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Publisher: Indonesian Aquaculture Society (Total: 1 journals) [Sort by number of followers]

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	Aquacultura Indonesiana

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Aquacultura Indonesiana
Number of Followers: 0

This is an Open Access Journal

Open Access journal
ISSN (Print) 2477-6939 - ISSN (Online) 0216-0749
Published by Indonesian Aquaculture Society

[1 journal]

Observation of Excess Air Discharge in the Budikdamber Pond Aeration
System on the Real Effect of Tilapia Fish Health (Oreochromis spp.)
- Authors: Asep Kostajaya, Billi Rifa Kusumah, Asep Rachmat, Ridwan Siskandar, Siti Yulianti, Fauzan Fathur Rahim
  Pages: 1 - 8
  Abstract: DO levels are needed by fish organisms for metabolic processes, so the value changes quickly. So, giving aeration all the time and siphonization every day is the best treatment in maintaining water quality for growth. However, a study revealed that there is a negative side to excessive aeration until it reaches a saturation point. The results of the study on the process and level of exposure related to gas bubble disease caused by hyperoxia. The first symptom is the presence of gas bubbles under the skin, gas bubbles appear on most of the fins, along the lateral line, gills and in the eyes. Currently, another research is being conducted to prove the real effect of excess aeration, specifically on the health of Tilapia in closed ponds at normal ambient temperatures. In the closed water pond system, air flow is given at 25 mg/L (first pool), 40 mg/L (second pool), and 54 mg/L (third pool), with variable treatment of feed, water quality (temperature & pH). , and the same volume. The focus of the type of fish that will be observed in this research is Tilapia, with a duration of observation for ± 1 month. The maximum DO measurement results at a normal ambient temperature of 25.6 °C pool water is 8.2 mg/L. The optimum DO level in the first pond that is aerated with an air flow of 25 L/m is ± 7.9 mg/L, the optimum DO level in an aerated pond with an air flow of 40 L/m is ± 8.1 mg/L, and the optimum DO level in an aerated pond with an air flow rate of 54 L/m is ± 8.1 mg/L. No matter how big the air flow from the aerator is put into the water, the DO level will not exceed the value of 8.2 mg/L as long as the water temperature is not lower than 25 °C. Tilapia in ponds containing the highest DO levels at normal ambient temperature conditions of this pond water (24.4 – 25.9 °C), grows and develops very well, in fact there is no adverse effect on health.
  PubDate: 2023-03-03
  DOI: 10.21534/ai.v24i1.290
  Issue No: Vol. 24, No. 1 (2023)
Salinity Effects on Growth and Nutritional Content of Newly Isolated
Microalgal with Potential Use in The Shrimp-Hatcheries
- Authors: Wa Iba, Abdul Muis Balubi, Lenore Martin, Michael A Rice, Gary H Wikfors
  Pages: 9 - 19
  Abstract: A two-week batch experiment was conducted on three newly isolated Indonesian microalgal strains (Kb1-2 identified as Chaetoceros sp., Kb1-3 and Kb1-5) and Tisochrysis lutea to determine salinity effects upon the growth, proximate composition and ω-3, eicosapentaenoic acidand docosahexaenoic acid, (EPA and DHA) and ω-6 (arachidonic acid /ARA) fatty acids. Salinity within each strain growth of all microalgae tested. The highest cell densities were observed in Indonesian strains, Kb1-3 on day 8 at 25 psu and Kb1-5 on day 10 at 35 psu. Salinity significantly affected the lipid, protein and carbohydrate content in all microalgae cultured. The highest total lipid content was found in T. lutea cultured at 30 psu (28.3 %) followed by Kb1-2 cultured at 20 psu (25.0 %) and T. lutea at 35 psu (24.8 %). Kb1-3 produced highest protein when cultured at 20 and 25 psu, decreasing at higher salinities of 30 and 35 psu, 44.7 and 39.2 % to 31.5 and 32.6 %, respectively, similar to T. lutea. Kb1-5 had higher protein at both 25 and 35 psu but showed lower protein levels at 20 and 30 psu. Indonesian strains showed almost a similar content of carbohydrate across culture salinities similar to T. lutea. Although all Indonesian microalgae contained important ω-3 (EPA and DHA) and ω-6 (ARA) fatty acids, concentrations were low in comparison to T. lutea. All Indonesian microalgal strains also contained the dicarboxylic acid (DCA), phthalic acid, which was not present in T. lutea.
  PubDate: 2023-03-11
  DOI: 10.21534/ai.v24i1.299
  Issue No: Vol. 24, No. 1 (2023)