ArticleHormones and behavior2013
Divergence in androgen sensitivity contributes to population differences in sexual dimorphism of electrocommunication behavior.
Article in Hormones and behavior, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed, 15 citations in OpenAlex.
- Population Variation in Steroid Hormone-Related Gene Expression and Sexually Dimorphic Communication in the Electric Fish Apteronotus albifrons.Journal of experimental zoology. Part A, Ecological and integrative physiology · 2025Article
- Sociality does not predict signal complexity in response to playback in apteronotid weakly electric fishes.Behavioral ecology and sociobiology · 2025Article
- Differential expression of steroid-related genes across electrosensory brain regions in two sexually dimorphic species of electric knifefish.General and comparative endocrinology · 2024Review
- Species variation in steroid hormone-related gene expression contributes to species diversity in sexually dimorphic communication in electric fishes.Hormones and behavior · 2024Article
- Evolution of androgen receptors contributes to species variation in androgenic regulation of communication signals in electric fishes.Molecular and cellular endocrinology · 2023Article
- Neuroendocrine mechanisms contributing to the coevolution of sociality and communication.Frontiers in neuroendocrinology · 2023Review
- Genes linked to species diversity in a sexually dimorphic communication signal in electric fish.Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2018Article
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
Abstract
Weakly-electric fish (Apteronotidae) produce highly diverse electrocommunication signals. Electric organ discharges (EODs) vary across species, sexes, and in the magnitude and direction of their sexual dimorphism. Gonadal steroid hormones can modulate EODs, and differences in androgen sensitivity are hypothesized to underlie variation in the degree of sexual dimorphism across species. In this study, we asked whether variation in androgen sensitivity explained variation in sexual dimorphism of EODs within species, at the population level. We examined two populations of black ghost knifefish (Apteronotus albifrons), one from the Orinoco and the other from the Amazon River Basin. EOD frequency (EODf) and chirp rates were measured to characterize diversity in sexual dimorphism across populations. The magnitude of sexual dimorphism in EODf differed significantly across populations, and was more pronounced in the Orinoco population than in the Amazon population. Chirp rates were sexually monomorphic in both populations. 11-Ketotestosterone (11-kT) was administered over a two-week period to assess population differences in sensitivity to androgens. 11-kT masculinized EODf significantly more in the population with the greater degree of sexual dimorphism. 11-kT had no effect on the sexually monomorphic chirping rates. We conclude that population divergence in androgen sensitivity contributes to variation in sexual dimorphism of EODf in A. albifrons.
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