These fish were hatched end of January, from eggs received from Ricardo Rojas. They are A. alexandri ” El Bulin” GAK 2014/05. This species is gorgeous. I don’t know about its cold tolerance yet but it should be as usual. I like the margins of the dorsal and anal fins a lot.
Spring season has started. The first juveniles have already been transferred to the garden. In the garden house many fish are still there since summer 2014. They have overwintered without heating. I will read out the datalogger measuring the temperature time series soon. Among the survivors: A. juanlangi Parque Rivera (photo), A. alexandri San Javier, A. nigripinnis Franquia, Villa Soriano, A. elongatus Vivorata, A. prognathus Salamanca, A. bellottii Estacion Sol, Maschwitz, A. affinis R5km399, A. charrua Canal Andreoni, A. viarius Valisas, A. cheradophilus Castillos, Ruta1316.
It’s almost February, time to start raising this year’s new breeders. I’ve started at home, with bags from Uruguay and Argentina that I stored for four months (Thanks Heber Salvia, thanks Ricardo Rojas, thanks Rafael Mitre Muñoz!). The photo is the moment where I put the peat+eggs in small containers with some extra peat. I add half a cm or one cm of 15C rain water. All containers then go inside a small incubator at about 22 degrees C. Result: 23 cheradophilus “la Paloma”, some 15 vandenbergi Talon Cansado, melanoorus Tranqueras, arachan Bañado del Chuy, duraznensis Paso de san Borja, alexandri San Javier, El Bulin and El Pingo. Not bad to start the year with! Some other fish here at home will have to move soon!
Here a picture of fish caught at the km 331 site on road Ruta 26. These large Austrolebias were first described as nioni but Costa classifies them as vazferreirai now. I have bred them since 2009, the last few years with difficulties. Biased sex ratios for a while, last year juveniles killed each other. So it’s down to a few eggs now. Fortunately I am still recovering some eggs from my first peat ever, from 2009.
A species found at many sites in Rocha, Uruguay, is Austrolebias luteoflammulatus. Even while it is locally abundant, this one is not too easy to keep. They prefer water with low nitrite levels. Females lay large eggs, hence need to eat a lot. The eggs like it a bit dry, or the alevins will often not hatch. Nevertheless, once you have them going they are great. These are fish born in 2014 from eggs laid in 2010. The site where they are from is one of my favourites, next to a local science museum and few kilometres from the beach and lovely La Paloma.
Among the large Austrolebias, cheradophilus is an interesting species. It doesn’t have the long snout of elongatus but it is definitely large and born large. The first line I had was from Castillos, Uruguay. Back then these fish hardly had any stripes. I lost them unfortunately, but my new line which I have for some years already is very striped. They can lay many eggs, but it is difficult to make the females grow to the sizes seen in the field.
Not my best photo ever, but one feature of this species is clear: when the bars are widely spaced, there are often les pronounced bars in between. Austrolebias arachan is a species found in Uruguay. I keep the “Parque Rivera” and “Arroyo Chuy” populations from in and around Melo. When they are fished in the field, the fish are near black sometimes with stripes.
A photo of A. robustus, one of my favourite Austrolebias species. This is a pair from the “Ruta88km74” population, believed to be the Southernmost Austrolebias site. I have had them since 2005, but right now I’m down to one fish…so let’s hope a few more still hatch, or I will NEED to go fish them again.
This is the only Brazilian Austrolebias I breed at the moment. The males are rather stocky and with beautiful colours. The females have typical large dark spots. This is the population from “Sao Sepe”. The fish on the photo are 9 months old, and have been kept in a small group in an unheated room. Next week they will go into my garden house.