[Cyprinodontiformes] Aquarium Glaser Newsletter September 11th, 2009

cyprinodontiformes viviparos.com cyprinodontiformes viviparos.com
Domingo, 13 de Setembro de 2009 - 22:28:00 WEST


Caros colegas,

 

Aqui vai a habitual informação da firma Glaser, outra vez sem
Cyprinodontiformes vivíparos ou ovovivíparos a destacar… mas há algo nesta
edição desta “ newsletter “ que gostava de partilhar convosco.

Reparem no Tetra anão Tucanoichthys tucano.

A mim parece-me evidente que esta é a segunda espécie noutra família com um
colorido algo semelhante ao da Heterandria formosa ( reparem na segunda foto
).

Desconheço o nicho ecológico desta preciosidade, mas para um predador míope
( como todos os peixes são ), numa água menos clara… e temos aí uma
autêntica Heterendria formosa entre os Caracídeos. Mal sabem os predadores
que a agressividade deste pequeno animal de 2 cm é no entanto muito
diferente da pacífico Poeciliídeo. 

 

 

Um abraço

 

Miguel

 

 

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De: Aquarium Glaser GmbH [mailto:info  aquariumglaser.de] 
Enviada: domingo, 13 de Setembro de 2009 01:01
Para: cyprinodon  clix.pt
Assunto: [Provavel SPAM] Aquarium Glaser Newsletter September 11th, 2009

 


 
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Tucanoichthys tucano

 
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Three months ago we could announce the first successful importion of the
dwarf tetra Tucanoichthys tucano from the upper Rio Uaupes (see enter in our
newarchieves from 8.6.09). Now we are able to give some more information on
the charming species.

The maximum length of this fish is about 2 cm. Thus it fits ideally for
so-called nano tanks, especially because this species - like many other
tetras - is not a continuous swimmer, but a  rather unhasty species. The
behaviour of Tucanoichthys resembles much to that of the emperor tetras
(Nematobrycon). Like the emperors they like to live in a community of their
own but are not schooling fish in the strict sense. Only when the fish feel
really disturbed or anxious they swim in a school for a short time. As soon
as the disturbance is over they seperate from each other again.

 
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Also similar to emperor tetras is the fact that Tucanoichthys are
brood-caring fish, which is very rare among tetras. As we already mentioned
in the news there are two phenotypes, one with red in the fins and one with
hyaline fins. It seems very likely that this represents a kind of sexual
dichromatism. From nature it is reported that the animal that is broodcaring
(probably the male) is quite aggressive against potential or real predators.
Even relatively big fish, like the sympatric Nannacara adoketa, become
attacked and driven away successfully.

Regarding feeding Tucanoichthys is completely undemanding. Any usual
fishfood is readily taken, even flakes. But they are blackwater fishes and
so they need very clean, soft and acidic water. Tucanoichthys are very
sensitive against negative stress. So one should be very careful when
catching and packing them, otherwise losses are very likely.

Lexicon: Tucanoichthys: means "fish of the Tucano", a tribe of indigenous
people that settle at the Rio Uaupes. tucano: see generic name.
Dichromatism: means "with different colours". The term is used for example
if male and female have different coloration.

Text: Frank Schäfer, photos: Chris Lukhaup

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Geophagus winemilleri 

 
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The main distribution of Geophagus winemilleri is the southern part of
Venezuela. Nevertheless most imports come from Brazil, because the species
also occurs in the Rio Negro. G. winemilleri becomes often confused with G.
proximus and a second, still undescribed or unidentified species. However,
G. winemilleri can be identified by the dark spot on the operculum, reddish
fins and four dark vertical bars on the body.
It is mentioned already in the original description of the species that the
caudal fin can be spotted or striped (depending on the population?).
Geophagus winemilleri is a biparental larvophilous mouthbrooder, which is
pretty easy to keep and can be even bred without too many problems. 

Text & photo: Thomas Weidner

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Chela laubuca

 
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Currently we offer a beautiful surface dwelling fish for community tanks for
fishes from Asia: Chela laubuca. The absolutely peaceful species attains a
total length of around 6 (rarely 8) cm. Keeping and breeding is comparable
to that of the zebrafish (Danio rerio) which shares the same habitats as
Chela laubuca in nature.

 
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Text & photos: Frank Schäfer

Lexicon: Chela: from a vernacular name of the fish; laubuca: from a
vernacular name of the fish.  

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...and please do not forget to visit our homepage
<http://www.aquariumglaser.com/en/>  to get weekly updates !

 
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