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Brown rat

en.wikipedia.org/wiki/Brown_rat

The brown rat, also referred to as common rat, street rat, sewer rat, Hanover rat, Norway rat, ... Stories of rats attaining sizes as big as cats are exaggerations, .... by a factor of three and a h...

Rat Reproduction: Mating, Gestation, Birthing, and Growth

www.peteducation.com/article.cfm?aid=889

Rats do not have a breeding season, although very hot or cold temperatures will reduce breeding. .... In rats, the average litter size is 6-13 pups. The first sign is ...

20 Things You Didn't Know About... Rats | DiscoverMagazine.com

discovermagazine.com/2006/dec/20-things-rats

Dec 7, 2006 ... Jack Black the royal rat catcher, Jacko the world-champion rat killer, rats ... females can only have up to 4 litters in a life time, and the litter size ...

Mice & Rat Reproduction - Animal Hospitals USA…

www.animalhospitals-usa.com/small-pets/mice-and-rats/mice-rat-reproduction.html

Sexually mature male mice and rats usually exhibit prominent scrotum. ... Litter sizes average 10-12 pups, though it is not unusual for a female's first litter to be ...

Fenbendazole treatment and litter size in rats. - NCBI

www.ncbi.nlm.nih.gov/pubmed/17089989

J Am Assoc Lab Anim Sci. 2006 Nov;45(6):35-9. Fenbendazole treatment and litter size in rats. Johnston NA(1), Bieszczak JR, Verhulst S, Disney KE, ...

Influence of litter size on the postnatal growth of rat pups: is ... - NCBI

www.ncbi.nlm.nih.gov/pubmed/19762015

Environ Res. 2009 Nov;109(8):1021-7. doi: 10.1016/j.envres.2009.07.015. Epub 2009 Sep 16. Influence of litter size on the postnatal growth of rat pups: is there ...

Pest Control : Brown Rat

www.knockoutpcs.co.uk/pests/brown-rat.asp

The brown rat can be found native through out the UK and tends to be heavily ... The litter size does vary but an average litter size is 8 with approximately 6 litters  ...

Rat - Are You Attracting Rats and Mice to Your Yard - Department of ...

www.publichealth.lacounty.gov/eh/docs/Specialized/Vector_Management/attractRatsMice.pdf

The house mouse, roof rat, and Norway rat can reproduce year-round when adequate food ... with and average litter size of 4 to 7 pups. Rats can reproduce up ...

Relationship between fetal weight and litter size in rats: application ...

www.ncbi.nlm.nih.gov/pubmed/1463926

Reprod Toxicol. 1992;6(5):453-6. Relationship between fetal weight and litter size in rats: application to reproductive toxicology studies. Romero A(1), Villamayor ...

sex ratios and litter size in the laboratory rat - Journal of Heredity

jhered.oxfordjournals.org/content/49/6/303.full.pdf

SEX RATIOS AND LITTER SIZE IN THE. LABORATORY RAT. J. F. KlDWELL AND H. J. WEETH*. THE chromosome theory of sex de- termination leads to the ...

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AFRMA - Breeding & Stuff - Large Litter of Rat Babies

www.afrma.org

What is the normal litter size for rats? Do they always have this many?! Is the mother rat going to be able to care for 16 babies? What will I need to do for her?

Part 1 Biology - National Fancy Rat Society

www.nfrs.org

Nov 26, 2012 ... Rats can have big litters of 14 or more and two rats can become 100 in ... to mount his own mother successfully due to the difference in size.

REPRODUCTIVE CAPACITY AND LITTER SIZE IN ... - Reproduction

www.reproduction-online.org

Various factors concerned in the regulation of litter size and total reproductive ... litter size have been fairly extensively studied in rats and mice, although most.