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- W2005485362 abstract "The sexual apparatus was studied in 100 adult axolotls (Siredon mexicanum) for 13 different spawnings. The ages of the animals varied between two and six years. Additional material from Indiana University was also studied. Altogether there were 55 female and 52 male adult axolotls represented. The purpose of the study was to investigate the limits of the variations occurring in normal axolotls and to compare the incidences of variations and developmental abnormalities in adult animals of both sexes at various ages and belonging to different strains. Among the 13 spawnings examined, five strains were completely normal in 100% of the animals, but the remaining eight strains all included abnormal animals. The incidence of abnormal animals in some of these latter strains was 40% or even 50%. Since all of the animals were under the same conditions, the variability and the occurrence of developmental abnormalities most likely depended upon hereditary factors. Among 55 females, only seven (12.7%) were abnormal; only four of these had developmental abnormalities, and only one was hermaphrodite. Among 45 males from the author's axolotl colony, 16 (28%) were abnormal. Of these latter, six had no sex cells or very few; this variation must be regarded as a developmental abnormality. All of these malformations resulted from major degeneration processes and abnormal morphogenesis. Arrested development was also observed in many males. Spermatozoa were completely absent from the testes of eight animals. In the additional material from Indiana University (testes from 7 males), there was also one completely abnormal testis with major degeneration processes and complete absence of sex cells. It is evident that variability and the incidence of developmental abnormalities in the sexual apparatus in adult axolotls of some strains are very great." @default.
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- W2005485362 date "1971-04-01" @default.
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- W2005485362 title "Variations and developmental abnormalities in the sexual apparatus of the adult axolotl (Siredon mexicanum)" @default.
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- W2005485362 doi "https://doi.org/10.1002/jmor.1051330408" @default.
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