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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.
Arjuna Subject : -
Articles 341 Documents
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Diversity of fish in Kuala Langsa Waters Langsa City Razi, Fakhrur; Isma, Muhammad Fauzan; Febri, Suri Purnama; Putriningtias, Andika
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 12: No. 1 (April, 2025)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v1i1.11629

Abstract

The purpose of this study was to identify the diversity of fish species based on the waters in Kuala Langsa Village and provide outputs in the form of water conditions in Kuala Langsa Village. Fish sampling was carried out using the Purposive Sampling method. The composition of fish species caught at the three stations consisted of 12 species, namely: Mystus nemerus, Channa striata, Chanos chanos, Drepane punctate, Stolephorus sp, Gerres erythourus, Leiognathus splendens, Lutjanus johnii, Planiliza subviridis, Johnius belangerii, Epinephelus sp., Terapon jarbua. The total number of fish caught at station I was 36 fish, station II was 22 fish, and station III was 28 fish. Total relative abundance at stations I, II, and III in Kuala Langsa Kota waters obtained the highest abundance of fish from the species Leiognathus splendens with a value of 31.40% while the lowest relative abundance was found in the species Epinephelus sp and Chanos with a value of 1.16%. The diversity index at stations I, II, III ranged from 1.73 to 2.19. The three stations had moderate diversity criteria, indicating that the biological condition and fish diversity were still stable. Uniformity values of stations I, II, III, range from 1.53-1.59 which indicates high uniformity. This is due to the high uniformity because the fish population is spread evenly at each station. Dominance values at stations I, II, III range from 0.14-0.24 indicating low dominance or no fish species dominating at each station. Keywords: Diversity; Dominance; Kuala Langsa; Relative abundance; Uniformity
Occurrences of the Angular Roughshark (Oxynotus centrina Linnaeus, 1758) in the Gulf of Finike and Shortfin Mako (Isurus oxyrinchus Rafinesque, 1810) in the Western Mediterranean, Türkiye Yıldız, Alper; Gokoglu, Mehmet; Biçer, Erkan; Yılmaz, Mesut
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 12: No. 1 (April, 2025)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v1i1.18632

Abstract

The Mediterranean Sea experiences some of the highest levels of fishing pressure globally. Cartilaginous fish are the most impacted by this pressure, with their populations declining swiftly in the Mediterranean and across the world. There is limited data about sharks in the Mediterranean region. This research documented three Shortfin Mako sharks (Isurus oxyrinchus Rafinesque, 1810), in the Gulf of Antalya and the Angular Roughshark (Oxynotus centrina Linnaeus, 1758) was recorded for the first time in the Bay of Finike. These species are classified as Critically Endangered (CR) on the IUCN Red List, in the Mediterranean Sea.Keywords: Fishing; Gulf; Shark; Turkey
Optimizing the addition of Skeletonema Costatum flour in feed for the growth and survival of koi fish (Cyprinus carpio) Hakim, Riza Rahman; Hidayat, Reyhan Rafisyah; Hermawan, David; Prasetyo, Dony
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 12: No. 1 (April, 2025)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v1i1.18545

Abstract

Selecting the appropriate feed is one of the most important factors in cultivating koi fish. High-quality feed is feed that contains a comprehensive range of essential nutrients, including protein, fat, carbs, vitamins, and minerals. Skeletonema costatum, which has a protein content of approximately 31%, is a good dietary option for promoting the growth of koi fish. This research aims to determine the effect of providing skeletonema flour on the growth and survival of Koi fish. The method used is experimental. The research design used a completely randomized design (CRD) with five treatments and three replications. The treatment used in this research was the addition of skeletonema flour to the feed at different doses, namely P0 (0%), P1 (1%), P2 (3%), P3 (5%), and P4 (7%). The results of the research showed that the addition of Skeletonema costatum flour to artificial feed gave effective results in increasing absolute weight growth but had no effect on absolute length growth, FCR, or survival of koi fish. The best treatment was treatment P4, namely the addition of 7% skeletonema flour, which resulted in an absolute weight growth of 2.3 grams and the lowest FCR.Keywords: Growth; Koi Fish; Skeletonema costatum; Survival Rate
Analysis of land suitability for mangrove rehabilitation in Bulakbaru Coastal Area, Kedung, Jepara Setiyowati, Desti; Mustofa, Arif; Kursistiyanto, Nurcahyo
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 12: No. 1 (April, 2025)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v1i1.18989

