Friday, October 25, 2019

Egg-depositor fish Breeding..

        In this case, the eggs are either laid on a substitute, like a stone or plants leaf or even individually placed among. Fine leafled plants like java miss. Egg-depositors usually lay Lee's egg than Egg-scatterers. Egg- depositors fall into two groups: those that care their eggs,and those that don't care. Among egg depositors that care for their eggs are cichlids and soma catfish. Cyprinids, various catfish, and Killifish make up the majority of egg-depositors that do not care for their young ones. These species lays their eggs against a surface, where the eggs are abandoned. These species do not usually eat their eggs.

                         Spawning tank
                 For those egg-depositors that care for their young ones, the parents can remain in the tank after spending. Substrate spawners, depending on the species, should be given a tank furnished glass panes, broad-leafed plants,or flat stones for Spawning sites. Some species such as Discus and Angelfish prefer vertical surfaces.  For cavity spawners,flowerpots turned on their side,coconut shells, and rocky caves are suitable Spawning sites. The tank should be furnished with either live or plastic plants to give the fish a screen of security.
Egg-depositors that do not care for their young ones should be given a tank furnished with fine and broad-leafed plants,Java Moss, or artificial Spawning mops. After spending the parents or plants with the eggs should be removed. If the plants with the eggs should be removed. If the plants containing eggs are removed,new plants should placed in the tank for future Spawning.

Monday, October 21, 2019

Egg Layers Fish Breeding

         Most aquarium species are egg layers with extranal fertilizataion.Within this group, fishes can be divided into five group-egg-scatterers, egg-depositors, egg- buriers,mouth-brooders,and nest-builders;  depending on how they lay and handle their eggs.
          These special simply scatter their adhesive or non-adhesive eggs to the substrate,into plants,or float to the surface. The Egg-scatterers either spawn in pairs or in groups. There is no parental vcare given and even they eat  their own eggs,so large amounts of eggs are produced. The Characins and Cyprinids lay their eggs this way.
                         Spawning tank
            Because egg scatterers often eat their own eggs, the Spawning tank has to be set-up so that the eggs fall out of the reach of parents. For Egg-scatterers like Barbs and Danios, which lay non-adhesive eggs, the Spawning tank can be furnished with a substitute consisting of two layers of marbles or nylon betting just about the tank floor. As the eggs are laid, they fall through the marbles or the reach of the parents. After spending is over, the eggs or the parents can be removed.

For egg scatterers that lay adhesive eggs like Thtras, the Spawning tank should be furnished with a substitute. The tank should be placed with fine-leafed plants. The eggs are laid amongst plants, and adhere to the fine-leaves. The parents should be removed after spending.

Friday, October 18, 2019

Breeding of Livebearers..

       Different groups of fishes reproduce in different ways.An understanding of how the various species go about breeding is indispensable to undertake breeding programme.In general the fishes can be divided into two broad categories -Egg layers and Livebearers.
Within this basic grouping, different species have their own ways of ensuring the survival of at least a proportion of their offspring..

                Livebearers are fish that bear live young ones.There are two types of Livebearers:ovoviviparous,where the eggs form and hatch within the female before birth; and viviparous,where on eggs are formed, and the young are nourished through an umbilica-like cord or from secretions by the female.Livebearers are often prolific,easily bred species.

(Picture attached from GOOGLE)

                            Spawning tank
The live bearing fishes are the easiest of all aquarium fishes to breed; indeed, the only problem usually encountered is that of saving the young from the cannibalism of their parents. Various traps have been designed for the relatively rapid separation of the young from their mother at birth. The most satisfactory arrangement is a screen of mosquito netting on a stainless steel or wooden frame, which can be wedged across the tank so as to confine the female to one end while allowing the young to pass. Despite of all these devices, the more natural method is having plants in abundance to provide shelter for the young, and removing the mother at the easiest chance. The best plants for young Livebearers are masses of Myriophyllum,Ambulia,Nutella,Utricularia,Etc.
                Raising the fry of Livebearers
 Livebearers young are quite large, and young fishes can feed on dry or other prepared food straight away.If they are given only prepared food, growth will be poor, but a mixture of live and dry food development. Later it matters much Lee's, although the fishes will still do better with a good proportion of live food. Suitable first live foods are micro worms,newly hatched brine shrimp, shredded earthworms, daphnia,newly hatched mosquito wrigglers or shredded white worms. Suitable dry foods include any fine powder food, such as dried shrimp finely ground,fine cereals, and liver or egg powder.