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Acta Aquatica: Aquatic Sciences Journal
Published by Universitas Malikussaleh
ISSN : 24069825     EISSN : 26143178     DOI : -
Core Subject : Science, Education,
Materials Science & Nanotechnology Other
Acta Aquatica: Aquatic Sciences Journal is a scientific open access journal in the field of aquatic sciences, published periodically (April and October) by the Institute of Research and Community Service (LPPM) Universitas Malikussaleh (Malikussaleh University) in cooperation with Marine Center Universitas Malikussaleh, Department of Aquaculture Universitas Malikussaleh and Department of Marine Science Universitas Malikussaleh. Acta aquatica are publish original research, overviews and reviews relating to aquatic environments (wetlands, freshwater and marine waters) and the border limits of these environmental systems and the impacts of human activities on the environmental systems. Acta Aquatica has a related studies in aquatic bioecology, aquaculture, hydrology, biodiversity of aquatic biosphere, oceanology, exploitation and exploration technology of aquatic resources, fisheries product technology, aquatic microbiology, aquatic modeling, aquatic geographic information systems, and socio-economic of aquatic resources.
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Articles 20 Documents
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Search results for , issue "Acta Aquatica, Vol. 12: No. 3 (December, 2025)" : 20 Documents clear
Feed enrichment with different oil sources on the growth and survival rate of Asian redtail catfish larvae (Hemibagrus nemurus) Parma, Jesika Nadiyah; Aryani, Netti; Nuraini, Nuraini
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 12: No. 3 (December, 2025)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v12i3.15999

Abstract

Asian redtail catfish (Hemibagrus nemurus) is one of the freshwater fish commodities with high economic value and already cultivated in Riau Province. Food that is given does not fully all the nutrition needed for larvae growth. One way to improve the feed quality is to enrich it with fish oil. This study aimed to determine the best oil sources in feed on the growth and survival rate of larvae. This research was conducted from August to September 2023 at the Fish Hatchery and Breeding Laboratory, Faculty of Fisheries and Marine Science, University of Riau. This study used the experimental method of Completely Randomized Design (CRD) with 5 treatments and 3 replicates. The treatments used were P1 (commercial feed,) P2 (shark oil 8%), P3 (pangasius catfish 8%), P4 (squid oil 8%), and P5(cod liver oil 8%). Larvae were reared for 40 days with a stocking density of 5 individuals/L. The result of the research showed that enrichment feed with different oil sources had a significant effect (P<0,05) on the growth of absolute weight, absolute length, specific growth rate, and survival rate. Enrichment of feed with squid oil results the higher growth than the other treatments with absolute weight of 0,71 g, absolute length of 3,06 cm, specific growth rate of 14,03%/day, and survival rate of 68,00%. Larvae’s response to feeding was very aggressive and nothing was left. Water quality parameters during the study were still in the good category for Asian redtail catfish with temperatures 28,7-30,1°C, pH 6,5-6,8 and dissolved oxygen 4,0-5,3 mg/l. Keywords: Asian Redtail Catfish Larvae; Enrichment food; Growth; Survival rate
Effectiveness of using liquid organic supplements (LOS) on the growth and survival of crayfish (Cherax quadricarinatus) Saputra, Dedy Nurwan; AS, Agus Putra; Febri, Suri Purnama; Nazlia, Suraiya
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 12: No. 3 (December, 2025)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v12i3.20239

Abstract

Aquaculture is an important sector in meeting global protein needs, where crayfish (Cherax quadricarinatus) has high economic potential. However, residual feed waste and degradation of the aquaculture environment often become major challenges, inhibiting growth and lowering the survival rate of crayfish. This study aims to analyze the effectiveness of using liquid organic supplements (LOS) in increasing the growth and survival of crayfish, as well as determining the optimal dose. The study used a completely randomized design (CRD) with four treatments and three replications with SOC doses of P1 = 0 ml/liter of water, P2 = 0.5 ml/liter of water, P3 = 1 ml/liter of water and P4 = 1.5 ml/liter of water. Parameters measured included absolute length growth, absolute weight, daily growth rate, and survival rate. The results showed that the provision of SOC had a significant effect on the growth of absolute length, absolute weight, and survival rate (P<0.05), but not significant on daily growth rate. The treatment with a dose of 1.5 ml/liter of water (P4) produced the best growth and survival performance, with an average absolute length growth of 1.3 cm, absolute weight of 0.58 grams, and a survival rate of 96%. The conclusion of this study is that SOC is effective for increasing the productivity of crayfish farming at a dose of 1.5 ml/liter of water. Keywords: Crayfish; Growth; Liquid Organic Supplement; Survival
Effectiveness of clove oil anesthesia on the performance and survival of Batak fish (Tor soro) fry during transportation Rumondang, Anne; Effendi, Irzal; Supriyono, Eddy
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 12: No. 3 (December, 2025)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v12i3.21223

