|
The Dollar Sunfish (Lepomis marginatus) as an Aquarium Species
by Robert Rice
Hiding in the back waters, swamps and small ponds of the Southeast is a
seldom seen gem that is so beautiful , so pleasant to keep that it puts many
tropicals to shame. It's behavior in captivity and ease of care are worthy of
an entire book not just an article. It's life colors and habit remain
basically ignored by the various professionals who have come across this
shining star. It's size or lack of it (under 5 inches) relegate it to bait
status and thus it is totally forgotten by the local sportsmen. With this
ignorance comes apathy and sadly it is, quietly disappearing from it's
traditional homes. The victim of our increasing pressure on the
environment.
Who is this you wonder, some unusual fringe species ? Some really cool
orchid ? A hard to please environmental elitist? Nope this fella is the
Dollar Sunfish one of the hardiest guys you will ever come across! I have yet
to find a true species definition, the standard definition is see Longear
description as they are so similar in appearance. My observations are as
follows, the Male Dollar sunfish is a bluish hue with light colored
vermiculations across the face, gill plates, and lips. The eyes can be
encircled with colors ranging from red to white. Maximum size 5 inches
typical size 4 or less. They display sexual dimorphism in the typical Sunfish
manner. The males being more colorful and aggressive than the females. They
are predacious feeding on insects and small fish. There is an extreme amount
of color variation from location to location which leads me to suspect that
the species possesses plastic genes. For the aquarist this is a terrific
bonus, the chance to develop new color strains is always exciting!
Collecting this species is the most time consuming and difficult problem
that the Aquarist must tackle. For those outside of it's native range (
Eastern Texas east to the Atlantic and South of Central Oklahoma) I recommend
trading with Aquarist who already possess and are breeding the species. For
starters I'd recommend that you check into the North American Native Fish
Association which regularly posts a trading post section in it's publications
or the North American Native Fish Echo (NANFE) on the fido net which has
become an electronic gathering place for those of us who keep and enjoy
Native Fish. NANFE has become the quickest place for people to negotiate
their trades. Which ever is convenient for you I recommend you check them out
first.
For those of you within the Dollar Sunfishes Range who are bound and
determined to collect a local strain, get a dip net, a fishing license and
some waders because this little guy hides in some of the murkiest , weediest
off the beaten path places you will ever collect in. I've found them commonly
in back washes, ox bows and swamps. You might as well accept the fact that
you are gonna get sweaty , muddy and bitten by something before it is all
done. Of course for me , that is the major part of the fun, for you it may
not be. After I collect sunfish specimens there is a small problem with field
identification. In areas where the Dollar Sunfish and the Longear Sunfish
overlap you sometimes find juveniles of both species very hard to tell
apart. I have found the simplest solution is to take home a few and study
them at the house. You will find with a little time and effort proper
identification will come to you. As the specimens grow the differences will
become clearer. You can then release unwanted specimens back to their homes
with no harm done.
Once in the Aquarium they are a joy to keep They take a variety of foods
without a problem. I feed mine frozen crawfish, raw oysters and a mix of
worms and other live insects when available. They adapt very quickly to
domestic life, they are not even a little shy as long as there is sufficient
structure to make them comfortable.. Within a week you can expect to see
typical Dollar Sunfish behaviors. The males will begin to establish a
hierarchy for everything from feeding to breeding. The females will float
between territories with little ill effects. One of the most pleasant things
about the Dollar Sunfish is that it's small mouth allows you to keep a
variety of darters, shiners and Madtoms in a community atmosphere. So instead
of relegating your sunfish to single species tank in a back room you can put
them up front in the main display tank and not worry about your latest catch
becoming a sushi bar!
For the Aquarist serious about breeding these fella's I have a tip, get an
outdoor pond! I know many people who have successfully bred the Dollar
Sunfish in an outdoor pond , but only a handful who have had similar success
in an aquarium. They seem to be the perfect species for a small outdoor
pond. They are aggressive insectivores, very tolerant of water conditions and
extremely tolerant of temperature extremes. I have been fortunate enough to
have observed a successful spawn in one of my tanks and can add the following
observations. The Dollar Sunfish needs a chilling period to induce a spawn,
like many temperate species without a season of cold (-60 F) the females just
don't become gravid. They seem to be continual spawners when finally induced
to spawn, at a temperature of 74 F my specimens spawned regularly for over a
month until the tank temperature reached 80 F. Then suddenly the spawning
ceased. During that time they ate HUGE amounts of foods of all types with
relish.
If there ever was the classic example of a species that needs the Aquarist
help the Dollar Sunfish is that species. He has no advocate anywhere except
a few of us collectors. We have collected and kept him for generations
trying to learn as much as we can about this little jewel, with the hope we
can contribute to it's continued survival. Those same collectors are many
times not taken seriously by either our local Department of Natural Resources
personnel or the local Aquarist we meet. We who know the species best are
allowed to contribute the least. I believe that now is a time for change, a
time for action. Imagine if a local Southeastern Aquarium Club in Atlanta for
example, decided they were going to get involved in keeping, rearing, and
studying the Dollar Sunfish. Keeping detailed notes on collection sites and
breeding behaviors. With the sheer number of members and the added influx of
time and resources they would make huge impact ! Detailed collection and
breeding data would prove invaluable and even more the public awareness could
be priceless. When someone said habitat for Dollar Sunfish was threatened
people would care, people would react.
This species is very well suited to the Aquarium and has been ignored for
so long that he has practically disappeared from many texts. That is a
mistake. We as Aquarist can do more to put these species back on the map. As
you can tell I really enjoy the Dollar Sunfish and a great many more of our
native fishes. If you seek more information about native fishes I recommend
you check out the following resources NANFA (see side bar) , Petersons Field
guide to North American natives by Larry Page and Brooks M. Burr or a Our
Native Fishes by John Quinn are excellent resources for the Aquarist who
wants to learn and do more for our Native Fishes. You can also reach me at
RobertRice@juno.com or 2213 Prytania Circle, Navarre, Florida 32566
Copyright © 1991 - 2008 Ascot International
|