Mulis, Sitty A. Habibie
Vannamei ponds in the Mootilango Village is one of the local activity centers (LAC) developing shrimp farm cultivation in the Pohuwato Regency. The location has a high land and water potential, good soil quality and a small pollution burden because the surrounding industrial activities have not been intensively developed. This study aimed to determine the physical and chemical parameters of the water and plankton community of Litopenaeus vannamei ponds run by farmers in the Mootilango Village, Duhiadaa Subdistrict, Pohuwato Regency Gorontalo. The research was conducted in June 2021 using a survey method. Water and plankton sampling was collected at five stations representing shrimp farming ponds’ inlet, central and outlet areas. The studied water quality parameters consisted of: physical parameters, i.e., temperature, brightness, conductivity, total suspended solids (TSS) and total dissolved solids (TDS), while the chemical parameters were: pH, dissolved oxygen (DO), salinity, nitrate (NO3), ammonia (NH3), phosphorus (P) and biological oxygen demand (BOD). In addition, plankton community parameters include: plankton density, plankton diversity, dominance index, and uniformity index. The results of the study generally showed that, according to the values of the pond water quality parameters in Mootilango Village, the ponds were in good condition and suitable for the cultivation of L. vannamei shrimp, with a DO value >4 mg L-1, a water brightness of 30–40 cm, a salinity of 5–35 mg L-1 and water ammonia levels of 0.17–3.00 mg L-1. The value of plankton’s diversity index (H’) at the research site ranged from 3.398 to-4.041, indicating that the plankton community’s stability was in excellent condition (stable). While the dominance index (D) ranges from 0.087 to-0.163 and the uniformity index (e) was of 1.044–1.200, which indicates that within the community structure there are no species that significantly dominate other species and the existence or density of even biota is uniformly distributed. © 2022, BIOFLUX SRL. All rights reserved.
Faculty of Fisheries and Marine Sciences, Gorontalo State University, Gorontalo, 96128, Indonesia
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