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Difference between revisions of "Breeding"

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(Categories, bugs, spacing, some rewording.)
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'''{{catlink|Breeding}}''' creatures are those which can produce offspring in fortress mode. Conversely, '''{{catlink|Non-Breeding|non-breeding}}''' creatures cannot reproduce in fortress mode, even though they presumably do so during worldgen. Breeding creatures are significantly more useful as stock for a [[meat industry]] than their non-breeding counterparts.
 
'''{{catlink|Breeding}}''' creatures are those which can produce offspring in fortress mode. Conversely, '''{{catlink|Non-Breeding|non-breeding}}''' creatures cannot reproduce in fortress mode, even though they presumably do so during worldgen. Breeding creatures are significantly more useful as stock for a [[meat industry]] than their non-breeding counterparts.
 
</onlyinclude>
 
</onlyinclude>
To be able to breed, a creature must have separate {{token|MALE|c}} and {{token|FEMALE|c}} castes. Genderless and one-gendered creatures are incapable of breeding. Toady stated that he "removed requirement that a creature have a baby/child state to breed completely" in version 0.40.06{{cite devlog|2014|07|29}}.
 
  
When a compatible male and a female of the same species are present on the map, sooner or later they will breed. To do so, they will need to be situated on adjacent tiles. Breeding can be prevented by [[gelding]] males, separating males and females, caging females, or while (non-aquatic?) creatures are [[swimming]]. Caged males are still capable of breeding, assuming the female can approach the cage.
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==Breeding Mechanics==
 +
To be able to breed, a creature must have separate {{token|MALE|c}} and {{token|FEMALE|c}} castes. Genderless and one-gendered creatures are incapable of breeding.
  
[[Invader]]s normally are incapable of breeding, but they have been observed to arrive on the map pregnant. Additionally, invaders (whether soldiers or mounts) can become pregnant and breed while on the map if they possess the {{token|PET|c}} or {{token|PET_EXOTIC|c}} tokens (and a {{token|PET_VALUE|c}}), but their parents will immediately attack their offspring unless they are separated from each other (such as via [[Trap#Cage_Trap|cage traps]]).
+
When a compatible male and an uncaged female of the same species are on adjacent tiles, they'll breed when idle.
 +
 
 +
===Prevention===
 +
Breeding can be prevented by [[gelding]] males, separating males and females, caging females, or while (non-aquatic?) creatures are [[swimming]]. Caged males are still capable of breeding, assuming the female can approach the cage. Pregnant non-egglaying females can give birth in cages, but not get pregnant again
 +
 
 +
===Limits on breeding===
  
There is a per-creature-type population cap, observed to be around 50, past which breeding animals will not get pregnant; existing pregnancies will mature to term. Furthermore, animals will not reproduce if children make up more than 75% of their population - for creatures which take longer than a year to grow up (such as elephants, which take 10 years), this can slow breeding significantly. Once the population drops below these caps, the creatures will begin breeding again.
+
Excluding your fortress citizens, there is a per-creature-type population cap of 50, past which breeding animals will not get pregnant; existing pregnancies will mature to term. Furthermore, animals will not reproduce if children make up more than 75% of their population - for creatures which take longer than a year to grow up (such as elephants, which take 10 years), this can slow breeding significantly. Once the population drops below these caps, the creatures will begin breeding again.
  
All animals have a gestation period of 6 months (Dwarves are 9 months), but there are several factors that can prevent them from breeding:
+
All non-sentient animals have a gestation period of 6 months (Dwarves are 9 months), but there are several factors that can prevent them from breeding:
  
 
1. Too many adults - if you have more than 50 per species, they will stop breeding.
 
1. Too many adults - if you have more than 50 per species, they will stop breeding.
 +
 
2. Too many children - if more than 75% of that animal's population is juvenile, they will stop breeding until the young ones grow up.
 
