LMM – Raterie La Maison MRDoo 

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Statistics

Breeding statistics

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

Declared litters	9 litters, 68 pups
⨽ internal (born in the rattery)	⨽ 9 litters, 68 pups
⨽ external (other contributed litters)	⨽ 0 litter, no pup

All rat records	68 rats
⨽ females	⨽ 30 females (44.1 %)
⨽ males	⨽ 38 males (55.9 %)

Litter statistics

Average mother age	232 days (7.6 months)
Average father age	528 days (17.3 months)
Average litter size	7.6 pups per litter
Average sex ratio	1.267 (about 14 males for 11 females)

Lifespan statistics

Bred rats recorded as deceased	33 rats (48.5 % of recorded bred rats)
⨽ declared with known date	⨽ 30 rats (90.9 %)
⨽ presumed dead	⨽ 3 rats (9.1 %)

Average lifespan of bred rats	22.4 months (♀: 20.5 months – ♂: 23.2 months)
⨽ infant mortality excluded	⨽ 23.1 months (♀: 23 months – ♂: 23.2 months)
⨽ accidents excluded	⨽ 24.4 months (♀: 23 months – ♂: 25 months)

Oldest bred rat	LMM Cortex (deceased at 3 years, 1 month, 26 days)

Death causes statistics

Primary death causes by decreasing frequency

23.33 %	Unknown cause
20 %	Respiratory
16.67 %	Other
13.33 %	Accidents, traumas, poisonings
6.67 %	Old age, natural death (from 24 month old minimum)
6.67 %	Urinary system (kidney, bladder)
6.67 %	Cardiovascular
3.33 %	Digestive
3.33 %	Infant mortality (up to 6 week old)

Secondary death causes by decreasing frequency

23.33 %	Undetermined cause (known date)
10 %	Pulmonary edema
6.67 %	Heatstroke
6.67 %	Virus, epidemic outbreak, immune deficiency (SDA, Sendai, Tyzzer...)
6.67 %	Undetermined tumor (affected organ unknown)
6.67 %	Lung tumor
6.67 %	*Old age, natural death (from 24 month old minimum)
3.33 %	Other heart or vascular problem
3.33 %	Digestive tumor (stomach, liver, pancreas, intestines...)
3.33 %	Domestic accident (crush, door...)
3.33 %	Urethral obstruction, urinary retention, stones
3.33 %	Kidney tumor
3.33 %	Other tumor (salivary, spleen, adrenal, thyroid...)
3.33 %	Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
3.33 %	Heart attack, infarct, pulmonary embolism
3.33 %	*Infant mortality (up to 6 week old)
3.33 %	*Respiratory

Related entries

Last contributed litters

See all

State	Birth date	Dam	Sire	Size	Actions
✓	27/05/2025	IND Louana	Unknown	9
✓	04/04/2024	IND Phoebe	INC Apollo	10
✓	30/03/2024	LMM Urumi	LMM Julien	7
✓	11/02/2024	IND Rachel	LMM Ackerman	9
✓	04/09/2023	IND Lushiita	LMM Gomez	12
✓	06/01/2023	INC Hayley	LMM Boo	4
✓	24/12/2022	LMM Freyja	LMM Boo	3
✓	21/07/2022	LMM Freyja	LMM Boo	13
♺	15/06/2022	INC Hayley	IND Onizuka	15
♺	29/04/2022	IND Vi	LMM Asmar	9

Recently modified rats

See all

State	Identifier	Prefix	Name	Pup Name	Birth	Age	Death cause	Sex	Actions
✓	LMM62058M	LMM	Dolce	Spellman	30/03/2024	22 mo	– alive –	♂
✓	LMM62072F	LMM	Moon	Nagisa	04/09/2023	29 mo	– alive –	♀
✓	LMM62073F	LMM	Alaska	Nanako	04/09/2023	29 mo	– alive –	♀
✓	LMM62074F	LMM	Nao	Nao	04/09/2023	29 mo	– alive –	♀
✓	LMM62075M	LMM	Tiramisu †	Hiroshi	04/09/2023	21 mo	Kidney tumor	♂
✓	LMM59772F	LMM	Anko	Anko	04/09/2023	29 mo	– alive –	♀
✓	LMM62076M	LMM	Kashmir	Kunio	04/09/2023	29 mo	– alive –	♂
✓	LMM59773F	LMM	Miyabi	Miyabi	04/09/2023	29 mo	– alive –	♀
✓	LMM62077M	LMM	Noboru	Noboru	04/09/2023	29 mo	– alive –	♂
✓	LMM59774F	LMM	Grany †	Julia	04/09/2023	18 mo	Undetermined cause	♀