scholarly journals Digest: More than just a pretty fin: The evolution of sexual ornaments in killifish

Evolution ◽  
2021 ◽  
Author(s):  
Vikram P. Narayan ◽  
Nidarshani Wasana ◽  
Yiguan Wang ◽  
Cara Conradsen
Keyword(s):  
Sexual Ornaments

scholarly journals Pheasant sexual ornaments reflect nutritional conditions during early growth

2002 ◽  
Vol 269 (1486) ◽  
pp. 21-27 ◽  
Author(s):  
Thomas Ohlsson ◽  
Henrik G. Smith ◽  
Lars Råberg ◽  
Dennis Hasselquist
Keyword(s):  
Early Growth ◽  
Sexual Ornaments ◽  
Nutritional Conditions

scholarly journals The relative effects of pace of life‐history and habitat characteristics on the evolution of sexual ornaments: A comparative assessment

Evolution ◽  
2021 ◽  
Author(s):  
Will Sowersby ◽  
Simon Eckerström‐Liedholm ◽  
Piotr K. Rowiński ◽  
Julia Balogh ◽  
Stefan Eiler ◽  
...  
Keyword(s):  
Life History ◽  
Comparative Assessment ◽  
Habitat Characteristics ◽  
Sexual Ornaments ◽  
Pace Of Life

Multiple Sexual Ornaments Coevolve with Multiple Mating Preferences

1999 ◽  
Vol 154 (1) ◽  
pp. 37-45 ◽  
Author(s):  
Robert Brooks ◽  
Vanessa Couldridge
Keyword(s):  
Multiple Mating ◽  
Mating Preferences ◽  
Sexual Ornaments

Stress and limits to adaptation: Sexual ornaments

1995 ◽  
Vol 8 (4) ◽  
pp. 455-461 ◽  
Author(s):  
P. A. Parsons
Keyword(s):  
Sexual Ornaments

scholarly journals Carotenoids, oxidative stress and female mating preference for longer lived males

2007 ◽  
Vol 274 (1618) ◽  
pp. 1591-1596 ◽  
Author(s):  
Thomas W Pike ◽  
Jonathan D Blount ◽  
Bjørn Bjerkeng ◽  
Jan Lindström ◽  
Neil B Metcalfe
Keyword(s):  
Oxidative Stress ◽  
Mate Choice ◽  
Gasterosteus Aculeatus ◽  
Reproductive Investment ◽  
Mating Preference ◽  
Implicit Assumption ◽  
Sexual Ornaments ◽  
Sexual Ornament ◽  
Breeding Attempt ◽  
Rate Of Ageing

Some of the most spectacular exaggerated sexual ornaments are carotenoid dependent. It has been suggested that such ornaments have evolved because carotenoid pigments are limiting for both signal expression and in their role as antioxidants and immunostimulants. An implicit assumption of this hypothesis is that males which can afford to produce more elaborate carotenoid-dependent displays are signalling their enhanced ability to resist parasites, disease or oxidative stress and hence would be predicted to live longer. Therefore, in species with carotenoid-dependent ornaments where a parent's future longevity is crucial for determining offspring survival, there should be a mating preference for partners that present the lowest risk of mortality during the breeding attempt, as signalled by the ability to allocate carotenoids to sexual displays. In an experimental study using three-spined sticklebacks ( Gasterosteus aculeatus ), we show that when dietary carotenoid intake is limited, males attempt to maintain their sexual ornament at the expense of body carotenoids and hence suffer from reduced reproductive investment and a shorter lifespan. These males also suffer from an increased susceptibility to oxidative stress, suggesting that this may constitute the mechanism underlying the increased rate of ageing. Furthermore, in pairwise mate-choice trials, females preferred males that had a greater access to carotenoids and chance of surviving the breeding season, suggesting that females can make adaptive mate choice decisions based on a male's carotenoid status and potential future longevity.

scholarly journals The effect of male-male competition and ornament size on mean and variance of courtship intensity towards heterospecific and conspecific females

2015 ◽  
Vol 65 (2) ◽  
pp. 113-131
Author(s):  
Inka Keränen ◽  
Aapo Kahilainen ◽  
Janne S. Kotiaho ◽  
Katja Kuitunen
Keyword(s):  
Reproductive Investment ◽  
Search Costs ◽  
Competitive Environment ◽  
Species Discrimination ◽  
Sexual Ornaments ◽  
Courtship Intensity ◽  
In The Wild ◽  
Mean And Variance ◽  
Calopteryx Splendens

Discrimination between hetero- and conspecifics is the elementary choice an individual performs when searching for potential mates. The level of selectivity and strength of species discrimination is modified by variance in the quality of females, level of the male’s reproductive investment, mate search costs, and the competitive environment. The effect of the competitive environment on both species discrimination and conspecific mate choice has seldom been studied simultaneously. We experimentally manipulated territorial competition ofCalopteryx splendensdamselfly males in the wild, and asked two questions. First, does increased competition influence the territorial males’ responses towards introduced heterospecificC. virgofemales. The effect of the size of the territorial males’ sexual ornaments (wing spot) on their responses towards females was also investigated. Second, does increased competition influence the territorial males’ response towards conspecific females? The effect of the size of the territorial males ornament was again investigated. The mean level of response towards heterospecific females did not change between the control (i.e., no competitors presented) and the competition (i.e., two competitors presented) treatments, but the variance of responses towards heterospecifics was greater in the competition treatment. The territorial males’ responses towards conspecific females did not change between control and competition treatments. These results indicate individual differences in the behavior of males towards heterospecifics when territorial competition was experienced. The observed pattern of discrimination might be adaptive when overall reproductive success is considered.

Maintenance of genetic variation in sexual ornaments: a review of the mechanisms

Genetica ◽  
2007 ◽  
Vol 134 (1) ◽  
pp. 113-127 ◽  
Author(s):  
Jacek Radwan
Keyword(s):  
Genetic Variation ◽  
Sexual Ornaments

scholarly journals Mate-choice copying: Status quo and where to go

2015 ◽  
Vol 61 (6) ◽  
pp. 1073-1081 ◽  
Author(s):  
Klaudia Witte ◽  
Nina Kniel ◽  
Ilka Maria Kureck
Keyword(s):  
Mate Choice ◽  
Public Information ◽  
Status Quo ◽  
Future Research ◽  
Present Evidence ◽  
Sexual Ornaments ◽  
Mate Choice Copying ◽  
Current State ◽  
Choice Strategy ◽  
State Of Research

Abstract Mate-choice copying is a fascinating and widespread mate-choice strategy. Individuals gather public information about potential mates by observing others during sexual interactions and choose or reject the same individual as a mate as the observed individual did before. The influence of copying behavior on an individual’s mate choice can be so strong that socially acquired information can override genetically based preferences for certain phenotypes. Thus, mate-choice copying enforces dynamic processes in sexual selection. Here, we review the current state of research on mate-choice copying and focus on sex-specific aspects. We present evidence that mate-choice copying can support the evolution of novel sexual ornaments, and we discuss potential costs of mate-choice copying when public information is not reliable. Moreover, we discuss the conflict faced by males that copy since mate-choice copying increases sperm competition. In conclusion we suggest interesting topics for future research in mate-choice copying.

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