Abstract

Mangrove forests are vital ecosystems that maintain coastal environmental balance by preventing erosion, absorbing waste, providing habitat for aquatic life, and protecting coastlines from natural disasters. However, mangrove areas have been damaged due to land conversion and development. Rehabilitation is necessary, including in Bulakbaru Village, Kedung District, Jepara Regency, through land suitability analysis. This study aims to analyze the suitability of the Bulakbaru coastal area by considering biophysical factors such as tidal patterns, current speed, wave height, sediment particle size, salinity, temperature, and coastal slope. Surveys were conducted at three observation stations, and the data were analyzed using a ranking method based on oceanographic parameters. The results show that Station I has the highest suitability score (92.11%), supported by slow currents, low waves, and fine sediment particles, ideal for mangrove species such as Rhizophora spp. and Avicennia spp. Station III is considered suitable (79.15%), although sediment particles are sandy and stronger currents slightly reduce its suitability. Station II is moderately suitable (77.58%) due to gravelly substrate and strong currents, which limit mangrove growth. Overall, most land in Bulakbaru is deemed suitable for mangrove rehabilitation, particularly Station I, which is the most optimal. Oceanographic factors significantly influence land suitability, with muddy land and slow currents providing ideal conditions for mangrove growth.Keywords: Land Suitability; Mangroves; Rehabilitation
Exogenous feeding in larvae of bilih fish (Mystacoleucus padangensis Blkr) Kusuma, Hendra; Syandri, Hafrijal; Eriza, Mas
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 12: No. 1 (April, 2025)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v1i1.19115

Abstract

The bilih fish (Mystacoleucus padangensis Blkr) is an endemic species in Lake Singkarak, holding significant economic value. However, its population has drastically declined over the past few decades and is currently classified as 'vulnerable'. One of the crucial factors in the successful cultivation of bilih fish is the provision of appropriate feed during the early larval stages, particularly after the depletion of endogenous yolk reserves. This study aims to examine the exogenous feeding phase in bilih fish larvae after the endogenous food supply has been exhausted, which marks the stage when the larvae must begin to rely on external feed for survival and growth. The study employed a Completely Randomized Design of three treatments with four replications each. Treatment A involved feeding Chlorella sp. (days 3-10), followed by Artemia (days 10-20); Treatment B involved Chlorella sp. (days 3-10), followed by artificial feed (days 10-15) and Artemia (days 15-20); and Treatment C involved artificial feed (days 3-10), followed by Artemia (days 10-20). The larvae were reared in tarpaulin tanks with a water volume of 125 L and a stocking density of 2,000±85 individuals, and they were fed to satiation twice a day (morning and evening) for 20 days. Data were analyzed using One-way ANOVA with the IBM SPPS Statistics 25 program. The results showed that the provision of different exogenous feed compositions had no significant effect (P˃0.05) on absolute length growth and survival of bilih fish larvae (Mystacoleucus padangensis Blkr). Treatment B produced the best survival (31.75 ± 1.70%) and absolute length growth (3.67 ± 0.21 mm). The results of the water quality parameters show an average temperature of 28±1.2oC, pH 28±1.2, dissolved oxygen 5.6±0.78 mg/l.Keywords: Absolute Length Growth; Bilih Fish Larva; Diet Type; Feed Composition; Survival Rate
Feeding regime effect of life feed on the growth and survival of angelfish postlarvae (Pterophyllum scalare) Fitri, Megana; Nuraini, Nuraini; Heltonika, Benny
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 12: No. 1 (April, 2025)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v1i1.15862

