Saturday, March 31, 2018

[Herpetology • 2018] Reproductive Biology and Maternal Care of Neonates in southern African Python (Python natalensis)


 Neonate southern African pythons (Python natalensis) basking at the entrance to the nest chamber.

in  Alexander. 2018.  DOI: 10.1111/jzo.12554

Abstract
Reproductive strategies such as parental care have been pivotal in evolutionary innovations such as endothermy in birds and mammals. The diversity of reproductive biology across the squamates provides a unique opportunity for elucidating the selective forces responsible for the evolution of various reproductive strategies. Here, I report on the reproductive biology of the southern African python (Python natalensis), based on a 7-year study of free-ranging pythons, revealing a behavioural complexity not usually expected for snakes. Mating occurred in the austral winter, with individual males following females for more than 2 months. As is typical for pythons, females brooded eggs by coiling around the clutch. Females are capital breeders; they lost ~40% body mass during a breeding event and did not breed in consecutive years. There was no evidence of the facultative thermogenesis that has been reported in congeners, suggesting that facultative thermogenesis has arisen independently more than once in Python. Reproductive females thermoregulated more carefully than non-reproductives, maintaining higher, more stable Tbs at all stages of reproduction, especially while brooding. This was achieved by a stereotypic basking regime facilitated by ‘facultative melanism’, with females darkening significantly for the entire breeding event. Mothers remained with neonates at the nest site for approximately 2 weeks after hatching. During this time, mothers alternated between brief bouts of basking on the surface and coiling around the hatched eggs, on which the neonates rested. Neonates formed an aggregation near the burrow entrance to bask during the day, individually returning to the nest intermittently throughout the day. During the night, neonates remained within the mother's coils on the hatched eggs. This study highlights the diversity of reproductive biology within Python and cautions against generalization in this regard. This is the first unambiguous report of maternal care of neonates in an oviparous snake.


Figure 4.  Neonate southern African pythons (Python natalensis) basking at the entrance to the nest chamber.
 Some of the neonates have already undergone their first shed.

G. J. Alexander. 2018. Reproductive Biology and Maternal Care of Neonates in southern African Python (Python natalensis).  Journal of Zoology.  DOI: 10.1111/jzo.12554

New insights into how southern African pythons look after their babies  theconversation.com/new-insights-into-how-southern-african-pythons-look-after-their-babies-91276
'Cold-blooded' pythons make for caring moms  phy.so/440240120 via @physorg_com

15 comments:

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  2. MY HEALTH IS RESTORE
    i am so happy to share this testimony with the world because generally there are so many doubts about the cure of hpv and cancer This is real take it serious, i am so happy that today i can give this testimony to the world and also help in saving life of people who has been condemned for death just as i was ,who will believe that herbs can cure hpv and cancer completely from the body, i never believe that this will work, i have spend a lot of money getting drugs from the hospital to keep me healthy, it got to a time that all i was waiting for is death to come because i was broke and i already have strong outbreaks from the hpv, one day i was going through the internet asking questions online just to know more about the latest development in the medical sector to see if there is still hope then i stumbled on a post about about this great man called Dr. Ehiagwina through a publicly made a testimony on how she was also cured of ALS by this herbal doctor who is well known for his strong ancient herbal practice at first i doubted both the woman and the doctor just as so many that see's this post would doubt because medically it has been proven impossible but later i decided to give him a try so i emailed him I did not believe him that much, I just wanted to give him a try, he replied my mail and Needed some Information about me, then I sent them to him, he prepare herbal medicine and sent it through Courier Service for delivery, he gave my details to the Courier Office. they told me that 3-5 days I will receive the package and after receiving it, i took the medicine as prescribed by him at the end of 13days that the medicine lasted, he told me to go to the hospital for a test, and i went, surprisingly after the test the doctor confirm me hpv negative and cancer disappear i thought it was a joke, i went to other hospitals and was also negative the doctors were speechless and i said it was a miracle, thank you sir for saving my life even if you cannot see this post i shall never stop testifying the impact you made in my life by restoring back my life when i was being stigmatized and even avoided by family and friends , I promise I will always testify of your good works. Dr. Ehiagwina contact: ehiagwinaherbalhome@gmail.com OR call +2348162084504 you can also add him on whatsapp.

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