Prosanta Chakrabarty: Clues to prehistoric times, found in blind cavefish
Prosanta Chakrabarty: Blinde holenvissen leren ons iets over prehistorische tijden
Prosanta Chakrabarty studies fish to help explain the evolution of human beings and our planet. Full bio
Double-click the English transcript below to play the video.
"you only live once,"
'you only live once',
what I always dreamt of doing:
wat ik altijd al heb willen doen:
en nieuwe soorten ontdekken.
and discovering new species.
on caves for finding new species.
naar nieuwe soorten in grotten.
cavefish species out there.
holenvissen zijn te vinden
a lot about biology and geology.
over biologie en geologie.
around them have changed and moved
om hen heen veranderden en verschoven
the evolution of sight, by being blind.
doordat ze blind zijn.
that are essentially the same as ours.
dezelfde ogen als wij.
a fish species starts to adapt
als een vis zich begint aan te passen
they lose their eyes and their eyesight
hun ogen en zicht verliezen
cavefish like this one here.
holenvis als deze hier.
has evolved in a slightly different way,
een beetje anders geëvolueerd
and biological story to tell us,
geologisch en biologisch verhaal.
when we find a new species.
van een nieuwe soort zo boeiend.
we described, from southern Indiana.
uit het zuiden van Indiana.
the Hoosier cavefish.
de Hoosier holenvis.
are cavefishes in Kentucky,
zijn holenvissen uit Kentucky
toen de Ohiorivier
when the Ohio River split them
jaren geleden scheidde.
these subtle differences
de subtiele verschillen
behind their blindness.
achter hun blindheid.
that's super-critical for sight.
superbelangrijk voor het zien.
all function in that gene,
ging de werking verloren
natural experiment
natuurlijk experiment op
behind our vision,
naar de genen van ons zicht
about deep geological time,
over de diepe geologische tijd,
than in this species here.
dan bij deze soort hier.
we described from Madagascar
die we hebben beschreven
in het Malagassisch
to collect this species.
toen we dit specimen inzamelden.
full of dead things
vol dode dingen
be doing with your life,
in je leven,
that it tried to kill us,
ondanks dat ze ons probeerde te doden,
this species in Madagascar,
are 6,000 kilometers away,
freshwater cavefish
zoetwaterholenvis
de Indische Oceaan overzwemmen,
the DNA of these species
door hun DNA te vergelijken,
for more than 100 million years,
jaren van elkaar werden gescheiden,
continents were last together.
continenten nog samen waren.
didn't move at all.
these ancient geological events.
ervan te bepalen.
to tell you its name yet,
nog niet mag vertellen,
it's a new species from Mexico,
dat ze uit Mexico komt
the only known cave system it's from
het enige grottensysteem waar ze voorkwam
van een naburige dam.
bron van drinkwater.
this species' closest relative, yet.
de nauwste verwant nog niet.
anything else in Mexico,
dat ze niet voorkomt in Mexico,
something new about the geology
over de geologie
of how to better diagnose
van het beter diagnosticeren
before it goes extinct too.
vooraleer ze ook uitsterft.
trying to discover and save
kleine blinde holenvissen
about the geology of the planet
over de geologie van onze planeet
ABOUT THE SPEAKER
Prosanta Chakrabarty - IchthyologistProsanta Chakrabarty studies fish to help explain the evolution of human beings and our planet.
Why you should listen
Dr. Prosanta Chakrabarty is an Associate Professor and Curator of Fishes at the Museum of Natural Science and Department of Biological Science at Louisiana State University.
Chakrabarty is a systematist and an ichthyologist studying the evolution and biogeography of both freshwater and marine fishes. His work includes studies of Neotropical (Central and South America, Caribbean) and Indo-West Pacific (Indian and Western Pacific Ocean) fishes. His natural history collecting efforts include trips to Japan, Australia, Taiwan, Madagascar, Panama, Kuwait and many other countries. He has discovered over a dozen new species including new anglerfishes and cavefishes.
The LSU Museum of Natural Science fish collection that Chakrabarty oversees includes nearly half a million fish specimens and nearly 10,000 DNA samples covering most major groups of fishes. He earned his PhD at the University of Michigan and his undergraduate degree is from McGill University in Montreal. He has written two books including A Guide to Academia: Getting into and Surviving Grad School, Postdocs and a Research Job. He is also a former Program Director at the National Science Foundation. He was named a TED Fellow in 2016 and a TED Senior Fellow in 2018.
Prosanta Chakrabarty | Speaker | TED.com