The text is discussing possible ways to control large and uncontrollable population of cane toad which is a big threat for small native animals in Australia, and provides some reasons to support claimed possible ways. On the other hand, the professor provides contradicting reasons and says why she is against claimed reasons of the text.
First, the text claims that by using a native fence which blocks and limits the spread of cane toad to whole Australia we can control their population and spread, and explains that because this method was useful when first used in twentieth century, can be practical now too. The professor refutes this claim, and says that some of young cane toad and those of them which are still as egg, can be spread by rivers and streams and establish a new colony where ever the water may carry them. She states that we cannot limit all rivers and streams, and that is why we cannot block the population of these species by using national fence.
Second, the text states that we can ask volunteers to capture cane toads and because they can be found easily, volunteers can do this and if the government set a group of volunteers to do this act, we can easily control the population of cane toad. The professor goes against this claim and says that this method could be practical but volunteers may destroy native species of the Australia, and if we use this method, one specific frog which is really like cane toad, especially when it is young, will be in a big danger.
Third, the text claims that scientists by spreading a disease-causing virus can control the number of cane toad and although this virus may infect some other spices like reptile and amphibian, but will not harm them, and is a safe method for controlling cane toad. The professor casts doubt on this point and rejects it by saying that this idea is really bad, and will have bad consequences in habitats of these species. She also states that reptiles and amphibians which are native animals of South America are transported to other areas and if they reach to south America, can destroy native population of these species.
The
text
is discussing possible ways to
control
large and uncontrollable
population
of
cane
toad
which is a
big
threat for
small
native
animals in Australia, and provides
some
reasons to support claimed possible ways.
On the other hand
, the
professor
provides contradicting reasons and says why she is against claimed reasons of the text.
First
, the
text
claims
that by using a
native
fence which blocks and limits the spread of
cane
toad
to whole Australia we can
control
their
population
and spread, and
explains
that
because
this
method
was useful when
first
used
in twentieth century, can be practical
now
too. The
professor
refutes this
claim
, and says that
some of young
cane
toad
and those of them which are
still
as egg, can
be spread
by rivers and streams and establish a new colony where ever the water may carry them. She states that we cannot limit all rivers and streams, and
that is
why we cannot block the
population
of these species by using national fence.
Second, the
text
states that we can ask
volunteers
to capture
cane
toads
and
because
they can
be found
easily
,
volunteers
can do this and if the
government
set a group of
volunteers
to do this act, we can
easily
control
the
population
of
cane
toad
. The
professor
goes against this
claim
and says that this
method
could be practical
but
volunteers
may
destroy
native
species of the Australia, and if we
use
this
method
, one specific frog which is
really
like
cane
toad
,
especially
when it is young, will be in a
big
danger
.
Third, the
text
claims
that scientists by spreading a disease-causing virus can
control
the number of
cane
toad
and although this virus may infect
some
other spices like reptile and amphibian,
but
will not harm them, and is a safe
method
for controlling
cane
toad
. The
professor
casts doubt on this point and rejects it by saying that this
idea
is
really
bad
, and will have
bad
consequences in habitats of these species. She
also
states that reptiles and amphibians which are
native
animals of South America
are transported
to other areas and if they reach to
south America
, can
destroy
native
population
of these species.