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Jungle Trip
December 23, 2009
1:27 am
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johnpeten
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Yesterday it rained all day and the temperature dropped dramatically. I had to get a sweater out of mothballs /angry.gif" style="vertical-align:middle" emoid=":angry:" border="0" alt="angry.gif" />
This turned the jungle trails to mud. Sensibly the boys returned this afternoon.
They brought back Firemouths, large Sardinas and some livebearers, unknown to myself.
The largest one with a vertical black band on its caudal fin measures 9 cms, which puts it out of range of most Poeciliidae here. It has a very small gonopodium compared with what I have been studying recently. The smaller fish do not have the black band or gonopodium.
I have been through the 35 genera/species of the family without any hits. Many species are endemic to small areas and information is scarce but the size eliminates them.

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December 23, 2009
4:08 am
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johnpeten
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I now believe this liverbearer is a Molly. Poecilia. gillii. The male reaches 6 cms and the female 10.5 cms.
However I was not actually told about the "birds and the bees" so I am a little fuzzy on this subject. /blush.gif" style="vertical-align:middle" emoid=":blush:" border="0" alt="blush.gif" /> As my largest fish is 9 cms it should be a female. Do females have gonopodiums?

A photo of one of the smaller fish 6 cms showing the dorsal fin. The colour is pinkish not as intense as in the photo.

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December 23, 2009
5:06 pm
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David Marshall
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Hey John

Wow lovely looking fish.

Only male Mollies have gonopodiums.

Fish in the photo. above looks like a female and those above are males. The fins of the sexes are very different in shape.

Females release fry approx. every 30 to 40 days. Numbers of fry increase as the female ages.

Regards David

December 23, 2009
7:42 pm
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johnpeten
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QUOTE (David Marshall @ Dec 23 2009, 10:49 AM) < {POST_SNAPBACK}>
Hey John

Fish in the photo. above looks like a female and those above are males. The fins of the sexes are very different in shape.


Thanks David, here is a photo of the male with the dorsal fin open, showing the different shape.

The problem now is that if these are P.gillii then the databases are wrong concening the sizes. They have got it backwards and the males are much larger then the females.

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December 24, 2009
9:40 pm
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David Marshall
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Hey John

MERRY CHRISTMAS

Y.A.A.S. showing sizes for P.gillii :

male - 6cm
female - 8cm

Regards David

December 26, 2009
2:47 pm
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johnpeten
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Another fish that came to me from this trip has turned out to be a Jack Dempsey. I had been asked to search for the Rocio but possibly in the Lake.
Although this is a youngster it is probably not Rocio.octofasciata but R.ocotal a new species described by Schmitter-Soto in 2007. This was found in Laguna Ocotal a very isolated body of water in the highlands of Chiapas just over the border from the Peten and thought to be endemic.
So this has turned out to be a very interesting fishing trip.

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