Dr. Cesar G.  Demayo

Dr. Cesar G. Demayo

Professor
Mindanao State University, Philippines


Highest Degree
Ph.D. in Genetics from University of the Philippines Los Banos, Philippines

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Biography

Dr. Cesar G. Demayo completed his PhD (Entomology), PhD (Genetics), M.S (Genetics) from UPLB, Philippines in 1990 & 1996 & 1986 respectively. Dr. Cesar G. Demayo is member of following societies, President and Vice President and Board Member of Philippine Society for the Study of Nature Inc, President and Vice President of Philippine Society for the Advancement of Genetics, Senior Member of International Association of Computer Science and Information Technology (IACSIT) and also in Asia-Pacific Chemical, Biological, Environmental Engineering Society (APCBEES), Board Member of Philippine Association of Entomologists Inc, Member of Weed Science Society of the Philippines. His awards and honors includes, 2010 Professional Chair Holder, Best Poster Awards, Achievement Awards, Best Paper Award, Outstanding Young Scientist in Genetics and Entomology from National Academy of Science and Technology, full Scholarship at University level. He published 381 articles in national and international peer-reviewed journals.

Area of Interest:

Biomedical Sciences
100%
Entomology
62%
Genetics
90%
Biological Sciences
75%
Molecular Bacteriology
55%

Education

1996

Ph.D.

University of the Philippines Los Banos, Philippines

Genetics

Selected Publications

  1. Torres, M.A.J., R. Joshi, L. Sebastian and C.G. Demayo, 2011. Geographic phenetic variation in the golden apple snail, Pomacea canaliculata (Ampullariidae) based on geometric approaches to morphometrics. Adv. Environ. Sci., .

  2. Torres, M.A.J., L.R.T. Amarillo, R. Joshi, L. Sebastian and Z. aoananet al., 2011. 2011. Intra- and Inter-Population Variability in the Golden Apple Snail Pomacea canaliculata. Aust. J. Basic Applied Sci., 5: 789-800.

  3. Teresa, B.A., M.A.J. Torres and C.G. Demayo, 2011. Heritability and frequency occurrence of aging male symptoms in pagadian city and iligan city, Philippines. Proceedings of the First International Conference on Interdisciplinary Research and Development, , May 31, June 1, 2011, Thailand. Special Issue of the International Journal of the Computer, the Internet and Management, 1-76.

  4. Tabugo, S.R.M., M.A.J. Torres and C.G. Demayo, 2011. Determination of Developmental modules and Conservatism in the Fore- and hind wing of two species of dragonflies, Orthetrum sabina and Neurothemis ramburii. Int. J. Agric. Biol., 13: 541-546.
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  5. Moneva, C.S.O., M.A.J. Torres and C.G. Demayo, 2011. Variability in the wing and tail feathers of the rock pigeon (Columba livia). Proc. Int. Conf. Env. Sci. Technol., 2: 327-332.

  6. Gutierrez, P.M. and C.G. Demayo, 2011. Gutierrez, P.M. and C.G. Demayo, 2011. Thin-Plate Spline (TPS) and correlation based on distances coriandis) analyses as tools for the analysis of morphological differences in dragonfly wings. Proc. Int. Conf. Env. Sci. Technol., 2: 375-379.

  7. Galolo, A.R.V., M.A.J. Torres and C.G. Demayo, 2011. Paramere morphology of two colormorphs of the brown planthopper Nilaparvata lugens (Stal) (Homoptera: Delphacidae). Proc. Int. Conf. Env. Sci. Technol., 2: 370-374.

  8. Demayo, C.G., S.A. Harun and M.A.J. Torres, 2011. Procrustes analysis of wing shape divergence among sibling species of neurothemis dragonflies. Aust. J. Basic Applied Sci., 5: 748-759.

  9. Demayo, C.G., R.B. Rampola and M.A.J. Torres, 2011. Describing developmental modules in the Fore-and hind wings of the nymphalid butterfly, Ypthima lisandra cramer using modularity and integration software. Aust. J. Basic Applied Sci., 5: 733-738.

