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Date Posted: 09:19:34 11/10/01 Sat
Author: Mark
Subject: Re: Reproductive frequency in Glaucomys Volans
In reply to: Beverly 's message, "Re: Reproductive frequency in Glaucomys Volans" on 06:19:30 11/10/01 Sat

Bev, got your e-mail but I am on the way out the door but wanted to throw a little known fact to you. MANY rodent species breed back shortly after the first litter is born. It is a way of keeping the population up. This is triggered by several factors , abundance of food, population & lighting. So if you are feeding heavy and not many in the area they will produce a second litter. Also the female must be in perfect health too. If the first litter did not draw her down she is receptive to the male whie nursing. this is if she is out of the next on a feeding run. Now if she is having to defend the next from a male needing protein then no she will not breed. So as you can see the males health is a big issue too. Well I have to run to build more cages to get ready for all my new breeders (I am setting up over 800 breeders this year). I will try to answer your e-mail this evening.
Mark



>Thanks, Mark. I'm going to "e" you a further line on
>this question. I had it all typed in here, but my AOL
>is SOL, today! (So what else is new, as some folks
>say...) When I hit send, it gave me "system not
>responding" - Dang! Anyway, the gist of the question
>is, is a 12 week delivery to delivery span the norm?
>Do GV's experience a "whelping" heat? Many creatures
>do; but many others enjoy a sort of "natural" birth
>control, when the female is lactating. Would it have
>been more common for my GV to have weaned her pups
>before becoming pregnant with her second litter?
>(Boy, I hope this works, this time!) (P.S., Yeah,
>Texas! Yeah, Bush!)
>>Beverly, the Texas sub species of GV usually has two
>>litters a year. The only sub species that routinely
>>has two litters a year. The GV along the east coast
>>including Florida usually on average has only one
>>litter and a smaller litter than the Texas Sub
>>species. they are all the same species but things are
>>always bigger & better in Texas..LOL
>>
>>
>>
>>>Greetings, and Best Wishes for much luck with your
>new
>>>forum, Mark. It's my understanding that you are a
>>>commercial breeder of domestic GV's, and wonder if
>>>you've found the reproductive cycle to be as close as
>>>I experienced. My female, a fall '98 herself,
>>>produced her first litter this February,(1 m & 1 f),
>>>and her second litter just 12 weeks later (2 m & 1
>f).
>>>She has been with a same-age male since her arrival
>>>here. All 5 youngsters were well cared for, and
>>>developed nicely. The first litter, I kept. The
>>>second, I kept the female, and found an excellent
>home
>>>for the males, with the local BOCES Outdoor Learning
>>>Lab, separating them from their family at 7 weeks. I
>>>was especially glad to see them go together, and thus
>>>far, they are doing very well, and helping introduce
>>>youngsters to these wonderful creatures. I was
>>>concerned about the quickness of the female's second
>>>litter arrival. I was expecting a longer fallow
>>>period. I am on L.I., so I realise my breeding
>months
>>>may be a bit different than yours (You are in Texas,
>>>yes?), but I would expect you would experience a
>>>similar fallow. I researched, by way of a doctoral
>>>thesis obtained through City College, NYU, Queens,
>the
>>>habits of the GV's here on L.I., but of course, the
>>>breeding in the wild bears little resemblance to
>>>captive breeding. Predation, habitat competition, and
>>>nutrition factors place considerable stresses on the
>>>wild population that the domestic population do not
>>>suffer. Will you share your knowledge of this issue
>>>with us? TYVM!

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