Social dominance does not increase oxidative stress in a female dominance hierarchy of an African cichlid fish

Ethology ◽  
2021 ◽  
Author(s):  
Tyler R. Funnell ◽  
Robert J. Fialkowski ◽  
Peter D. Dijkstra
Keyword(s):  
Oxidative Stress ◽  
Social Dominance ◽  
Dominance Hierarchy ◽  
Cichlid Fish ◽  
Female Dominance ◽  
African Cichlid

scholarly journals Females of an African cichlid fish display male-typical social dominance behavior and elevated androgens in the absence of males

2012 ◽  
Vol 61 (4) ◽  
pp. 496-503 ◽  
Author(s):  
Suzy C.P. Renn ◽  
Eleanor J. Fraser ◽  
Nadia Aubin-Horth ◽  
Brian C. Trainor ◽  
Hans A. Hofmann
Keyword(s):  
Social Dominance ◽  
Cichlid Fish ◽  
Dominance Behavior ◽  
African Cichlid

scholarly journals Plasticity of the Reproductive Axis Caused by Social Status Change in an African Cichlid Fish: I. Pituitary Gonadotropins

Endocrinology ◽  
2011 ◽  
Vol 152 (1) ◽  
pp. 281-290 ◽  
Author(s):  
Karen P. Maruska ◽  
Berta Levavi-Sivan ◽  
Jakob Biran ◽  
Russell D. Fernald
Keyword(s):  
Dominance Hierarchy ◽  
Cichlid Fish ◽  
Mrna Levels ◽  
Status Change ◽  
African Cichlid ◽  
Protein Levels ◽  
Reproductive Axis ◽  
Tightly Coupled ◽  
Astatotilapia Burtoni ◽  
The Brain

Abstract Social position in a dominance hierarchy is often tightly coupled with fertility. Consequently, an animal that can recognize and rapidly take advantage of an opportunity to rise in rank will have a reproductive advantage. Reproduction in all vertebrates is controlled by the brain-pituitary-gonad axis, and in males of the African cichlid fish Astatotilapia burtoni, GnRH1 neurons at the apex of this axis are under social control. However, little is known about how quickly social information is transformed into functional reproductive change, or about how socially controlled changes in GnRH1 neurons influence downstream actions of the brain-pituitary-gonad axis. We created an opportunity for reproductively suppressed males to ascend in status and then measured how quickly the perception of this opportunity caused changes in mRNA and protein levels of the pituitary gonadotropins. mRNA levels of the β-subunits of LH and FSH rose rapidly in the pituitary 30 min after suppressed males perceived an opportunity to ascend. In contrast, mRNA levels of GnRH receptor-1 remained unchanged during social transition but were higher in stable dominant compared with subordinate males. In the circulation, levels of both LH and FSH were also quickly elevated. There was a positive correlation between mRNA in the pituitary and circulating protein levels for LH and FSH, and both gonadotropins were positively correlated with plasma 11-ketotestosterone. Our results show that the pituitary is stimulated extremely rapidly after perception of social opportunity, probably to allow suppressed males to quickly achieve reproductive success in a dynamic social environment.

Experimental evidence that social instability influences rank-specific patterns in oxidative stress in a cichlid fish

2021 ◽  
Author(s):  
Shana E. Border ◽  
Taylor J. Piefke ◽  
Tyler R. Funnell ◽  
Robert F. Fialkowski ◽  
Jacob Sawecki ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Social Dominance ◽  
Oxidative Dna Damage ◽  
Cichlid Fish ◽  
Social Stability ◽  
Reactive Oxygen Metabolites ◽  
Potential Cost ◽  
Total Antioxidant ◽  
The Stability ◽  
The Cost

In many animal societies, dominant individuals have priority access to resources. However, defending high rank can be costly, especially in unstable social hierarchies where there is more intense competition. Oxidative stress has been proposed as a potential cost of social dominance, but few studies have examined this cost in relation to social stability. We studied the cost of social dominance in the cichlid fish Astatotilapia burtoni by manipulating social stability among males in replicate naturalistic communities for 22 weeks. We found that our social stability treatment influenced status-specific patterns in 3 out of 6 measurements of oxidative stress. Specifically, dominant males experienced increased plasma oxidative damage (measured as reactive oxygen metabolites, ROM) compared to subordinate males in stable hierarchies only. Subordinate males in unstable hierarchies had higher ROM than their stable community counterparts, but we found no effect of social stability treatment for dominant males. However, dominant males tended to have lower liver total antioxidant capacity (TAC) than subordinate males in unstable hierarchies, suggesting that the cost of social dominance is higher in unstable hierarchies. There was no other effect of status in tissue (liver, gonad, muscle) or various redox markers including TAC and oxidative DNA damage. We conclude that the stability of the social environment influences the relative cost of social dominance in a tissue and marker specific manner.

scholarly journals The genomic substrate for adaptive radiation in African cichlid fish

Nature ◽  
2014 ◽  
Vol 513 (7518) ◽  
pp. 375-381 ◽  
Author(s):  
David Brawand ◽  
Catherine E. Wagner ◽  
Yang I. Li ◽  
Milan Malinsky ◽  
Irene Keller ◽  
...  
Keyword(s):  
Adaptive Radiation ◽  
Cichlid Fish ◽  
African Cichlid

How does the taxonomic status of allopatric populations influence species richness within African cichlid fish assemblages?

2003 ◽  
Vol 31 (1) ◽  
pp. 93-102 ◽  
Author(s):  
Martin J. Genner ◽  
Ole Seehausen ◽  
Daniel F.R. Cleary ◽  
Mairi E. Knight ◽  
Ellinor Michel ◽  
...  
Keyword(s):  
Species Richness ◽  
Fish Assemblages ◽  
Cichlid Fish ◽  
Taxonomic Status ◽  
African Cichlid ◽  
Allopatric Populations
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