Behavioural responses to visual and chemical cues in Mozambique tilapia (Oreochromis mossambicus): a putative pheromonal activity for 17β-estradiol 3-glucuronate

Behavioral Ecology and Sociobiology, Journal Year: 2025, Volume and Issue: 79(4)

Published: April 1, 2025

Language: Английский

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One-trial odour recognition learning and its underlying brain areas in the zebrafish

Behavioural Brain Research, Journal Year: 2024, Volume and Issue: 465, P. 114949 - 114949

Published: March 11, 2024

Distinguishing familiar from novel stimuli is critical in many animals' activities, and procedures based on this ability are among the most exploited translational research rodents. However, recognition learning underlying brain substrates remain unclear outside a few mammalian species. Here, we investigated one-trial for olfactory teleost fish using behavioural molecular approach. With our analysis, found that zebrafish can learn to recognise odour after single encounter then, discriminate between different one provided structure of cues relatively differentiated. Subsequently, by expression analysis immediate early genes main areas, telencephalon was activated when encountered odour, whereas hypothalamus optic tectum were response odours. Overall, study evidence single-trial spontaneous odours presence multiple neural involved process. These findings promising development models investigate cognitive functions.

Language: Английский

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Amyloid Beta Precursor Protein contributes to brain aging and learning decline in short-lived turquoise killifish (Nothobranchius furzeri)

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 12, 2024

Abstract Amyloid beta (Aβ) accumulation is associated with inflammation, neurodegeneration, and cognitive decline in the context of neurodegenerative diseases. However, its role during normal aging remains largely unexplored. In this study, we investigated natural impact Aβ precursor protein ( app ) on brain using a short-lived vertebrate model, turquoise killifish Nothobranchius furzeri ). We identified amyloid derivatives across different age groups found that pyroglutamated —a neurotoxic variant—accumulates intra-neuronally an age-dependent manner, co-localizing apoptosis marker TUNEL. To determine whether contributes to spontaneous aging, used CRISPR/Cas9 generate “amyloid a” appa knock-out strain. Notably, −/− mutants exhibited reduced cell death overall younger proteome, as well improved learning capacity old age. Taken together, broadly affects making it promising target for anti-aging interventions.

Language: Английский

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Evolution of the visual system in ray-finned fishes

Visual Neuroscience, Journal Year: 2023, Volume and Issue: 40

Published: Jan. 1, 2023

Abstract The vertebrate eye allows to capture an enormous amount of detail about the surrounding world which can only be exploited with sophisticated central information processing. Furthermore, vision is active process due head and movements that enables animal change gaze actively select objects investigate in detail. entire system requires a coordinated coevolution its parts work properly. Ray-finned fishes offer unique opportunity study evolution visual high diversity all parts. Here, we are bringing together on retinal specializations (fovea), centers (brain morphology studies), large number ray-finned cladistic framework. nucleus glomerulosus-inferior lobe well developed Acanthopterygii. A fovea, independent movements, enlargement coevolved at least five times independently within This suggests involved advanced object recognition especially association fovea movements. None non-Acanthopterygii have (except for some deep sea fish) or they also lack important system. structures evolved ones tetrapods non-ray-finned as result retinal, central, oculomotor structures.

Language: Английский

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Quantifying the Neural and Behavioral Correlates of Repeated Social Competition in the Fighting Fish Betta splendens

Fishes, Journal Year: 2023, Volume and Issue: 8(8), P. 384 - 384

Published: July 25, 2023

The fighting fish Betta splendens, long studied for its aggressive territorial competitions, has the potential to be a tractable and relevant model studying intersection of cognitive ecology social neuroscience. Yet, few studies have comprehensively assessed behavior across both nonsocial contexts. Furthermore, present study is first quantify expression phosphorylated ribosomal protein S6 (PS6), proxy neural response, in telencephalon. Here, we male suite tasks found that response mirror, but not neophilia (a novel object) nor anxiety (scototaxis), predicted competition. To then explore aspects competition, exposed either familiar or opponent compared their competitive as well responses teleost homologs hippocampus, basolateral amygdala, lateral septum. We did detect any differences between familiar-exposed novel-exposed individuals, by implementing use habituation–dishabituation competition design Betta, were able observe remarkable consistency outcomes repeated exposures. Taken together, lays groundwork expanding integrative multidimensional questions cognition.

Language: Английский

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The incomparable fascination of comparative physiology: 40 years with animals in the field and laboratory

Journal of Comparative Physiology A, Journal Year: 2023, Volume and Issue: 210(2), P. 211 - 226

Published: Nov. 21, 2023

This paper is not meant to be a review article. Instead, it gives an overview of the major research projects that author, together with his students, colleagues and collaborators, has worked on. Although main focus author's work always been fish lateral line, this mainly about all other he did or were done in laboratory. These include studies on fishing spiders, weakly electric fish, seals, water rats, bottom dwelling sharks, freshwater rays, venomous snakes, birds prey, fire loving beetles backswimmers. The reasons for diversity projects? Simple. authors's lifelong enthusiasm animals, nature's ingenuity inventing new biological solutions. Indeed, most certainly was principal reason why Karl von Frisch Alfred Kühn founded Zeitschrift für vergleichende Physiologie (now Journal Comparative Physiology A) 100 years ago.

Language: Английский

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GABA-immunoreactive neurons in the Central Nervous System of the viviparous teleost Poecilia sphenops

Journal of Chemical Neuroanatomy, Journal Year: 2023, Volume and Issue: 133, P. 102339 - 102339

Published: Sept. 9, 2023

Language: Английский

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Activation patterns of dopaminergic cell populations reflect different learning scenarios in a cichlid fish, Pseudotropheus zebra

Journal of Chemical Neuroanatomy, Journal Year: 2023, Volume and Issue: 133, P. 102342 - 102342

Published: Sept. 16, 2023

Language: Английский

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