Rearing of bloodworm (Marphysa Mossambica) in captivity for development of live feed for tiger prawn (Penaeus monodon)

Syuhaime @ Suhaimi Ahmat Ali, (2007) Rearing of bloodworm (Marphysa Mossambica) in captivity for development of live feed for tiger prawn (Penaeus monodon). Masters thesis, Universiti Malaysia Sabah.

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Abstract

This study was undertaken to determine the feasibility of rearing the bloodworm, Marphysa mossambica, and to examine the factors that support their growth in captivity. The aim was to develop a sustainable culture system for supply of this bloodworm to shrimp farming industry as an important component of maturation diet. Marine worms are natural items of shrimp diet and a growing number of evidences points towards the role of many of their biochemical constituents, including highly unsaturated fatty acids, sterols and hormones in stimulating gonad development, improving egg quality and fertility in shrimp. In this study, samples of the bloodworm were collected from the wild at 3 sampling stations in a Sembulan coastal area in Kota Kinabalu. The salient morphological features and taxonomic characteristics of bloodworm were examined. The habitat of bloodworm was analyzed and quality of sediment was investigated. The growth parameters were estimated on a monthly basis. The experimental trials involved determination of the effect of different diets, salinities and indoor/outdoor thermal conditions on growth of the bloodworm. The trials on diets and salinities were conducted at normal room temperature (24°C - 30°C) for 4 weeks. The polychaetes were offered diets constituted of different raw materials: decomposed mangrove leaves, seaweed (Sargassum sp.), poultry waste and a mixture of poultry waste and decomposed mangrove leaves (50:50). The salinity experiment involved exposure of the worm to 30, 20, 15, 10 and 5 ppt. The effect of temperature was examined by exposing the test specimens to indoor (30 - 22°C) and outdoor (33 - 24°C) conditions. The contents of protein, lipid, cholesterol, water content and ash of the wild bloodworm were determined . A normal linear regression of the annual length-weight relationship was obtained and the relationship between length and weight was strong . Feeding trials yielded interesting results. Poultry waste mixed with decomposed mangrove leaves produced the best results, with a daily growth rate of 13.67±2.42 mg/day compared to other treatments. Of all the salinity treatments, 10 ppt showed the best daily growth rate (18.29±3.31 mg/day). The data suggested that the bloodworm, an omnivorous scavenger, thrives best when diet comprises protein/nitrogen originating from decomposition of organic matter. The salinity treatments revealed that this marine polychaete is euryhaline and can survive in the range of 5 - 20 ppt, but a brackish water environment where salinity is 10 ppt provides a better condition for growth . The indoor rearing was better for growth and survival, and the temperature at 30°C seemed to be optimum for growth and maturity. Diet, salinity and temperature are just three of the many factors that determine the success of captive rearing of the bloodworm. Quality of sediment, bacterial count, rate of water renewal and sediment reworking conditions are among the other factors that deserve serious consideration.

Item Type:Thesis (Masters)
Uncontrolled Keywords:bloodworm, farming industry, maturation diet, biochemical constituent, fertility in shrimp, improving egg quality, gonad development, temperature
Subjects:Q Science > QL Zoology
Divisions:SCHOOL > Borneo Marine Research Institute
ID Code:6507
Deposited By:IR Admin
Deposited On:09 Jul 2013 11:23
Last Modified:09 Jul 2013 11:23

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