Anatomía ocular en las serpientes dipsadinas (Colubridae, Dipsadinae) y su relación con algunos aspectos de historia natural

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dc.contributor.advisorRocío Jerez Adriana, Adriana Jerez
dc.contributor.advisorAkcali Christopher Kemal, Christopher K. Akcali
dc.contributor.authorBravo Gómez Juan Felipe
dc.date.accessioned2026-01-28T16:03:25Z
dc.date.available2026-01-28T16:03:25Z
dc.date.issued2025
dc.descriptionIlustraciones, gráficosspa
dc.description.abstractEl ojo de las serpientes presenta un plan anatómico general compartido con otros vertebrados, pero exhibe modificaciones que reflejan su historia evolutiva y ecológica. La variación en el tamaño del ojo, la escama ocular, la córnea, la lente y la retina se ha asociado con aspectos de historia natural, particularmente el hábitat y la actividad. Sin embargo, esto ha sido poco explorado en la subfamilia Dipsadinae (Colubridae), un linaje diverso y ecológicamente heterogéneo del Neotrópico. Desde esta perspectiva, el objetivo de este trabajo fue analizar la variación anatómica del ojo en serpientes dipsadinas y evaluar su relación con el hábitat y la actividad mediante enfoques anatómicos y comparados evolutivos. Se realizaron descripciones histológicas y análisis morfométricos de rasgos oculares en un conjunto representativo de especies de Dipsadinae, integrados con información de historia natural y filogenética. Estos datos fueron analizados mediante reconstrucciones de estados ancestrales, estimaciones de señal filogenética y análisis estadísticos comparados. Los resultados muestran que, aunque las serpientes dipsadinas comparten un plan anatómico ocular general, existen variaciones en el tamaño del ojo y en la configuración de estructuras internas asociadas con el uso del hábitat y la actividad. A pesar de la presencia de señal filogenética en algunos rasgos, el ambiente emerge como un factor clave en la diversificación fenotípica del ojo. En conjunto, este estudio resalta el papel del ambiente en la evolución del sistema visual y la importancia de integrar aproximaciones anatómicas, ecológicas y evolutivas para comprender la diversidad morfológica en serpientes y otros reptiles escamados. (Texto tomado de la fuente)spa
dc.description.abstractThe eye of snakes exhibits a general anatomical plan shared with other vertebrates, yet it shows modifications that reflect their evolutionary and ecological history. Variation in eye size, as well as in the spectacle, cornea, lens, and retina, has been associated with aspects of natural history, particularly habitat and activity. However, these patterns have been little explored in the subfamily Dipsadinae (Colubridae), a diverse and ecologically heterogeneous lineage from the Neotropics. In this context, the aim of this study was to analyze anatomical variation in the eye of dipsadine snakes and to evaluate its relationship with habitat and activity using anatomical and evolutionary comparative approaches. Histological descriptions and morphometric analyses of ocular traits were conducted in a representative set of Dipsadinae species and integrated with natural history and phylogenetic information. These data were analyzed using ancestral state reconstructions, estimates of phylogenetic signal, and comparative statistical analyses. The results show that, although dipsadine snakes share a general ocular anatomical plan, variation in eye size and in the configuration of internal structures is associated with habitat use and activity. Despite the presence of phylogenetic signal in some traits, the environment emerges as a key factor in the phenotypic diversification of the eye. Overall, this study highlights the role of the environment in the evolution of the visual system and the importance of integrating anatomical, ecological, and evolutionary approaches to understand morphological diversity in snakes and other squamate reptiles.eng
dc.description.degreelevelMaestría
dc.description.degreenameMagister en Ciencias-Biología
dc.format.extent[75 páginas]
dc.format.mimetypeapplication/pdf
dc.identifier.instnameUniversidad Nacional de Colombiaspa
dc.identifier.reponameRepositorio Institucional Universidad Nacional de Colombiaspa
dc.identifier.repourlhttps://repositorio.unal.edu.co/spa
dc.identifier.urihttps://repositorio.unal.edu.co/handle/unal/89342
dc.language.isospa
dc.publisherUniversidad Nacional de Colombia
dc.publisher.branchUniversidad Nacional de Colombia - Sede Bogotá
dc.publisher.facultyFacultad de Ciencias
dc.publisher.placeBogotá, Colombia
dc.publisher.programBogotá - Ciencias - Maestría en Ciencias - Biología
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dc.rights.accessrightsinfo:eu-repo/semantics/openAccess
dc.rights.licenseReconocimiento 4.0 Internacional
dc.subject.ddc570 - Biología
dc.subject.lembSerpientesspa
dc.subject.lembSnakeseng
dc.subject.lembHerpetologíaspa
dc.subject.lembHerpetologyeng
dc.subject.lembFilogeniaspa
dc.subject.lembPhylogenyeng
dc.subject.proposalGlobo ocularspa
dc.subject.proposalDiversificación morfológicaspa
dc.subject.proposalMorphological diversificationspa
dc.subject.proposalPhenotypic evolutioneng
dc.subject.proposalSquamataeng
dc.subject.proposalEvolución fenotípicaspa
dc.subject.proposalMorphological diversificationspa
dc.subject.proposalMorphological diversificationeng
dc.subject.proposalPhenotypic evolutioneng
dc.subject.proposalSquamataeng
dc.subject.wikidataDipsadinaespa
dc.titleAnatomía ocular en las serpientes dipsadinas (Colubridae, Dipsadinae) y su relación con algunos aspectos de historia naturalspa
dc.title.translatedOcular anatomy in dipsadine snakes and Its relationship to aspects of their natural historyeng
dc.typeTrabajo de grado - Maestría
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Maestría en Ciencias - Biología