[Cyprinodontiformes] Aquarium Glaser Newsletter January 29th, 2010
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Sábado, 30 de Janeiro de 2010 - 18:18:25 WET
Caríssimos colegas,
Mais novidades da Glaser.
Não há Cyprinodontiformes mas há uma espécie especialmente interessante para
descobrirem... Danionella dracula.
A esperança é sempre a última coisa a morrer.
Um abraço
Miguel
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De: Aquarium Glaser GmbH [mailto:info aquariumglaser.de]
Enviada: Nenhum
Para: Miguel Andrade
Assunto: [Provavel SPAM] Aquarium Glaser Newsletter January 29th, 2010
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Danionella dracula
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Danionella are extremely small cyprinids, which never grow larger than 2 cm.
The species that was discovered first - Danionella translucida - was thought
to be the smallest cyprinid in the world, until the even smaller genus
Paedocypris was discovered.
Currently, four species are recognized by science, three from Burma and one
from northern India. It was only last year (2009) that a new species from
Burma was described and given the unusual name Danionella dracula. Although
no cyprinid has real teeth on the jaws it was found in males of the new
Danionella that under the mikroskope small teeth-like extensions on the jaws
became visible. The two foremost pairs of "teeth" are even fang-like, which
reminded the describers on the fangs of the legendary vampire Count Dracula.
Sadly these "teeth" are not visible in live specimens.
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Danionella are not difficult to keep at all. However, due to their small
size they need tiny live food and should be kept in one-species-tanks. But
they are neither getting sicknesses easily nor are they delicate. They are
kept best at room temperature (18-22°C). They spawn in javamoss or on filter
foam. Water chemistry is of little importance, best is medium hard water and
a neutral pH.
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For our customers: the fish have code 413412 on our stocklist. Please note
that we exclusively supply the wholesale market.
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Lexicon: Danionella: diminutive of Danio; Danio is another genus of fish.
dracula: after Count Dracula, a character in a novel created by Bram Stoker.
Dracula was a bloodsucking vampire; in allusion to the fang-like "teeth" in
males of the species. Paedocypris: ancient Greek, means "childish carp", in
allusion to the larvae-like morphology of the species. translucida: Latin,
means "shining through", due to the transparency of the fish.
Text & photos: Frank Schäfer
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Yunnanilus sp. "Rosy"
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The genus Yunnanilus comprises a comparably high number of species: 30
species are currently recognized as valid, but there are for sure much more
species. Most known species have a very small distribution area. If you
realize that only a very small part of the waters in the area of the genus
have ever been subject of a scientific survey it becomes clear that many
species still remain undiscovered.
In the hobby so far three species are known. Two of them are also known to
science whereas the third represents an undescribed species. The latter is
subject of this note: Yunnanilus sp. "Rosy". This tiny species belongs to
the smallest species of loach known so far. It hardly ever becomes longer
than 3 cm. It shows a very unusual behaviour, compared with other loaches.
It is not a bottom dweller at all, but prefers to swim in a school in open
water. Only for taking food or for resting (preferably on a kind of lookout)
it sinks to the ground.
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Another very special feature of this genus of loach is worth mentioning: the
members develope a strong sexual dichromatism. This means, males and females
have a different coloration. In case of Yunnanilus sp. "Rosy" the male's
basic colour is ivory-whitish, and the female has a very pretty orange-rosy
basic coloration.
This dwarf species is completely peaceful. It is collected in the very same
area in Burma where the Galaxy rasbora (Celestichthys margaritatus) is
collected. This means they sometimes like cooler temperatures (16-20°C in
winter, 22-26°C in summer). In nature, the water is medium hard and neutral
(pH 7.6). However, the fish proved to be undemanding in this respect in the
aquarium.
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For our customers: the species has code 478502 on our stocklist. Please note
that we exclusively supply the wholesale market.
Lexicon: Yunnanilus: after the Chinese province of Yunnan, where the first
discovered species appear.
Text & photos: Frank Schäfer
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Aequidens sp. "Atabapo"
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Currently we received this beautiful and very interesting cichlid from
Colombia. It is a scientifically undescribed species which grows to a size
of more than 20 cm. Its distribution is restricted - at least as far as
known - to small waters at the Rio Atabapo, which forms one of the western
tributaries of the Orinoco river.
These cichlids are very peaceful. Their way of broodcare is quite unusual
for Aequidens, because they are larvophilous mouthbrooders. Like all
Aequidens they are biparental broodcarers. The species is a bit sensible for
the "hole-in-the-head-disease". So regular waterchanges and high quality
food is absolute necessary for the successful keeping.
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For our customers: the animals have code 611155 on our stocklist. Please
note that we exclusively supply the wholesale trade.
Lexicon: Aequidens: Latin, means "with equal tooth". This refers to the set
of teeth. larvophilous: mouthbrooders that take the larvae, but not eggs in
the mouth for broodcare.
Text & photos: Frank Schäfer
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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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