Stimulation of dopamine D₁ receptor improves learning capacity in cooperating cleaner fish

Proceedings. Biological Sciences
João P MessiasMarta C Soares

Abstract

Accurate contextual decision-making strategies are important in social environments. Specific areas in the brain are tasked to process these complex interactions and generate correct follow-up responses. The dorsolateral and dorsomedial parts of the telencephalon in the teleost fish brain are neural substrates modulated by the neurotransmitter dopamine (DA), and are part of an important neural circuitry that drives animal behaviour from the most basic actions such as learning to search for food, to properly choosing partners and managing decisions based on context. The Indo-Pacific cleaner wrasse Labroides dimidiatus is a highly social teleost fish species with a complex network of interactions with its 'client' reef fish. We asked if changes in DA signalling would affect individual learning ability by presenting cleaner fish two ecologically different tasks that simulated a natural situation requiring accurate decision-making. We demonstrate that there is an involvement of the DA system and D1 receptor pathways on cleaners' natural abilities to learn both tasks. Our results add significantly to the growing literature on the physiological mechanisms that underlie and facilitate the expression of cooperative abilities.

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Citations

Jun 20, 2017·Molecular Ecology·Claudia KasperBarbara Taborsky
Feb 9, 2016·Scientific Reports·João P M MessiasMarta C Soares
Jun 3, 2017·Royal Society Open Science·Marta C SoaresJoão P M Messias
Nov 2, 2017·Frontiers in Behavioral Neuroscience·Marta C Soares
Jul 21, 2017·Biology Letters·Trevor J HamiltonDavid I Kline
Jan 27, 2019·Brain Research·Karen MaruskaCaio Maximino
Dec 3, 2021·Environmental Science & Technology·Sophie L GouldCharles R Tyler

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