Slamet Budi Prayitno
Postgraduate program on Aquatic Resource Management, Faculty of Fisheries and Marine Science, Diponegoro University, Jl. Prof. H. Soedarto, S.H, Tembalang, Semarang, Jawa Tengah

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Behavior responses and survival of snakehead fish (Channa striata) broodstock during acclimatization Nurul Aziz; Slamet Budi Prayitno; Alfabetian Harjuno Condro Haditomo; Tristiana Yuniarti; Sri Hastuti; Eirnest Dave Son R. Eliver
Sains Akuakultur Tropis : Indonesian Journal of Tropical Aquaculture Vol 10, No 1 (2026): SAT edisi Maret
Publisher : Departemen Akuakultur FPIK UNDIP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/sat.v10i1.31118

Abstract

Post-transport acclimatization is a critical phase in broodstock management, particularly for stress sensitive species such as snakehead fish (Channa striata). This study evaluated behavioral responses, feeding activity, and survival of snakehead broodstock during the first 24 hours of acclimatization following transport. The study employed a descriptive exploratory design using nine acclimatization units, with behavioral exploration conducted at two time points immediately after stocking (T0) and 24 hours post-stocking (T24). Behavior responses recorded included erratic swimming, hitting against walls, jumping, gasping, and rubbing, which were quantified during a 10 minute exploration period. Feeding response and survival rate were assessed at T24, while water quality parameters were monitored throughout the acclimatization period.The results showed that all behaviors responses were prominently expressed at T0, indicating acute stress responses following transport and handling. After 24 hours of acclimatization, a general reduction in the frequency of erratic swimming, hitting against walls, jumping, and rubbing was observed, suggesting partial behavioral recovery and adaptation to the new environment. In contrast, gasping behavior persisted with relatively minor changes, indicating that respiratory adjustment may require a longer recovery period. Feeding responses emerged in several acclimatization units at T24. Survival rates during the first 24 hours ranged from 80% to 100%, with an overall survival rate of approximately 92%. Water quality remained within tolerable ranges for Channa striata and was not considered a primary factor of behavioral variation or mortality. These results indicate that the first 24 hours post-transport represent a critical phase characterized by behavioral responses. Behavioral indicators, combined with feeding response and survival, provide a practical and non-invasive approach to assessing acclimatization success and fish welfare during the early post-transport period in snakehead broodstock
Dynamics of Dissolved Oxygen Release from Hydrogen Peroxide Under Different Temperature Regimes in Closed System Viola Nur Maghribfa; Slamet Budi Prayitno; Desrina Desrina; Sri Hastuti; Kanya Wijaya; Alfabetian Harjuno Condro Haditomo
Sains Akuakultur Tropis : Indonesian Journal of Tropical Aquaculture Vol 10, No 2 (2026): SAT September edition
Publisher : Departemen Akuakultur FPIK UNDIP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/sat.v10i2.33328

Abstract

Dissolved oxygen (DO) is an important parameter in aquaculture systems as it directly influences water quality stability and the biological activity of aquatic organisms. This study aimed to evaluate the dynamics of dissolved oxygen resulting from hydrogen peroxide decomposition under different temperature conditions in a closed system. The experiment was conducted at two temperature regimes, namely 25°C and room temperature (27–28°C), using hydrogen peroxide doses of 0 mL/L, 0.025 mL/L, 0.050 mL/L, and 0.075 mL/L. Observations were carried out over a 24-hour period, with measurements recorded every two hours. The results showed that the addition of hydrogen peroxide increased dissolved oxygen levels during the first four hours, after which the values tended to stabilize. At room temperature, dissolved oxygen fluctuations were higher compared to those at 25°C. The presence of fish in the water medium resulted in a more rapid increase in dissolved oxygen, starting from the first hour of observation. This indicates that biological activity accelerates hydrogen peroxide decomposition. However, dissolved oxygen gradually decreased over time in treatments with fish due to oxygen consumption by organisms and associated microbial activity. Water quality parameters indicated that temperature remained relatively stable throughout the observation period, whereas pH tended to decrease over time, particularly in treatments with fish. This decline is likely due to carbon dioxide accumulation resulting from respiration. Overall, the findings demonstrate that temperature and biological activity are the main factors influencing dissolved oxygen dynamics and the rate of oxygen release from hydrogen peroxide in a closed system.