Apistogramma pertensis
Contents:
- Pertensis
by Mayalauren/aol.com (Wed, 2 Sep 1998)
- damn pertensis!
by Mike & Diane Wise <apistowise/bewellnet.com> (Fri, 11 Sep 1998)
- damn pertensis!
by Marco Lacerda <marcolacerda/ax.apc.org> (Wed, 16 Sep 1998)
- unusual behavior
by Mike & Diane Wise <apistowise/bewellnet.com> (Mon, 10 Jan 2000)
- Polygamic A. pertensis !!?
by Fredrik Ljungberg <Fredrik.Ljungberg/saab.se> (Wed, 21 Mar 2001)
- Polygamic A. pertensis !!?
by Fredrik Ljungberg <Fredrik.Ljungberg/saab.se> (Wed, 21 Mar 2001)
by Mayalauren/aol.com
Date: Wed, 2 Sep 1998
To: apisto/majordomo.pobox.com
Hello all'
I did it! My first official apisto spawn. A. pertensis.
Right now she is herding a flock of about 50 fry.
This was my set up- 20 G long
Bogwood, swords,anubias,ambulia
Oak leaves,2 flower pots
5pH,30ppm,84'
Waters Of The World SA
I'm feeding frozen brine, bloodworms,mosquito larvae and blackworms
Also in the tank are a pair of Panduro (they are on the opposite end of the
tank) and
a trio of D. filamentosus. There has been no aggression- territories seem to
be well defined by the pieces of wood.
I had no idea she'd spawned, although she had been a little reclusive for a
few days.
I think I'm going to leave the fry with her, seeing it's her first, and see
what happens.
I'm so pleased I had to let you all know!!
Jason
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by Mike & Diane Wise <apistowise/bewellnet.com>
Date: Fri, 11 Sep 1998
To: apisto/majordomo.pobox.com
Mike Jacobs wrote:
> Boy am I with you here Jason.........I have been fighting this for about
> 5-6-7 months and I just don't trust the books. I know you guys have
> been giving this your all and I even wrote in the books the differences
> you guys gave me.....but it is hard to get these fish to slow down to
> count rows and I do not trust those books......the bork book is
> beautiful but they are not like any Apisto's I buy. Does anyone out
> there have some good valid pic's of these fish?
If you don't trust any of the books, then I guess the only "valid pic" you can trust
is the photo of the holotype in Haseman's 1911 paper! It's a nice photo (for a dead
fish) and the retouching was done well, too.
Seriously, the photos in Aqualog (p. 55 bottom row), Linke & Staeck (p. 107) are of
A. pertensis. The photo in Mayland & Borks's book (p. 105) and Richter's (p. 117)
look like they may be other populations (species?), possibly intermediate between A.
pertensis & A. meinkeni. The number of spot rows in the tail isn't necessarily as
important as the width of the spots vs. width of the interstitial area around them
and the placement of the rows (regular or irregular). Additionally, this is only one
minor feature used to ID this species. When in doubt call your fish A. cf. pertensis
(whatever that is).
Mike Wise
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by Marco Lacerda <marcolacerda/ax.apc.org>
Date: Wed, 16 Sep 1998
To: apisto/majordomo.pobox.com
Mike Jacobs wrote:
>
> Marco wrote...
> >I strongly recommend the original description of A. meinkeni by
> >Kullander, 1980: there is a black & white picture of a preserved
> >specimen,
>
> Great suggestion.....thanks.....where does one find these descriptions.
> Libraries.........the internet???
Dear Mike:
You can find it at a library.
Look for: "Bonner Zoologische Monographien, Nr. 14, 1980". This is
Kullander's paper containing A. meinkeni's original description, as well
as many other species.
I agree with what Mike Wise suggested, i.e., that A. pertensis is not a
single, but a complex of species. So many of the so-called A. pertensis-
populations, A. cf. pertensis, A. aff. pertensis or ditto for the A.
meinkeni in the hobby should represent distinct, closely related
species.
I've collected myself the real A. meinkeni (from type locality, the
village of Trovao at Rio Uaupes) and can tell you that the light
interspaces are always broader or equal in width to the dark bars, just
exactly as in Kullander's picture. I have preserved a few specimens (now
deposited at the NR Museum in Stockholm, where Kullander works) and have
a slide from this specimen (dead, after preservation in formaline, but
caudal fin pattern clearly visible).
