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Development of Broods for Mass Seed Production of Striped Mullet, Mugil Cephalus

Muhammad Zaher
Chief Scientific Officer
Marine Fisheries & Technology Station, Bangladesh Fisheries Research Institute, Cox's Bazar

Ehsanul Kari,
Scientific Officer
Marine Fisheries & Technology Station, Bangladesh Fisheries Research Institute, Cox's Bazar

Mohammad Ashraful Haque
Scientific Officer
Marine Fisheries & Technology Station, Bangladesh Fisheries Research Institute, Cox's Bazar

Md. Shahzad Kuli Khan
Scientific Officer
Marine Fisheries & Technology Station, Bangladesh Fisheries Research Institute, Cox's Bazar

Abstract/ Executive Summary:

Striped mullets (Mugil cephalus) of 60 g were stocked in earthen ponds @ 40, 60 and 80 juveniles/40m² in three treatments T₁, T₂ and T₃, respectively for a period of 240 days. Water quality parameters such as, water temperature ranged from 27.5°C to 29.9 °C; pH from 7.8 to 8.7; dissolved oxygen for 5.1 mg/l to 6.2 mg/l and total alkalinity from 90 mg/l to 145 mg/l. There were no significant differences in water temperature and total alkalinity among the treatments (p<0.05). The differences in pH and dissolved oxygen in all three treatments were highly significant (p<0.05). Highest survival rate 86% was found with low stocking density and lowest 68% was found with highest stocking density. Total production ranged from 3,625 kg/ha in low stocking density to 4,759 kg/ha in high stocking density. The differences in all growth parameters were highly significant (p<0.05).

Keywords: Broods for mass seed production, Striped mullet, Mugil cephalus

Location: Cox's Bazar

Start Date: July 2008

End Date: June 2013

Program Area: Variety and Species

Commodity: Aquatic animal

Objectives:

Examination of reproductive biology of the striped mullet; selection of suitable diet(s) for the brood stock of striped mullet; development of brood stocks for induced breeding of striped mullet.

Methodology:

The experiment was conducted for 8 months in three ponds of the Samriddhi Fish Farm, S.M Para, Cox’s Bazar Sadar. The ponds that were selected for this study were of 40, 50 and 60 decimals respectively and were marked as T₁, T₂ and T_3. All of the ponds were equal in depth, configuration and pattern including water supply facilities and also having well organized inlet and outlet system to maintain suitable water level. The water depth was maintained at a maximum of 1.4 m. To fulfill the objective of determining the optimum stocking density and its effect on the growth and production in pond culture system an average of 60 g sized juveniles were stocked in ponds with the ratio of male 60: female 40. Sampling (fish's health, length and body weight) of striped mullet was conducted regularly once in a month and the final harvest was done after 240 days of culture.

Source of Information: Annual Research Program 2012-13. BFRI, Mymensingh.

Article Link (Online Journal):

Funding Source:

1. Government

Budget: Twenty five lakh sixty five thousand

Total Budget (Tk.) : Twenty five lakh sixty five thousand

Achievement/Findings:

A total of 100 numbers of sub-adult/adult striped mullet weighing 400g each in average have been rearing in two saline water ponds at the pond complex at Marine Fisheries & Technology Station, Cox's Bazar. Two types of feeds used in two ponds, i.e. (1) Handmade containing 30-32% Protein and (2) Pellet Feed (Niribili Tilapia Feed having 30% Protein), both feed fed @ 3% of their body weight. Water quality,fluctuations of temperature, dissolved oxygen and pH were within the good limits of striped mullet's rearing condition. The fish looks very healthy and hopefully it will show the external features of sexual maturity in the coming December, 2013 to February, 2014. PG collection & gonadal study of Mullet also collection of wild live broods are going on by collecting live/dead mullets from wild.

Knowledge Management: Report/Proceedings