  10. Demayo, C.G., P.Q. Palomares and M.A.J. Torres, 2011. Describing shapes of mandible in selected populations of the rice striped stem borers (Chilo suppressalis, walker, 1863) associated with different rice types. Aust. J. Basic Applied Sci., 5: 739-747.

  11. Demayo, C.G., J. Macabanding and M.A.J. Torres, 2011. Heritability of aggressive behavior in selected cultural groups in mindanao, philippines. Aust. J. Basic Applied Scie., 5: 429-437.

  12. Demayo, C.G., B.A. Teresa and M.A.J. Torres, 2011.. Heritability of Aging Male Symptoms (AMS) in filipino males. Aust. J. Basic Applied Sci., 5: 429-437.

  13. Dalayap, R., M.A.J. Torres and C.G. Demayo, 2011.. Landmark and outline methods in describing petal, sepal and labellum shapes of the flower of Mokara orchid varieties. Int. J. Agric. Biol., 13: 652-658.

  14. Cruz, L.M.L.D., M.A.J. Torres, A.T. Barrion, R. Joshi and L.S. Sebastianet al., 2011. Geometric morphometric analysis of the head, pronotum and genitalia of the rice black bug associated with selected rice types. Egypt. Academic J. Biol. Sci. A. Entomol., 4: 21-31.

  15. Calacat, J.C.B., M.A.J. Torres and C.G. Demayo, 2011. Application of elliptic fourier analysis in understanding leaf shape characters of Anthurium. Adv. Agric. Botanics Int. J. Bioflux Soc. AAB Bioflux, 3: 82-92.

  16. Apuan, D.A., M.A.G. Torres, J. Gorospe, R. Amparado and C.G. Demayo, 2011. Intra-panicle variation in seed shapes of weedy rice. Aust. J. Basic Applied Sci., 5: 185-191.

  17. Alegre, A.L.I., M.A.J. Torres and C.G. Demayo, 2011. Determination of Host-associated variability in the shape of the mandible of white rice stem borer Scirpophaga innotata Walker (Lepidoptera: Pyralidae). Adv. Environ. Sci. Int. J. Bioflux Soc. AES Bioflux, 3: 53-67.

  18. Albutra, Q.B., M.A.J. Torres and C.G. Demayo, 2011. Determination of sexual dimorphism in the primary wing and tail feathers ofa subspecies of the rock pigeon (Columba livia intermedia) using principal component analysis, elliptic fourier analysis and discriminat analysis. Proc. Int. Conf. on Env. Sci. Technol., 2: 322-326.

  19. Adamat, L., M.A.J. Torres, J. Gorospe, and C.G. Demayo, 2011. Orb-web design of garden spider, argiope appensa (Walckenaer, 1841) (Araneae:Araneidae). Aust. J. Basic Applied Sci., 5: 171-175.

  20. Adajar, A.Q., M.A.J. Torres and C.G. Demayo, 2011. Sexual dimorphism in the shape of the primary flight feathers of parakeet-budgerigar,Melopsittacus undulatus shaw (1805). Proc. Int. Conf. Env. Sci. Technol., 2: 33-37.

  21. Torres, M.A.J., R. Eupena and C.G. Demayo, 2010. Sexual dimorphism and morphological diversity in the shapes and sizes of the cranium, scapula, mandible and pelvis of selected murid rodents. Aust. J. Basic Applied Sci., 4: 4323-4335.

  22. Torres, M.A.J., L.A. Adamat, M.M.E. Manting, S.R.M. Tabugo and R.C. Joshi et al., 2010. Developmental modules defining the shape of the forewing of Scotinophara coarctata. Egypt. Acad. J. Biol. Sci., 3: 105-112.

