Biologia
Las imágenes del "tiburón prehistórico"
(véase Evolucionarios) que invadió ayer los medios de comunicación son impactantes, pero no tanto por los rasgos arcaicos del animal (que en algunas fotos parece diseñado por
Giger), sino porque el pobre estaba agonizando y nadaba jorobado y desorientado, como un
zombie.
El éxito de la noticia se debió en gran parte a la idea popular de primitivismo, asociada psicológicamente con la monstruosidad, la lentitud, la torpeza, la ineficacia y la extinción.
La noticia que Reuters sirvió a diversos medios contiene la siguiente afirmación:
"...apenas ha evolucionado desde la prehistoria"
Lo cual no debería sorprender, porque nosotros tampoco hemos evolucionado apenas desde la prehistoria. Ni nosotros, ni la inmensa mayoría de los animales salvajes que conocemos han evolucionado apenas desde la prehistoria. La prehistoria fue ayer mismo, hombre. El género
Chlamydoselachus (al que pertenece la especie actual
Chlamydoselachus anguineus) tiene al menos 80 millones de años (Cretácico superior). No es informativo hablar de prehistoria (que acabó hace tan solo 3.500 años) en estos casos.
(Esto me recuerda, por cierto, a
aquella rana de la que se dijo que sus antepasados convivieron con los dinosaurios... vamos, lo mismo que los antepasados de todo el mundo).
"
Encontraron un tiburón prehistórico con vida" -dice
La Nación- "
aunque murió a pocas horas de ser capturado". Uno piensa ¡Vaya! ¡Qué mala suerte morirse justo ahora que lo descubren, después de llevar tantos siglos vivo! Justo después, los de la La Nación insultan al pobre tiburón llamándolo "mamífero":
(Gracias a Pablo por avisarme). Esta confusión es bastante frecuente, de todas formas. ¿Por qué ser produce? Mi hipótesis es que el concepto de mamífero acuático se traslada desde los cetáceos hasta los tiburones. O sea: uno sabe, porque se lo aprendió de pequeño, que hay mamíferos marinos que parecen peces, pero no tiene clara la diferencia entre un tiburón y un delfín, así que la cosa se lía en su cabeza. En este caso concreto, la exhibición de protuberantes agallas de pez del
Chlamydoselachus no puede ser más palmaria.
2007-01-25 | Haz un comentario (hay 91)
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| De: Anónimo |
Fecha: 2010-06-03 00:16 |
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