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Paternal care

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Title: Paternal care  
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Subject: Challenge hypothesis, Parenting, Bird, Platydesmida, Bateman's principle
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Paternal care

In biology, paternal care is parental investment provided by a male animal to his own offspring. Paternal care may provided in concert with the mother (biparental care) or, more rarely, by the male alone (so called exclusive paternal care).

The provision of care, by either males or females, is presumed to increase growth rates, quality, and/or survival of young, and hence ultimately increase the

  • BBC Nature wildlife videos
  • "Paternal Care" page at the Center for Academic Research and Training in Anthropogeny
  • Thanks Dad!
  • The Evolving Father by Peter B. Gray and Kermyt G. Anderson

External links

  • Gray, P. B., & Anderson, K. G. 2010. Fatherhood: Evolution and human paternal behavior. Cambridge, MA: Harvard University Press.
  • Gray, P. B., & Garcia, J. R. 2013. Evolution and human sexual behavior. Cambridge, MA: Harvard University Press.
  • Malinowski, B. 1938. The sexual life of savages. Boston: Beacon Press.
  • Muller, M. N., & Emery Thompson, M. 2012. Mating, parenting, and male reproductive strategies. In. J. C. Mitani, J. Call, P. M. Kappeler, R. A. Palombi, & J. B. Silk (Eds.), The evolution of primate societies (pp. 387–411). Chicago: The University of Chicago Press.
  • Salgado, M. 2013. The Evolution of Paternal Care. Pages 1–10 in A.M. Greenberg, W.G. Kennedy, and N.D. Bos (Eds.): SBP 2013, LNCS 7812. Springer-Verlag: Berlin, Heidelberg.
  • Smuts, B. B., & Gubernick, D. J. 1992. Male-infant relationships in nonhuman primates: Paternal investment or mating effort? In B. S. Hewlett (Ed.), Father-child relations: Cultural and biosocial contexts, (pp. 1–30). New York: Aldine.

Further reading

  1. ^ Lack, L. 1968. Ecological Adaptations for Breeding in Birds. Methuen, London.
  2. ^ Trivers, R. L. 1972. Parental investment and sexual selection. Pages 136-179 in Campbell, B., Ed., Sexual selection and the descent of Man 1871–1971. Aldine Pub, Chicago.
  3. ^
  4. ^ a b
  5. ^ Kleiman, D. G., & Malcolm, J. R., 1981. The evolution of male parental investment in mammals. Pages 347-387 in D. J. Gubernick and P. H. Klopfer, Eds., Parental care in mammals. Plenum Press, New York.
  6. ^ Clutton-Brock, T. H. 1991. The evolution of parental care. Princeton, New Jersey: Princeton University Press.
  7. ^
  8. ^ a b
  9. ^ Kleiman DG, Malcolm JR. 1981. The evolution of male parental investment in mammals. Pp 347-387 in Parental Care in Mammals, Gubernick DJ, Klopfer PH, eds. Plenum Press, New York.
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  18. ^ Accessed 17 December 2013
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  20. ^ Trainor, B. C., Pride, M. C., Villalon Landeros, R., Knoblauch, N. W., Takahashi, E. Y., Silva, A. L. & Crean, K. K. 2011. Sex differences in social interaction behavior following social defeat stress in the monogamous California mouse. PLoS One, e17405.
  21. ^
  22. ^ Kunz, T.H. & W.R. Hood. 2000. Parental care and postnatal growth in the Chiroptera. pp 416-510 in Reproductive Biology of Bats; E. G. Chrichton, & P. H. Krutzsch, Eds. Academic Press
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  25. ^ Wong, J. W. Y., J. Meunier & M. Kolliker. 2013. The evolution of parental care in insects: the roles of ecology, life history and the social environment.
  26. ^ Smith, R.L. 1997. Evolution of paternal care in the giant water bugs (Heteroptera: Belostomatidae). Pages 116–149 in The Evolution of Social Behavior in Insects and Arachnids (ed. by J. C. Choe and B. J. Crespi). Cambridge University Press, Cambridge, U.K.
  27. ^
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  29. ^ Duffy, S. E. 2010. Crustacean social evolution, in: Encyclopedia of Animal Behavior. Elsevier, pp. 421–429.
  30. ^
  31. ^ Salgado, M. 2013. The Evolution of Paternal Care. Pages 1-10 in A.M. Greenberg, W.G. Kennedy, and N.D. Bos (Eds.): SBP 2013, LNCS 7812. Springer-Verlag: Berlin, Heidelberg.
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  35. ^ Polito, Michael J., and Wayne Z. Trivelpiece. "Transition to Independence and Evidence of Extended Parental Care in the Gentoo Penguin (Pygoscelis Papua)." Marine Biology (2008): n. pag. WorldCat@OSU. Web. Sept. 2014.
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  38. ^ Numan, M., & Insel, T. R. 2003. The Neurobiology of Parental Behavior. Springer, New York.
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See also

