Monday, May 4, 2020

Breeding and cultura of gold fish

             Gold Fish(Carassius Auratus)

           Common gold fish, Carassius Auratus,belongs to the order: Cypriniformes and family Cyprinidae. It is an omnivorous fish and fees on a wide variety of live feed and accepts artificial feeds also. Colou of gold fish ranged from Red,Orange,Silver, Black, Brown, With and many more. More than 30 varieties of gold fish are available. The most common varieties are Oranda,Lion head,Fan tail,Telescope eye,Bubbles eye,Albonio,Pearl scal and several others.

Required water parameters such as pH 7.0 to 8.0, temp 25 to 30°C, dissolved oxygen 5 to 7 ppm, dissolved free carbon dioxide 0 to 4 ppm and total alkalinity 80 to 100 ppm. Electric serato (pump) raise dissolved oxygen level of water to 6-7 ppm which is necessary for breeding. Partial water exchange 25 to 30%) is vary much essential from breeding tank. Breeding carried out in"Gamlas", 40 to 60 1 capacity which is made up of clay or cement or in rectangular glass aquarium of 50 1 capacity. General fecundity of gold fish ranged from 500-700 depending upon the size. Sex ratio is 2:1(male: female) to ensure successful breeding. Eggs are generally regarded during night hours. Fertilized eggs are transparent and graysh in colour and unfertilized eggs are transparent white. Eggs are sticky in nature; substratum may be maintained with soft weeds,tiles,corrals etc.,for settlement of eggs.
Fertilizer eggs hatch in 4 to 7 days depending upon water temperature. No parental care is seen. Parents eat hatchings. As a result will be removed after breeding.

Sex Detection:
            In case of male gold fish white bumps or tubercles develop on the operculum and peatoral fin. Main ray of pectoral fin have thick edge in case of male but thinner edge in case of female. Fins become more pointed in Case of male but look rounded in female. Vent assumes a concave shape with a small opening in male and vent becomes convex of female.

Culture of common gold fish:
                The cultura of common gold fish is being taken up normally in cement takes of dimensions 10' x5' x2' or 12' x6' x2'. Preferable temperature for culture is 15.5 to 24°c. pH range 7.0 - 8.0 and prefer moderate hardness  of 50- 75 mg CaCO3 per litre and oxygen level of 5-7 ppm. Generally 300 fry (23 mm) of gold fish are stocked in each cement tank of dimension 10' x5' x2'.
The newly hatched young ones depend upon their yolk size as a food source fo a couple of days. when the fry become free swimming they are being fed  with Artemaia,Daphnia,Moina,Tubifex worm and other planktons. Young ones of 2-3 days old feed with eggs yolk and dried milk powder. After 10 days the young ones start feeding the Tubifex worms and maintained till their disposal.

Friday, April 3, 2020

Raising the fry of Egg layers

          When the eggs hatch, the larvae that emerge look nothing like the parent fish. Instead, the larvae have a large, yellow yolk sac and are barely able to swim. The larva feeds on the eggs sac untill all the yopy  is absorbed. Once the yolk sac is absorbed, the fry starts feeding on external food. The fry of small fish can be first fed with infusoria,,"green water," or egg yolk.
 Later these fry can be fed  larger food like white worms, Daphnia,Artemia nauplii, and ground flakes. These food are good as a first food for slightly larger fry such as those of cichlids. Once the fish grow larger, large foods like brine shrimp,larger Daphnia,flakes,insect  larvae, and chopped Tubifex worms are accepted. The fry  should be fed several times a day. Many species need periodic sorting by size, so that larger fish do not cannibalize smaller fish.

Sunday, December 29, 2019

Nest-Builder Fish BREEDING

            Many fish species build some sort of Nest for their eggs. The nest ranges from a simple pit dug into the gravl or elaborate bubble nest nesmed with daliva-coated bubbles. The Gouramis,Anabantids and some catfish are the most common of this type of spawners. Nest builders practice brood care.

Spawning tank
           Nest-Builders should be provided with material with which to build their nests. For bubble-nest builders, fine leafled and floating plants should be provided, and the tank should have no water current to disturb the nest. Species that build nests in the substrate should be given fine gravel or sand.

Friday, November 22, 2019

Mouth-brooder Fish Breeding..

Picture attached from Google

            Mouth-brooders carry their eggs or larvae in their mouth. Mouth brooders can be broken up into ovophiles and larvophiles. Ovophiles or egg-loving mouth- brooders lay their eggs in a Pit,which are sucked up into the mouth of the female. The small number of large eggs hatch in the mother's month, and the fry remain there for a period of time. Many cichlids and soma labyrinth fish are ovophile month-brooders. Larvophile or larvae-loving month-brooders lay their eggs on a substrate and guard them until the eggs hatch . After hatching , the female picked up the fry and kees them in her mouth. When the fry can feed for themselves,they are released.

Spawning tank
Picture attached from Google

                Ovophile month-brooders can be bred in the main aquarium because the eggs are produced in the month cavity.However, it is better to separate mouth-brooders with eggs because of their potentially aggressive behavior. There are no special breeding tank requirements others than the usual tank set-up for the species. Larvophile mouth-brooders should be placed in a separate breeding tank because the eggs are produced in the month but laid on a surface where they are open to predators.

Saturday, November 16, 2019

Egg-buriers fish Breeding


              Fishes in this group usually inhabit waters that dry up at same time of the year. The majority of egg buriers are annual Killifish, which lay their eggs in mud . The eggs remain in a dormant stage until rains stimulat hatching.

Spawning tank

                  A peat-moss substrate is one of the best substrates of egg-burying species. The peat moss can be removed after spending and placed in plastic bag to be stored for weeks to mother (depending on the species). A new peat-moss substrate can be placed in the tank for further Spawning. In order to initiate hatching, the stored peat can be immersed in soft water.