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	598 rats
⨽ females	⨽ 307 females (51.3 %)
⨽ males	⨽ 291 males (48.7 %)

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	0.948 (about 1 female for 1 male)

Lifespan statistics

Bred rats recorded as deceased	322 rats (74.4 % of recorded bred rats)
⨽ declared with known date	⨽ 315 rats (97.8 %)
⨽ presumed dead	⨽ 7 rats (2.2 %)

Average lifespan of bred rats	22.6 months (♀: 24.3 months – ♂: 20.7 months)
⨽ infant mortality excluded	⨽ 24.8 months (♀: 26.4 months – ♂: 23 months)
⨽ accidents excluded	⨽ 25.6 months (♀: 27.1 months – ♂: 23.8 months)

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

Death causes statistics

Primary death causes by decreasing frequency

21.59 %	Respiratory
17.14 %	Other
10.48 %	Old age, natural death (from 24 month old minimum)
9.84 %	Unknown cause
8.89 %	Infant mortality (up to 6 week old)
7.3 %	Neurological (brain, spinal cords, nerves)
6.98 %	Accidents, traumas, poisonings
5.08 %	Eye, ear, mouth, face
4.76 %	Digestive
3.49 %	Cardiovascular
2.86 %	Reproductive system
0.95 %	Urinary system (kidney, bladder)
0.63 %	Skin

Secondary death causes by decreasing frequency

13.02 %	Undetermined tumor (affected organ unknown)
10.48 %	*Old age, natural death (from 24 month old minimum)
9.84 %	Undetermined cause (known date)
9.52 %	Bronchitis, pneumonia
7.94 %	*Respiratory
4.76 %	*Infant mortality (up to 6 week old)
4.13 %	Stillborn
3.49 %	*Neurological (brain, spinal cords, nerves)
3.17 %	Lung tumor
2.54 %	Domestic accident (crush, door...)
2.22 %	Zymbal gland tumor
2.22 %	Veterinary accident (anesthesia during a minor operation, medical error, etc.)
2.22 %	*Other
1.9 %	Heart failure, valvular disease
1.59 %	Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
1.59 %	Facial tumor (excluding Zymbal tumor)
1.59 %	Pituitary tumor
1.59 %	Digestive tumor (stomach, liver, pancreas, intestines...)
1.27 %	Other heart or vascular problem
1.27 %	Stroke
1.27 %	Mammary tumor
0.95 %	Other digestive trouble
0.95 %	Tooth abscess
0.95 %	Undetermined infection or abscess
0.63 %	Intestinal obstruction (excluding megacolon)
0.63 %	Digestive abscess
0.63 %	Other respiratory trouble
0.63 %	Uterine tumor
0.63 %	Epilepsy
0.63 %	Complications of gestation or parturition
0.32 %	Falls, fractures, head or spinal cord trauma (excluding fights)
0.32 %	Brain tumor
0.32 %	Food poisoning
0.32 %	Renal failure
0.32 %	Generalized cancer, leukemia, lymphoma
0.32 %	Liver failure
0.32 %	Digestive hemorrhage
0.32 %	Euthanasia without medical cause
0.32 %	Bladder tumor
0.32 %	Subcutaneous abscess
0.32 %	Sepsis
0.32 %	Other reproductive system disorder
0.32 %	Kidney tumor
0.32 %	Skin tumor, skin cancer
0.32 %	Hereditary megacolon
0.32 %	Pulmonary edema
0.32 %	Heart attack, infarct, pulmonary embolism
0.32 %	*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
✗	DEL58384M	DEL	Rassassin †	Neteyam	30/04/2023	37 mo	Retro-orbital tumor	♂
✓	DEL59460F	DEL	Kira †	The Sentry Reel	31/10/2023	31 mo	Zymbal gland tumor	♀
✓	DEL59468M	DEL	Nicodemus †		31/10/2023	31 mo	Old age, natural death	♂
✓	DEL59470M	DEL	Sullivan †		31/10/2023	31 mo	Zymbal gland tumor	♂
✓	DEL59466F	DEL	The Secret of MIMH †		31/10/2023	30 mo	Neurological	♀
✓	DEL61349M	DEL-RMJ	Boomerang †		29/12/2024	15 mo	Undetermined cause	♂
✓	DEL58865M	DEL	Oppenheimer †		28/09/2023	21 mo	Bronchitis, pneumonia	♂
✓	DEL60253M	DEL	Tricatel †	Tricatel	26/05/2024	24 mo	Tooth abscess	♂
✓	DEL60257M	DEL	Orphée  †	Nikos de Mikonos	26/05/2024	20 mo	Neurological	♂
✓	DEL58866M	DEL	Infinity †		28/09/2023	31 mo	Old age, natural death	♂