Abstract

Angelfish is economically of ornamental fish, but slow growth on post larvae phase is problem for this fish. Once solution for this problem is to find optimal feed to support and accelerate the growth of angelfish larvae by providing appropriate feed for life feed types. The research was conducted from March to May 2023 at the Fish Breeding and Genetics Laboratory, Faculty of Fisheries and Marine Sciences, University of Riau. The objective of this study was to investigate the influence of feeding regime of life feed to angelfish larvae (Pterophyllum scalare). The research using a Completely Randomized Design (CRD) with one factor, consisting of 5 treatment levels and 3 replications. The treatments used P1 (Artemia sp for 2 weeks + Tubifex for 4 weeks), P2 (Mosquito larvae for 2 weeks + Tubifex for 4 weeks), P3 (Infusoria for 2 weeks + Tubifex for 4 weeks), P4 (Tubifex for 6 weeks), and P5 (Artemia sp for 6 weeks). The larvae were reared for 42 days with a stocking density of 3 fishes/L. The results showed that substituting natural feed with different types had a significant effect, particularly in treatment P2 which resulted in an absolute weight growth of 2.46 g, absolute length growth of 4.01 cm, specific growth rate of 14.53%, and larval survival rate of 88.15%. The water quality during the study was within the normal. The temperature ranged from 27.6 to 28.5 ºC, pH ranged from 6.0 to 8.0, and dissolved oxygen (DO) ranged from 4.5 to 5.3 mg/L.Keywords: Artemia sp; Decorative fish, Infusoria; Silk worm
Mapping mangrove forest density distribution and deforestation with machine learning on Google Earth Engine in West Nusa Tenggara Province Husnayaen, Husnayaen; Anhar, Alfian; Bela, Riyani; Arini, Dwi Puspa
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 12: No. 1 (April, 2025)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v1i1.18783

Abstract

Mangrove forests play a very important role in reducing greenhouse gas emissions as part of efforts to mitigate climate change in Indonesia. The existence of mangrove forests is sensitive to extreme environmental changes, and high levels of utilization increase the risk of deforestation. The purpose of this study is to provide information regarding distribution, density, and deforestation of mangrove forests in 2023 in West Nusa Tenggara Province. Data processing was carried out based on cloud computing using Google Earth Engine with a random forest algorithm and supervised classification, utilizing Landsat satellite imagery data from 2000 and 2023. The classification of mangrove forest density was performed by interpreting the satellite imagery from 2023 using the NDVI (Normalized Difference Vegetation Index) method. Field surveys were conducted at 40 sample points to observe the presence and condition of mangrove forests that experienced deforestation in 2023. The results of image data processing were validated using field data and high-resolution images from Google Earth, with an accuracy assessment method presented in the error matrix. The results showed that mangrove forests have a sparse density of 4968.10 ha, a medium density of 2516 ha, and a dense density of 4928 ha. The total deforestation area in West Nusa Tenggara Province is 610 ha, with Dompu Regency having the largest percentage of deforestation, accounting for 68% of the total mangrove deforestation in West Nusa Tenggara Pronvince. The destruction of mangrove forests is mostly caused by the fisheries sector, namely the conversion of mangrove forests into pond sites.Keywords: Deforestation; Google Earth Engine; Mangrove Forest; NDVI; West Nusa Tenggara
Evaluation of growth and survival of vannamei shrimp (Litopenaeus vannamei) intensive system with probiotic supplementation in feed Zubaidah, Anis; Lasmi, Huda; Hariyadi, Hariyadi
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 12: No. 1 (April, 2025)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v1i1.18602

