Did you know you can train a
fish? It’s true! Like our marine mammals, many fish at the Aquarium have been
trained to target, touching a body part, like their snout, to a particular
object. Targeting helps lead animals to where we want or orientate them to a
specific area. For fish, a lot of targeting behaviors center around feeding.
And one of these well-trained fish lives on the Aquarium’s second floor!
Asian arowana
The Asian arowana, aka dragonfish, is a
beautiful red and gold-colored fish located in our Ancient Fishes exhibit. With
lots of animals in this exhibit, it’s important to know that everyone has a
chance to eat. Fortunately, our arowana has a “fin up” on the competition — he’s
target trained! Having traveled from the Toledo Zoo many years ago, it’s an old pro
at this behavior by now. By associating one particular object with food, the
arowana will swim over and get something to eat when it spots that object.
Behind the scenes view
To start the feeding process,
a large blue and white circle is lowered and hung off the side of the exhibit.
This highly contrasted color combination helps the arowana see it against
the background of the exhibit. Once the target is located by the arowana, it
knows that it’s time to eat. The fish will swim over to the target, touch its
snout to the circle (or at least get close), and then is quickly rewarded with
a shrimp or small fish.
Feeding target
Just as the arowana learned
how to target, there are some others that have figured it out! It’s not the
only fish that swims over when the target goes in the water. A couple of
exhibit-mates, including a lung fish, can be seen hanging around trying to
steal a morsel. But the aquarists are careful to try and feed only the arowana
with this target, ensuring that gets its particular food selection.
Right behavior, wrong fish species
This type of feeding might
seem like a lot of work for one fish. However, it’s really important for the
overall health of the exhibit. It ensures that the arowana gets enough food
specifically for it and allows the aquarist to get a good close at how it’s
doing. Target feeding also
helps alleviate competition during feedings. The arowana is a fast fishy
predator, while some other fish on exhibit are a bit slower. By feeding the
fish in this way, arowana only associates the target with food. No target
= no food for the arowana and let’s the other animals have a chance to eat.
It’s such a successful feeding strategy that we do this with other animals at
the Aquarium, including sea turtles and different fish species in the Giant
Ocean Tank!
Feeding and getting footage is tricky!
To see the target feeding
from a visitor’s point of view, check out the video below! You’ll be able to
see the arowana swim up to the blue circle. Once it swims close, Jeremy, one of
our head aquarists, quickly lowers in a fish or shrimp and then it’s snack
time! Next time you come in to visit, check out the Ancient Fishes exhibit and
our extraordinary Asian arowana. If you see a blue circle in the exhibit,
it may mean lunch isn’t too far behind.
0 comments:
Post a Comment