DEL – D’ Ombre et de Lumière 

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Statistics

Breeding statistics

Breeding activity period	2016–2024 (7 years, 10 months)

Declared litters	42 litters, 465 pups
⨽ internal (born in the rattery)	⨽ 30 litters, 321 pups
⨽ external (other contributed litters)	⨽ 12 litters, 144 pups

All rat records	464 rats
⨽ females	⨽ 246 females (53 %)
⨽ males	⨽ 218 males (47 %)

Litter statistics

Average mother age	232 days (7.6 months)
Average father age	497 days (16.3 months)
Average litter size	11.1 pups per litter
Average sex ratio	0.886 (about 9 females for 8 males)

Lifespan statistics

Bred rats recorded as deceased	251 rats (78.4 % of recorded bred rats)
⨽ declared with known date	⨽ 244 rats (97.2 %)
⨽ presumed dead	⨽ 7 rats (2.8 %)

Average lifespan of bred rats	23.2 months (♀: 25.5 months – ♂: 20.4 months)
⨽ infant mortality excluded	⨽ 24.5 months (♀: 26.7 months – ♂: 21.8 months)
⨽ accidents excluded	⨽ 25.5 months (♀: 27.5 months – ♂: 22.9 months)

Oldest bred rat	DEL-MOL Seren (deceased at 4 years, 19 days)

Death causes statistics

Primary death causes by decreasing frequency

25 %	Respiratory
21.31 %	Other
9.43 %	Old age, natural death (from 24 month old minimum)
8.61 %	Unknown cause
7.79 %	Accidents, traumas, poisonings
6.97 %	Neurological (brain, spinal cords, nerves)
5.33 %	Infant mortality (up to 6 week old)
4.51 %	Digestive
3.69 %	Cardiovascular
2.87 %	Reproductive system
2.87 %	Eye, ear, mouth, face
0.82 %	Urinary system (kidney, bladder)
0.82 %	Skin

Secondary death causes by decreasing frequency

16.8 %	Undetermined tumor (affected organ unknown)
10.66 %	Bronchitis, pneumonia
9.84 %	*Respiratory
9.43 %	*Old age, natural death (from 24 month old minimum)
8.61 %	Undetermined cause (known date)
5.33 %	*Infant mortality (up to 6 week old)
3.69 %	*Neurological (brain, spinal cords, nerves)
3.28 %	Lung tumor
2.87 %	Veterinary accident (anesthesia during a minor operation, medical error, etc.)
2.87 %	*Other
2.46 %	Domestic accident (crush, door...)
2.05 %	Heart failure, valvular disease
2.05 %	Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
1.64 %	Pituitary tumor
1.64 %	Digestive tumor (stomach, liver, pancreas, intestines...)
1.23 %	Zymbal gland tumor
1.23 %	Other heart or vascular problem
1.23 %	Undetermined infection or abscess
0.82 %	Complications of gestation or parturition
0.82 %	Mammary tumor
0.82 %	Intestinal obstruction (excluding megacolon)
0.82 %	Other digestive trouble
0.82 %	Facial tumor (excluding Zymbal tumor)
0.82 %	Other respiratory trouble
0.82 %	Uterine tumor
0.82 %	Stroke
0.82 %	Epilepsy
0.41 %	Other reproductive system disorder
0.41 %	Heart attack, infarct, pulmonary embolism
0.41 %	Skin tumor, skin cancer
0.41 %	Hereditary megacolon
0.41 %	Tooth abscess
0.41 %	Food poisoning
0.41 %	Renal failure
0.41 %	Liver failure
0.41 %	Digestive hemorrhage
0.41 %	Euthanasia without medical cause
0.41 %	Kidney tumor
0.41 %	Subcutaneous abscess
0.41 %	Pulmonary edema
0.41 %	*Eye, ear, mouth, face

Related entries

Last contributed litters

See all

State	Birth date	Dam	Sire	Size	Actions
✓	08/09/2024	OPR Mélitée du Mélampyre	DEL Othello	8
✓	25/06/2024	DEL The Secret of MIMH	MIL Alcatraz	12
✓	26/05/2024	EPR Brocéliande	NAM Ghost in the Rain	11
✓	31/03/2024	HDL Mumière	DEL-LVM Vélociraptor	17
✓	31/10/2023	DEL Tsireya	CRV XBox	14
✓	28/09/2023	OPR Nom d'une Chandelle !	DTC-PLS Hyperbolic Discounting	6
✓	30/04/2023	DEL-LVM Rexy	CDC-DNA Barbouille	10
✓	04/03/2023	DEL Utopia	ARK Babe	16
✓	27/02/2023	LVM Tilly	DEL-DNR Odyssey of the 12th Talisman	6
✓	28/12/2022	DEL-ARD Naiad	ARK Grinch	2

Recently modified rats

See all

State	Identifier	Prefix	Name	Pup Name	Birth	Age	Death cause	Sex	Actions
✓	DEL56763F	DEL-ARD	Naiad †		07/02/2022	25 mo	Respiratory	♀
✓	DEL60252F	DEL	Creamy	Frénégonde de Pouille	26/05/2024	7 mo	– alive –	♀
✓	DEL57572M	DEL-LVM	Samy †	Dilophosaure	11/10/2022	23 mo	Lung tumor	♂
✓	DEL57525F	DEL	Drop Dead Diva †		03/09/2022	23 mo	Heart attack, etc.	♀
✓	DEL57523F	DEL	Gossip Girl †		03/09/2022	24 mo	Pulmonary edema	♀
✓	DEL57530M	DEL	Rabougris †	Haunted	03/09/2022	26 mo	Bronchitis, pneumonia	♂
✓	DEL57522F	DEL	Utopia †		03/09/2022	25 mo	Kidney tumor	♀
✓	DEL58868M	DEL	Rollmops †	Everything	28/09/2023	8 mo	Mammary tumor	♂
✓	DEL58867M	DEL	Kermit	Experimenter	28/09/2023	15 mo	– alive –	♂
✓	DEL60249F	DEL	Pamela Rose		26/05/2024	7 mo	– alive –	♀