LIVEBEARERS T Phallichthys tico - - a dainty new ... - Aqualog

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Aqualognews NUMBER 94 10 orange base color. At present it is impossible to say whether this denotes sexual dichromatism or perhaps that two very similar species were represented in the consignment. Be that as it may, the imported fishes were 4-6 cm long, and the eventual length of P. changae is about 12 cm. Panaqolus sp.“Pucallpa” This may well be a local variant of P. changae. Juveniles of 3-4 cm are Panaqolus sp.“Pucallpa”,female long and fully sexable. the most attractively colored, but unfortunately the colors become ever duller with increasing age. The largest specimens imported were about 8 cm Wood eaters Panaqolus are chiefly wood eaters, just like their larger cousins the Panaque species. Soft wood is, essentially, an indispensable component of the diet of these fishes.In addition they can be offered numerous other foods, eg food tablets, dead leaves, cucumber, slices of potato, pieces of carrot, etc,but it is very important to avoid high Panaqolus sp.“Pucallpa”,juvenile all Photos: Frank Schäfer Panaqolus sp.“Pucallpa”,Männchen levels of protein as well as of carbohydrate. The digestive system of these fishes is not designed for such foods, and in the worst case scenario incorrect feeding can lead to the death of the fishes. Because they eat very large amounts efficient filtration is essential to remain in control of the resulting huge quantities of excreta. Breeding Panaqolus changae has proved to be relatively easy to breed. The breeding tank should, however, be rather large (say 120 cm upwards in length), as these fishes can be very rough in their courtship fervor. P. changae are typical cave-brooders. They have no special requirements as regards water parameters, and breeding usually Aquaristik Streng Spezialmischungen - Einzelsaaten - Zubehör 91735 Muhr am See - Bahnhofstraße 48 Telefon 09831 / 99 54 - Telefax 09831 / 88 835 takes place in normal mains water at 28-30 °C. It is very important to give the fry droppings from the parents to eat at an early stage, so that they obtain the symbiotic bacteria they require to survive,as it is known that no individual can obtain nourishment from plant material without such symbionts.
Aqualognews NUMBER 94 11 The Jaguar Angelfish by Roman Neunkirchen T his often leads to hybrids between different species, and invariably combines genetic material from individuals that are only very distantly related. The result is an increased F ANCY FISH Angelfishes are among the most popular of all ornamental fishes. Because the systematics of these fishes has to date been studied only very inadequately, individuals from totally different geographical regions have been (and still are) frequently mated to one another. Angelfish of the “jaguar” cultivated form. Photos: Frank Schäfer occurrence of genetically dictated changes that may affect coloration or even body form – we have only to think of the veiltailed forms. Accidental mutations can be genetically fixed relatively quickly through back-crossing to the parents. This is how new cultivated forms usually arise. Wild angelfishes - a single species? It is, of course, also the case that new variants can suddenly turn up in long-bred strains as a result of mutation. But this happens comparatively less frequently. Be that as it may, it is very noticeable that it is those species of aquarium fishes that already occur in the wild in a large number of different-colored populations – examples are the Guppy and Platy – that very rapidly give rise to a wide variety of cultivated forms. Here too the boundaries between “variant” and “species” are fluid and not sharply drawn, precisely as in the angelfishes. Pterophyllum scalare is very widely distributed in Brazil, French Guiana, Guyana, Columbia, and Peru and numerous local populations also have their own names in the hobby: examples are the “Peruvian Altum”, the “Redback”, the “Eimekei”, etc, all technically members of the species P. scalare. Cultivated forms – only for beginners? It is a great pity that the precise origins of cultivated forms of aquarium fishes are generally only very inaccurately or anecdotally documented. The reasons for this are manifold, but usually commercial interests are at the root of the secrecy.That
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