[Cyprinodontiformes] Aquarium Glaser Newsletter October 9th, 2009
Domingo, 11 de Outubro de 2009 - 22:21:35 WEST
Esta é uma daquelas edições sem vivíparos ou ovovivíparos mas com o mesmo
interesse de sempre.
De: Aquarium Glaser GmbH [mailto:info aquariumglaser.de]
Enviada: sábado, 10 de Outubro de 2009 01:01
Para: Miguel Andrade
Assunto: [Provavel SPAM] Aquarium Glaser Newsletter October 9th, 2009
The mouthbrooding fighting fishes of the Betta pugnax group are wideley
spread over Thailand, Malaysia and Indonesia. The most currently described
species is Betta kuehnei from the northernmost Province Kelantan of Malaysia
and the southernmost parts of Thailand.
The species has been discovered by the travelling aquarist Jens Kühne and
introduced in the hobby as "blue throat fighting fish". It can be told apart
from the other species of the group by the intense blue throat coloration.
Like the other species of the Betta pugnax group B. kuehnei (which can reach
about 8 cm in length) is comparatively peaceful against congeneers and so
more than one pair can be kept together. However, the tank should contain a
good number of hiding places. Male and females can be distinguished best by
the different shape of their head.
Soft and acidic water is necessary for breeding, but keeping is possible in
almost any water. Breeding is similar to the other species of the group.
Males keep the eggs for about ten days in the mouth.
Lexicon: Betta: from the Javanese name for B. picta. kuehnei: in honour for
Jens Kühne. pugnax: Latin word for "martial".
Text & photos: Frank Schäfer
This beautiful Synodontis is a real dwarf compared with its numerous
congeneers: it reaches only 8-10 cm (very old specimens in extreme spacy
aquaria may reach 15 cm). In the hobby it became popular under the name
"dwarf petricola". Some species of Synodontis occuring in Lake Tanganyika
(where S. lucipinnis is an endemic species) have a cuckoo breeding
behaviour: they spawn together with spawning, mouthbrooding cichlids. They
eggs hatch together with the cichlid´s eggs in the mouth of the mother where
the young Synodontis feed on eggs and fry of the cichlids.
Breeding behaviour of the "dwarf petricola" is totally different. They are
regular open brooders and egg scatterers that produce a lot more eggs than
their cuckoo relatives. We offer the "dwarf petricola" which is probably
identical with the species described by Wright & Page as Synodontis
lucipinnis as German bred.
This Synodontis is a perfect tankmate for any cichlid in a Lake Tanganyika
tank. The species should be kept in groups (five specimens upwards) for they
have a very specialized sozial behaviour. Specimens kept solitary may become
a plague to tankmates. They try to get in contact with them and biting is a
common way of communication in Synodontis.
For our customers: the animals have code 185403 on our stocklist. Please
note that we exclusively supply the wholesale market.
Synodontis: an old name for an undetermined fish from the Nile. petricola:
from ancient Greek, meaning "rock dweller". lucipinnis: from Latin "lucidus"
= bright, clear and "pinna" = fin, referring to the clear window at the base
of each dark triangle on the fins (exception: the caudal fin), which is
species-specific for S. lucipinnis. endemic: this means that a species is
found only there and nowhere else in the World.
Text & photos: Frank Schäfer
Nothobranchs (genus Nothobranchius) belong to the most colorful species of
freshwater fish. This is true at least for the males, as female nothobranchs
are all more or less unicolored.
Nothobranchs are typical seasonal fish. They outlive the desiccation of
their habitat with eggs that can survive without water almost unlimited.
Nothobranchius furzeri is world famous for it is the fish with the shortest
livespan at all: between hatching from the egg and natural death are only 3
months! This is the reason why N. furzeri is in focus of science: medics and
biologists study the fish as a model organism to understand the mechanisms
Most species of Nothobranchius, however, live much longer and usually they
can reach at least an age of 9 months in aquaria. Nothobranchius foerschi is
a very beautiful species that originates from Tanzania. Males can reach
around 5 cm in length, females stay smaller. Naturally fish that are as
specialized as nothobranchs do not fit in usual community tanks. The most
beautiful picture is to see several males together in a one-species tanks.
Nothobranchs are solitary fish and so the males are displaying every now and
then. Males and females should be kept together only for spawning. They are
bottom spawners. The eggs need only around 6-10 weeks after drying out to
hatch. So it is possible to have the whole year through these nice fish in
your home aquaria.
Due to their strong metabolism nothobranchs need extra strong food. The
different types of frozen and live food are very suitable. Plants are
ignored. Regarding water temperature: there are differing philosophies among
killifish enthusiasts. In nature, temperatures can change very quickly. So
the fish are adopted to a wide range of temperatures: 18 - 30°C. However,
when kept in the upper or the lower end of this range for longer times they
become usceptible for diseases. On the other hand it is a fact that the fish
can have a longer live when kept relatively cool. Nothobranchs are basically
undemanding regarding the other water parameters, but it is best to keep
them in medium hard, slightly alcalic water, for otherwise they are very
usceptible for Piscinoodinium.
For our customers: the species has code 331503 on our stocklist. Please note
that we supply exclusively to the wholesale trade.
Nothobranchius: from ancient Greek "nothos" = false, untrue and "branchion"
= gill, referring to the gill anatomy.
foerschi: in honour for Walter Foersch.
furzeri: in honour for R. Furzer.
Text & photos: Frank Schäfer
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