@article{oai:soar-ir.repo.nii.ac.jp:00012286,
 author = {UWA,  HIROSHI},
 issue = {1},
 journal = {信州大学理学部紀要},
 month = {Dec},
 note = {A physiological study has been made of the initial phase of fertilization in the medaka, Oryzias latipes. It was found that the effective attachment of a spermatozoon to the ovoplasm was established within 5 seconds after insemination. However, average reaction time for the breakdown of cortical alveoli evoked by stimulation of the spermatozoon or by pricking of the egg was 47±8 seconds and 20±3 seconds, respectively. Single stimulation by pricking is sufficient to evoke the excitation of ovoplasm. It was calculated, therefore, that the stimulus by the spermatozoon evoked the excitation of ovoplasm about 27 seconds after insemination. From these results, it was concluded that the effective attachment of a spermatozoon to the ovoplasm was attained prior to the activation of ovoplasm., Article, 信州大学理学部紀要 2(1): 87-94(1967)},
 pages = {87--94},
 title = {A Study on Relationship between Sperm Penetration and Egg Activation in the Medaka, Oryzias latipes},
 volume = {2},
 year = {1967}
}