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Un pez eléctrico débil que no descansa: Novelty response durante el reposo del pez habitante de la arena Gymnorhamphichthys rondoni en Leticia-Amazonas

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authorProfile.id.code201412982
dc.contributor.advisorMolina Escobar, Jorge Alberto
dc.contributor.authorRealpe Sanabria, Pablo Emilio
dc.contributor.juryBenavides López, José Luis
dc.contributor.juryGutiérrez Cortés, Ángela Liliana
dc.contributor.researchgroupFacultad de Ciencias::Cimpat. Centro de Investigaciones en Microbiología y Parasitologia Tropical
dc.date.accessioned2025-08-01T19:38:31Z
dc.date.available2025-08-01T19:38:31Z
dc.date.issued2025-06-04
dc.description.abstractEl pez eléctrico débil Gymnorhamphichthys rondoni (Gymnotiformes: Rhamphichthyidae) reposa de día enterrado en la arena de arroyos de tierra firme de la Amazonía, manteniendo sus pulsos de descargas del órgano eléctrico (DOEs) a una tasa promedio de 15 Hz. Sin embargo, durante el reposo se pueden presentar incrementos abruptos en la frecuencia de descarga seguidos de una recuperación al nivel original y que en la literatura se conocen como Novelty response (Nr). Este estudio busca caracterizar los Nr en los patrones de DOEs de G. rondoni durante el reposo diurno bajo condiciones naturales en un arroyo amazónico (Yahuarcaca, Colombia). Para ello se analizaron grabaciones continuas de los DOEs obtenidos entre las 6:00 am y las 6:00 pm en varios individuos de G. rondoni por medio de la herramienta Rate Meter del software LabChart 8. Como resultados se encontraron 891 eventos de Nr correspondientes a grabaciones de 19 individuos registrados individualmente. De estos eventos de Nr el 84,85% (756/891) corresponden a eventos sencillos, el 14,81% (132/891) fueron eventos dobles y el 0,33% (3/891) a eventos triples. El análisis horario de la presencia de los eventos de Nr demuestra que no hay ninguna hora durante el periodo de reposo con un mayor número de ellos; pero si se observa que un mayor número de eventos de Nr se presentan en las horas posteriores al medio día. En promedio se presentan 4,24 eventos de Nr por hora durante el tiempo de reposo en G. rondoni. Además, en una muestra de 487 eventos de Nr se encontró una correlación significativa entre la amplitud en los eventos de Nr y la duración en el tiempo de recuperación del Nr al estado basal (R² = 0,61, p < 0,001). Tres posibles hipótesis sobre el papel de los eventos de Nr durante el reposo en individuos de G. rondoni se discuten.spa
dc.description.abstractThe weakly electric fish Gymnorhamphichthys rondoni (Gymnotiformes: Rhamphichthyidae) rests during the day buried in the sand of terra firme streams in the Amazonía, emitting electric organ discharges (EODs) at an average rate of 15 Hz. However, abrupt increases in discharge frequency may occur during rest, followed by a return to baseline, a behavior referred to in the literature as Novelty response (Nr). This study characterizes Nr events in the EOD patterns of G. rondoni during daytime rest under natural conditions in an Amazonía stream (Yahuarcaca, Colombia). We analyzed continuous EOD recordings from 6:00 am to 6:00 pm in multiple G. rondoni individuals using LabChart 8’s Rate Meter tool. Overall, 891 Nr events were identified across 19 fish. Of these, 84.85% (756/891) were single events, 14.81% (132/891) double events, and 0.33% (3/891) triple events. Hourly analysis showed no peak in Nr events during the resting period, although higher numbers occurred after midday. The mean rate of Nr events was 4.24 per hour. In a subset of 487 Nr events, amplitude correlated significantly with recovery time to baseline (R² = 0.61, p < 0.001). We discuss three potential hypotheses for the function of Nr events in G. rondoni individuals during resting time.eng
dc.description.degreelevelMaestría
dc.format.extent30 páginas
dc.format.mimetypeapplication/pdf
dc.identifier.instnameinstname:Universidad de los Andes
dc.identifier.reponamereponame:Repositorio Institucional Séneca
dc.identifier.repourlrepourl:https://repositorio.uniandes.edu.co/
dc.identifier.urihttps://hdl.handle.net/1992/76945
dc.language.isospa
dc.publisherUniversidad de los Andes
dc.publisher.departmentDepartamento de Ciencias Biológicas
dc.publisher.facultyFacultad de Ciencias
dc.publisher.programMaestría en Ciencias Biológicas
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dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internationalen
dc.rights.accessrightsinfo:eu-repo/semantics/openAccess
dc.rights.coarhttp://purl.org/coar/access_right/c_abf2
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject.keywordRhamphichthyidae
dc.subject.keywordGymnotiformes
dc.subject.keywordIncrementos abruptos
dc.subject.keywordNovelty response
dc.subject.keywordYahuarcaca
dc.subject.keywordArroyos de tierra firme
dc.subject.keywordWeakly electric fish
dc.subject.keywordElectric organ discharges
dc.subject.keywordAmazonía
dc.subject.keywordTerra firme streams
dc.subject.themesBiologíaspa
dc.titleUn pez eléctrico débil que no descansa: Novelty response durante el reposo del pez habitante de la arena Gymnorhamphichthys rondoni en Leticia-Amazonasspa
dc.title.alternativeA weak electric fish that never rests: Novelty response during rest in the sand-dwelling fish Gymnorhamphichthys rondoni in Leticia, Amazonaseng
dc.typeTrabajo de grado - Maestría
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