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A New Species of Livebearer - A Fish You Know Already Know

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By unclescott
from the uncle scott department, Section News
Posted on Wed Aug 29, 2007 at 12:32:13 PM PST
Tags: (all tags)
Livebearers, the Bulletin of the American Livebearer Association, number 189, arrived a few days ago. They ran an article by Fred Poeser and Michael Kempkes. Both work at universities and have access to collections of South American fishes. Both men have speculated upon the status of the Endler's livebearer as a species separate from guppies. A couple of others, who have considered describing the Endler's livebearer, they felt, seem to have abandoned the project.



Poeser found some museum specimens of "guppies" which more favored the Endler's strains than the other guppy strains, Acknowledging that aquarium strains of the two groups of "guppies" could freely interbreed, Poeser and Kempkes wondered if behavior patterns and location in the wild would keep them from doing that. Correspondence with others was not particularly productive.

The upshot of their discussion was that they flew from Europe to Venezuela. Rather than go to the Cumana area (where Endler found them) they opted to go several 100 miles to the east and collect what turned out to be several locations of regular guppies and what they felt was a strain of Endler's or fish with "the Endler comma" on their sides, in the Campoma lagoon, near the city of Carupano.  Their strain had that Endler's reflective characteristic, but were quite different from the guppy patterns and other Endler's in coloration.

The behavior of their fish was quite different from that of the guppies, with whom they did not mingle. Guppy males tend to court, copulate with and leave females. Their male Endler's gather a harem and stay with them. The little Endler's shoals also tended to swim nearer to cichlids than the guppies and, while they were being observed, not to be attacked by the cichlids! The Endler males, in the day observed, never attempted a "sneak spawning", nor did they compete with one another for the attention of a female.  The Endler's types also seemed to be true to a certain territory and stay near or in it.

It is too easy to anthropomorphosize fish usually. But by aquarists" standards, the Endler's males may be "gentlemen" compared to the guppy males. ;)

They described them as of Poecilia (Acanthophacelus) wingei. The name in parentheses is the subgenus guppies have been placed in. P. wingei now joins Poecilia reticulata as members of the subgenus Acanthophacelus. The person it is named for was a Danish geneticist who evidently did quite a bit for his field.

 There will be other field and laboratory studies of behavior. DNA will be looked at again. I have no idea whether the scientific community will agree with the gentlemen mentioned above and below, in the description. I will have to get over to a local university and see if I can find it.

I'm still going to call them Endler's. In fact, a box of Endler's will be going out this afternoon, if I get off of the computer.

But you should be aware that they are also being called P. wingei. It probably is only a matter of time before someone lists P. wingei on Aquabid for a whole lot of money. ;)

Ah! One auction lists them by both names. To the credit of the person listing, the bidding starts low and he/she doesn't seem to be trying to snooker bidders. Applause for them!

I don't want to actively bootleg that ALA article, but if a few people want a copy, I can scan it (early next week) and e-mail it to them. Please e-mail me off-list and be a bit patient. Include Article in the e-mail heading so I see it right away. ;)

All the best!
uncle scott

References:

Poeser, F. N., M. Kempkes, and I. J. H. Isbrucker, 2005. Description of Poecilia (Acanthophacelus) wingei n.sp.from the Paria Peninsula, Venezuela, including notes on Acanthophacelus Eigenmann, 1907 and other subgenera of Poecilia Bloch and Sclineider, 1801
(Teleostei, Cyprino-dontifonnes, Poeciliidae). Contributions to Zoology 74 (1/2): 97-115.

Proeser, Fred N. and Michael Kempkes. Poecilia (Acanthophacelus) wingei, A True Caribbean Gem. Livebearers #189: pages 14-20.

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A New Species of Livebearer - A Fish You Know Already Know | 2 comments (2 topical, editorial, 0 hidden)
Re: A New Species of Livebearer (none / 0) (#1)
by angelhologram on Sat Apr 29, 2006 at 07:19:11 PM PST

Thank you very much for the article US, I appreciate being kept up to date. You're kinda like the CNN of Guppylog.
*BEFORE you buy fish make sure you understand what "Cycling" a tank means <- quoted from miskaral* ~Trying to make a difference one fish at a time~


Re: A New Species of Livebearer (none / 0) (#2)
by miskairal on Sun Apr 30, 2006 at 12:28:35 AM PST

Oohps! Sorry unc. I didn't realize I hadn't thanked you for this too. I meant to.
--
Repeat after me,
I will read the Immediate Help
[ Parent ]


A New Species of Livebearer - A Fish You Know Already Know | 2 comments (2 topical, 0 editorial, 0 hidden)
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