 37: 481-486.

43) J. Takahashi, J. Nakamura, M. Sasaki, S. Tingek and S. Akimoto (2002). New haplotypes for non-coding region of mitochondrial DNA in cavity-nesting honey bees, Apis koschevnikovi and A. nuluensis. Apidologie, 33: 25-31.

44) S. Ohno, S. Hoshizaki, Y. Ishikawa, S. Tatsuki and S. Akimoto (2003). Allometry of male genitalia in a lepidopteran species, Ostrinia tatipennis (Lepidoptera: Crambidae). Applied Entomology and Zoology, 38: 313-319.

45) J. Takahashi, S. Akimoto, J. Nakamura and E. Hasegawa (2003). Mating frequency and genetic relatedness of workers in the hornet Vespa analis (Hymenoptera: Vespidae). Entomological Science, 6: 119-123.

46) J. Takahashi, J. Nakamura, S. Akimoto and E. Hasegawa (2003). Kin structure and colony male reproduction in the hornet Vespa crabro (Hymenoptera:Vespidae). Journal of Ethology, 22: 43-47.

47) I. Yao, S. Akimoto and E. Hasegawa (2003). Isolation of microsatellite markers from the drepanosiphid aphid Tuberculatus quercicola (Homoptera, Aphididae). Molecular Ecology Notes, 3: 542-543.

48) H. Tatsuta, K. Mizota, and S. Akimoto (2004). Relationship between size and shape in the sexually dimorphic beetle Prosopocoilus inclinatus (Coleoptera: Lucanidae). Biological Journal of the Linnean Society, 81: 219ﾐ233.

49) J. Takahashi, S. Akimoto, S. J. Martin, M, Tamukae and E. Hasegawa (2004). Mating structure and male production in the giant hornet Vespa mandarinia (Hymenoptera: Vespidae). Applied Entomology and Zoology, 39: 343-349.

50) R. Tomisawa and S. Akimoto (2004). Host range and host preference of a flea weevil, Orchestes hustachei, parasitizing aphid galls. Entomologocal Science, 7: 21-30.

51) T. Kurokawa, I. Yao, S. Akimoto and E. Hasagawa (2004). Isolation of six microsatellite markers from the pea aphid, Acyrthosiphon pisum (Homoptera, Aphididae). Molecular Ecology Notes, 4: 523-524.

52) Y. Koyama, I. Yao and S. Akimoto (2004). Aphid galls accumulate high concentration of amino acids: a support for the nutrition hypothesis for gall formation. Entomologia Experimentalis et Applicata, 13: 35-44.

53) A. G. Bugrov, E. Warchalowska-Sliwa, Y. Sugano and S. Akimoto (2004). Experimental hybridization between X0 and XY chromosome races in grasshopper Podisma sapporensis Shir. (Orthoptera, Acrididae). Folia Biologica (Krakow), 52: 39-45.

54) A. G. Bugrov, E. Warchalowska-Sliwa and S. Akimoto (2005). Taxonomic status of the grasshopper Podisma tyatiensis; reproductive isolation between P. tyatiensis and P. sapporensis. Entomological Science, 8: 85-90.

55) M. Sano and S. Akimoto (2005). Distribution of sexual and asexual species in the aphid genus Colopha Monell (Aphididae: Eriosomatinae), with the description of a new species. Journal of Natural History, 39 (4): 337-349.

56) K. Futami and S. Akimoto (2005). Facultative second oviposition as an adaptation to egg loss in a semelparous crab spider. Ethology, 111: 1126-1138.

57) S. Akimoto (2006). Inbreeding depression, increased phenotypic variance and a trade-off between gonads and appendages in selfed progeny of the aphid Prociphilus oriens. Evolution, 60(1): 77-86.

58) H. Tatsuta, S. Hoshizaki, A. G. Bugrov, E. Warchalowska-Sliwa, S. Tatsuki and S. Akimoto (2006). Origin of chromosomal rearrangement: phylogenetic relationship between X0/XX and XY/XX chromosomal races in the brachypterous grasshopper Podisma sapporensis (Orthoptera: Acrididae). Annals of the Entomological Society of America, 99: 457-462.

59) I. Yao, H. Tatsuta and S. Akimoto (2006). Isolation of six microsatellite markers from apterous grasshopper Podisma kanoi (Orthoptera: Podisminae). Molecular Ecology Notes, 6 (4), 1067ﾐ1069.

60) Y. C. Sugano and S. Akimoto (2007). Asymmetric mating in the brachypterous grasshopper Podisma sapporensis. Ethology, 113: 301-311.

61) H. Tatsuta, K. Fujimoto, K. Mizota, K. Reinhardt and S. Akimoto (in press). Distinctive developmental variability of genital parts in the sexually dimorphic beetle, Prosopocoilus inclinatus (Coleoptera: Lucanidae). Biological Journal of the Linnean Society.

62) Y. Fukunaga and S. Akimoto (in press).
Toxicity of the aphid Aulacorthum magnoliae to the predator Harmonia axyridis (Coleoptera: Coccinellidae) and genetic variance in the assimilation of the toxic aphids in H. axyridis larvae. Entomological Science.

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