Parental division of labour and the shift from minimal to maximal role specializations: an examination using a biparental fish

Itzkowitz, Murray; Santangelo, Nicholas; Richter, Martin L.

doi:10.1006/anbe.2000.1724

Cited by 78 publications

(90 citation statements)

References 24 publications

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“…It now would be valuable to test whether males and females in these species differ with respect to genetic correlations between different parental behaviors and whether these differences match any behavioral specializations in parental care. Many species, including birds, fishes, and other insects, show flexibility and variation in the sex that cares (3,30). These species provide taxonomically diverse candidates in which to examine how male and female parental roles are influenced by the genetic architecture underlying parental care.…”

Section: Genetic and Phenotypic Correlations Within And Between The Smentioning

confidence: 99%

“…Nevertheless, it represents one of the main areas of research in behavioral ecology (1). Within the animal kingdom there is variation in the sex that provides care (2), but even when both parents provide care, males and females tend to specialize, often with a clear division of labor between the sexes (1,3,4). Specialization is possible because parental care typically involves several behaviors, such as incubation of eggs, defense of young, nest construction and maintenance, and provisioning of food to developing offspring (1).…”

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confidence: 99%

“…However, in a number of species, both sexes will display the full range of parental behaviors following the loss of the partner (i.e., when the other sex dies or is removed) (3,6). These systems provide an opportunity for quantifying the genetic variation underlying parental care behaviors in both sexes and assess whether or not this variation differs.…”

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confidence: 99%

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The quantitative genetics of sex differences in parenting

Walling

Stamper

Smiseth

et al. 2008

Proc. Natl. Acad. Sci. U.S.A.

137

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Sex differences in parenting are common in species where both males and females provide care. Although there is a considerable body of game and optimality theory for why the sexes should differ in parental care, genetics can also play a role, and no study has examined how genetic influences might influence differences in parenting. We investigated the extent that genetic variation influenced differences in parenting, whether the evolution of differences could be constrained by shared genetic influences, and how sex-specific patterns of genetic variation underlying parental care might dictate which behaviors are free to evolve in the burying beetle Nicrophorus vespilloides. Females provided more direct care than males but did not differ in levels of indirect care or the number of offspring they were willing to rear. We found low to moderate levels of heritability and evolvability for all 3 parenting traits in both sexes. Intralocus sexual conflict was indicated by moderately strong intersex genetic correlations, but these were not so strong as to represent an absolute constraint to the evolution of sexual dimorphism in care behavior. Instead, the pattern of genetic correlations between parental behaviors showed sexspecific tradeoffs. Thus, differences in the genetic correlations between parental traits within a sex create sex-specific lines of least evolutionary resistance, which in turn produce the specific patterns of sex differences in parental care. Our results therefore suggest a mechanism for the evolution of behavioral specialization during biparental care if uniparental and biparental care behaviors share the same genetic influences.behavior genetics ͉ genetic architecture ͉ lines of least evolutionary resistance ͉ parental care ͉ sexual dimorphism

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Section: Genetic and Phenotypic Correlations Within And Between The Smentioning

confidence: 99%

mentioning

confidence: 99%

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The quantitative genetics of sex differences in parenting

Walling

Stamper

Smiseth

et al. 2008

Proc. Natl. Acad. Sci. U.S.A.

137

View full text Add to dashboard Cite

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“…For a wide range of biparental species that exhibit sex-specific behaviors, it is common to find males engaged in territorial defense while females are involved in more direct care of offspring [e.g. birds (Burger, 1981;Creelman and Storey, 1991;Fraser et al, 2002); and fish (Keenleyside and Bietz, 1981;Lavery and Reebs, 1994;Wisenden, et al, 1995;Itzkowitz et al, 2001;Itzkowitz et al, 2003;Itzkowitz et al, 2005)]. …”

Section: Introductionmentioning

confidence: 99%

Comparative gene expression profiles for highly similar aggressive phenotypes in male and female cichlid fishes (Julidochromis)

Schumer

Krishnakant

Renn

2011

Journal of Experimental Biology

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SUMMARYJulidochromis marlieri and Julidochromis transcriptus are two closely related Tanganyikan cichlids that have evolved different behavior and mating strategies since they diverged from their common ancestor. While J. transcriptus follows the ancestral pattern of male dominance, male-biased sexual size dimorphism and territoriality, the pattern is reversed in J. marlieri. In J. marlieri, females show all of these behavioral and morphological characteristics. This raises the question of whether female J. marlieri achieve the dominant phenotype by expressing the same genes as J. transcriptus males or whether novel brain gene expression patterns have evolved to produce a similar behavioral phenotype in the females of J. marlieri. This study used cDNA microarrays to investigate whether female J. marlieri and male J. transcriptus show conserved or divergent patterns of brain gene expression. Analysis of microarray data in both species showed certain gene expression patterns associated with sex role independent of gonadal sex and, to a lesser extent, gene expression patterns associated with sex independent of sex role. In general, these data suggest that while there has been substantial divergence in gene expression patterns between J. transcriptus and J. marlieri, we can detect a highly significant overlap for a core set of genes related to aggression in both species. These results suggest that the proximate mechanisms regulating aggressive behavior in J. transcriptus and J. marlieri may be shared. Supplementary material available online at

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“…In this sense, when a caregiver alters its level of care, due to behavioural adjustments or offspring abandonment, its mate may adaptively respond by changing its own parental behaviour. For instance, a decrease in parental effort by one caregiver may be compensated by its mate increasing care according to its own interests, a pattern predicted by theoretical models (e.g., Winkler 1987;Houston & Davies 1985;McNamara et al 2003;Johnstone 2011) and widely reported by empirical studies in species with biparental care (e.g., Itzkowitz et al 2001;Hunt & Simmons 2002;Smiseth & Moore 2004;Harrison et al 2009;Lehtonen et al 2011) and cooperative breeders (e.g., Wright & Dingemanse 1999;MacGregor & Cockburn 2002;Zöttl et al 2013). …”

Section: Introductionmentioning

confidence: 88%

Flexible compensation of uniparental care: things are not always what they seem

Plasier¹

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Parental division of labour and the shift from minimal to maximal role specializations: an examination using a biparental fish

Cited by 78 publications

References 24 publications

The quantitative genetics of sex differences in parenting

The quantitative genetics of sex differences in parenting

Comparative gene expression profiles for highly similar aggressive phenotypes in male and female cichlid fishes (Julidochromis)

Flexible compensation of uniparental care: things are not always what they seem

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