DEL – D’ Ombre et de Lumière 

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Statistics

Breeding statistics

Breeding activity period	2016–2024 (8 years)

Declared litters	43 litters, 481 pups
⨽ internal (born in the rattery)	⨽ 31 litters, 337 pups
⨽ external (other contributed litters)	⨽ 12 litters, 144 pups

All rat records	479 rats
⨽ females	⨽ 249 females (52 %)
⨽ males	⨽ 230 males (48 %)

Litter statistics

Average mother age	231 days (7.6 months)
Average father age	501 days (16.4 months)
Average litter size	11.2 pups per litter
Average sex ratio	0.924 (about 13 females for 12 males)

Lifespan statistics

Bred rats recorded as deceased	255 rats (75.9 % of recorded bred rats)
⨽ declared with known date	⨽ 248 rats (97.3 %)
⨽ presumed dead	⨽ 7 rats (2.7 %)

Average lifespan of bred rats	23.2 months (♀: 25.5 months – ♂: 20.6 months)
⨽ infant mortality excluded	⨽ 24.5 months (♀: 26.7 months – ♂: 21.9 months)
⨽ accidents excluded	⨽ 25.5 months (♀: 27.5 months – ♂: 23 months)

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

Death causes statistics

Primary death causes by decreasing frequency

25 %	Respiratory
20.97 %	Other
9.27 %	Old age, natural death (from 24 month old minimum)
8.87 %	Unknown cause
7.66 %	Accidents, traumas, poisonings
6.85 %	Neurological (brain, spinal cords, nerves)
5.24 %	Infant mortality (up to 6 week old)
4.84 %	Digestive
3.63 %	Cardiovascular
2.82 %	Eye, ear, mouth, face
2.82 %	Reproductive system
1.21 %	Urinary system (kidney, bladder)
0.81 %	Skin

Secondary death causes by decreasing frequency

16.53 %	Undetermined tumor (affected organ unknown)
10.48 %	Bronchitis, pneumonia
9.68 %	*Respiratory
9.27 %	*Old age, natural death (from 24 month old minimum)
8.87 %	Undetermined cause (known date)
5.24 %	*Infant mortality (up to 6 week old)
3.63 %	Lung tumor
3.63 %	*Neurological (brain, spinal cords, nerves)
2.82 %	Veterinary accident (anesthesia during a minor operation, medical error, etc.)
2.82 %	*Other
2.42 %	Domestic accident (crush, door...)
2.02 %	Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
2.02 %	Digestive tumor (stomach, liver, pancreas, intestines...)
2.02 %	Heart failure, valvular disease
1.61 %	Pituitary tumor
1.21 %	Zymbal gland tumor
1.21 %	Other heart or vascular problem
1.21 %	Undetermined infection or abscess
0.81 %	Intestinal obstruction (excluding megacolon)
0.81 %	Other digestive trouble
0.81 %	Facial tumor (excluding Zymbal tumor)
0.81 %	Other respiratory trouble
0.81 %	Uterine tumor
0.81 %	Stroke
0.81 %	Epilepsy
0.81 %	Complications of gestation or parturition
0.81 %	Mammary tumor
0.4 %	Tooth abscess
0.4 %	Food poisoning
0.4 %	Renal failure
0.4 %	Liver failure
0.4 %	Digestive hemorrhage
0.4 %	Euthanasia without medical cause
0.4 %	Bladder tumor
0.4 %	Subcutaneous abscess
0.4 %	Kidney tumor
0.4 %	Other reproductive system disorder
0.4 %	Pulmonary edema
0.4 %	Skin tumor, skin cancer
0.4 %	Hereditary megacolon
0.4 %	Heart attack, infarct, pulmonary embolism
0.4 %	*Eye, ear, mouth, face

Related entries

Last contributed litters

See all

State	Birth date	Dam	Sire	Size	Actions
✓	19/11/2024	DEL Pamela Rose	HDL-FAE Shadow Moon	16
✓	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

Recently modified rats

See all

State	Identifier	Prefix	Name	Pup Name	Birth	Age	Death cause	Sex	Actions
✓	DEL56602M	DEL-DNR	Angus †	Chant Funeste	19/01/2022	37 mo	Bladder tumor	♂
✓	DEL58079M	DEL	Mimosa †	A Midsummer Night's Dream	04/03/2023	23 mo	Digestive tumor	♂
✓	DEL56603M	DEL-DNR	Meeko †	Gronk	19/01/2022	22 mo	Other heart or vascular problem	♂
✓	DEL61072F	DEL	Nika		19/11/2024	4 mo	– alive –	♀
✓	DEL61070F	DEL	Tanya		19/11/2024	4 mo	– alive –	♀
✓	DEL61071F	DEL	Zhanna		19/11/2024	4 mo	– alive –	♀
✓	DEL61073F	DEL	Zorka		19/11/2024	4 mo	– alive –	♀
✓	DEL61074M	DEL	Potemkine		19/11/2024	4 mo	– alive –	♂
✓	DEL61075M	DEL	Neptune	Dersu	19/11/2024	4 mo	– alive –	♂
✓	DEL61076M	DEL	Apollon	Vertov	19/11/2024	4 mo	– alive –	♂