Abstract

This study aimed to evaluate the effectiveness of clove oil as a natural anesthetic for Batak fish juveniles during transportation. The experiment was conducted using a Completely Randomized Design (CRD) with four treatment levels of clove oil: P0 (control/0 ml/l), P1 (0.01 ml/l), P2 (0.02 ml/l), and P3 (0.03 ml/l), each with three replicates. Observed parameters included physiological responses (induction time, recovery time, and behavior), survival rate, and water quality before and after transportation. The results indicated that clove oil significantly affected the physiological responses of Batak fish juveniles, although it did not significantly influence survival rates, which remained above 90% for all treatments. The optimal concentration was 0.01 ml/L, with an average induction time of 64 minutes and recovery time of 1.15 minutes. During transportation, water temperature increased from 27.48 °C to 29.53 °C, pH decreased from 7.22 to 7.17, and dissolved oxygen (DO) decreased from 5.38 mg/l to 5.32 mg/l. These changes remained within the tolerance range of Batak fish juveniles, thus not affecting survival. The findings demonstrate that clove oil effectively reduces physiological stress and maintains water quality, suggesting that it can be recommended as a safe, efficient, and environmentally friendly natural anesthetic for transporting Batak fish juveniles. Keywords: Anesthesia; Clove Oil; Survival Rate; Tor soro; Transportation
Water quality status of the Serayu Watershed (DAS) using the STORET method approach Hidayati, Nuning Vita; Condro, Abi; Jatmoko, Bambang Eko; Fikriyya, Nabela; Junaidi, Teuku; Hastuti, Dewi Wisudyanti Budi; Firdaus, Abdul Malik; Raharja, Ferry Cahya
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 12: No. 3 (December, 2025)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v12i3.21258

Abstract

The Serayu River Basin (DAS) spans 180 km and traverses several districts in Central Java, including Wonosobo, Banyumas, Banjarnegara, Cilacap, and Purbalingga. Significant pollution has been observed in the Serayu River Basin, with the primary sources of pollution being agriculture, industry, and community activities. The objective of this investigation is to evaluate the Serayu River Basin's condition in relation to the STORET method and Class I, II, III, and IV water quality standards, as well as physical and chemical parameters. Ex situ analysis of water samples was implemented through purposive random sampling in the survey methodology. Class I pollution levels in the Serayu River Basin are classified as Category D, which denotes substantial pollution, according to the STORET method. Class II is classified as Category C, which denotes moderate pollution, as indicated by a STORET index value of -26. Several research locations exhibit water parameters that exceed the quality standards, including pH, DO, COD, phosphate, and ammonia. In order to preserve the purity and condition of the Serayu River Basin, it is necessary for all stakeholders, including the community, to participate. Furthermore, the management of the Serayu Watershed necessitates the implementation of control strategies or efforts. Keywords: Basin; River pollution; Serayu; STORET; Water Quality
Antioxidant potential of endophytic bacteria on the bark of Rhizophora stylosa as a free radical scavenger Gumbirasari, Resa; Bachtiar, Eri; Rochima, Emma
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 12: No. 3 (December, 2025)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v12i3.21438