The real A. pertensis, like Mike Wise said, is best referred to as
Haseman's photo/drawing.
It's a fish from Rio Negro.
I've collected some fishes like A. meinkeni, as the so-called A. cf.
meinkeni "Tefé", but it may represent another distinct, closely related
species. (I've shown a slide of this fish at last Apistogramma Study
Group lecture in St. Louis).
Cheers.
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by Mike & Diane Wise <apistowise/bewellnet.com>
Date: Mon, 10 Jan 2000
To: apisto/majordomo.pobox.com
Gary,
One of the interesting features of this group of apistos it that they are,
behaviorally, preferentially monogamous. I've had several species where the
female would only breed with one male. If he was removed breeding shut down. I
think that is one reason so many people have problems getting them to reproduce.
They buy a pair that turns out to be incompatible.
Mike Wise
Frauley/Elson wrote:
> Thomas Wilkinson wrote:
> >
> > Gary
> > I think these "piacoa" apistos are Pertensis group fish. From pictures I
> > sent to Mike Wise he thought they resembled A. sp. "Rio Maniopure" probably
> > related to A. " 4 stripe". I caught them near Piacoa, Venezuela near the
> > Orinoco Delta. I do not think thse fish have been described before.
> > Tom
> >
>
> Just to float a balloon - I think the pertensis type, slender-bodied
> apistos may be the least popular group. I see all sorts coming in to the
> local importer's, usually as mixers, but unlike mixers from other
> groups, they stay there. I'm as guilty of shying away from them as
> anyone, due to the questions of:
> a) water requirements
> b) colour...
> Tom's comments have me thinking -for those who do keep fish from this
> group, are there other behavioral diffferences between them and the
> regani and other groups that surround them. It may be an empty question,
> but with the experience on this list, it might be neat to see if a lot
> of dangling threads can be pulled together to give us all a look at a
> sometimes unappreciated group of Apistogramma.
> Gary
>
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by Fredrik Ljungberg <Fredrik.Ljungberg/saab.se>
Date: Wed, 21 Mar 2001
To: Apisto-l <apisto/listbox.com>
Perhaps not the weird behaviour dept but still a bit remarkable.
I have a trio of A. pertensis in a 150 litre-tank with some
tetras and a couple of A. paucisquamis. My pertensis has always
been monogamic even if I had more than a pair in a tank but
this trio isn't, or the male isn't. He spawned both females
within a week and is now helping both of them to protect their
fry from the tetras. Really nice to watch and I guess he takes
the chance when he can...
Has anyone seen this in what is generally accepted as monogamic
species?
There is some confusion regarding A. pertensis and I am not sure
that these are the true form even if they're very close. Does anyone
(Mike?) know where/if there is a photo of the real A. pertensis in
any book or online?
Regards,
Fredrik L.
--
Fredrik.Ljungberg@saab.se
Flutter and Loads Department, Saab Ab
voice +46 13 18 54 60, fax +46 13 18 33 63
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by Fredrik Ljungberg <Fredrik.Ljungberg/saab.se>
Date: Wed, 21 Mar 2001
To: apisto/listbox.com
I was quite certain that I had A. pertensis but I spoke with Dr. Sven
Kullander two years ago and he thought the subject was tricky. I
interpreted
that as if it wasn't so easy to tell A. pertensis from other similar
species
as I had thought. Like you say Mike, it is probably just normal
variations
within a species and not enought to warrant separation.
/Fredrik
>
> A. pertensis is a fairly easy species to identify. The main problem most
> people have with this species is the variability in the number of rows of
> spots on the tail fin. The holotype shows a fish with only 5 or 6 rows. There
> are photos of fish with 10 or more rows. This has confused hobbyists in the
> past. Are these different species? Probably not. It appears that the number
> of spot rows increase with the size of the fish to some extent. The male A.
> pertensis in Linke & Staeck matches the holotype quite closely. So do most of
> the photos listed as "A. pertensis" in the Aqualog book (p.55). The form
> labeled "A. cf. pertensis" on the same page appears to be a different form
> (species?). It is more elongate, with longer extensions on the dorsal, anal,
> and ventral fins. The caudal fin appears to be longer, too. Could these only
> be extremely old aquarium specimens of A. pertensis? I'm not sure.
>
> Mike Wise
>
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