Wednesday, March 16, 2011

Arowana Fish Farming Simple Techniques

Posted: 16 Mar 2011 07:54 PM PDT

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Arowana Fish is not something that you should learn some tehik or a way to cultivate this arowana fish, I do not know that professional sech but if I arowana fish culture which is as follows:

Maintenance Parent
Parent reared in pond size 5 x 5 m with water depth from 0.5 to 0.75 m. The pool closed 0.75 m-tall plastic to prevent the fish jump.

Non-spawning fish pond built in a corner and added a few logs to give the impression of nature. Stone and gravel avoided because it can injure fish or can be accidentally mixed feed.

Rearing ponds built in quiet area and partially closed, and kept away from direct sunlight. Parent reared in the rearing ponds until it reaches the mature gonad.

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Water Quality Management
Water quality was maintained for close to a natural environment that is pH 6.8 to 7.5 Arowana and temperature of 27-29 C. Replacement of water carried as many as 30-34% of the total volume with chlorine water

The balance of nutrition is very important for gonadal maturation and spawning. Parent awarded varied diet that contains high protein content. Feed given each day in the form of fish / shrimp live or runcah, and plus the pellet with 32% protein content. The amount of feeding per day is 2% of total body weight.

Gonad maturity
Mature gonads occurred at the age of 4 years with a body length 45-60cm.
Spawning occurs throughout the year, and reached its peak between July and December. Male parental in nature will keep the fertilized egg in her mouth up to 2 months when the larvae begin to swim.

Arowana females have a single ovary containing large ova 20-30 with an average diameter of 1.9 cm with varying maturity. Adult male also has a vital organ like the testis.

Sex Differentiation
Juveniles are difficult to distinguish gender. The differences will emerge after 3-4 years berukur fish.

Gender distinction in mind through the body shape and wide mouth. Arowana males have more slender body and narrow, the mouth larger and bolder colors than the females. A wide mouth with large cavities are used for the purpose of egg incubation. Another difference is the male head size is relatively bigger, more aggressive nature, including in the struggle for food.

Spawning Habits
Arowana behavior is very unique for the duration of the introduction of other species. This period lasts for several weeks or months before they start to become a partner. This can be observed at night, when fish swim near the surface of the water. Arowana male chasing the female around the pond, sometimes couples forming a circle (nose to tail facing couples).

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Approximately 1-2 weeks before spawning, the fish swim side by side with alternating body attached. There was the release of a number of reddish orange eggs, males fertilize eggs and then collect telurdi mulitnya for incubated until the larvae can swim and survive alone. The diameter of 8-10 mm and egg yolk-rich eggs and hatch about a week after conception. After hatching, young larvae live in the mouth of the male up to 7-8 weeks until the yolk is absorbed completely. The larvae escape from the mouth and become independent after 45-50 mm body size.

Harvest Larvae
Normal egg incubation is needed 8 weeks. To shorten the time, the fertilized egg can be removed from the mouth of stud 1 month after spawning. Male parent was arrested with the utmost care with fine nets and then covered with a damp cotton towel to avoid rebel and wounded fish.

To remove the larvae from the male parent’s mouth, gently pull the bottom of the mouth and body pressed lightly. Larvae were collected in plastic containers and incubated in the aquarium. The number of larvae that can reach 25-30 tail.

Hatchery Techniques
Once removed from the mouth of males, larvae incubated in the aquarium measures 45 × 45×90 cm. Water temperature 27-29 ° C using a heating thermostat. Dissolved Oxygen 5 ppm (mg / I) using a small aperture aerator.

To prevent infection due to larval treatment, dissolved in water Acriflavine 2 ppm. Using this in vitro seeding techniques, Survival Rate (SR) is obtained until the fish can swim phase is 90-100%.

During the incubation period, larvae need not be given feed. The first few weeks during the yolk is not depleted, usually the larvae are almost always located at the base of the aquarium. Larvae began to swim upwards gradually decreases when the size of the yolk. At week eight, the yolk is almost absorbed so that the larvae began to swim toward the horizontal. At this stage, the first live food should be given to prevent the larvae from each other When the larvae reach 8.5 cm in size or age of 7 weeks, the yolk is fully absorbed and the larvae can swim freely.

Rearing Larvae
Additional live food that can be provided such as blood worms or juveniles Arowana mouth size suitable openings.  Larvae that have reached 10-12 cm long can be given food such as freshwater shrimp or runcah small to offset the growth speed.

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