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On rare occasions, gargoyle geckos can reproduce asexually via parthenogenesis. In their native habitat of southern New Caledonia, they have been known to sustain themselves from a mixed diet. One study [ 3 ] found that they regularly consume a wide taxonomic and ecological variety of arthropods , lizard prey including geckos and skinks, and ...
Parthenogenesis is a mode of asexual reproduction in which offspring are produced by females without the genetic contribution of a male. Among all the sexual vertebrates, the only examples of true parthenogenesis, in which all-female populations reproduce without the involvement of males, are found in squamate reptiles (snakes and lizards). [1]
Some documented species, specifically salamanders and geckos, that rely on obligate parthenogenesis as their major method of reproduction. As such, there are over 80 species of unisex reptiles (mostly lizards but including a single snake species), amphibians and fishes in nature for which males are no longer a part of the reproductive process ...
Most geckos lay a small clutch of eggs. Some are live-bearing, and a few can reproduce asexually via parthenogenesis. Geckos also have a large diversity of sex-determining mechanisms, including temperature-dependent sex determination and both XX/XY and ZZ/ZW sex chromosomes with multiple transitions among them over evolutionary time. [58]
The Komodo dragon, which normally reproduces sexually, has also been found able to reproduce asexually by parthenogenesis. [54] A case has been documented of a Komodo dragon reproducing via sexual reproduction after a known parthenogenetic event, [ 55 ] highlighting that these cases of parthenogenesis are reproductive accidents, rather than ...
As well as this, sexually reproducing geckos are reported to be more robust and have higher survival rates than those which reproduce asexually. [12] There is a positive correlation between size and viability of eggs, with larger geckos having eggs which were more likely to survive.
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These species consist of all females who reproduce asexually with no need for males. This is known to occur in various species of whiptail lizards. [25] Parthenogenesis was also recorded in species that normally reproduce sexually. A captive female Komodo dragon produced a clutch of eggs, despite being separated from males for over two years. [26]