MGR – Les Magist-Rats 

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Statistics

Breeding statistics

Breeding activity period	2021–2025 (3 years, 4 months)

Declared litters	19 litters, 177 pups
⨽ internal (born in the rattery)	⨽ 13 litters, 133 pups
⨽ external (other contributed litters)	⨽ 6 litters, 44 pups

All rat records	168 rats
⨽ females	⨽ 86 females (51.2 %)
⨽ males	⨽ 82 males (48.8 %)

Litter statistics

Average mother age	242 days (7.9 months)
Average father age	476 days (15.6 months)
Average litter size	9.3 pups per litter
Average sex ratio	0.953 (about 1 female for 1 male)

Lifespan statistics

Bred rats recorded as deceased	62 rats (50 % of recorded bred rats)
⨽ declared with known date	⨽ 61 rats (98.4 %)
⨽ presumed dead	⨽ 1 rat (1.6 %)

Average lifespan of bred rats	16 months (♀: 17.5 months – ♂: 14.4 months)
⨽ infant mortality excluded	⨽ 17.1 months (♀: 18.6 months – ♂: 15.4 months)
⨽ accidents excluded	⨽ 18.6 months (♀: 19.9 months – ♂: 17.1 months)

Oldest bred rat	MGR-MIL Fobia (deceased at 2 years, 7 months, 12 days)

Death causes statistics

Primary death causes by decreasing frequency

37.7 %	Respiratory
13.11 %	Other
9.84 %	Reproductive system
8.2 %	Unknown cause
8.2 %	Accidents, traumas, poisonings
6.56 %	Infant mortality (up to 6 week old)
6.56 %	Neurological (brain, spinal cords, nerves)
4.92 %	Eye, ear, mouth, face
1.64 %	Skin
1.64 %	Muscles and skeleton
1.64 %	Digestive
1.64 %	Old age, natural death (from 24 month old minimum)

Secondary death causes by decreasing frequency

18.03 %	*Respiratory
14.75 %	Bronchitis, pneumonia
11.48 %	Virus, epidemic outbreak, immune deficiency (SDA, Sendai, Tyzzer...)
8.2 %	Mammary tumor
6.56 %	Undetermined cause (known date)
6.56 %	Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
3.28 %	Pituitary tumor
3.28 %	*Infant mortality (up to 6 week old)
1.64 %	Stillborn
1.64 %	Lung tumor
1.64 %	Brain tumor
1.64 %	Sepsis
1.64 %	Other respiratory trouble
1.64 %	Subcutaneous abscess
1.64 %	Tooth abscess
1.64 %	Uterine tumor
1.64 %	Pulmonary edema
1.64 %	Zymbal gland tumor
1.64 %	Bone tumor
1.64 %	Falls, fractures, head or spinal cord trauma (excluding fights)
1.64 %	Digestive tumor (stomach, liver, pancreas, intestines...)
1.64 %	Other infant mortality cause
1.64 %	Stroke
1.64 %	Facial tumor (excluding Zymbal tumor)
1.64 %	*Old age, natural death (from 24 month old minimum)
1.64 %	*Unknown cause

Related entries

Last contributed litters

See all

State	Birth date	Dam	Sire	Size	Actions
✗	15/04/2025	MIL Marla	MGR-MIL Taz	10
✗	04/04/2025	MIL Narissa	MGR-MIL Naos	12
✓	08/01/2025	RMS-MIL Layette	MGR Anatole	9
✓	07/01/2025	RMS-MIL Cousette	MGR-MIL Taz	11
✓	25/08/2024	MGR-MIL Flora	VIC Tyrell	3
✓	19/08/2024	MGR-MIL Daffy	MIL Fievel	11
✓	22/01/2024	MIL Mavis	MIL-MGR T'choupi	10
✓	21/01/2024	MGR-MIL Beth	PLS Kenny	13
✓	31/12/2023	VIC Cosma	PLS Dunkan	12
✓	25/11/2023	MGR-MIL Frou-Frou	MIL Orion	8

Recently modified rats

See all

State	Identifier	Prefix	Name	Pup Name	Birth	Age	Death cause	Sex	Actions
✓	MGR61400F	MGR	Marabel	Marabel	15/04/2025	1 mo	– alive –	♀
✓	MGR61399F	MGR	Jelly	Jelly	15/04/2025	1 mo	– alive –	♀
✓	MGR60136M	MGR-MIL	Vermicelle †		08/04/2023	24 mo	Bronchitis, pneumonia	♂
✓	MGR60138M	MGR-MIL	Bean	Gnocchi	08/04/2023	25 mo	– alive –	♂
✓	MGR59805M	MGR	Éden		21/01/2024	16 mo	– alive –	♂
✓	MGR59804M	MGR	Lazarus		21/01/2024	16 mo	– alive –	♂
✓	MGR59803M	MGR-MIL	Isaac		31/12/2023	16 mo	– alive –	♂
✓	MGR60142F	MGR-MIL	Little Spoon †	Linguine	08/04/2023	24 mo	Mammary tumor	♀
✓	MGR60143F	MGR-MIL	Miss Fidji †	Fideua	08/04/2023	24 mo	Mammary tumor	♀
✓	MGR60144F	MGR-MIL	Asuna †	Orechiette	08/04/2023	24 mo	Mammary tumor	♀