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All Journal Fauna: Jurnal Kajian Ilmu Hewani Habitat: Jurnal Ilmiah Ilmu Hewani dan Peternakan
Edir Lokollo
Universitas Pattimura
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology

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Evaluation of Heavy Metal Pollutant Exposure on Kidney Histological Structure and Renal Function in Common Carp (Cyprinus Carpio) from Urban Waters Dwight Soukotta; Cindy Regina M Loppies; Edir Lokollo
Fauna: Jurnal Kajian Ilmu Hewani Vol. 2 No. 1 (2024): Juni : Fauna : Jurnal Kajian Ilmu Hewani
Publisher : Asosiasi Riset Ilmu Tanaman Dan Hewani Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62951/fauna.v2i1.497

Abstract

Heavy metal contamination in urban aquatic environments represents an important threat to fish health because persistent metals can bioaccumulate and induce structural and functional alterations in vital organs. This study aimed to evaluate the association between lead (Pb), cadmium (Cd), and mercury (Hg) exposure and renal histopathological alterations in common carp (Cyprinus carpio) from contaminated urban waters. A quantitative observational comparative approach was applied by examining fish from contaminated and reference sites. Heavy metal concentrations were determined in water and kidney tissues, while renal alterations were assessed through Hematoxylin–Eosin histopathology and semi-quantitative lesion scoring. Urea and creatinine were evaluated as complementary renal indicators, and correlation analysis was performed to examine associations among metal burdens, tissue damage, and biochemical alterations. Fish from contaminated sites exhibited higher metal accumulation and more severe tubular degeneration, epithelial vacuolation, tubular necrosis, glomerular abnormalities, vascular congestion, and inflammatory responses. Heavy metal concentrations were positively associated with renal damage severity, with cadmium showing the strongest relationship. These findings demonstrate that integrating metal accumulation, renal histopathology, and biochemical indicators provides a comprehensive approach for assessing contaminant-associated fish health and supports common carp as a potential sentinel species for urban freshwater biomonitoring.
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.
Co-Authors Cindy Regina M Loppies Dessyre Marlen Nendissa Dwight Soukotta Regina M Loppies