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Comparative Study on Growth of Supermale Tilapia and Monosex Tilapia in Earthen Mini Pond

Gias Uddin Ahmed
Department of Aquaculture, Faculty of Fisheries, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh.

Habiba Aktar
Department of Aquaculture, Faculty of Fisheries, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh.

Sudristi Chakma
Department of Aquaculture, Faculty of Fisheries, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh.

Neaz Al Hasan
Department of Aquaculture, Faculty of Fisheries, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh.

Mohammad Shamsuddin
Department of Aquaculture, Faculty of Fisheries, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh.

Abstract/ Executive Summary:

An investigation was conducted to determine the comparative growth study of supermale tilapia and monosex tilapia in earthen mini ponds from May-July 2012. Four treatments were considered having two replicates. For supermale tilapia treatments were named as ST₁ and ST₂ and for monosex tilapia were MT₁ and MT₂ . All the fish were of same age group having mean body weight of 1.4 g. Feeding frequency in all the treatments were two times a day. Fish were fed diet at a rate of 30% of their body weight for the first thirty days that was gradually reduced to 15% for the next thirty days and 5% till the termination of the experiment. Final weight, weight gain, average daily weight gain, % weight gain and production of supermale tilapia were significantly (p<0.05) higher than those of monosex tilapia. But SGR (% day), FCR and survival rate of supermale tilapia were not significantly (p>0.05) varied. However, the result of the present study showed that the best weight gain of 124.85 g was observed in ST₁ after 90 days culture period. Average weight gain (g) were 1.39, 1.16, 1.14 and 1.05, SGR (per day) were 2.17, 2.09, 2.08 and 2.04%, FCR were 2.98, 2.65, 2.84 and 2.57, survival rate were 96, 94.50, 95 and 91% and fish production were 5053.92, 8926.10, 4108.07 and 7821.41 kg/ha in ST₁ , ST₂ , MT₁ and MT₂ respectively. The present research findings suggested that supermale tilapia has significantly high growth potential comp are to monosex tilapia under mini ponds culture condition.

Keywords: Growth, Monosex, Supermale, Tilapia, Mini pond

Location: Faculty of Fisheries, Bangladesh Agricultural University, Mymensingh

Start Date: 03-05-2011

End Date: 31-07-2011

Program Area: Variety and Species

Commodity: Tilapia

Objectives:

To study culture potential and growth variati on of supermale tilapia with those of monosex tilapia and culture feasibility of supermale tilapia in earthen mini ponds.

Methodology:

The experiment was conducted in eight experimental pond each of 0.65 dec which were located in the northern side of the Faculty of Fisheries, Bangladesh Agricultural University, Mymensingh. The study period was carried out for 90 days from 03 May to 31 July, 2012. The water depth was maintained at a level of 1.0 to 1.3 m. The ponds were equal in size and similar in shape, depth, basin configuration and pattern type including water supply facilities. Aquatic weeds, undesirable fishes, insects and other aquatic organisms were removed manually and the grasses on the pond dykes were also pruned manually into very small size. Lime was applied at a rate of 0.5 kg/dec. No fertilizer was used during pond preparation. Two treatments were considered for supermale tilapia and two treatments for monosex tilapia. In each treatment two replications were considered. Monosex tilapia fry were collected from Sarnalata Agro Fisheries Ltd., Radhakanai, Fulbaria, Mymensingh and super male tilapia fry were collected from the Brahmaputra Hatchery, Shamvuganj, Mymensingh. Fry were transpor ted by plastic drums having oxygen facilities and transferred to ponds. During stocking sufficient care was taken to reduce stress. Commercial pellet feed named “Quality Fish Feed” were selected for the study. At the beginning of the experiment feed was supplied at a rate of 30% (1^st month) of their body weight, 15% (2^nd month), 5% up to harvesting time. Half of the feed was supplied at 9:00 AM and remaining was supplied at about 5:00 PM.

The feed was supplied by spreading method. The experimental ponds were monitored everyday during feeding to observe the behavior of fishes. All the ponds were kept clean to provide hygienic condition. Water quality parameters such as temperature (ºC), dissolved oxygen (mg/l), pH and ammonia (mg/l) were recorded fortnightly. Parameters such as weight gain (g), average daily weight gain (g), percent weight gain, specific growth rate (SGR), food conversion ratio (FCR), survival rate (%) and production (kg/ha/yr) were calculated to evaluate the growth performances of fish. Fish sampling was done at fifteen days interval in the morning at around 7:30 AM to 8:30 AM. During each sampling, fish were caught by cast net and weight was taken by precision weighing balance. Data were kept for analysis of different parameters.

Source of Information: Res. Agric. Livest. Fish. Vol. 2, No. 1, April 2015: 167-173

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Proper training on culture of this new variety on mini ponds could help in poverty alleviation at rural farmer’s level. Income of the rural poor farmers could be increased through derelict household mini ponds brought under cultivation. All family members especially women can take participation in supermale tilapia culture and could contribute to family income.

Knowledge Management: Journal