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All Journal Habitat: Jurnal Ilmiah Ilmu Hewani dan Peternakan
Dessyre Marlen Nendissa
Universitas Pattimura
Agriculture, Biological Sciences & Forestry

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Evaluation of Biofloc System Efficiency in Whiteleg Shrimp (Litopenaeus vannamei) Culture for Juvenile Growth and Survival Regina M Loppies; Edir Lokollo; Dessyre Marlen Nendissa
Habitat: Jurnal ilmiah ilmu Hewani dan Peternakan Vol. 2 No. 1 (2024): Februari : Habitat: Jurnal ilmiah ilmu Hewani dan Peternakan
Publisher : Asosiasi Riset Ilmu Tanaman Dan Hewani Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62951/habitat.v2i1.507

Abstract

Biofloc technology offers a promising strategy for improving production efficiency and environmental stability in intensive shrimp culture. This study evaluated the efficiency of a biofloc system compared with a conventional system based on the growth, feed utilization, survival, final body weight, and water quality of juvenile whiteleg shrimp (Litopenaeus vannamei). A quantitative experimental design was applied using two culture treatments, each consisting of three independent replicates. Juvenile shrimp with relatively uniform initial body weights were maintained for 60 days under standardized stocking density, feeding management, aeration, and culture conditions. The observed parameters included absolute weight gain, average daily growth, specific growth rate, final body weight, survival rate, feed conversion ratio, temperature, pH, dissolved oxygen, salinity, ammonia, and nitrite. Data were analyzed descriptively and comparatively using an independent-samples t test or Mann–Whitney U test according to data distribution. The biofloc system produced higher growth, final body weight, and survival than the conventional system while generating a lower feed conversion ratio. It also maintained higher dissolved oxygen and lower ammonia and nitrite concentrations. Temperature, pH, and salinity remained comparable between treatments. These findings demonstrate that biofloc technology can improve feed utilization, control nitrogenous waste, and provide more stable environmental conditions for juvenile whiteleg shrimp. Its application should be accompanied by careful management of aeration, carbon inputs, and suspended solids.  
Relationship Between Pond Water Physicochemical Parameters and the Health and Productivity of Nile Tilapia (Oreochromis niloticus) in a Polyculture System Edir Lokollo; Dessyre Marlen Nendissa; Dwight Soukotta
Habitat: Jurnal ilmiah ilmu Hewani dan Peternakan Vol. 3 No. 1 (2025): Februari : Habitat : Jurnal ilmiah ilmu Hewani dan Peternakan
Publisher : Asosiasi Riset Ilmu Tanaman Dan Hewani Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62951/habitat.v3i1.509

Abstract

Water quality is a fundamental determinant of fish health, growth, feed efficiency, and survival, particularly in polyculture systems where biological interactions and organic-waste accumulation can increase environmental variability. This study aimed to analyze the relationships between pond-water physicochemical parameters and the health and productivity of Nile tilapia (Oreochromis niloticus) cultured in a polyculture system. A quantitative correlational design was applied over a three-month observation period. Temperature, pH, dissolved oxygen, ammonia, and nitrite were measured routinely using calibrated instruments. Fish health was assessed through hematocrit and leukocyte levels, while productivity was evaluated using final body weight, feed conversion ratio, and survival rate. Data were analyzed using descriptive statistics, correlation analysis, and multiple linear regression. The findings showed that dissolved oxygen and ammonia were the most influential water-quality parameters. Higher dissolved oxygen was associated with better hematological condition, increased final body weight, more efficient feed utilization, and higher survival. Conversely, elevated ammonia was associated with increased physiological stress, reduced growth, poorer feed conversion, and lower survival. Temperature, pH, and nitrite demonstrated weaker relationships but remained important for maintaining environmental stability and supporting fish metabolism. These findings emphasize the importance of integrated water-quality management through regular monitoring, appropriate feeding, adequate aeration, stocking-density control, and organic-waste management. The study provides a practical foundation for adaptive pond management that can improve fish welfare, production efficiency, and the sustainability of Nile tilapia polyculture systems.
Interactive Effects of Water Temperature and Stocking Density on the Growth and Survival of Asian Seabass (Lates calcarifer) Larvae in a Recirculating Aquaculture System Beni Setha; Dwight Soukotta; Dessyre Marlen Nendissa
Habitat: Jurnal ilmiah ilmu Hewani dan Peternakan Vol. 3 No. 2 (2025): Agustus : Habitat : Jurnal ilmiah ilmu Hewani dan Peternakan
Publisher : Asosiasi Riset Ilmu Tanaman Dan Hewani Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62951/habitat.v3i2.510

Abstract

The production of high-quality Asian seabass (Lates calcarifer) seed is strongly influenced by environmental management during the larval stage. Water temperature regulates metabolic activity, feeding, digestion, and development, whereas stocking density affects competition, stress, water quality, and survival. This study evaluated the individual and interactive effects of water temperature and stocking density on the growth and survival of Asian seabass larvae cultured in a recirculating aquaculture system. A completely randomized factorial design consisting of three temperature levels and three stocking densities was applied. The nine treatment combinations were independently replicated three times using separate recirculating culture units. Specific growth rate, weight gain, length gain, survival, mortality, size variation, and water-quality parameters were measured during the culture period. Data were analyzed using two-way analysis of variance followed by multiple-comparison testing. Water temperature and stocking density significantly affected larval growth and survival, and a significant interaction occurred between the two factors. The highest individual growth and survival were obtained at 30 °C and 10 larvae/L. However, the combination of 30 °C and 20 larvae/L provided the most balanced operational performance by maintaining high growth and survival while improving tank utilization. Larvae maintained at 32 °C and 30 larvae/L exhibited the lowest growth and survival, the highest mortality and size variation, reduced dissolved oxygen, and greater nitrogenous-waste accumulation. These findings demonstrate that temperature and stocking density should be managed jointly according to RAS treatment capacity. Maintaining an appropriate temperature–density combination can improve larval health, seed-production efficiency, fish welfare, and the environmental sustainability of Asian seabass hatcheries
Co-Authors Beni Setha Dwight Soukotta Edir Lokollo Regina M Loppies