Top Ten The ten most popular fish species from by lpd48805

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									Aqualog news                                                                                                 NUMBER 78                4

                                                        TOP TEN

 Top Ten: The ten most popular fish species from Guyana
 In contrast to other South American sources (for example Brazil, Peru and Colombia), fishes are rarely imported
 from the Guianas. But the latter are home to numerous attractive and interesting aquarium fishes, and it gives
 us great pleasure to present a number of them to you here.
First place: Pyrrhulina filamentosa
This member of the splash tetra group
grows to a maximum length of around 10
cm, and is a surface-dwelling species that
inhabits small streams and shallow areas
in lagoons. The males can be rather
quarrelsome among themselves, and so
the aquarium for their maintenance
should be at least a metre long, and
include not only dense thickets of plants
but also open surface and plenty of
swimming space. These fishes spawn on
the upper surface of large aquatic plant
leaves. The males tend the spawn and the
newly-hatched larvae until they become
free-swimming.

Second place: Anableps microlepis
The four-eyes live in fresh and brackish
water from the coastal part of Venezuela,
across the Guianas, and south to the
mouth of the Amazon in Brazil. These are
surface-dwellers that feed predominantly
on insects and their larvae, but also hunt
for anything edible in the mulm. Salt
should be added to the water, as this will   1


                                             considerably increase their resistance to     A rarely-seen cichlid, which in its
  TOP TEN                                    pathogens in the aquarium. Because of
                                             their specialised requirements they are
                                                                                           homeland inhabits still, shallow waters
                                                                                           warmed by the sun. It is a cave-brooder;
 1 Pyrrhulina filamentosa                    best kept in a species aquarium;              the parents share the work, with the
                                             occasionally one sees display aquaria         female initially tending the eggs and
                                             containing an attractive simulation of a      larvae in the cave. After the fry become
                                             mangrove biotope,and they can share this      free-swimming both parents shepherd
 2 Anableps microlepis                       type of tank with various crab species.       their offspring around the aquarium.

                                             Third place: Acestorhynchus microlepis        Sixth place: Gasteropelecus sternicla
 3 Acestrorhynchus microlepis                This cachorro species, which grows to         This rather large hatchetfish (up to 6 cm) is
                                             around 30 cm long, comes from both            a shoaling fish that spends almost all its
                                             black and white water, and prefers slow-      time at the surface of the aquarium. It is an
 4 Gnathocharax steindachneri                flowing waters. It is an out-and-out          exceptionally talented jumper, which,
                                             piscivore, and hence -obviously - should      especially when panicked, likes to fly out
                                             be kept only with other species of similar    of the water. For this reason it is absolutely
 5 Guianacara cf. owroewefi                  size.                                         essential for the aquarium to be tightly
                                                                                           covered, as it is quite astonishing how
                                                                                           adept these fishes are at targeting the
 6 Gasteropelecus sternicla                  Fourth place: Gnathocharax steindachneri      smallest opening. In addition, food is
                                             The biting tetra is a rarely imported         taken only from the surface.
                                             characin species, usually seen as a by-
                                             catch in consignments of other tetra          Seventh place : Satanoperca jurupari
 7 Satanoperca jurupari                      species from South America. With a            This eartheater has a wide distribution in
                                             maximum total length of 6 cm, it can be       South America, though it remains unclear
                                             kept in aquaria with a volume of around       whether it is actually one and the same
 8 Nannacara anomala                         150 litres upwards. It uses its clearly       species found at all locations. These fishes
                                             visible, pointed teeth to seize larger prey   can be regarded as peaceful but they do
                                             items, which are then greedily swallowed.     grow rather large, and hence require a
 9 Eigenmannia virescens                     A striking feature is the bright red eye,     tank of 150 cm upwards in length.
                                             which contrasts attractively with the spot    Breeding them is not easy, but rewarding
                                             on the caudal peduncle.                       as their brood care is interesting. They will
 10 Cichla monoculus                                                                       sometimes spawn even in moderately
                                             Fifth place : Guianacara cf. owroewefi        hard water, but in general very soft, acid
                                                                                           conditions are required for breeding.
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These fishes live in permanent, close-knit
groups, which means interesting
behavioural observations are possible.         Tenth place : Cichla monoculus
                                               A particularly intensely coloured Cichla
Eighth place : Nannacara anomala               species that grows to just under a metre      9
This dwarf cichlid inhabits the waters of      long. It is a predator than inhabits
the savannah in areas near the coast. It       practically the entire Amazonian lowlands.
feeds on worms, small crustaceans, and         When young it feeds on shrimps and large
insects. It has long been one of the most      insects, but adults, by contrast, are
popular of the dwarf cichlids, and can be      exclusively piscivorous. They can be kept
bred and reared without problem. Unlike        together with rays and large catfishes and
many Apistogramma species it has no            characins, but because of their size they
special requirements as regards water          are usually seen only in large display
chemistry.                                     aquaria.

Ninth place : Eigenmannia virescens            Reserve: Copella carsevennensis
The so-called green knifefish exhibits         Copella carsevennensis is a member of the
distinct sexual dimorphism in terms of         South American splash tetras. These fishes    10
size: males grow up to around 40 cm long,      live in sunlit waters with a good growth of
while females attain only a good half of       vegetation.        The males, with their
this size.These fishes can communicate by      prolonged and sometimes rather brightly-
means of their electrical organs. Because      coloured fins, are particularly attractive.
they are territorial at least some of the      This species spawns out of the water, on
time and are aware of the presence of          overhanging leaves. The spawn is then
conspecifics via their electroreceptors, the   splashed with water by the male using
aquarium should provide plenty of hiding-      beats of his tail, and is thus kept moist.
places.
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