Abstract

Rhizophora stylosa mangrove contains secondary metabolite compounds with antioxidant potential, including those produced by endophytic bacteria within its bark tissue. This study aims to determine the antioxidant activity and secondary metabolite content of endophytic bacteria. The methods used include exploration and experimentation, with qualitative data (isolation, identification, mass culture, phytochemical tests) and quantitative data (total phenolic content and antioxidant activity). Endophytic bacteria were isolated from the bark of R. stylosa, cultured in bulk, and extracted using liquid-liquid extraction with ethyl acetate. Phytochemical tests were conducted to detect secondary metabolites, while total phenolic content was determined using the Folin-Ciocalteu method and measured with a spectrophotometer at 765 nm. Antioxidant activity was tested using the DPPH method at 500 nm and analyzed through linear regression to determine the IC50 value. Three isolates were obtained: RS1 (Gram-positive, cocci), and RS2 and RS3 (Gram-negative, bacilli). Phytochemical tests showed that all isolates contained triterpenoids, flavonoids, and phenols, while tannins were only present in RS1 and RS2. The highest phenolic content was found in RS3 (193.8431 mgGAE/g). IC50 values were 111.86 ppm (RS1, moderate), 82.01 ppm (RS2, strong), and 90.68 ppm (RS3, strong). Keywords: Antioxidant Activity; Endophytic Bacteria; Rhizophora stylosa
Comparative growth performance of Kappaphycus striatus and the green variety of Kappaphycus alvarezii under longline cultivation Muzahar, Muzahar; Raza’I, T. Said; Viruly, Lily; Wulandari, Rika; Miranti, Shavika; Putri, Dwi Septiani; Yulianto, Tri; Bakkara, Okto Rimandi; Irawan, Henky; Sinaga, Daniel; Nasmi, Jannesa; Andia, Bherly; Saputra, Rio; Bahri, Samsul; Lovina, Ronaldy; Darmawan, David; Syafiq, R. Muhammad
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 12: No. 3 (December, 2025)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v12i3.21565

Abstract

This study compares the growth of two seaweed species, Kappaphycus striatus and Kappaphycus alvarezii (green variety), using the longline method in the waters of Pelakak Village, Lingga Regency. This research aims to identify differences in daily growth rates and environmental factors affecting the productivity of both seaweed species. The study was conducted over 45 days using a randomized block design with two treatments and four replications. Measured parameters included absolute weight growth, specific growth rate, and water quality. The results showed that K. alvarezii (green variety) exhibited a higher daily growth rate (0.55% weight/day) compared to K. striatus (0.31% weight/day). Environmental factors such as temperature (28–30°C), salinity (30–31 ppt), and pH (7.1–7.4) were within the optimal range, but the current velocity (0.4–0.5 m/s), which exceeded the standard, potentially inhibited growth an increased the risk of talus damage. The t-student test indicated no significant difference in growth between the two seaweed species (p>0.05). These findings suggest that K. alvarezii (green variety) is more adaptive to local environmental conditions than K. striatus, although current velocity and pest presence remain challenges in seaweed cultivation. This study contributes to optimizing seaweed farming strategies in coastal areas. Keywords: Growth; Kappaphycus striatus; Kappaphycus alvarezii Green Variety; Longline
Visual documentation and biotopic distribution of opisthobranch species in the Akkum-Erdemli Region (Türkiye) Çete, Ertuğrul; Ayas, Deniz; Ergüden, Deniz
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 12: No. 3 (December, 2025)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v12i3.21704

Abstract

This study presents a preliminary assessment of opisthobranch sea slug diversity in the coastal waters of Erdemli-Akkum, located in Mersin Bay (Eastern Mediterranean, Türkiye). During exploratory scuba dives conducted between 2014 and 2015, seven species belonging to different opisthobranch groups were observed and photographed across a range of marine biotopes, including rocky substrates, sandy bottoms, and macroalgal assemblages. The recorded taxa include Goniobranchus annulatus, Flabellina rubrolineata, Flabellina affinis, Cratena peregrina, Elysia viridis, Aplysia depilans, and Syphonota geographica. These species represent a broad ecological and morphological diversity within the subclass Heterobranchia. The findings contribute to the growing faunistic inventory of opisthobranchs in the Eastern Mediterranean and highlight the ecological richness of the Akkum coastal area. The use of in situ photography proved valuable for documentation and visual identification, supporting future taxonomic and ecological studies. Keywords: Eastern Mediterranean; Mersin Bay; Nudibranchs; Opisthobranchia; Photographic records
Plankton community dynamics based on vertical gradients and transparency in Lake Rawa Pening Trismara, Belia Kharisma Balqis; Rahman, Arif; Jati, Oktavianto Eko
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 12: No. 3 (December, 2025)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v12i3.21897

