| 11. | The genetics of the color variants of the axolotl have also been widely studied.
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| 12. | Climate change has also immensely affected axolotls and their populations throughout the southern Mexico area.
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| 13. | The axolotl is therefore used as a model for the development of limbs in vertebrates.
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| 14. | A single typical axolotl typically requires a tank with a water depth of at least.
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| 15. | Paedomorphosis can be observed in the axolotl.
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| 16. | Patzcuaro salamanders have been hybridized with axolotls, and used in mitochondrial studies for comparison.
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| 17. | Axolotl was featured in a main article in the August 2007 issue of The Wire.
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| 18. | Tilapia and carp directly compete with axolotls by consuming their eggs, larvae, and juveniles.
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| 19. | ,wild axolotls were near extinction due to urbanization in Mexico City and consequent water pollution.
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| 20. | Axolotls can also eat feeder fish, but care should be taken as fish may contain parasites
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