Abstract

The cultivation of vannamei shrimp (Litopenaeus vannamei) has become one of the most economically important sectors of aquaculture worldwide. However, challenges such as disease, declining water quality, and dependence on antibiotics have driven the search for more sustainable alternative solutions. The use of probiotics in feed has emerged as an innovative and environmentally friendly approach to improving shrimp health and production efficiency. Probiotics function by enhancing microbial balance in the digestive tract, strengthening the immune system, and improving nutrient absorption, which ultimately positively impacts the growth and survival of shrimp. This study highlights the importance of probiotic supplementation in shrimp feed cultivated under large-scale intensive systems. The method used in this study was an experimental method with two treatments: without probiotics (P0) and with probiotics (P1). The observed parameters included shrimp biomass growth (MBW), daily growth (SGR), and survival rate (SR). The results showed that the average MBW values were 8.83g (P0) and 8.92g (P1). The daily growth rate was 0.27%/day (P0) and 0.29%/day (P1). The FCR value was 1.2 for P0 and 0.9 for P1. Furthermore, the survival rate (SR) was 60% for P0 and 71% for P1. This study concludes that the use of probiotics in shrimp farming positively impacts the growth and survival of vannamei shrimp.Keywords: Effective; Lactobacillus Sp; Mortalities
Effect of antibiotics on gut microbiome diversity in Clarias gariepinus from commercial hatcheries Durojaiye, Abiola; Sule, S.O; Oyetunji, O.T; Badewa, M.O
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 12: No. 1 (April, 2025)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v1i1.10232

Abstract

The study investigated the effects of antibiotics on gut microbiome diversity in fish (Clarias gariepinus). Total aerobic count (TAC), total coliform count (TCC) and total fungal count (TFC) of gut contents were determined. Results revealed that there were significant differences (p<0.05) observed in the total aerobic and total coliform counts across the hatcheries. Using the Shannon and Simpson indices to measure variability in bacterial diversity among the hatcheries, TAC in hatcheries using antibiotics had greater diversity compared to hatcheries not using antibiotics while TCC where hatcheries not using antibiotics had higher diversity than the ones using antibiotics. This indicates that hatcheries where antibiotics were not used had higher microbial densities than hatcheries where antibiotics were used.  However, it was observed that fungi were completely absent as indicated in the total fungal counts. In hatcheries using antibiotics, Shigella spp, Klebsiella spp and Salmonella spp were isolated while in hatcheries not using antibiotics, Shigella spp, Klebsiella spp and Enterobacter spp were isolated. Sorensons coefficient indicated a slight overlap or similarity with a value of 0.667 among the bacterial communities in samples from farms using antibiotics and ones not using antibiotics. All the bacteria isolated belong to the phylum Proteobacteria. The study revealed that antibiotics had a slight effect on the diversity of the fish gut microbiome indicating that antibiotics are moderately used in fish hatcheries in Ijebu-Ode Region of Ogun State.Keywords: Antibiotics; Diversity; Gut Microbiome
Relationship between microbiota in the goldfish gut and fish digestive physiology: A meta-analysis approach Choirunisa, Evifa Lutfiah Sya'bani; Zulfah, Kayla Fatimah; Fathiyya, Adinda Zhafarah; Rusdi, Rusdi; Lisanti, Elsa
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 12: No. 1 (April, 2025)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v1i1.16753

Abstract

The fish intestinal microbiota is associated with the fish's health status. This study aims to determine the relationship of the fish intestinal microbiota with the fish's physiological digestion. Methods used in this study are meta-analysis by collecting sources of relevant articles or journals with the research topic. The data is secondary data obtained from the process of analyzing articles or journals that have been obtained. The results showed that the type of microbiota is not different in each species of fish but the number of microbiota is different in each species of fish. The absence of differences is because this study only takes data from the dominant types of microbiota in each fish species, while differences in the number of microbiota are due to differences in environmental conditions, eating habits, fish health, fish species, and fish age. Some types of microbiota that become dominant and will be commonly found in various types of fish are Actinobacteria, Bacteroidetes, Firmicutes, Fusobacteria, and Proteobacteria. The presence of each type of microbiota will have different impacts and functions for the host. Keywords: Turtle, Rainfall, Wind Speed, Wave Height.Keyword: Digestive Physiology; Goldfish; Intestine Microbiota

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