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Effect of Different Feeds on Larval Development and Survival of Ornamental Koi Carp, Cyprinus Carpio (linnaeus, 1758) Larvae in Laboratory Condition

M. S. Mahfuj
Department of Fisheries Biology and Genetics, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. A. Hossain
Department of Fisheries Management, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. G. Sarower
Fisheries and Marine Resource Technology Discipline, Khulna University, Khulna-9202.

Abstract/ Executive Summary:

The experiment was conducted for 56-day with a view to observe the effects of different feeds on larval development and survival of 3 day-old ornamental koi carp Cyprinus carpio larvae in fiber glass aquaria to develop rearing technique for promoting its aquaculture and for promoting the aquarium business. There were three treatments, each having two replications, stocked with 30 larvae having an initial length and weight of 2.31 ± 0.10 mm and weight of 0.005 ± 0.01 g respectively, in a glass aquaria of size 30 × 10 × 6 inch. Three different feeds i.e. crushed pellet feed, mixed diet i.e. 50% pellet + 50% chopped tubificid worms and live chopped tubificid worms, having different protein levels were administered to compare their suitability as food for the rearing of C. carpio larvae. The larvae fed with chopped tubificid worms showed significantly better results in terms of length and weight gain, percent length and weight gain and specific growth rate (SGR %) compared to the rest two treatments. The highest survival rate 56.66 ± 2.29% was shown by the chopped tubificid worms fed larvae which was significantly higher than those of crushed pellet feed and mixed diet respectively. Water quality parameters were monitored throughout the experimental periods. On the basis of larval development and survival rate, it could be suggested the live chopped tubificid worms is suitable for the culture of ornamental koi carp C. carpio larvae.

Keywords: Koi carp, Cyprinus carpio, Growth, Survival

Location: Fish Physiology Laboratory of Fisheries and Marine Resource Technology Discipline, Khulna University, Khulna, Bangladesh

Start Date: 25-12-2010

End Date: 20-02-2011

Program Area: Animal Health and Management

Commodity: Koi/Climbing

Objectives:

The present study was carried out to determine the appropriate feed i.e. protein level for larval rearing and survivability of ornamental koi carp C. carpio larvae in the closed aquaria. In the hypothesis testing it will be assumed that there is no significant difference on larval development and survival of ornamental koi carp larvae.

Methodology:

The experiment was conducted for eight weeks (56 days) from 25th December, 2010 to 20th February, 2011 in the glass aquaria of volume (30 × 10 × 6 inch3) in the Fish Physiology Laboratory of Fisheries and Marine Resource Technology Discipline, Khulna University, Khulna, Bangladesh. Three treatments were used each having two replications provided with three different feeds i.e. treatment T₁ (crushing pellet feed), treatment T₂ (mixed diet i.e. 50% pellet + 50% chopped tubificid worms) and treatment T₃ (live chopped tubificid worms). Each of the two replications of three treatments was stocked in to 30 larvae having average length of 2.31 ± 0.10 mm and weight of 0.005 ± 0.01 g respectively. The larvae were produced by artificial breeding with PG dose at fish physiology laboratory in Khulna University. The larvae were reared with boiled eggs yolk until the start of the experiment to avoid the biasness of growth. Before stocking of larvae, each of the aquaria was cleaned up and prepared with all the facilities necessary to run the experiment efficiently. About two-third water from each aquarium was replaced with clean water at every alternate day before feeding. Proper aeration was done to supply sufficient oxygen into the aquaria and it continued until the end of research work. The feces in each aquarium were removed by siphoning and the dead larvae were removed and counted in the morning and in the evening prior to feeding. Adhered dirt inside the aquarium walls was cleaned thrice a week. Proximate compositions of feeds were analyzed following the standard methods given by Association of Official Analytical Chemists (AOAC, 1980) in the Fish Nutrition Laboratory of Fisheries and Marine Resource Technology Discipline, Khulna University, Khulna. The larvae stocked under the different treatments were fed with different feeds administered those three times daily at 700, 330 and 12300 h. Sampling was done at every 7 days interval. Ten larvae were randomly collected from each aquarium to take the length and weight data. The weight (g) was taken in an analytical balance and the length (mm) was measured by placing the fry on a transparent petridish placed on a 1 mm graph-paper. Sampling was done before the application of feed to avoid the biasness of weight due to presence of excessive feed. During the experimental period following water quality parameters were measured e.g. temperature, pH, dissolved oxygen (DO) and alkalinity.

Source of Information: J. Bangladesh Agril. Univ. 10(1): 179–183, 2012, ISSN 1810-3030

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Aquarium business entrepreneurs in Bangladesh are involved mainly in variety of carp species culture. Business entrepreneurs are lacking the knowledge about the rearing and feeding of the ornamental koi carp. The results of the current experiment may be of some help for commercial aquarium business entrepreneurs.

Knowledge Management: Journal