  23. Torres, M.A.J., J. Lumansoc and C.G. Demayo, 2010. Variability in head shapes in three populations of the rice bug leptocorisa oratorius (Fabricius) (Hemiptera: Alydidae). Egypt. Acad. J. Biol. Sci., 3: 173-184.

  24. Torres, M.A.J., A.T. Barrion, R.C. Joshi, L.S. Sebastian, A.A. Barrion, A.A. Barrion-Dupo and C.G. Demayo, 2010. Systematic Relationships of Rice Black Bugs, Scotinophara spp. Inferred using non-metric multidimensional scaling technique and parsimony analysis. Egypt. Acad. J. Biol. Sci., 3: 113-131.

  25. Tabugo, S.R., M.A.J. Torres and C.G. Demayo, 2010. Relative warps and correlation analysis based on distances of the morphological variations in the golden apple snail, pomacea canaliculata from iligan city, Philippines. Proceedings of International Conference on Enviromental Engineering and Applications, October, 7, 2010, IEEE Publications, (Indexed by ISI, Ei Compendex and INSPEC), 81-85.
    CrossRef  |  

  26. Tabugo, S., M.A.J. Torres, J. Gorospe and C.G. Demayo, 2010. Modularity and Integration in the fore- and hindwing of libelludid dragonflies. J. Nature Stud., 9: 201-211.

  27. Rosa, V.G.D., M.A.J. Torres and C.G. Demayo, 2010. Geometric morphometric tools in the analysis of shell shape of twelve local populations of the invasive snail, achatina fulica bowdich from the Philippines. Proceedings of International Conference on Enviromental Engineering and Applications, September, 10-12, 2010, IEEE Publications. (Indexed by ISI, Ei Compendex and INSPEC), 91-95.
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  28. Nacua, S.S., E.L. Dorado, M.A.J. Torres and C.G. Demayo, 2010. Body shape variation between two populations of the White Goby, Glossogobius giuris (Hamilton and Buchanan). Res. J. Fish. Hydrobiol., 5: 44-51.

  29. Matondo, D.A.P., M.A.J. Torres, S.R.M. Tabugo and C.G. Demayo, 2010. Describing variations in scales between sexes of the yellowstriped goatfish, Uppeneus vittatus (Forsskal, 1775) (Perciformes: Mullidae). Egypt. Acad. J. Biol. Sci., 2: 37-50.
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  30. Dorado, E., M.A.J. Torres, J. Gorospe and C.G. Demayo, 2010. Sexual imorphism in body shapes of the Indian climbing perch, anabas testudineus (Bloch, 1792). J. Nature Stud., 9: 213-219.

  31. Dorado, E., M.A.J. Torres, A.A. Barrion, R.F. Amparado, J.J.G. Gorospe and C.G. Demayo, 2010. Sexual dimorphism in body shapes of the three-spotted gourami, Trichogaster trichopterus (Pallas,1770) of lake buluan, mindanao, philippines. Res. J. Fish. Hydrobiol., 5: 111-118.

  32. Demayo, C.G., M.A.J. Torres, P. Olvis and N. Manlegro, 2010. Face shape differences in selected indigenous peoples' groups in mindanao, Philippines. Internet J. Biol. Anthropol., 4: 22-22.
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  33. Demayo, C.G., M.A.J. Torres, A.L. Sinco and M.L. Bonachita-Sanguila, 2010. Geometric morphometric analyses of facial shape in Twins. Internet J. Biol. Anthropol., 4: 13-13.
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  34. Demayo, C.G., M.A.J. Torres and C. Vena, 2010. Face Shapes of Diabetics and Non-diabetics described using geometric morphometrics. Internet J. Endocrinol., 6: 14-14.
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  35. Bendoy, C.P., J.T.M. Anthony, S.R. Tabugo and C.G. Demayo, 2010. Sexual dimorphism in the shape of the primary wing and tail feathers of the sky blue parakeet (budgerigar), Melopsittacus undulatus Shaw, 1805 (Psittaciformes: Psittacidae). Egypt. Acad. J. Biol. Sci. Zool., 2: 51-58.
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  36. Ascano II, C.P., J.T.M. Anthony and C.G. Demayo, 2010. Relative warp analysis of head shape variations in Nephotettix virescens Distant (Homoptera: Cicadelidae) infesting rice types with different genes for resistance. Egypt. Acad. J. Biol. Sci., 3: 199-206.

