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Tomini Journal of Aquatic Science
Published by Universitas Negeri Gorontalo
ISSN : -     EISSN : 27223787     DOI : https://doi.org/10.37905/tjas
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Tomini Journal of Aquatic Science (Tomini J. Aquat. Sci.) is an open-access peer-reviewed journal that published by the Faculty of Fisheries and Marine Science, Gorontalo State University. This journal dedicated to the research in the field of aquatic sciences (freshwater, marine, and brackish). Topics of interest include but are not limited to; aquatic bioecology, aquatic biodiversity, aquatic toxicology, aquatic management, and aquaculture.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Perairan
Articles 5 Documents
 1 
Search results for , issue "VOLUME 3 ISSUE 1, MAY 2022" : 5 Documents clear
The Growth of Chlorella sp. Cultivated in Walne Media with Different Intensities of Light Arafik Lamadi; Mulis Mulis; Agatha Elda Kristanto
Tomini Journal of Aquatic Science VOLUME 3 ISSUE 1, MAY 2022
Publisher : Gorontalo State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (443.904 KB) | DOI: 10.37905/tjas.v3i1.9999

Abstract

This research was composed to identify the effect of different light intensities on the growth of Chlorella sp, as well as the optimal amount of light to improve said growth. This experimental research employed completely randomized design, with 5 treatments of different light intensities; A (3400 lux), B (4400 lux), C (5400 lux), D (6400 lux) and E (7400 lux) with 4 replications for each treatment. Based on the ANOVA, the findings revealed the different effects of the treatments (p
Species inventory and density of gastropod in mangrove ecosystem at Tomini Bay Gorontalo Rivani Usman; Munirah Tuli
Tomini Journal of Aquatic Science VOLUME 3 ISSUE 1, MAY 2022
Publisher : Gorontalo State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/tjas.v3i1.17005

Abstract

This study aimed to identify the inventory of gastropod species and Density at The Mangrove Ecosystem in Pentadu Timur Village, Tomini Bay, Gorontalo, from March to April 2022. Two observation stations were determined from purposive sampling, which was carried out in five transect lines and four quadrants measuring 1x1, while the gastropod samples were taken and then placed in a plastic bag for identification and documentation. In contrast, the density analysis was carried out descriptively by differentiating each species of Gastropod. The results showed that eight families and 11 species of gastropods were identified, namely; Monodonta labio, Cassidula aurisfelis, Littoraria sulcata, Nerita planospira, Chicoreus capucinus, Cerithium kobelti, Nassarius polygonatus, Cerithidea obtusa, Telescopium telescopium, and Tereblaria palustris. In both stations within the tourist area, two types of gastropod species experienced the highest and lowest densities for two months, namely Nassarius polygonatus, found at 20.4 ind/m² in march and 18.4 ind/m² in April, whereas the protected forest areas that species Telescopium found 14.2 ind/m² in march and 12.40 ind/m² in April
Characteristics of Avicennia lanata (Ridley) Species for mangrove restoration on the coast of North Gorontalo Faizal Kasim
Tomini Journal of Aquatic Science VOLUME 3 ISSUE 1, MAY 2022
Publisher : Gorontalo State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/tjas.v3i1.15541

Abstract

Research on the rare mangrove Avicennia lanata (Ridley) is based on the habitat affinity of this species on the coast of North Gorontalo observed during 2017-2019. The current search was carried out in geographically isolated areas (land and islands) using a combination of tracking and Point Centered Quarter (PCQ) techniques to observe the substrate condition and elevation of the mangrove patch habitat, as well as to observe the morpho-anatomical character of the stand. The results showed that the habitat affinity of A. lanata species in North Gorontalo covers a wide range of substrate types, including mud, sandy mud, sand, muddy sand, and sandy and muddy soil on land with an elevation of 5.11–6.57 MDPL. The morpho-anatomical character as a distinguishing feature of A. lanata species from other Avicennia species found in leaves, stems, and fruit, could only be observed clearly in individual stands and trees. This study recommends restoration/monitoring of mangrove species A. lanata (Ridley) with a mixed-species restoration approach and community-based co-planting in a long-term mangrove restoration program in the coastal area of North Gorontalo.
Species composition and abundance of fishes in seagrass meadow ecosystem in tontayuo village and lamu village, batudaa pantai subdistrict, gorontalo regency, tomini bay area. Novia Tumewu; Munirah Tuli; La Nane
Tomini Journal of Aquatic Science VOLUME 3 ISSUE 1, MAY 2022
Publisher : Gorontalo State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/tjas.v3i1.16999

Abstract

The objective of this research was to determine the species composition and abundance of fishes in the waters of Tontayuo Village and Lamu Village, Batudaa Pantai Subdistrict, Gorontalo Regency. This research was conducted from April to May 2022. The data collection of this research was carried out using a net with a length of 50 m, a widh of 2 m, and a mesh size of 1.5 cm drawn in the seagrass meadow, and it was replicated three times at each station, namely station I (Tontayuo Village) and station 2 (Lamu Village). The findings denoted that the highest species composition was found at station I with 34 species, while at station 2, there ware only 11 species. At the same time, the highest abundance value found at station 1 was Piotosus lineatus species, and the highest abudance at station II was Caranx melampyus species. Overall, the finding signified that the composition and abundance of fishes at station I and station II ware highly different due to the different water condition and fishing times.
Exploration of the potential of vitamin premix with different doses to increase growth and survival of saline tilapia (Oreochromis niloticus) on laboratory scale environment Hasim Hasim; Salma Suna; Rully Tuiyo
Tomini Journal of Aquatic Science VOLUME 3 ISSUE 1, MAY 2022
Publisher : Gorontalo State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/tjas.v3i1.16380

Abstract

Tilapia is an important commodity for Indonesian fisheries. Therefore, tilapia cultivation continues to grow. The goal is to meet market needs and increase production more optimally. One of them is through feed innovation to increase growth and maximum survival. This study aimed to explore the effect of giving vitamin premix with different doses on the growth and survival of saline tilapia (Oreochromis niloticus) fry. The method used is an experiment with a completely randomized design (CRD) which consists of 4 treatments with three replications. Treatment A (without added vitamins), B (vitamin premix 3%), C (vitamin premix 4%), D (vitamin premix 5%). The results showed that treatment D had a significant effect on increasing the weight and length of saline tilapia with an average weight value of 3.21 and an average length value of 2.67, followed by treatment C weight with a value of 2.50 and a length of 2, 05, treatment B was heavy with a value of 2.49, and length of 1.86 and treatment A was heavy with a value of 1.60, and length of 1.23. The highest survival was in treatment D with a value of 100%, treatment C with a value of 93.3%, treatment B with 86.7%, and treatment A with 80.0%. Vitamin premix dose D gave the best effect, so it has the potential to be applied in saline tilapia cultivation.

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