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Cyprichromis en Paracyprichromis 2

Cyprichromis leptosoma Malasa bl..
Cyprichromis leptosoma Jumbo Chaitika
Cyprichromis leptosoma
Cyprichromis spec.
Cyprichromis leptosoma jumbo

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Outside there is nothing to be seen of the difference in the numbers of the vertebras mentioned before. But Cyprichromis and Paracyprichromis differ from each other in ecological and in behavior as well so much that the new sub division seams acceptable also for the layman .
At the first place there are the dichromatic colors with the male. As far as known up until now this phenomenon only occurs with representatives of the Genus Cyprichromis ; the males of the same population are colored totally different. One part of the fishes has a clear yellow the other part a blue caudal fin. This phenomenon rather uncommon at the cichlids from lake Tanganyika is partly due to the popularity of these cichlids. One can only guess at the background of it, f.i. how it is inherited or which is the function of it.
Ecology and way of life.
Because these animals demand explicit requirements to their surroundings that only occur at specific parts of the shore, and because their occurrence often is limited at the deeper regions only they are to be traced only hardly and without a diving equipment scarcely to be caught or to be observed.
Depending on the species the upper frontier of their distribution at a depth of three till fifteen meters. Especial Paracyprichromis nigripinnis seems to prefer a larger depth where as P. brieni is to be found a little less deep. They occur exclusively above a rocky ground . There they live socially in large coherent groups lied to a particular area. Cyprichromis leptosoma often are found in schools consisting of more than thousands individuals; specially female animals that were breeding eggs or with a pharynx full of young ones Only at the margins of this formations were met also great numbers of males that were courting the females or were involved in mutual ritual fights. Although Paracyprichromis brieni sometimes occur at the finding places of Cyprichromis-specimen, the representatives of both genus a distinct preferences for very different rooms for living. When P. brieni seldom moves away from the bottom, the Cyprichromis-specimen preferably stay at a larger distance up from the

substrate in the free water. Vertical rocks along the bottom part of sheer cliffs for Cyprichromis leptosoma are distinct their favorite stay. All sardine cichlids are planktonivore , that feed themselves with little entomostracans out of the family of Cyclops and with planktonic algae as well (BÜSCHER, 1991). Their mouth. which they can extend like a kind of telescope is a kind of special adaptation to this way of feeding themselves. In the aquarium we can also see this when we feed them with daphnia or the nauplien of Artemia. In this way the sardine cichlids of lake Tanganyika accomplish the same role and position like the Utaka's of the genus Copadichromis in Lake Malawi. About this cichlids that are studied well, one knows that they live preferably in tremendous large flocks against the vertical walls of the underwater reefs while there their food is supplied to them by a stream. (FRYER & ILES, 1972). One supposes that on places in lake Tanganyika at the steep shores the sardine cichlids occur in the large numbers mentioned before the same ecological circumstances are found.
All sardine cichlids are maternal mouthbreeders; that means that the spawn immediately after secretion is taken in the mouth by the female and is bred there. While the eggs are very great consisting for the mayor part of yolk, it last also at higher temperatures longer than four weeks, before the offspring that at that moment is already 12 mms in length are released from the mouth. Observations in the aquarium proved Paracipichromidi to be substrate breeder's whereas Cyprichromidi are free spawners. Both of the Paracyprichromis-specimen preferably put their eggs at perpendicular surfaces. Female take a upside down position and wait as long as the spawned egg that sinks between her and the substrate reaches the mouth. to suck it up it than. The Cyprichromis-specimen on the other hand spawn in the open water far from the substrate. The eggs are secreted one by one and sink down After one egg has been excreted the female turns around at lighting speed to follow the sinking egg and to suck it in in the same way as food wood be taken