Hi alls!
Brian:
Not disputing, of course.
We only want to know all about killis:-)
Yes, you are rigth about rainfall data:
Jan 93.0 mm
Feb 81.3
Mar 116.9
Apr 89.9
I guess Mar is the month, in March the pools have the
sustrate with high humidity for the Jan and Feb rains,
and in this month, the rains start to cover the pool
with water.
Acuatics plants begin to see on April, and the killis
usually have a month or less.
For this place, the fishes start to "see" on July,
sexed ones and no more than 3 cm in bellottii and some
less in nigripinnis.
But not all Argentina have the same rainfall!
We are talking about Rio de la Plata sistem-Buenos
Aires(from Punta Lara-south- to Maschwitz,
Campana)Entre Rios(Ceibas and others places).
We can found in all these pools:Austrolebias
nigripinnis, bellottii, alexandri and Megalebias
elongatus.
The rain season on the south(Buenos Aires)Cuenca del
Salado and Pendiente atlantica(500 km to the south
from Buenos Aires) the pools start to fill in August,
September.
Last year(2004) we did a nice trip to that place,the
date was September and we only can find smalls frys,
maybe 2 weeks old(Austrolebias bellottii,
Austrolebias robustus and Austrolebias Sp(maybe
robustus group).
I am observing now, that the fish of this zone, can
support very well the heat than those the north
fishes(Maschwitz, Ceibas and others).
This is my small contribution for you:-)
Here we have today, 37ºC , is like the Hell!
Best regards
Martin
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Today's Topics:
1. RE: Cool water killis (Brian R. Watters)
----------------------------------------------------------------------
Message: 1
Date: Fri, 07 Jan 2005 10:56:28 -0600
From: "Brian R. Watters" <bwatters at sasktel_net>
Subject: RE: [Killietalk] Cool water killis
To: killifish discussion list <killietalk at aka_org>
Martin,
As the "man on the spot" you would know the
situation best. When do the
annual pools start to fill in your area and when do
the fishes first start
to appear ?
I ask this because the rainfall data for Beunos
Aires is as follows:
> May 76.6
Jun 63.7
Jul 59.1
Aug 65.0
Sep 78.3
Oct 96.6
Nov 88.8
Dec 95.9
There is really not much variation through the year
(the distinction between
"wet" and "dry" seasons seems to become more
distinct and one goes inland).
However, I do see an obvious relatively low rainfall
period during
June-September which corresponds mainly with your
winter. The "rainy season"
seems to be from about November to March (during
your summer), suggesting
that the annual fishes would start to appear in the
pools around
June-August. It would take some time for the water
table to rise and form
surface pools, or to noticeably increase the area of
the existing pools, and
that might only become obvious late in the rainy
season for your area, i.e.
March-April (and, therefore, late in the summer). Is
this correct ?
Please understand that I am not disputing what you
say - I am merely trying
to understand how these things work in your part of
the world.
___________________________________________
Brian R. Watters
University of Regina
Regina, Sask. S4S 0A2, Canada
Ph: (306) 584-9161 (home); (306) 585-4663 (work)
Fax: (306) 585-5433
E-mail: bwatters at sasktel_net
> -----Original Message-----
> From:
killietalk-bounces+bwatters=sasktel_net at aka.org
>
[mailto:killietalk-bounces+bwatters=sasktel_net at aka.org]On
Behalf Of
> Martin Fourcade
> Sent: Friday, January 07, 2005 10:18 AM
> To: killietalk at aka_org
> Subject: [Killietalk] Cool water killis
>
>
> Hi fellows
>
>
> About dry pools on summer:
>
> Well, I guess the Austrolebias pools are dry in
> summer.
> I live in Maschwitz, 47 km to Buenos AIres city(on
> north) and the most clasical biotopes are dry now.
> In some oportunities, the pools dont dry 100%, but
the
> water level down a lot and all the fishes
die(killis)
> for salt concentrations, hot or some predator,
like
> birds and anphibians.
>
> In some oportunities, as Brian says, rains season
> fills the pool agains, with river ups, and the
pools
> are "visited" for others fishes, like tetras,
> ciclids,hoplias and livebearers, but they only
have a
> small chance to survive, the heat usually dry the
pool
> again, in few days.
>
> About the question: all the Austrolebias and
> Megalebias can support cold waters.
> We have find some killis in very cold waters, 2ºC
in
> Ezeiza is a good example, Megalebias elongatus and
> Austrolebias bellottii.
>
> Pterolebias bokermanni(former longipinnis) can be
> breeded in a 13ºc -20 ºc without problems.
> Rivulus punctatus can survive under 13ºC.
> I has test this one,with a tank outside my house
in
> the end of winter(October and September) and they
> supported without problems low weeks temperatures.
>
> All the Austrolebias and Megalebias, love the cold
> waters:-)
>
> Regards
>
> Martin
>
>
>
>
>
>
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