The behavioral and neurobiological response to sound stress in salmon

Brain Behavior and Evolution, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 18

Published: May 16, 2024

Noise associated with human activities in aquatic environments can affect the physiology and behavior of species which may have consequences at population ecosystem levels. Low frequency sound is particularly stressful for fish, since it an important factor predator-prey interactions. Even though behavioral physiological studies been conducted to assess effects on fish species, neurobiological are still lacking.

Language: Английский

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Sex differences in aggression and its neural substrate in a cichlid fish

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Jan. 2, 2025

Language: Английский

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The effect of social context and learning on aggression biases: consequences for the role of male-male competition in speciation and a field study in cichlid fish

Frontiers in Ecology and Evolution, Journal Year: 2025, Volume and Issue: 13

Published: April 8, 2025

Male-male competition and female-female can play important roles in the origin maintenance of phenotypic polymorphism speciation. If territory owners bias aggression towards others their own phenotype, rare male phenotypes will be involved fewer costly fights, facilitating evolution diversity, stabilizing coexistence distinct or species. However, mechanisms that regulate biases have received little attention. We discuss how learning plasticity behavioral may dramatically influence evolve, which turn consequences for clarifying role intrasexual process then present data from a field study two cichlid species Lake Victoria illustrate social environment could modulate territorial males specific intruder phenotypes. Specifically, Pundamilia nyererei (males are red) P. ‘pink anal’ blue), blue holders showed tendency to shift more red (stimulus) relative when these had neighbors. By contrast, tended reduce they were surrounded by Although sample sizes small, our suggest context shape complex effects vary between conclude considering experience shaping advance understanding mate shapes evolutionary patterns diversification.

Language: Английский

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Galanin neuron activation in feeding, parental care, and infanticide in a mouthbrooding African cichlid fish

Hormones and Behavior, Journal Year: 2020, Volume and Issue: 126, P. 104870 - 104870

Published: Oct. 5, 2020

Language: Английский

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Brain areas activated during visual learning in the cichlid fish Pseudotropheus zebra

Brain Structure and Function, Journal Year: 2023, Volume and Issue: 228(3-4), P. 859 - 873

Published: March 15, 2023

Abstract The neural correlates of most cognitive functions in fish are unknown. This project aimed to identify brain regions involved visual learning the cichlid Pseudotropheus zebra . expression protein pS6 was measured 19 areas and compared between groups individuals subjected four different behavioral contexts (control, avoidance, trained, novelty groups). Control group were sacrificed with minimal interactions. Fish avoidance chased a net for an hour, after which they sacrificed. Individuals trained received daily training sessions associate object food reward. They day reached criterion. habituated one set stimuli, then faced change stimulus type (novelty stimulus) before three treatment showed largest activation inferior lobes tectum opticum control group. additional preoptic area, several telencephalic regions, torus semicircularis, reticular formation. that reward, lateralis, tertiary gustatory center. only area strong all nucleus diffusus situated within lobe. lobe receives prominent input from via glomerulosus but so far, nothing is known about functional details this pathway. Our study first time play important role recognition.

Language: Английский

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Sex Differences in Aggression Are Paralleled by Differential Activation of the Brain Social Decision-Making Network in Zebrafish

Frontiers in Behavioral Neuroscience, Journal Year: 2022, Volume and Issue: 16

Published: Feb. 16, 2022

Although aggression is more prevalent in males, females also express aggressive behaviors and specific ecological contexts can be than males. The aim of this work to assess sex differences characterize the patterns neuronal activation social-decision making network (SDMN) response intra-sexual both male female zebrafish. Adult fish were exposed social interaction with a same-sex opponent all behavioral displays, latency, time resolution quantified. After conflict resolution, brains sampled on functional connectivity throughout SDMN assessed by immunofluorescence marker pS6. Results suggest that sexes share similar level motivation for aggression, but encounters show shorter preferential use antiparallel displays instead overt showing reduction putative maladaptive effects. there are no any individual brain area from SDMN, agonistic interactions increased activity most areas sexes. Functional was using bootstrapped adjacency matrices capture co-activation nodes. Male winners overall excitation showed changes inhibition across whereas losers decrease comparison non-interacting control fish. Moreover, centrality analysis revealed shared hubs, as well sex-specific between each condition SDMN. In summary, distinct neural pattern associated experience during fights found sex, suggesting differential consequence experience. Overall, our study adds insights into behavior architecture intrasexual

Language: Английский

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Transcriptomic changes associated with maternal care in the brain of mouthbrooding cichlid Astatotilapia burtoni reflect adaptation to self-induced metabolic stress

Journal of Experimental Biology, Journal Year: 2023, Volume and Issue: 226(4)

