by Bob Yirka , Phys.org
A team of researchers from
the Danube Research Institute and the National Agricultural Research and
Innovation Centre, both in Hungary, and Estación Biológica de Doñana, Consejo
Superior de Investigaciones Científicas in Spain reports that is it possible
for fish eggs to survive the trip through the bird digestive tract and
subsequently to hatch. In their paper published in Proceedings of the
National Academy of Sciences, the group describes their experiments with birds
and fish eggs and what they found.
Fish have been found
swimming in extremely isolated lakes over the years, raising the question of
how they got there. Prior research has shown that most such fish are
related to fish in other less isolated areas, which suggests that fish in
isolated places must have somehow migrated there. Scientists have suggested
that the most obvious explanation for such migration is fish eggs being
consumed by birds who carry them in
their digestive tracts and then deposit them in a new locale when they
defecate. Surprisingly, no one has thought to test this theory until now.
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