scholarly journals Evolution of egg dummies in Tanganyikan cichlid fishes: the roles of parental care and sexual selection

2013 ◽  
Vol 26 (11) ◽  
pp. 2369-2382 ◽  
Author(s):  
M. Amcoff ◽  
A. Gonzalez-Voyer ◽  
N. Kolm
Keyword(s):  
Sexual Selection ◽  
Parental Care ◽  
Cichlid Fishes ◽  
Tanganyikan Cichlid

scholarly journals SEXUAL SELECTION DETERMINES PARENTAL CARE PATTERNS IN CICHLID FISHES

Evolution ◽  
2008 ◽  
Vol 62 (8) ◽  
pp. 2015-2026 ◽  
Author(s):  
Alejandro Gonzalez-Voyer ◽  
John L. Fitzpatrick ◽  
Niclas Kolm
Keyword(s):  
Sexual Selection ◽  
Parental Care ◽  
Cichlid Fishes ◽  
Care Patterns

Are parental care trade-offs in shorebirds driven by parental investment or sexual selection?

2009 ◽  
Vol 22 (4) ◽  
pp. 672-682 ◽  
Author(s):  
V. A. OLSON ◽  
T. J. WEBB ◽  
R. P. FRECKLETON ◽  
T. SZÉKELY
Keyword(s):  
Sexual Selection ◽  
Parental Care ◽  
Parental Investment ◽  
Trade Offs

scholarly journals Sexual selection favours male parental care, when females can choose

2011 ◽  
Vol 279 (1734) ◽  
pp. 1784-1790 ◽  
Author(s):  
Suzanne H. Alonzo
Keyword(s):  
Sexual Selection ◽  
Parental Care ◽  
Female Choice ◽  
Mating Success ◽  
Current Theory ◽  
Sharp Contrast ◽  
Recent Theory ◽  
Extra Pair Paternity ◽  
Female Promiscuity ◽  
Male Care

Explaining the evolution of male care has proved difficult. Recent theory predicts that female promiscuity and sexual selection on males inherently disfavour male care. In sharp contrast to these expectations, male-only care is often found in species with high extra-pair paternity and striking variation in mating success, where current theory predicts female-only care. Using a model that examines the coevolution of male care, female care and female choice; I show that inter-sexual selection can drive the evolution of male care when females are able to bias mating or paternity towards parental males. Surprisingly, female choice for parental males allows male care to evolve despite low relatedness between the male and the offspring in his care. These results imply that predicting how sexual selection affects parental care evolution will require further understanding of why females, in many species, either do not prefer or cannot favour males that provide care.

Parental Care and Sexual Selection

2008 ◽  
pp. 377-409 ◽  
Author(s):  
Kai Lindström ◽  
Colette Mary
Keyword(s):  
Sexual Selection ◽  
Parental Care

scholarly journals The evolution of sexual dimorphism in parasitic cuckoos: sexual selection or coevolution?

2007 ◽  
Vol 274 (1617) ◽  
pp. 1553-1560 ◽  
Author(s):  
O Krüger ◽  
N.B Davies ◽  
M.D Sorenson
Keyword(s):  
Sexual Selection ◽  
Sexual Dimorphism ◽  
Parental Care ◽  
Brood Parasitism ◽  
Selection Pressure ◽  
Life Histories ◽  
Exceptional Case ◽  
Evolutionary Pathways ◽  
Common Situation

Sexual dimorphism is ubiquitous in animals and can result from selection pressure on one or both sexes. Sexual selection has become the predominant explanation for the evolution of sexual dimorphism, with strong selection on size-related mating success in males being the most common situation. The cuckoos (family Cuculidae) provide an exceptional case in which both sexes of many species are freed from the burden of parental care but where coevolution between parasitic cuckoos and their hosts also results in intense selection. Here, we show that size and plumage differences between the sexes in parasitic cuckoos are more likely the result of coevolution than sexual selection. While both sexes changed in size as brood parasitism evolved, we find no evidence for selection on males to become larger. Rather, our analysis indicates stronger selection on parasitic females to become smaller, resulting in a shift from dimorphism with larger females in cuckoos with parental care to dimorphism with larger males in parasitic species. In addition, the evolution of brood parasitism was associated with more cryptic plumage in both sexes, but especially in females, a result that contrasts with the strong plumage dimorphism seen in some other parasitic birds. Examination of the three independent origins of brood parasitism suggests that different parasitic cuckoo lineages followed divergent evolutionary pathways to successful brood parasitism. These results argue for the powerful role of parasite–host coevolution in shaping cuckoo life histories in general and sexual dimorphism in particular.

scholarly journals Positive feedback and alternative stable states in inbreeding, cooperation, sex roles and other evolutionary processes

2012 ◽  
Vol 367 (1586) ◽  
pp. 211-221 ◽  
Author(s):  
Jussi Lehtonen ◽  
Hanna Kokko
Keyword(s):  
Sexual Selection ◽  
Parental Care ◽  
Positive Feedback ◽  
Alternative Stable States ◽  
Operational Sex Ratio ◽  
Evolution Of Cooperation ◽  
Systems Science ◽  
Stable States ◽  
Uniparental Care ◽  
The Relationship

A large proportion of studies in systems science focus on processes involving a mixture of positive and negative feedbacks, which are also common themes in evolutionary ecology. Examples of negative feedback are density dependence (population regulation) and frequency-dependent selection (polymorphisms). Positive feedback, in turn, plays a role in Fisherian ‘runaway’ sexual selection, the evolution of cooperation, selfing and inbreeding tolerance under purging of deleterious alleles, and the evolution of sex differences in parental care. All these examples feature self-reinforcing processes where the increase in the value of a trait selects for further increases, sometimes via a coevolutionary feedback loop with another trait. Positive feedback often leads to alternative stable states (evolutionary endpoints), making the interpretation of evolutionary predictions challenging. Here, we discuss conceptual issues such as the relationship between self-reinforcing selection and disruptive selection. We also present an extension of a previous model on parental care, focusing on the relationship between the operational sex ratio and sexual selection, and the influence of this relationship on the evolution of biparental or uniparental care.

scholarly journals Repeated Parallel Evolution of Parental Care Strategies within Xenotilapia, a Genus of Cichlid Fishes from Lake Tanganyika

PLoS ONE ◽  
2012 ◽  
Vol 7 (2) ◽  
pp. e31236 ◽  
Author(s):  
Michael R. Kidd ◽  
Nina Duftner ◽  
Stephan Koblmüller ◽  
Christian Sturmbauer ◽  
Hans A. Hofmann
Keyword(s):  
Parental Care ◽  
Lake Tanganyika ◽  
Parallel Evolution ◽  
Cichlid Fishes
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