DEL – D’ Ombre et de Lumière 

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Statistics

Breeding statistics

Breeding activity period	2016–2026 (9 years, 6 months)

Declared litters	54 litters, 606 pups
⨽ internal (born in the rattery)	⨽ 40 litters, 436 pups
⨽ external (other contributed litters)	⨽ 14 litters, 170 pups

All rat records	590 rats
⨽ females	⨽ 303 females (51.4 %)
⨽ males	⨽ 287 males (48.6 %)

Litter statistics

Average mother age	231 days (7.6 months)
Average father age	520 days (17.1 months)
Average litter size	11.2 pups per litter
Average sex ratio	0.947 (about 1 female for 1 male)

Lifespan statistics

Bred rats recorded as deceased	313 rats (72.3 % of recorded bred rats)
⨽ declared with known date	⨽ 306 rats (97.8 %)
⨽ presumed dead	⨽ 7 rats (2.2 %)

Average lifespan of bred rats	22.4 months (♀: 24.2 months – ♂: 20.4 months)
⨽ infant mortality excluded	⨽ 24.7 months (♀: 26.3 months – ♂: 22.8 months)
⨽ accidents excluded	⨽ 25.5 months (♀: 27.1 months – ♂: 23.6 months)

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

Death causes statistics

Primary death causes by decreasing frequency

22.22 %	Respiratory
17.65 %	Other
9.8 %	Unknown cause
9.8 %	Old age, natural death (from 24 month old minimum)
9.15 %	Infant mortality (up to 6 week old)
7.19 %	Accidents, traumas, poisonings
6.86 %	Neurological (brain, spinal cords, nerves)
4.9 %	Digestive
4.25 %	Eye, ear, mouth, face
3.59 %	Cardiovascular
2.94 %	Reproductive system
0.98 %	Urinary system (kidney, bladder)
0.65 %	Skin

Secondary death causes by decreasing frequency

13.4 %	Undetermined tumor (affected organ unknown)
9.8 %	Undetermined cause (known date)
9.8 %	Bronchitis, pneumonia
9.8 %	*Old age, natural death (from 24 month old minimum)
8.17 %	*Respiratory
4.9 %	*Infant mortality (up to 6 week old)
4.25 %	Stillborn
3.27 %	Lung tumor
2.94 %	*Neurological (brain, spinal cords, nerves)
2.61 %	Domestic accident (crush, door...)
2.29 %	Veterinary accident (anesthesia during a minor operation, medical error, etc.)
2.29 %	*Other
1.96 %	Heart failure, valvular disease
1.63 %	Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
1.63 %	Facial tumor (excluding Zymbal tumor)
1.63 %	Pituitary tumor
1.63 %	Zymbal gland tumor
1.63 %	Digestive tumor (stomach, liver, pancreas, intestines...)
1.31 %	Other heart or vascular problem
1.31 %	Stroke
1.31 %	Mammary tumor
0.98 %	Undetermined infection or abscess
0.98 %	Other digestive trouble
0.65 %	Uterine tumor
0.65 %	Epilepsy
0.65 %	Complications of gestation or parturition
0.65 %	Intestinal obstruction (excluding megacolon)
0.65 %	Tooth abscess
0.65 %	Digestive abscess
0.65 %	Other respiratory trouble
0.33 %	Liver failure
0.33 %	Digestive hemorrhage
0.33 %	Euthanasia without medical cause
0.33 %	Bladder tumor
0.33 %	Subcutaneous abscess
0.33 %	Sepsis
0.33 %	Other reproductive system disorder
0.33 %	Kidney tumor
0.33 %	Skin tumor, skin cancer
0.33 %	Hereditary megacolon
0.33 %	Pulmonary edema
0.33 %	Heart attack, infarct, pulmonary embolism
0.33 %	Falls, fractures, head or spinal cord trauma (excluding fights)
0.33 %	Brain tumor
0.33 %	Food poisoning
0.33 %	Renal failure
0.33 %	Generalized cancer, leukemia, lymphoma
0.33 %	*Eye, ear, mouth, face

Related entries

Last contributed litters

See all

State	Birth date	Dam	Sire	Size	Actions
✗	13/05/2026	OPR Narya	DEL Silco	11
✓	21/04/2026	OPR Vilya	DEL Oz	11
✓	12/10/2025	PRH-LVM Tianhe la Rivière Céleste	DEL Infinity	15
✓	07/08/2025	DEL Kendra	DEL Tricatel	12
✓	27/07/2025	DEL Tanya	MIL-DEL Gurney Halleck	14
✓	10/07/2025	DEL Sevika	DEL Nicodemus	14
✓	01/07/2025	DEL-RMJ Mystère	DEL Infinity	12
✓	06/05/2025	OPR-DEL Honeydukes	DEL Lo'ak	5
✓	29/12/2024	MIL-DEL Shadout Mapes	NAM-CPK Spirit	10
✓	19/12/2024	MIL-DEL Irulan Corrino	OPR Vlad	11

Recently modified rats

See all

State	Identifier	Prefix	Name	Pup Name	Birth	Age	Death cause	Sex	Actions
✗	DEL61296M	DEL	Oz	Oz	19/12/2024	17 mo	– alive –	♂
✓	DEL59471M	DEL	Näzik  †	Mr Ages	31/10/2023	26 mo	Facial tumor	♂
✓	DEL59339F	DEL	Mrs Brisby †		31/10/2023	25 mo	Undetermined cause	♀
✓	DEL61962M	DEL	Volt	Last Day of Summer	10/07/2025	10 mo	– alive –	♂
✓	DEL57577M	DEL-LVM	Tortuga †	Tricéraptor	11/10/2022	25 mo	Undetermined cause	♂
✓	DEL61977M	DEL	Newton	Marcel	27/07/2025	10 mo	– alive –	♂
✓	DEL58864F	DEL	Radioactive †		28/09/2023	26 mo	Stroke	♀
✓	DEL58379M	DEL	Lo'ak †		30/04/2023	26 mo	Lung tumor	♂
✓	DEL58376F	DEL	Tsireya †		30/04/2023	30 mo	Zymbal gland tumor	♀
✓	DEL58377F	DEL	Fuji †	Kiri	30/04/2023	27 mo	Undetermined cause	♀