  37. Apuan, D.A., J.T.M. Anthony and C.G. Demayo, 2010. Describing variations and taxonomic status of earthworms collected from selected areas in Misamis Oriental, Philippines using principal component and parsimony analysis. Egypt. Acad. J. Biol. Sci. Zool., 2: 27-36.
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  38. Anthony, J.T.M. and C.G. Demayo, 2010. Landmark-based geometric morphometric analysis of head shape of Uroplata giradi Pic. Proceedings of International Conference on Enviromental Engineering and Applications, October, 7, 2010, IEEE Publications, (Indexed by ISI, Ei Compendex and INSPEC), 76-80.
    CrossRef  |  

  39. Torres, M.A.J., S.B. Razo, A.A. Barrion and C.G. Demayo, 2009. Geometric morphometrics analysis of intrapopulational variation in the carapace and telson of the Indo-Pacific mole crab, Hippa pacifica Dana 1852 (Anomura: Hippidae) from Linamon, Lanao del Norte, Philippines. Asia Life Sci., 18: 87-97.
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  40. Obediente, E.T.E., M.A.J. Torres and J.G. Gorospe, M.M.E. Manting and C.G. Demayo, 2009. Wing shape variability between sexes of the dragonfly neurothemis terminata terminata fraser 1926 (Odonata: Anisoptera). J. Nat. Stud., 8: 119-125.

  41. Galliguez, E.M., M.A.J. Torres and J.G. Gorospe and M.M.E. Manting and C.G. Demayo, 2009. Modularity and integration in the shape of the shell of Vivipara angularis muller (Architaenioglossa: Viviparidae). J. Nat. Stud., 8: 51-58.

  42. Cagata, L.R., M.A.J. Torres, J.G. Gorospe, M.M.E. Manting and C.G. Demayo, 2009. Variability between and among colormorphs of the Goby Fish, Hypseleotris agilis herre (Perciformes: Eleotridae). J. Nature Stud., 8: 43-49.

  43. Bacalso, J.R.A., M.A.J. Torres, J.G. Gorospe, M.M.E. Manting and C.G. Demayo, 2009. Geometric morphometric analysis of face shape variation among maranao students from Iligan city. J. Nat. Stud., 8: 59-67.

  44. Torres, M.A.J., M.M.E. Manting and C.G. Demayo, 2008. Elliptic Fourier Analysis (EFA) of leaflet outline differences in thirteen species of weed legumes. J. Nat. Stud., 7: 117-138.
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  45. Torres, M.A.J., C.G. Demayo and S.V. Siar, 2008. Elliptic fourier analysis of leaf outline differences between and among sixteen species of hoya. Philippine Agric. Sci., 91: 18-28.
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  46. Torres, M.A.J., C.G. Demayo and S.V. Siar, 2008. Corona shape variations among nine species of hoya. Philippine Agric. Sci., 91: 7-17.
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  47. Silao, G.T., M.A.J. Torres and C.G. Demayo, 2008. Variability in the shapes of the pelvic girdles of selected frugivorous and insectivorous bats. J. Nat. Stud., 7: 139-145.

  48. Sarte T.M.A.J.C.E. and C.G. Demayo, 2008. Developmental Independence of the eyespots in the wings of the butterfly Ypthima lisandra. Asia Life Sci., 17: 91-108.

