Carotenoids‐based reddish pelvic spines in nonreproducing female and male sticklebacks (<i>Gasterosteus aculeatus</i>) – Signalling social dominance?

Kroken, Karl Kristian; Sæthre, Axel Aas; Nicolaisen, Ove; Egeland, Torvald Blikra; Nordeide, Jarle Tryti

doi:10.1002/ece3.7892

Cited by 3 publications

(1 citation statement)

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“…Studies published in the later years give ambiguous conclusions as well, with some studies being in accordance with (Cantarero et al, 2017;Cotton et al, 2015;Hernández et al, 2021;Lüdtke & Foerster, 2018, 2019, and others contrary to (Caro et al, 2021, andRigaill &Garcia, 2021) predictions from the direct selection hypothesis. Some studies give support to the genetic correlation hypothesis (Sganga & Greco, 2019), and the social selection hypothesis (Enbody et al, 2018, see also Kroken et al, 2021). A few studies simply suggest female ornaments to signal readiness to reproduce (e.g., Belliure et al, 2018;Laplante, 2015).…”

Section: Introductionmentioning

confidence: 98%

Does egg carotenoid improve larval quality in Arctic charr (Salvelinus alpinus)?

Egeland

Nordeide

2022

Ecology and Evolution

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Females in mutually ornamented species are often less conspicuously ornamented than their male conspecifics. It has been hypothesized that offspring quality may decrease if females invest more resources into ornaments at the expense of resources in eggs. An experiment was carried out to test whether natural variation in carotenoid in the eggs from a wild population of Arctic charr (Salvelinus alpinus) was associated with survival and growth of their offspring until hatching. Wild Arctic charr were caught at a spawning ground during the spawning period. Eggs from two different females, one female with yellowish carotenoid-rich eggs and one with paler eggs, were fertilized by sperm from the same male. This was repeated until gametes were collected from 42 females and 21 males, giving a total of 21 groups. After fertilization, the zygotes from each of the two females were reared in four replicated groups. These 168 groups were reared separately until hatching when the surviving larvae were counted and their body length measured. For the two response variables survival and body length at hatching, no effect was demonstrated of any of the predictors (i) amount of carotenoid in the unfertilized eggs, (ii) the mothers' body condition, or (iii) ornament intensity of their red carotenoid-based abdominal ornament. Thus, this study gives no support for the hypothesis that females investing less carotenoid into their eggs suffer from decreased offspring quality until hatching. This lack of association between female ornament intensity and their fitness is not as expected if female ornaments evolved due to direct sexual selection from males on the more ornamented females ("direct selection hypothesis").

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Section: Introductionmentioning

confidence: 98%

Does egg carotenoid improve larval quality in Arctic charr (Salvelinus alpinus)?

Egeland

Nordeide

2022

Ecology and Evolution

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Phenotypic correlates of pelvic spine coloration in the threespine stickleback (Gasterosteus aculeatus): implications for function and evolution

Anderson

McKinnon

2022

Behav Ecol Sociobiol

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Ultrastructural analysis of throat dermal tissue and chromatophore components in the threespine stickleback (Gasterosteus aculeatus)

Anderson,

Fink,

McKinnon

2023

PeerJ

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The threespine stickleback (Gasterosteus aculeatus) is an important model for studying the evolution of nuptial coloration, but histological analyses of color are largely lacking. Previous analyses of one nuptial coloration trait, orange-red coloration along the body, have indicated carotenoids are the main pigment producing this color. In addition, recent gene expression studies found variation in the correlates of throat coloration between the sexes and between populations, raising the possibility of variation in the mechanisms underlying superficially similar coloration. We used transmission electron microscopy (TEM) to investigate the histological correlates of color in the throat dermal tissue of threespine stickleback from Western North America, within and between sexes, populations, and ecotypes. Ultrastructural analysis revealed carotenoid-containing erythrophores to be the main chromatophore component associated with orange-red coloration in both males and females across populations. In individuals where some darkening of the throat tissue was present, with no obvious orange-red coloration, erythrophores were not detected. Melanophore presence was more population-specific in expression, including being the only chromatophore component detected in a population of darker fish. We found no dermal chromatophore units within colorless throat tissue. This work confirms the importance of carotenoids and the erythrophore in producing orange-red coloration across sexes, as well as melanin within the melanophore in producing darkened coloration, but does not reveal broad histological differences among populations with similar coloration.

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Carotenoids‐based reddish pelvic spines in nonreproducing female and male sticklebacks (Gasterosteus aculeatus) – Signalling social dominance?

Abstract: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Cited by 3 publications

References 59 publications

Does egg carotenoid improve larval quality in Arctic charr (Salvelinus alpinus)?

Does egg carotenoid improve larval quality in Arctic charr (Salvelinus alpinus)?

Phenotypic correlates of pelvic spine coloration in the threespine stickleback (Gasterosteus aculeatus): implications for function and evolution

Ultrastructural analysis of throat dermal tissue and chromatophore components in the threespine stickleback (Gasterosteus aculeatus)

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