Mostrando recursos 1 - 11 de 11

  1. Cognitive appraisal of environmental stimuli induces emotion-like states in fish

    Cerqueira, M.; Millot, S.; Castanheira, M. F.; Félix, A. S.; Silva, T.; Oliveira, G. A.; Oliveira, C. C.; Martins, C. I. M.; Oliveira, R. F.
    This deposit is composed by the main article plus the supplementary materials of the publication.

  2. Cognitive appraisal of environmental stimuli induces emotion-like states in fish

    Cerqueira, M.; Millot, S.; Castanheira, M. F.; Félix, A. S.; Silva, T.; Oliveira, G. A.; Oliveira, C. C.; Martins, C. I. M.; Oliveira, R. F.
    This deposit is composed by the main article plus the supplementary materials of the publication.

  3. Audience Effects in Territorial Defense of Male Cichlid Fish Are Associated with Differential Patterns of Activation of the Brain Social Decision-Making Network

    Roleira, António; Oliveira, Gonçalo A.; Lopes, João S.; Oliveira, Rui F.
    This deposit is composed by the main article plus the supplementary materials of the publication.

  4. Homeodomain protein Otp affects developmental neuropeptide switching in oxytocin neurons associated with a long-term effect on social behavior

    Wircer, Einav; Blechman, Janna; Borodovsky, Nataliya; Tsoory, Michael; Nunes, Ana Rita; Oliveira, Rui F; Levkowitz, Gil
    No supplementary materials.

  5. Mechanisms of social buffering of fear in zebrafish

    Faustino, Ana I.; Tacão-Monteiro, André; Oliveira, Rui F.
    The supplementary materials such the videos, are not present in the deposit due to incompatibilty of the extension of the files with the repository.

  6. Assessment of fight outcome is needed to activate socially driven transcriptional changes in the zebrafish brain

    Oliveira, Rui F; Simões, José M; Teles, Magda C; Oliveira, Catarina R; Becker, Jorg D; Lopes, João S
    Group living animals must be able to express different behavior profiles depending on their social status. Therefore, the same genotype may translate into different behavioral phenotypes through socially driven differential gene expression. However, how social information is translated into a neurogenomic response and what are the specific cues in a social interaction that signal a change in social status are questions that have remained unanswered. Here, we show for the first time, to our knowledge, that the switch between status-specific neurogenomic states relies on the assessment of fight outcome rather than just on self- or opponent-only assessment of fighting ability....

  7. Neurogenomic mechanisms of social plasticity

    Cardoso, S. D.; Teles, M. C.; Oliveira, R. F.
    Group-living animals must adjust the expression of their social behaviour to changes in their social environment and to transitions between life-history stages, and this social plasticity can be seen as an adaptive trait that can be under positive selection when changes in the environment outpace the rate of genetic evolutionary change. Here, we propose a conceptual framework for understanding the neuromolecular mechanisms of social plasticity. According to this framework, social plasticity is achieved by rewiring or by biochemically switching nodes of a neural network underlying social behaviour in response to perceived social information. Therefore, at the molecular level, it depends...

  8. Face Your Fears: Cleaning Gobies Inspect Predators despite Being Stressed by Them

    Soares, Marta C.; Bshary, Redouan; Cardoso, Sónia C.; Côté, Isabelle M.; Oliveira, Rui F.
    social stressors typically elicit two distinct behavioural responses in vertebrates: an active response (i.e., "fight or flight") or behavioural inhibition (i.e., freezing). Here, we report an interesting exception to this dichotomy in a Caribbean cleaner fish, which interacts with a wide variety of reef fish clients, including predatory species. Cleaning gobies appraise predatory clients as potential threat and become stressed in their presence, as evidenced by their higher cortisol levels when exposed to predatory rather than to non-predatory clients. Nevertheless, cleaning gobies neither flee nor freeze in response to dangerous clients but instead approach predators faster (both in captivity and...

  9. Arginine vasotocin regulation of interspecific cooperative behaviour in a cleaner fish

    Soares, Marta C; Bshary, Redouan; Mendonça, Rute; Grutter, Alexandra S; Oliveira, Rui F
    In an interspecific cooperative context, individuals must be prepared to tolerate close interactive proximity to other species but also need to be able to respond to relevant social stimuli in the most appropriate manner. The neuropeptides vasopressin and oxytocin and their non-mammalian homologues have been implicated in the evolution of sociality and in the regulation of social behaviour across vertebrates. However, little is known about the underlying physiological mechanisms of interspecific cooperative interactions. In interspecific cleaning mutualisms, interactions functionally resemble most intraspecific social interactions. Here we provide the first empirical evidence that arginine vasotocin (AVT), a non-mammalian homologue of arginine...

  10. A Three-Dimensional Stereotaxic MRI Brain Atlas of the Cichlid Fish Oreochromis mossambicus

    Simões, José M.; Teles, Magda C.; Oliveira, Rui F.; Van der Linden, Annemie; Verhoye, Marleen
    The African cichlid Oreochromis mossambicus (Mozambique tilapia) has been used as a model system in a wide range of behavioural and neurobiological studies. The increasing number of genetic tools available for this species, together with the emerging interest in its use for neurobiological studies, increased the need for an accurate hodological mapping of the tilapia brain to supplement the available histological data. The goal of our study was to elaborate a three-dimensional, high-resolution digital atlas using magnetic resonance imaging, supported by Nissl staining. Resulting images were viewed and analysed in all orientations (transverse, sagittal, and horizontal) and manually labelled to...

  11. Androgen responsiveness to competition in humans: the role of cognitive variables

    Oliveira, Rui; Oliveira, Gonçalo
    Although androgens are commonly seen as male sex hormones, it has been established over the years that in both sexes, androgens also respond to social challenges. To explain the socially driven changes in androgens, two theoretical models have been proposed: the biosocial model and the challenge hypothesis. These models are typically seen as partly overlapping; however, they generate different predictions that are clarified here. In humans, sports competition and nonmetabolic competitive tasks have been used in the laboratory setting, as a proxy for agonistic interactions in animals. The results reviewed here show that the testosterone (T) response to competition in...

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