Placentophagia (the behavior of ingesting the afterbirth after parturition) has been proposed to have physiological consequences that could facilitate a male’s responsiveness to offspring[41][42][43][44] Non-genomic transmission of paternal behavior from fathers to their sons has been reported to occur in laboratory studies of the biparental California mouse, but whether this involves (epigenetic) modifications or other mechanisms is not yet known.[45]

Paternal males do not undergo these same hormonal changes and so the proximate causes of the onset of parental behaviors must differ from those in females. There is little consensus regarding the processes by which mammalian males begin to express parental behaviors.[39] In humans, evidence ties oxytocin to sensitive care-giving in both women and men, and with affectionate infant contact in women and stimulatory infant contact in men. In contrast, testosterone decreases in men who become involved fathers and testosterone may interfere with aspects of paternal care.[40]

The mechanisms that underlie the onset of parental behaviors in female mammals have been characterized in a variety of species. In mammals, females undergo endocrine changes during gestation and lactation that "prime" mothers to respond maternally towards their offspring.[37][38]

The hormonal control, vasopressin apparently underlies the neurochemical basis of paternal care; prolactin and testosterone may also be involved. As with other behaviors that affect Darwinian fitness, reward pathways[36] in the brain may reinforce the expression of paternal care and may be involved in the formation of attachment bonds.

Proximate mechanisms of paternal care

Care by fathers can have important consequences for survival and development of offspring in both humans[34] and other species. A study discovered an extended duration of paternal care in the gentoo penguin, when compared to other Pygoscelis species. It was found that their fledging period, the time between a chick’s first trip to sea and its absolute independence from the group, was longer than other penguins of the same genus. They hypothesized that this was because it allowed chicks to better develop their foraging skills before becoming completely independent from their parents. By doing so, a chick may have a higher chance of survival and increase the population’s overall fitness.[35]

Consequences of paternal care for offspring survival and development

Other models suggest that basic life-history differences between males and females are adequate to explain the evolutionary origins of maternal, paternal, and bi-parental care. Specifically, paternal care is more likely if male adult mortality is high, and maternal care is more likely to evolve if female adult mortality is high.[32] Basic life-history differences between the sexes can also cause evolutionary transitions among different sex-specific patterns of parental care.[33]

Mathematical models related to the Prisoner's Dilemma suggest that when female reproductive costs are higher than male reproductive costs, males cooperate with females even when they do not reciprocate. In this view, paternal care is an evolutionary achievement that compensates for the higher energy demands that reproduction typically involves for mothers.[31]

Theoretical models of the evolution of paternal care

Paternal care is rare in arthropods,[25] but occurs in some species, including the giant water bug[26][27] and the arachnid Iporangaia pustulosa, a harvestman.[28] In several species of crustaceans, males provide care of offspring by building and defending burrows or other nest sites.[29] Exclusive paternal care, where males provide the sole investment after egg-laying, is the rarest form, and is known in only 13 taxa: giant water bugs, sea spiders, two genera of leaf-footed bugs, two genera of assassin bugs, three genera of phlaeothripid thrips, three genera of harvestmen, and in millipedes of the family Andrognathidae.[30]


