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Rearing and Production Performance of Freshwater Mud Eel, Monopterus Cuchia in Different Culture Regimes

Md. Faruque Miah
Department of Genetic Engineering and Biotechnology, Shahjalal University of Science and Technology, Bangladesh

Hafij Ali
Department of Genetic Engineering and Biotechnology, Shahjalal University of Science and Technology, Bangladesh

Enaya Jannat
Department of Genetic Engineering and Biotechnology, Shahjalal University of Science and Technology, Bangladesh

M. Niamul Naser
Department of Zoology, University of Dhaka, Bangladesh

Md. Kawser Ahmed
Department of Oceanography, University of Dhaka, Bangladesh

Abstract/ Executive Summary:

This experiment was conducted to study the effect of different environments on rearing and production performance of freshwater mud eel, Monopterus cuchia. The study was conducted over a period of six months from June to November 2013. Different environments such as House tanks, Earthen ditches, Plastic tank and Back yard tanks were used. Except the earthen ditch-2 (control), all environments were fed by different biological food such as small live fish (Tilapia fry), earth worms, small dead fish, snails, small frogs and chicken viscera in different amounts. 40 fishes (approximately 1kg in weight) were stocked into each of the environment. At the end of the experiment, the highest mean of final length (32.89±2.65423) and final weight (109.69±2.92777) were obtained in earthen ditch-1. The weight gain in length 17.78 ± 0.24 and in weight 85.07 ± 0.15 with 92.5% survival and production (4.07kg) were also highest in earthen ditch-1. However, earthen ditch-2 which was used as control has also shown satisfactory results in terms of weight gain in length and weight 14.1 ± 0.48 and 66.66 ± 0.82 respectively with 87.5% survival. On the other hand, the lowest mean growth considering final length (28.45±2.80092) and weight (67.24±3.79328) were recorded in house tank-2 while the weight gain in length (11.86 ± 0.26) and in weigh (41.84 ± 0.59) were also observed in house tank-2 with the production of 2.02kg by 75% survival. Based on Pearson Correlation coefficient there were no significant correlations between lengths and weights of fish in different culture regimes. Significant value (P=0.000) of each of the environments implies that M. cuchia can be reared significantly except back yard tank-1 (P=0.009). But, in case of earthen ditch-1 the highest value was found in both length and weight with 5% significance level due to supplied live feeds. On the basis of the better growth, survival and production, it is suggested that the earthen ditch is one of the suitable culture environments of M. cuchia. From this study, it was also found that the live feed are suitable for obtaining highest growth performance based on the findings of plastic tank, house tanks 1 and house tank 3.

Keywords: Monopterus cuchia, Rearing, Culture Environments, Production

Location: Department of Genetic Engineering and Biotechnology (GEB), Shahjalal University of Science and Technology (SUST), Sylhet

Start Date: 00-06-2013

End Date: 00-11-2013

Program Area: Animal Health and Management

Commodity: Eel

Objectives:

To study the effect of different environments on rearing and production performance of freshwater mud eel, Monopterus cuchia.

Methodology:

Experimental Set up and Sample Collection: Like some previous works the experiment was conducted in three tanks in the Fish Breeding House under the Department of Genetic Engineering and Biotechnology (GEB), Shahjalal University of Science and Technology (SUST), Sylhet. In addition, two earthen ditches and two backyard tanks were selected in a rural house, Chatak, Sunamgonj. Experiment with a plastic tank was designed in a pond of tilapia hatchery at Kamal Bazar, Sylhet. The fingerlings of this freshwater mud eel were collected from the “Seven Star Motso Arot”, Rashidpur Bazar, about 15 kilometers away from Sylhet. Fish were identified as mud eel by external morphology and also by the help of local fisherman. The fish were put into a plastic cage with some water and brought to the fish breeding house of the Department of GEB, SUST carefully. Collected fish fries were divided into six categories and placed in different places such as house tanks, earthen ditches, backyard tanks and plastic tank. In each place approximately 1kg fish equal 40 individuals in number was released. Shelter Management and Stocking Density: Three cemented tanks in breeding house were selected for part of this experiment. The length, width and height of each tank were 1 x 1.5 x 1 meter. Tanks were connected with regular water supply and maintained water depth in each tank with 13-15 inch. First of all, three tanks were filled with water and kept as it is for two days without fish. Then, after two days fish were placed in each tank. Two earthen ditches were selected near of a rural house, Chatak, Sunamgonj which was already made. The length, width and depth were around 42 meter with 18-24 inches depth. The earthen ditches were filled with water and maintained with 24 inch for two days without fish. One tank was constructed with bamboo and lined with plastic and measure with 1 x 1.5 x 1.5 meter which was settled down in experimental pond of tilapia hatchery at Kamal Bazar, Sylhet. In this case pond water was used for rearing fish considering 15 inch of water depth. There were water-hyacinth placed to cover the fish. Two backyard tanks were selected in the back place of a house and the length, width and height of each tank was 1 x 1.5 x 0.5 meter respectively filled with 10-12 inch of water. An amount of 1kg (40 in number) of fish was placed in each shelter. But before releasing the fingerlings, initially fishes were measured for all environments considering length and weight of fish. Water Management for all the Culture Systems: Before construction of any culture environment, it is wiser to think about water management system including source, discharge and quality of water. For culturing fish it is necessary to supply water regularly and without water it is quite difficult to maintain fish in alive. In this experiment different captive environments were used. Different sources of water were used for the different culture systems. Water temperature, pH and dissolved oxygen level were recorded through the experiment. For breeding house tanks, water was supplied through pipes from the submerge system. Each tank was well designed and water level was maintained about 13-15 inches. Water was exchanged within three days interval. Natural water was used for earthen ditches considering 18-24 inches deep, however, when needed water was supplied from outside. In Plastic tank, water was maintained around 15 inches and water was changed weekly by bucket from pond. In case of backyard tanks, water was supplied from the pond by plastic bucket considering 10-12 inches of deep and water was exchanged biweekly. Sometimes algae and tiny moss were used in backyard tanks and plastic tank. Supplied Feed: In this experiment different types of feeds were given to the different environments for rearing and production of M. cuchia. Different types of feed such as small dead fish, earth worms, small live fish (Tilapia fry), snails, small frog and chicken viscera were given where few are related to the two previous works. Feed were supplied to each of the different environment in different amounts. Two people were appointed for looking after fishes that were placed outside the SUST campus. Some instructions were given them to supply food in different amounts. Every time feed were given at the morning at 9 am and alternate food was supplied. Tilapia fry was used as feed and given weekly at the morning. Statistical Analysis: To compare the significance of the findings, paired sample statistics for mean and standard deviation, paired sample correlations and paired sample significance test were calculated for the growth of experimental fish considering length and weight data from different environments. The statistical data was analyzed with Duncan’s Multiple Range Test at 5% significance level by using Microsoft Excel Software.

Source of Information: Advances in Zoology and Botany 3(3): 42-49, 2015

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Achievement/Findings:

On the basis of the better growth, survival and production, it is suggested that the earthen ditch is one of the suitable culture environments of M. cuchia. From this study, it was also found that the live feed are suitable for obtaining highest growth performance based on the findings of plastic tank, house tank 1 and house tank 3.

Knowledge Management: Journal