for more than 40 years marine biologist Samuel Gruber has been researching the
Samuel Gruber has been researching the
Samuel Gruber has been researching the behavior of lemon sharks but he’s never
behavior of lemon sharks but he’s never
behavior of lemon sharks but he’s never seen anything like this dozens of them
seen anything like this dozens of them
seen anything like this dozens of them huddled together on the bottom here off
huddled together on the bottom here off
huddled together on the bottom here off the coast of Jupiter Florida he’s about
the coast of Jupiter Florida he’s about
the coast of Jupiter Florida he’s about to dive 80 feet below to find out why
to dive 80 feet below to find out why
to dive 80 feet below to find out why the water is murky as Gruber gets deeper
the water is murky as Gruber gets deeper
the water is murky as Gruber gets deeper it’s clear he’s not alone a school of
it’s clear he’s not alone a school of
it’s clear he’s not alone a school of more than three dozen adult lemon sharks
more than three dozen adult lemon sharks
more than three dozen adult lemon sharks ready and waiting summer as long as ten
ready and waiting summer as long as ten
ready and waiting summer as long as ten feet an awesome sight but it doesn’t
feet an awesome sight but it doesn’t
feet an awesome sight but it doesn’t stop Gruber from getting close enough to
stop Gruber from getting close enough to
stop Gruber from getting close enough to touch them what are so many sharks doing
touch them what are so many sharks doing
touch them what are so many sharks doing in the same place at the same time he
in the same place at the same time he
in the same place at the same time he believes the Predators are displaying
believes the Predators are displaying
believes the Predators are displaying what he calls refuge een behavior
what he calls refuge een behavior
what he calls refuge een behavior they’re out and about when the sun goes
they’re out and about when the sun goes
they’re out and about when the sun goes down there out feeding moving around and
down there out feeding moving around and
down there out feeding moving around and when the Sun comes up they begin to go
when the Sun comes up they begin to go
when the Sun comes up they begin to go to this particular place where they can
to this particular place where they can
to this particular place where they can assemble and rest on the bottom now
assemble and rest on the bottom now
assemble and rest on the bottom now resting on this bottom gives them a
resting on this bottom gives them a
resting on this bottom gives them a little bit of an energetic edge in the
little bit of an energetic edge in the
little bit of an energetic edge in the sense that they can face up into the
sense that they can face up into the
sense that they can face up into the current and they don’t have to swim
but there may be more to it than resting
but there may be more to it than resting lemon sharks are social animals and
lemon sharks are social animals and
lemon sharks are social animals and sometimes school in small groups this
sometimes school in small groups this
sometimes school in small groups this might also be a sort of mating game the
might also be a sort of mating game the
might also be a sort of mating game the females are assembling here in order to
females are assembling here in order to
females are assembling here in order to attract males that’s what I think is
attract males that’s what I think is
attract males that’s what I think is going on here and the way it works I
going on here and the way it works I
going on here and the way it works I think is that early in december a group
think is that early in december a group
think is that early in december a group of females who know to come here because
of females who know to come here because
of females who know to come here because they’ve done it year after year will
they’ve done it year after year will
they’ve done it year after year will assemble at this Gruber suspects female
assemble at this Gruber suspects female
assemble at this Gruber suspects female lemon sharks have chosen this reef as a
lemon sharks have chosen this reef as a
lemon sharks have chosen this reef as a place for producing chemical signals
place for producing chemical signals
place for producing chemical signals called pheromones the pheromones are
called pheromones the pheromones are
called pheromones the pheromones are carried by the currents and they attract
carried by the currents and they attract
carried by the currents and they attract potential male suitors and then it’s on
potential male suitors and then it’s on
potential male suitors and then it’s on to the domestic phase when this group
to the domestic phase when this group
to the domestic phase when this group reaches a critical mass say around March
reaches a critical mass say around March
reaches a critical mass say around March or februari March they begin to move out
or februari March they begin to move out
or februari March they begin to move out and they move into the lagoon from
and they move into the lagoon from
and they move into the lagoon from mating and and birthing which takes
mating and and birthing which takes
mating and and birthing which takes place in April’s
and if Gruber’s hunch is right he can
and if Gruber’s hunch is right he can expect another miracle soon when these
expect another miracle soon when these
expect another miracle soon when these creatures bring a new generation of
creatures bring a new generation of
creatures bring a new generation of lemon sharks into the ocean
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