International Journal of Aquaculture, 2025, Vol.15, No.3, 149-154 http://www.aquapublisher.com/index.php/ija 152 flow and there must be enough oxygen so that the silk worms do not die. According to Ngatung et al. (2017), apart from probiotics and tofu dregs, water circulation also influences the increase in biomass in cultivating silk worms. Water circulation also has a significant effect on the maintenance of silk worms. Figure 4 Water quality data used for recirculation of silkworm maintenance media Febrianti (2004) in Hidayat et al. (2016) stated that giving different doses to the maintenance media will directly affect the organic matter content in the media. In addition to being influenced by the addition of probiotics and molasses, the difference in value is also caused by the difference in mud height in the silk worm maintenance media in treatment A, the mud height is 5 cm and in treatment B 4 cm, due to the low productivity value in treatment B, namely Silk worms do not get enough nutrients to grow and develop, as well as the availability of organic matter in the media that is inadequate until harvest time. This is in accordance with the research of Bintaryanto and Taufikurohman (2013) which states that the decrease in biomass and productivity of silk worms is caused by a lack of nutrients needed by silk worms to grow and develop, resulting in intense food competition, which ultimately causes death between individuals. According to Mi’raizki et al. (2015) explained that tubifex cultivation in open areas causes Chironomous and other competitors that also eat bacteria, microalgae and detritus, this can affect biomass growth and crop failure. In addition, according to Safrudin et al. (2005) in Mi’raizki et al. (2015) the decrease in the number of silkworms in treatment B is suspected due to the failure of young worms to maintain survival. Silk Worm Population is the total number of individual silk worms living in a certain area. Silk worms are a species of freshwater worms that are often used as fish feed (Febrita et al., 2015). Increasing the maintenance media with balanced doses can increase the availability of organic materials dissolved in mud for silkworms and can increase productivity values. According to Suryadin et al. (2017) silkworm productivity will increase along with the increase in media thickness until reaching a certain point will increase silkworm productivity, because the composition between mud, probiotics and molasses is balanced. According to research by Putra et al. (2022), variations in the population produced by silkworms in each container are caused by differences in the biological abilities of silkworms that were introduced at the beginning of the study, namely the number of eggs, hatching rate, and individual growth rate. According to Kusumorini (2017), adult individuals began to experience death and young individuals were not yet able to reproduce further, decreasing the number of silkworm individuals. Research by Mewekani and Tampobulon (2019), shows that silk worms develop well at temperatures of 26.5 °C~29 °C. In treatment B, the temperature was still in optimal conditions, namely 25.7 °C (start of stocking) and the temperature at the time of harvest which was carried out in the afternoon was 29.7 °C. The high fluctuation of water temperature in the afternoon is due to the hot weather during the day. The physiological system of silk worms can be influenced by changes in water temperature. According to Shafrudin et al. (2005)
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