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Preliminary studies on the effects of animal manure on bacterial disease of fish

Establishment of a Network of Aquaculture Centres in Asia

Year of publication 1987

Pages p. 9

Author Ding Jinyi, Guo Xianzhen,Fang Xiuzhen and Liu Meizhen;Fisheries and Aquaculture Management Division

Product type Project

Edition 1

Synopsis (short abstract) Although China has a long history of utilizing animal manure for fish farming, little is known about its effect on environmental sanitation. It is well known that animal manure fertilizes pond water and helps increase fish production. However, it may give rise to pathogenic microorganisms and parasites and cause water pollution. It has been observed that the use of animal manure increases the possibility of transfer of the parasites of pathegenes to humans. Studies have been undertaken to observ e the relationship between fish-livestock farming system and the health of human beings in the Philippines and the United States, but little is known about the effects of animal manure on bacterial diseases in fish. Freshwater fish in China suffer most commonly from bacterial diseases such as Albinoderma, Erythroderma, Furunculosis, Stigtomatosis and verticle-scale disease, caused by Aeromonas and Psecudomonas. This study deals deals mainly with the possible effect of manure application : on bac terial diseases of fish particularly caused by Aeromonas sp. and Pseudomonas sp. Also observations were made on the occurrence of these bacteria in the manure, in pond water and in fish skin mucus.

Language English

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    Preliminary studies on the effect of livestock manure application on bacterial fish disease and human hygiene
    Network of Aquaculture Centres in Asia
    1988
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    An investigation on the effect of application of livestock manure, the biomass of aerobic heterotrophic bacteria and Colicin population and distribution of Aeromonas, Pseudomonas and pathogenic bacteria of the human digestive tract which are also present in the body mucus of black carp, grass carp, silver carp and bighead carp as well as in pond water (on the application of manure of chicken, duck, cow and pig) was conducted in the fish farming areas in Wuxi, China. The results show less frequen cy of fish pathogenic bacteria in the four kinds of manure. Aeromonas and Pseudomonas population were, however, higher in the manured pond water than in the non-manured pond. Although there was less amount of fish pathogenic bacteria in the animal manure, body mucus of black carp and grass carp which well in the pond bottom and mid-level can cause the occurrence of Pseudomonas, is one of the pathogens of Stigamatosis, due to the decomposition manure in the pond bottom. With the exception of chic ken manure in which there was Group E Salmonella, no other pathogenic bacteria was found in the manure of duck, cow and pig. None was found either on the fish body nor in the fish viscera in the manure-applied fish pond. Bacteria were pathogenic. The fish cultured in the manure-applied pond were descaled and washed, the quantity of Colicin was reduced by 100–1000 times, the concentration of which was almost the same as that in the manure-free pond. MPN was less or equal to 40***(*** MPN.--- The most Probable number of Colicin within sq. sm of fish body. Results indicated that the fish cultured in manure-applied ponds after treatment by washing are hygienic as human food and not harmful to human health.
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    Project
    Preliminary studies on the effects of three animal manures on the ecological conditions of pond water and fish growth
    Establishment of a Network of Aquaculture Centres in Asia
    1983
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    The use of organic manure in aquaculture is one of the main inputs in the Chinese system of integrated fish farming. Although many scientists in China and elsewhere have done much work on the effects of animal manure on aquaculture production (Chen Qiyu et al, 1982, Buck, 1978. 1979; Schroeder 1978, 1980; McGeacin et al, 1982; Stickney, 1977; Jhingran et al, 1980; Edwards, 1980; Zweig, 1981), little is known of the series of physical, chemical and biological processes which are taking place in a pond after application of manure. The complexity of energy recycling needs further studies. The aim of this study is to determine the independent contribution of three animal manures to changes in the ecological condition of pond water and fish production. The results to be obtained may provide the scientific basis for further research on the use of organic manure in fish culture.
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