{"ok":true,"nota":{"id":"0b46bb08217419e1","slug":"un-pez-fosil-y-su-dieta-dejan-marcas-en-los-dientes-que-ahora-se-puede-0b46bb","titulo":"Un pez fósil y su dieta dejan marcas en los dientes que ahora se pueden leer","resumen":"Investigadores alimentaron con distintas dietas a ejemplares de Polypterus senegalus, un pez africano, para ver cómo se desgastan sus dientes. Los experimentos vinculan el tipo de comida con las marcas que quedan en la dentición.","fuente":"biorxiv","fuenteNombre":"bioRxiv · preprints","color":"#be2628","autor":"Kubo, T., Wibisana, J. N., Sallan, R. A., Sallan, L.","url":"https://www.biorxiv.org/content/10.64898/2026.11.01.763519v1?rss=1","imagen":"/hoy/portada/0b46bb08217419e1","tema":"ciencia","subtemas":["paleontología","dientes de peces","dieta","desgaste dental","fósiles"],"entidades":["bioRxiv","Polypterus senegalus"],"formato":"dato","entretenimiento":false,"pubTs":"2026-11-04T00:00:00.000Z","indexTs":"2026-11-04T15:03:55.989Z","hash":"08cc767b31f79442506cbf5ea083025691b53a92f6ad42573963b39d364cc9c7","tsa":{"time":"Nov  4 15:04:12 2026 GMT","provider":"freetsa.org","sobre":"sello"},"stats":{"views":0,"likes":0,"clicks":0,"dwell":0},"tipo":"normal","registro":"hallazgo","porQueImporta":"Hasta ahora casi no había experimentos que relacionaran la comida de los peces con el desgaste de sus dientes, lo que limitaba la lectura de fósiles. Con estos resultados, los paleontólogos pueden inferir mejor qué comía un pez extinto mirando sus dientes. Para quien se interesa por la historia natural, es una herramienta que reconstruye vidas de hace millones de años con evidencia más firme.","quienFirma":"Preprint en bioRxiv (institución no identificada en el resumen)","confianza":"preprint","consulta":null},"sello":{"hash":"08cc767b31f79442506cbf5ea083025691b53a92f6ad42573963b39d364cc9c7","sello":"3e52591d8d57709842e94217e6304ca56d403cc544b162013263346ed400cb1d","beacon":{"drand":{"cadena":"8990e7a9aaed2ffed73dbd7092123d6f289930540d7651336225dc172e51b2ce","ronda":6612454,"aleatorio":"6765cebb44ce9ba2d5db6ec8cc4f7a478c5ab98e56c7be27926dd04beba44f97","tiempo":"2026-11-04T15:04:00.000Z"},"nist":{"cadena":2,"pulso":2013160,"salida":"8B5ACCF0E080B2D91C345685D1ECBFC32D5366084025A307698F2975985CED0557A2F4C6AFA0E6D2AD76A3807DBA9EAD84F13D3C62B36643891796AC13558A65","tiempo":"2026-11-04T15:02:00.000Z"},"noAntes":"2026-11-04T15:04:00.000Z"},"verificacion":{"drand":true,"nist":true},"tsa":{"time":"Nov  4 15:04:12 2026 GMT","provider":"freetsa.org","sobre":"sello"},"original":{"titulo":"Feeding experiments with Senegal bichir Polypterus senegalus provide evidence for diet-related tooth damage and dental microwear","descripcion":"Dental microwear is a useful tool for reconstructing jaw movements and diet in toothed vertebrates, but its application to fishes (Actinopterygii and Chondrichthyes) remains limited. This is partly due to the lack of experiments directly linking diet and microwear in these groups; only one highly-derived teleost (Actinopterygii, or ray-finned fishes) species of recent origins, the three-spined stickleback Gasterosteus aculeatus, has been subject to controlled feeding experiments. As sticklebacks are suction or ram feeders that live on macroplankton and insect larvae and do not use their dentitions for prey processing, the absence of experimental data from other fish species limits our abilit","pubDate":"2026-11-04","url":"https://www.biorxiv.org/content/10.64898/2026.11.01.763519v1?rss=1"},"indexado":"2026-11-04T15:03:55.989Z"}}