  49. Jaranilla, L.G.F., M.A.J. Torres, C.G. Demayo and M.E.B. Naredo, 2008. Outline analysis of rice seeds (Oryza spp.) and its potential application in the numerical taxonomy and identification of wild rice varieties. J. Nature Stud., 7: 227-240.
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  50. Dalayap, R.M., M.A.J. Torres, C.G. Demayo, A.A. Barrion and A.T. Barrion, 2008. Patterns of petal and sepal shape variations among nine varieties of dendrobium. J. Nat. Stud., 7: 175-182.

  51. Bonachita, M.L., M.A.J. Torres and C.G. Demayo, 2008. Genetic analysis of behavioral traits in twins. J. Nat. Stud., 7: 83-93.

  52. Ajo, E.R.R., M.A.J. Torres and C.G. Demayo, 2008. Attention deficit hyperactivity disorder among adults in the city of Iligan, Philippines. J. Nat. Stud., 7: 95-100.
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  53. Yu, R.V.T., M.A.J. Torres and C.G. Demayo, 2007. Sexual dimorphism in the size and shape of the wings of the damselfly Pseudagrion pilidorsum. Mindanao Forum, 20: 125-135.

  54. Demayo, C.G., S.G. Jala and M.A.J. Torres, 2007. Geometric morphometric analysis of body shapes of three species of crab spiders. J. Nat. Stud., 6: 1-18.

  55. Demayo, C.G., M.A.J. Torres, A.T. Barrion, R.C. Joshi and L.S. Sebastian, 2007. Geometric Morphometrics in the Rice Blackbug, Scotinophara coarctata Group. In: Rice Black Bugs: Taxonomy, Ecology and Management of Invasive Species, Joshi, R.C., A.T. Barrion and L.S. Sebastian (Eds.). Philippine Rice Research Institute, Philippine, pp: 231-286.

  56. Demayo, C.G., M.A.J. Torres and N. Arumpac, 2007. Discrimination of stock populations of freshwater commercial fishes from Baloi Lake in Lanao del Sur using geometric morphometric approaches of the truss network in fishes. J. Nat. Stud., 6: 19-25.

  57. Dalayap, R.M., M.A.J. Torres, A.A. Barrion, and C.G. Demayo, 2007. Analysis of petal and sepal shape variation in orchids of the genus Vanda (Orchidaceae) by elliptic fourier descriptors and principal component analysis. Mindanao Forum, 20: 177-197.

  58. Demayo, C.G., M.W.T. Yu and M.A.J. Torres, 2003. Web architecture-Morphological relationships among species of spiders in Iligan city. Mindanao Forum, 18: 257-272.

  59. Demayo, C.G., D.V. Quijoy and M.A.J. Torres, 2003. Population structure of the higaunons of rogongon, Iligan city. Mindanao Forum, 18: 273-286.

  60. Tomenio, E. and C.G. Demayo, 1999. Variability in the sponge Phyllospongia foliascene populations from coastal areas in iligan city. Mindanao Forum, 13: 117-140.

  61. Jumawan-Nanual, B. and C.G. Demayo, 1999. Morphometric variability in selected populations of Strombus urceus Linne. Mindanao Forum, 13: 105-116.

  62. Gorospe, J. and C.G. Demayo, 1999. Variability in wild and farmed golden rabbitfish Siganus guttatus bloch (Perciformes: siganidae) in northern mindanao. Mindanao Forum, 13: 71-92.

  63. Demayo, C.G., J.W. Dalugdug and A.A. Barrion, 1999. Effects of turmeric oil, sweetflag oil and margosan-o on the corn weevil Sitophilus zeamais Motsch. Mindanao Forum, 13: 185-202.

  64. Demayo, C.G., E.P. Magallona and A.A. Barrion, 1999. Effects of oil extracts of neem Azadirachta indica A. juss, sweetflag Acorus calamus L. on the rice weevil Sitophilus oryzae. Mindanao Forum, 13: 175-184.

  65. Demayo, C.G., R. Hilario and A.A. Barrion, 1997. Effects of neem-based formulations on the brown planthopper Nilaparvata lugens (Stahl) and white backed planthopper Sogatella furcifera (Horvath). Mindanao Forum, 12: 201-207.