During the breeding season, male three-spined sticklebacks defend nesting territories. Males attract females to spawn in their nests and defend their breeding territory from intruders and predators. After spawning, the female leaves the male’s territory and the male is solely responsible for the care of the eggs. During the ~6-day incubation period, the male ‘fans’ (oxygenates) the eggs, removes rotten eggs and debris, and defends the territory. Even after embryos hatch, father sticklebacks continue to tend their newly-hatched offspring for ~7 days, chasing and retrieving fry that stray from the nest and spiting them back into the nest.[24]

In jawfish, the female lays the eggs and the male then takes them in his mouth. A male can have up to 400 eggs in his mouth at one time. The male can't feed while he hosts the young, but as the young get older, they spend more time out of the mouth.[23]

Paternal care occurs in perhaps as many as half of the known species of certain families of teleost fish. One well-known example of paternal care is in seahorses, where males brood the eggs in a brood pouch until they are ready to hatch.



Fathers contribute to the care of offspring in as many as 90% of bird species, sometimes including incubating the eggs. Most paternal care is associated with biparental care in socially monogamous mating systems (about 81% of species), but in approximately 1% of species, fathers provide all care after eggs are laid.[4] The unusually high incidence of paternal care in birds compared to other vertebrate taxa is often assumed to stem from the extensive resource requirements for production of flight-capable offspring. By contrast, in bats (the other extant flying vertebrate lineage), care of offspring is provided by females (although males may help guard pups in some species[22]). In contrast to the large clutch sizes found in many bird species with biparental care, bats typically produce single offspring, which may be a limitation related to lack of male help. It has been suggested, though not without controversy, that paternal care is the ancestral form of parental care in birds.[8]


[21][20] Several species of rodents have been studied as models of paternal care, including

California mice (Peromyscus californicus) are well known for have intensive and sustained paternal behavior.


Paternal care is rare in non-human primates.[19]

Non-human primates

According to the United States Census Bureau, approximately one third of children in the U.S. grow up without their biological father in their home. Numerous studies have documented negative consequences of being raised in a home that lacks a father, including increased likelihood of living in poverty, having behavioral problems, committing crimes, spending time in prison, abusing drugs or alcohol, becoming obese, and dropping out of school.[18]

Research on the effects of paternal care on human happiness have yielded conflicting results. However, one recent study concluded that fathers generally report higher levels of happiness, positive emotion, and meaning in life as compared with non-fathers.[17]

Human cultures and societies vary widely in the expression of paternal care. Some cultures recognize paternal care via celebration of Father's Day. According to CARTA [1], human paternal care is a derived characteristic (evolved in humans or our recent ancestors) and one of the defining characteristics of Homo sapiens. Different aspects of human paternal care (direct, indirect, fostering social or moral development) may have evolved at different points in our history, and together they form a unique suite of behaviors as compared with the great apes. One study of humans has found evidence suggesting a possible evolutionary trade-off between mating success and parenting involvement; specifically, fathers with smaller testes tend to be more involved in care of their children.[16]


In mammals, paternal care is found most commonly in primates, rodents and canids.

have not been investigated directly in mammals. parental investment Nonetheless, the energetic and performance consequences of male [15][14] Male mammals may invest heavily in reproduction through efforts to enhance



  • Mammals 1
    • Humans 1.1
    • Non-human primates 1.2
    • Rodents 1.3
  • Birds 2
  • Fish 3
  • Arthropods 4
  • Theoretical models of the evolution of paternal care 5
  • Consequences of paternal care for offspring survival and development 6
  • Proximate mechanisms of paternal care 7
  • See also 8
  • References 9
  • Further reading 10
  • External links 11


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