MGR – Les Magist-Rats 

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Statistics

Breeding statistics

Breeding activity period	2021–2025 (3 years, 1 month)

Declared litters	18 litters, 174 pups
⨽ internal (born in the rattery)	⨽ 12 litters, 130 pups
⨽ external (other contributed litters)	⨽ 6 litters, 44 pups

All rat records	155 rats
⨽ females	⨽ 80 females (51.6 %)
⨽ males	⨽ 75 males (48.4 %)

Litter statistics

Average mother age	241 days (7.9 months)
Average father age	463 days (15.2 months)
Average litter size	9.7 pups per litter
Average sex ratio	0.938 (about 1 female for 1 male)

Lifespan statistics

Bred rats recorded as deceased	57 rats (46.7 % of recorded bred rats)
⨽ declared with known date	⨽ 56 rats (98.2 %)
⨽ presumed dead	⨽ 1 rat (1.8 %)

Average lifespan of bred rats	15.3 months (♀: 16.6 months – ♂: 14 months)
⨽ infant mortality excluded	⨽ 16.4 months (♀: 17.8 months – ♂: 15.1 months)
⨽ accidents excluded	⨽ 18 months (♀: 19.2 months – ♂: 16.8 months)

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

Death causes statistics

Primary death causes by decreasing frequency

37.5 %	Respiratory
14.29 %	Other
8.93 %	Unknown cause
8.93 %	Accidents, traumas, poisonings
7.14 %	Infant mortality (up to 6 week old)
7.14 %	Neurological (brain, spinal cords, nerves)
5.36 %	Reproductive system
5.36 %	Eye, ear, mouth, face
1.79 %	Skin
1.79 %	Muscles and skeleton
1.79 %	Digestive
1.79 %	Old age, natural death (from 24 month old minimum)

Secondary death causes by decreasing frequency

19.64 %	*Respiratory
12.5 %	Bronchitis, pneumonia
12.5 %	Virus, epidemic outbreak, immune deficiency (SDA, Sendai, Tyzzer...)
7.14 %	Undetermined cause (known date)
7.14 %	Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
3.57 %	Mammary tumor
3.57 %	Pituitary tumor
3.57 %	*Infant mortality (up to 6 week old)
1.79 %	Stillborn
1.79 %	Lung tumor
1.79 %	Brain tumor
1.79 %	Sepsis
1.79 %	Other respiratory trouble
1.79 %	Subcutaneous abscess
1.79 %	Tooth abscess
1.79 %	Uterine tumor
1.79 %	Pulmonary edema
1.79 %	Zymbal gland tumor
1.79 %	Bone tumor
1.79 %	Falls, fractures, head or spinal cord trauma (excluding fights)
1.79 %	Digestive tumor (stomach, liver, pancreas, intestines...)
1.79 %	Other infant mortality cause
1.79 %	Stroke
1.79 %	Facial tumor (excluding Zymbal tumor)
1.79 %	*Old age, natural death (from 24 month old minimum)
1.79 %	*Unknown cause

Related entries

Last contributed litters

See all

State	Birth date	Dam	Sire	Size	Actions
✓	08/01/2025	RMS-MIL Layette	MGR Anatole	9
✓	07/01/2025	RMS-MIL Cousette	MGR-MIL Taz	11
✓	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
✓	23/11/2023	RB. Daphné	VIC-MIL Socrate	10
✓	06/07/2023	MIL Vaneloppe	MGR-MIL Razmotte	16
✓	08/04/2023	VIC Ondine	MGR-MIL Enigma	14

Recently modified rats

See all

State	Identifier	Prefix	Name	Pup Name	Birth	Age	Death cause	Sex	Actions
✓	MGR59124F	MGR	Mirabel †		21/01/2024	11 mo	Virus, epidemic outbreak, etc.	♀
✓	MGR60139M	MGR-MIL	Moccha †	Orzo	08/04/2023	22 mo	Zymbal gland tumor	♂
✓	MGR59019M	MGR-MIL	Sirius †	Terek	25/11/2023	13 mo	Respiratory	♂
✓	MGR59162M	MGR	Anatole †	Muscari	06/07/2023	19 mo	Tooth abscess	♂
✓	MGR58871F	MGR-MIL	Beth †	Stelline	08/04/2023	16 mo	Digestive tumor	♀
✓	MGR60671M	MGR	Dingo	Pineywoods	19/08/2024	7 mo	– alive –	♂
✓	MGR58574F	MGR	Vixy †	Ipomée	06/07/2023	18 mo	Bone tumor	♀
✓	MGR59010F	MGR-MIL	Doucette †	Coquillette	08/04/2023	22 mo	Facial tumor	♀
✓	MGR59982F	MGR	Bulma †	Jacinthe	06/07/2023	17 mo	Uterine tumor	♀
✓	MGR60293M	MGR-MIL	Nounours †		31/12/2023	12 mo	Virus, epidemic outbreak, etc.	♂