Analysis of White Feces Disease (WFD) caused by Vibrio sp. Bacteria and Dinoflagellata in Vannamei Shrimp (Litopenaeus vannamei) in Brackishwater Culture Pond

Abstract

Highlight ResearchIndicated that white feces at Vanammei appeared along with the appearance of the disease besides its main trigger that is Vibrio sp.Increase the availability of carbon for photosynthesis process of phytoplankton.Clinical symptom of shrimp attacked by white feces disease is indicated by a change in intestine.AbstractShrimp disease that currently causes economic loss to shrimp farmers is White Feces Disease (WFD). This disease appeared due to several factors, such as poor pond management, unhealthy shrimp seed, and poor water quality which resulted in the appearance of Vibrio sp. bacteria and Dinoflagellate. This study aimed to analyze the cause of WFD outbreak in vannamei shrimp pond. The study method through direct experiment was applied in shrimp pond. Sampling was performed three times in each feeding tray to collect ten shrimps. Overall, sampling was performed twice a week. The Sample Survey Method was used to collect sample in this study. Result of study showed that clinical symptom was observed through changes in pattern and behavior of vannamei shrimp during culture. However, this observation resulted in insignificant data. Vannamei shrimp infected WFD tended to swim slower and often rose to the surface with body color turned red. Moreover, total organic matter (TOM) increased on week-7 along with the increasing growth of plankton, particularly from the Dinoflagellate group. However, bacterial growth of Vibrio sp. on week-7 was insignificant, yet many shrimps were found dead with white feces during that period. The result of analysis indicated that white feces disease was caused by Dinoflagellate besides the main trigger, namely, Vibrio sp.

Identification of pathogenic bacteria (Vibriosp) in the waters of the industrial area of north aceh regency and lhokseumawe city

“…extract was found in the white sea bass diet and was found to alter phagocytic activity when tested with Vibrio alginolyticus bacteri [38]. Apart from the primary trigger, Vibrio sp dinoflagellates are the cause of white feces sickness [39]. The distribution of phytoplankton is regulated by the physical and chemical characteristics of water, particularly the availability of nutrients [40].…”

Antibacterial activity of crude extracts Ulva lactuca against Staphyloccocus aureus and Propionibacterium acne

“…While at high concentrations of compounds, these compounds coagulate and the cytoplasmic membrane lysis. The mechanism of each of these phytochemical compounds synergizes with each other so as to increase their effectiveness and activity in inhibiting growth or killing bacteria [32,33]. The positive control indicated the formation of an inhibitory zone around the paper disc, so it could be seen that medi-clin had antibacterial activity that could affect the growth of the test bacteria.…”

The Livelihood Vulnerability of Vannamei Shrimp Culture as the Impact of Climate Change in Banyuwangi Regency, East Java Province, Indonesia

“…Vannamei shrimp (Litopenaus vannamei) is known as a fast-growing shrimp that can be cultured in high stocking density (Arsad et al, 2017). In aquaculture systems, physical and chemical parameters have a significant impact on organic and inorganic nutrients (Adam et al, 2022). The rise of sea levels, high temperatures, unpredictable weather, and too much rain has the greatest impact on shrimp production, with a loss of 10-30% or even 100% of shrimp income (Quach et al, 2017).…”