Abstract
For sustainable development of aquaculture industry, it is important to apply biological method and biotechnology to treat the waste of aquaculture. In this paper, an airlift recirculating aquaculture system was designed and polychaete worms were cultured in it. According to the different food level experiments, the growth of Perinereis aibuhitensis was tested in each system with different feeding ratios according to food/total worms’ weight percentage. It was marked as M1, M2, M3, M4 and M5 respectively. The water parameters were also tested. The results showed that in the M3 groups, the production of P.aibuhitensis was the highest being 2.36 g/m2, while other groups exhibited negative production. Fed on the residual feeds and feces of flounder fish, the mean weight of worms increased to a maximum in M4, which was 1.570g and in M3, it was 0.986g in 40 days. The results provided a novel method to biologically utilize the waste of aquaculture.
Highlights
IntroductionWith the continuous development of aquaculture, environmental problems have been increasingly focused, which have become a major problem restricting the sustainable development of China's aquaculture
The methods of water chemistry parameters used the Chinese specification for marine monitoring—Part 4: Seawater analysis [8] in which the total nitrogen was tested by potassium persulfate oxidation-ultraviolet spectrophotometry method, ammonia was determined using the hypobromite method
The growth in the worms with different diet ratio under the temperature of 20°C is shown in Fig. (2-5)
Summary
With the continuous development of aquaculture, environmental problems have been increasingly focused, which have become a major problem restricting the sustainable development of China's aquaculture It is important for healthy development of aquaculture and sustainable use of resources to research the methods of effectively eliminating the rising environmental pollution, and to restore and optimize the breeding environment as soon as possible [2]. Polychaete is one kind of benthic polychaetes, which are widely distributed in the coastal beaches and estuarine areas. It has high economic value as the best marine bait [3], and has wide prospects for drug development in the ocean and other areas [4]. As a typical marine benthic fauna of deposited diet, polychaete eats detritus and transforms it into body’s energy [5]
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