2. Too many children - if more than 75% of that animal's population is juvenile, they will stop breeding until the young ones grow up.
3. They're gay - the animals in your "breeding pairs" are homosexual or otherwise uninterested in reproducing, which is the case for 25% of all animals.  
+
 
 +
3. They're not interested - the animals in your "breeding pairs" are homosexual or otherwise uninterested in reproducing, which is the case for 5% of all animals.
 +
 
 +
==Off-map breeding==
 +
[[Invader]]s normally are incapable of breeding, but they have been observed to arrive on the map pregnant. Additionally, invaders (whether soldiers or mounts) can become pregnant and breed while on the map if they possess the {{token|PET|c}} or {{token|PET_EXOTIC|c}} tokens (and a {{token|PET_VALUE|c}}), but their parents will immediately attack their offspring unless they are separated from each other (such as via [[Trap#Cage_Trap|cage traps]]).
 +
 
 +
As non-historical sentient figures cannot breed, visitors are more often able to breed than invaders, though this is countered by their relatively common separation from loved ones by distance or death.
 +
 
 +
==Bugs==
 +
* Game crashes when werecreatures give birth to male offspring {{bug|11549}}
 +
* It is intended for attributes to be inheritable <sup>[https://www.bay12games.com/media/df_talk_8_transcript.html DF Talk #8 (2010)]</sup>, but [http://www.bay12forums.com/smf/index.php?topic=176850.msg8164148#msg8164148 latest testing] suggests there is minimal impact on either strength or body size.
  
 
{{Category|Creature attributes}}
 
{{Category|Creature attributes}}
 
[[ru:Breeding]]
 
[[ru:Breeding]]

Revision as of 21:57, 16 September 2020

This article is about the current version of DF.
Note that some content may still need to be updated.

Breeding creatures are those which can produce offspring in fortress mode. Conversely, non-breeding creatures cannot reproduce in fortress mode, even though they presumably do so during worldgen. Breeding creatures are significantly more useful as stock for a meat industry than their non-breeding counterparts.


Breeding Mechanics

To be able to breed, a creature must have separate [MALE] and [FEMALE] castes. Genderless and one-gendered creatures are incapable of breeding.

When a compatible male and an uncaged female of the same species are on adjacent tiles, they'll breed when idle.

Prevention

Breeding can be prevented by gelding males, separating males and females, caging females, or while (non-aquatic?) creatures are swimming. Caged males are still capable of breeding, assuming the female can approach the cage. Pregnant non-egglaying females can give birth in cages, but not get pregnant again

Limits on breeding

Excluding your fortress citizens, there is a per-creature-type population cap of 50, past which breeding animals will not get pregnant; existing pregnancies will mature to term. Furthermore, animals will not reproduce if children make up more than 75% of their population - for creatures which take longer than a year to grow up (such as elephants, which take 10 years), this can slow breeding significantly. Once the population drops below these caps, the creatures will begin breeding again.

All non-sentient animals have a gestation period of 6 months (Dwarves are 9 months), but there are several factors that can prevent them from breeding:

1. Too many adults - if you have more than 50 per species, they will stop breeding.

2. Too many children - if more than 75% of that animal's population is juvenile, they will stop breeding until the young ones grow up.

3. They're not interested - the animals in your "breeding pairs" are homosexual or otherwise uninterested in reproducing, which is the case for 5% of all animals.

Off-map breeding

Invaders normally are incapable of breeding, but they have been observed to arrive on the map pregnant. Additionally, invaders (whether soldiers or mounts) can become pregnant and breed while on the map if they possess the [PET] or [PET_EXOTIC] tokens (and a [PET_VALUE]), but their parents will immediately attack their offspring unless they are separated from each other (such as via cage traps).

As non-historical sentient figures cannot breed, visitors are more often able to breed than invaders, though this is countered by their relatively common separation from loved ones by distance or death.

Bugs

  • Game crashes when werecreatures give birth to male offspring Bug:11549
  • It is intended for attributes to be inheritable DF Talk #8 (2010), but latest testing suggests there is minimal impact on either strength or body size.