Captive care and breeding of Pachyhynobius shangchengensis

FrogEyes

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Frank PASMANS, Geert P. J. JANSSENS, Max SPARREBOOM, Jianping JIANG and Kanto NISHIKAWA,, 2012. Reproduction, Development, and Growth Response to Captive Diets in the Shangcheng Stout Salamander, Pachyhynobius shangchengensis (Amphibia, Urodela, Hynobiidae). Asian Herpetological Research 3(3): 192-197

Abstract [FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]The Shangcheng stout salamander ([/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]Pachyhynobius shangchengensis[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]) is a poorly known stream dwelling hynobiid salamander from China. We studied the reproduction, development and growth response of the salamander to different diets in captivity. Two females each produced two unique, striated egg sacs, with each containing 18 and 20, and 22 and 32 white eggs with an average diameter of 3.3 mm. Hatchlings (n = 27) had front- and hind-limb buds [/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]with interdigit membranes and a large yolk sac, and developed cornified finger and toe tips during further development. [/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]Metamorphosis occurred between d 441 and d 454 after hatching at an average total length of 94.8 mm (n = 21). These [/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]reproductive and developmental traits fit in well with the ancestral state reconstruction in hynobiids. If corrected for [/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]dry mass, feed conversion ratios obtained by feeding bloodworms (Chironomidae) to [/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]P. shangchengensis [/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]larvae and mealworms ([/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]Tenebrio molitor[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]) to postmetamorphs, were very low (0.33 and 0.34 respectively), equaling a very high [/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]mass conversion efficiency.[/FONT][/FONT]
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  • Not Albino Alex:
    And even .25 ammonia is bad what you want for nitrite and ammonia is 0 and .25 for short periods
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  • faebugz:
    @DarthNyQuil, what's your ph? Ammonia is non-toxic at lower ph so might not need to panic, however if you have hard water (think calcium deposits in a tea kettle), you likely have a high pH and thus should be maintaining 0. Either way, use seachem prime to dechlorinate your water and get the added benefit of making ammonia and nitrite non-toxic for 24 hours, the peace of mind is worth it.
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  • faebugz:
    @DarthNyQuil, to cycle more quickly/safely, see if you have a friend or trusted LFS with some filter media you could add to your filter. It will cycle it almost instantly, far better than bottled stuff. Speaking of bottled insta-cycle, some people swear by tetra safe start, although I've never used it myself so can't vouch for it. And finally to make it more safe, feel free to do larger water changes to get that ammonia lower- 90% of the bacteria you're growing is in the filter, 9% on surfaces, and maybe 1%> in the water column. So even a
    100% water change won't really effect the cycle process
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  • lvlyvoa:
    hey thank you all so much for your help!! i shouldn't have been so careless, but I love my axie very much and her behaviour has improved as I have started a tank cycle and gotten some good food for her
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  • faebugz:
    @lvlyvoa, good to hear, np. They love nightcrawlers and worms if you have access to them, they're the healthiest thing they can eat since they're a complete prey
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  • BrodieBAxolotls:
    hey, does anyone have any brine shrimp eggs??
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  • liz.:
    i do!
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  • Jaeger:
    My axolotls were doing fine until the cycle int heir tank crashed. I currently have them tubbed and they wont stop shedding their slime coat, and my golden albino looks a little red, and his gills dont look too good. Theyre both flaoting and im keeping the tub at 18 degrees celsius and doing 100% water changes everyday, any help on anythingelse? can anyone help?
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  • AkemiYousei:
    @Jaeger I would try to double up on Prime to combat the slime coat shed when doing the 100% water changes. Also, if it's bad, might want to consider a tea bath as a preventive measure.
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  • AxolotlMama:
    I just wrote this on the post ^
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  • AkemiYousei:
    Haha, great minds, right?
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  • AxolotlMama:
    They sure do 😄!
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  • Jaeger:
    @AkemiYousei thanks so much. Will do. I have also given them a tea bath before, seems to work their gills are looking so much healthier, my golden albino is swimming around frantically trying to jump out, should i be worried? my wild type is fine
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  • AkemiYousei:
    Might be the stress, or the shedding bothering it
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  • AkemiYousei:
    Make sure s/he can't jump out, and maybe keep her in a undisturbed, darkened place for a bit. See if that calms the goldie.
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  • Jaeger:
    I woke up to my golden axolotl covered complete white. what do i do
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  • Jaeger:
    Just found out, hes dead. :(
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  • mcapanema:
    :'(
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  • AkemiYousei:
    @Jaeger, Oh no! Sorry to hear. :(
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  • AxelTheAxolotl123:
    my axolotl has white balls on its gills and the feathers have shrunk
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    AxelTheAxolotl123: my axolotl has white balls on its gills and the feathers have shrunk +1
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