Published: Jan. 30, 2023

ABSTRACT Parental care in Astatotilapia burtoni entails females protecting eggs and developing fry a specialized buccal cavity the mouth. During this mouthbrooding behavior, which can last 2–3 weeks, mothers undergo voluntary fasting accompanied by loss of body mass major metabolic changes. Following release fry, resume normal feeding behavior quickly recover as they become reproductively active once again. In order to investigate molecular underpinnings such dramatic behavioral changes, we sequenced whole-brain transcriptomes from at four time points throughout their reproductive cycle: 2 days after start mouthbrooding, 14 fry. Differential expression analysis clustering profiles revealed number neuropeptides hormones, including strong candidate gene neurotensin, suggesting that mechanisms underlying parental behaviors may be common across vertebrates despite de novo evolution these lineages. addition, oxygen transport pathways were found dramatically downregulated, particularly later stage, while certain neuroprotective upregulated, possibly mitigate negative consequences depression brought about fasting. Our results offer new insights into well revealing genes would interest for study hypoxic ischemia eating disorders.

Language: Английский

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Sex differences in aggression and its neural substrate in a cichlid fish

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2023, Volume and Issue: unknown

Published: Oct. 20, 2023

Abstract Aggression is ubiquitous among social species and functions to maintains dominance hierarchies. The African cichlid fish Astatotilapia burtoni an ideal study for studying aggression due their unique flexible hierarchy. However, female in this the neural mechanisms of both sexes not well understood. To further understand potential sex differences species, we characterized male A. a mirror assay. We then quantified activation patterns brain regions behavior network (SBN) investigate if are reflected with immunohistochemistry by detecting phosphorylated ribosome marker phospho-S6 ribosomal protein (pS6), activation. found that perform identical sex-specific aggressive behaviors response observed pS6 immunoreactivity Vv, homolog lateral septum mammals. Males but females had higher ps6 ATn after ventromedial hypothalamus mammals, which strongly implicated regulation males. Several also have negative controls than exposed mirror, implicating role inhibitory neurons suppressing until relevant stimulus present. Male display similar sexually dimorphic behavioral There corresponding SBN. In males females, clusters POA, revealing functional connectivity these triggered context These findings suggest distinct circuitry underlie , serving as foundation future work investigating molecular underpinnings reveal fundamental insights into understanding aggression.

Language: Английский

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The dorsal part of the anterior tuberal nucleus responds to auditory stimulation in zebrafish (Danio rerio)

eNeuro, Journal Year: 2024, Volume and Issue: 11(7), P. ENEURO.0062 - 24.2024

Published: June 25, 2024

The zebrafish, a widely used model in neurobiology, relies on hearing aquatic environments. Unfortunately, its auditory pathways have mainly been studied larvae. In this study, we examined the involvement of anterior tuberal nucleus (AT) processing adult zebrafish. Our tract-tracing experiments revealed that dorsal subdivision AT is strongly bidirectionally connected to central torus semicircularis (TSc), major fishes. Immunohistochemical visualization ribosomal protein S6 (pS6) phosphorylation map neural activity response stimulation substantiated finding: but not ventral part responded stimulation. A similar was present TSc isthmi, visual region, which as control for testing if pS6 activation specific We also measured time course phosphorylation, previously unreported teleost fish. After stimulation, found peaked between 100 and 130 min returned baseline levels after 190 min. This information will be valuable design future experiments. results suggest an anatomical functional AT, where only connects network processes information.

Language: Английский

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Expression and localization of neuronal nitric oxide synthase in the brain and sensory tissues of the African cichlid fish Astatotilapia burtoni

The Journal of Comparative Neurology, Journal Year: 2022, Volume and Issue: 530(16), P. 2901 - 2917

Published: July 4, 2022

Abstract Nitric oxide (NO) produced by the enzyme neuronal nitric synthase serves as an important neurotransmitter in central nervous system that is involved reproductive regulation, learning, sensory processing, and other forms of neural plasticity. Here, we map distribution nnos ‐expressing cells brain retina cichlid fish Astatotilapia burtoni using situ hybridization. In brain, are found from olfactory bulbs to hindbrain, including within specific nuclei decision‐making, neuroendocrine expression social behaviors. retina, inner nuclear layer, presumably amacrine cells. We also used quantitative PCR test for differences eye males females different states statuses. eye, express more than females, socially dominant subordinate males, but did not differ among female states. bulbs, had greater males. These results suggest a status‐specific function NO signaling visual systems may be perception related mating or territorial interactions maintain hierarchy. The widespread throughout similar teleosts, with some conserved localization patterns across vertebrates, suggesting diverse functions this system.

Language: Английский

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