Abstract

The eutrophic conditions of Rawa Pening waters results in the rapid growth of water hyacinth (Eichhornia crassipes). The uncontrolled presence of water hyacinth affects the intensity of sunlight entering the water column and affects plankton abundance. The purpose of this study was to determine the vertical distribution of plankton abundance, the main factors affecting plankton abundance, and plankton associated with light intensity. The study was conducted in January and July 2024 using survey methods, with a total of 3 stations and 2 depths (0 m and 1 m). The statistical analysis used was the t-test and simple linear regression, Pearson correlation test, and multivariate analysis using Nonmetric Multidimensional Scaling (NMDS) with envfit analysis. The results showed that depth did not significantly affect the abundance of phytoplankton and zooplankton, but sampling time in January and July had an effect on the abundance of phytoplankton. The types of phytoplankton found were Chloropyceae, Bacillariophyceae, Cyanophyceae, Zygnematophyceae, Trebouxiophyceae, Euglenophyceae, and Chrysophyceae, while the zooplankton found were Monogononta, Branchiopoda, and Maxillopoda. Phytoplankton abundance values ranged from 740,447 - 3,650,523 cells/L, while zooplankton abundance ranged from 0 - 3,335 ind/L. There was no significant (homogeneous) relationship between light intensity and phytoplankton abundance based on the results of NMDS and envfit association analysis. Nitrate levels significantly affected plankton abundance based on the r value (0.901) and R2 (0.812). Keywords: Abundance, Envfit, Plankton, Rawa Pening, Vertical Distribution
Specific Growth Rate (SGR), Feed Conversion Ratio (FCR), and Survival Rate (SR) of Nile tilapia (Oreochromis niloticus) fed probiotics (Probio-7) with different concentrations sarmin, Sarmin; Setyastuti, Aryanti Indah; Yudistira, Denny indra; Prasetyo, Dwi Yanuar Budi
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 12: No. 3 (December, 2025)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v12i3.21970

Abstract

This study aims to examine the effect of probiotic (Probio-7) supplementation on the Specific Growth Rate (SGR), Feed Conversion Ratio (FCR), and Survival Rate (SR) of Nile tilapia (Oreochromis niloticus). The research was conducted from January to March 2025 at the UNU Purwokerto Laboratory. An experimental method was used with a completely randomized design (CRD), consisting of 4 treatments and 3 replications. The treatments were: P1 (feed without probiotics), P2 (feed with 8 ml/kg probiotic), P3 (feed with 10 ml/kg probiotic), and P4 (feed with 12 ml/kg probiotic). The fish used were Nile tilapia (Oreochromis niloticus) with an average length of 6.53±0.35 cm and an average weight of 2.28±0.02 g. Feed was given at 08:00 and 16:00 until satiation. Stocking density was 15 fish per container filled with 15 liters of water, and the maintenance lasted for 30 days. The feed used was commercial pellet feed supplemented with probiotics according to the treatment, containing 32% protein. The results showed that the addition of probiotics (Probio-7) had a significant effect (P<0.05) on Specific Growth Rate (SGR), Feed Conversion Ratio (FCR), and Survival Rate (SR). Treatment P4 had the highest SGR value of 2.08±0.03 g, the lowest FCR of 0.33±0.02, and the highest Survival Rate (SR) of 84±7%. Keywords: Feed Conversion Ratio; Tilapia; Probiotics; Survival Rate
Macrozoobenthos diversity in the waters of Krueng Pasee River Rinaldi, Rinaldi; Yanto, Nopri; Muktitama, Asih Makarti; Nugrahawati, Anis; Sari, Cut Rozana; Khalil, Munawwar
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 12: No. 3 (December, 2025)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v12i3.22314

Abstract

Macrozobenthos is a sensitive water biota to changing water quality, it can give you an idea of the water conditions. The research was done by subtracting samples from the waters of the Pasee River and being analyzed in the lab. The abundance of macrozoobenthos on the various pasee rivers ranged between 140 ind / m2, the diversity index ranged from 2,039, the evenness index from 0,928, and the dominant index from 0.503. Of that value, it can be said that the water condition of the river is still good. Keyword: Abundance; Dominant; Evenness; Krueng Pasee; Macrozobenthos

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