. Animal life as affected by the natural conditions of existence. Animal ecology. 124 THE I5FLUEXCE OF INAXIiMATE SHRItOUNDINGS. thenogeiiesis were not exposed to the effect of cold, but kept in a constant summer heat, and at the same time supplied with suitable food, no males would occur, and the young would be uninterruptedly produced by the parthenogenetic mode. In fact Reaumur did succeed in this way in producing artificially above fifty parthenogenetic generations in the course of three or four years, all descended from one mother. The converse ex- periment has never, so far as I know, be
. Animal life as affected by the natural conditions of existence. Animal ecology. 124 THE I5FLUEXCE OF INAXIiMATE SHRItOUNDINGS. thenogeiiesis were not exposed to the effect of cold, but kept in a constant summer heat, and at the same time supplied with suitable food, no males would occur, and the young would be uninterruptedly produced by the parthenogenetic mode. In fact Reaumur did succeed in this way in producing artificially above fifty parthenogenetic generations in the course of three or four years, all descended from one mother. The converse ex- periment has never, so far as I know, been made—namely, whether it would be possible to produce males in the spring by. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Semper, C. (Carl), 1832-1893. New York, D. Appleton
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