  66. Demayo, C.G., L.S. Basas and A.T. Angeles, 1997. Biology of the goldfringed stem borer Chilo auricilius and evaluation of its response to selected biocides. Mindanao Forum, 12: 189-200.
    Direct Link  |  

  67. Demayo, C.G., A.T. Angeles and C.R. Vega, 1997. Biology of selected rice pests on an artificial diet. Mindanao Forum, 12: 43-50.

  68. Demayo, C.G., A.T. Angeles and A.M. Romena, 1997. Variability in development time and sex ratios of selected local populations of striped stem borer Chilo suppressalis from the Philippines. Mindanao Forum, 12: 51-64.

  69. Demayo, C.G. and I.T. Domingo, 1997. Variability in response of selected traditional and IRRI rices to tungro. Mindanao Forum, 12: 113-122.

  70. Demayo, C.G. and A.T. Angeles, 1997. Variability in rice stem borer populations and their response to Bacillus thuringiensis Strains and endotoxins and Its Implications in the development and possible release of Bt-engineered rice. Mindanao Forum, 12: 81-112.

  71. Magbanua, M.J., C.G. Demayo and A.T. Angeles, 1995. Biology of a local population of the striped stem borer Chilo suppressalis (Walker) (Lepidoptera: Pyralidae) and evaluation of its responses to different rice types and Bacillus thuringiensis formulations. Philipp Ent., 95: 479-522.

  72. Demayo, C.G., F.L. Gould, D.G. Bottrell, A.M. Romena and A.T. Angeles, 1994. Geographic variation in larval survival and growth of six striped stem borer Chilo suppressalis (Lepidoptera: Pyralidae) strains on different rice hosts. Environ. Entomol., 23: 1436-1442.

  73. Demayo, C.G., F.L. Gould, D.G. Bottrell, A.M. Romena and A.T. Angeles, 1994. Geographic variation in larval survival and growth of five yellow stem borer Scirpophaga incertulas (Lepidoptera: Pyralidae) strains on different rice hosts. Philipp Ent., 23: 1428-1435.
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  74. Demayo, C.A.A., R.C. Barrion, Saxena and I. Domingo, 1994. Genetic variation in natural populations of the green leafhopper, Nephotettix virescens distant from the philippines. Philipp. Ent., 9: 302-312.

  75. Demayo, C.A.A., R.C. Barrion, Saxena and I. Domingo, 1994. Cytological and allozyme differentiation in the green leafhopper, Nephotettix virescens Distant adapted in rices with known genes for resistance. Philipp. Ent., 9: 313-323.

  76. Demayo, C.A.A., R.C. Barrion, S.Z.R. Khan, M. Tudor and M. Caoili, 1994. Cytological and biochemical differences between the two species of rice leaffolders, Cnaphalocrocis medinalis and Marasmia patnalis from the Philippines. Philipp. Ent., 9: 324-349.

  77. Bottrell, D.G., R.M. Aguda, F.L. Gould, W. Theunis, C.G. Demayo and W.F. Magalit, 1992. Potential strategies for prolonging the usefulness of Bacillus thuringiensis in engineered rice. Korean J. Applied Entomol., 31: 247-255.

  78. Demayo, C.G., R.C. Saxena and A.A. Barrion, 1990. Allozyme variations in natural populations of the brown planthopper, Nilaparvata lugens from the Philippines. Philipp. Ent., 8: 737-748.

  79. Demayo, C.G., R.C. Saxena and A.A. Barrion, 1990. Allozyme variations among biotypes of the brown planthopper, Nilaparvata lugens (Stal). Biochem. Genet., 29: 115-123.
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  80. Demayo, C.G., R.C. Saxena and A.A. Barrion, 1988. Morphological, cytological and biochemical differences among green leafhopper Nephotettix species (Homoptera: Cicadellidae) in the philippines. Philipp. Ent., 7: 359-385.
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