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HUBUNGAN PANJANG-PANJANG, POLA PERTUMBUHAN DAN KONDISI IKAN NYALIAN, Barbodes binotatus (VALENCIENNES, 1842) DI EMPAT DANAU DI PULAU BALI I Nyoman Yoga Parawangsa; Prawira Atmaja Tampubolon; Nyoman Dati Pertami
BAWAL Widya Riset Perikanan Tangkap Vol 15, No 1 (2023): (APRIL) 2023
Publisher : Politeknik Kelautan dan Perikanan Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/bawal.15.1.2023.14-24

The relationship between length type, length-weight relationship and condition factors is an initial approach to fisheries management. Research related to that issue on spotted barb (Barbodes binotatus) in four lake ecosystems in Bali has never been published. This study aims to reveals information related to the relationship of length character, growth patterns and conditions of B. binotatus in four lake ecosystems in Bali. Fish sampling was carried out from August 2017 to July 2018 at Tamblingan Lake, Buyan Lake, Beratan Lake and Batur Lake which were carried out alternately. The results of this study revealed that the total length (TL), fork length (FL) and standard length (SL), each type of measurement can be used to estimate the weight of B. binotatus, but standard length was the most suitable type of measurement in estimating weights. This fish species has a positive allometric growth pattern (b>3) with an estimated condition that is in good condition.

Keanekaragaman Iktiofauna Ekosistem Estuari Taman Hutan Raya Ngurah Rai, Bali Gabrielle Aisya; Nyoman Dati Pertami; I Nyoman Giri Putra
Journal of Marine Research and Technology Vol 6 No 2 (2023): AGUSTUS 2023
Publisher : Department of Marine Sciences, Faculty of Marine and Fisheries, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2023.v06.i02.p01

The diversity of ichthyofauna is an important aspect that can be used to presume the aquatic environmental conditions. Therefore, this study aims to determine the diversity of ichthyofauna in Taman Hutan Raya (TAHURA) Ngurah Rai, Bali during the eastern season and transitional II season. The sample was collected from July 2022 â€“ October 2022 using an experimental gill net. During the sampling period of this study, 413 fishes were caught, representing 18 different species from 17 genera, 14 families, and 12 orders. Based on the results of the analysis, the highest diversity value was found in the waters of Jimbaran, then the waters of Kampung Kepiting, while Serangan waters has the lowest diversity value (Hâ€™<1). The lowest uniformity index was found in the waters of Serangan because it is dominated by only one fish species, namely Ambassis macracanthus (Seriding Fish), while in the waters of Kampung Kepiting and Jimbaran, the uniformity is quite even. The highest dominance index was found in the waters of Serangan, while other water areas has no dominating species. The species composition found at all stations varied considerably, but the results of the IUCN status showed that most of the fishes were still in the category of data deficient and not evaluated. The highest abundance was found in the waters of Serangan. The water quality parameters of TAHURA Ngurah Rai showed that not all aspects are in accordance with quality standards for marine life.

Hubungan Panjang-Bobot dan Faktor Kondisi Ikan Estuarine Glass Perch (Ambassis macracanthus Bleeker, 1849) di Perairan Taman Hutan Raya (Tahura) Ngurah Rai, Teluk Benoa, pada Musim Timur Franceska Kendra Rossa S; Nyoman Dati Pertami; I Nyoman Giri Putra
Journal of Marine Research and Technology Vol 6 No 2 (2023): AGUSTUS 2023
Publisher : Department of Marine Sciences, Faculty of Marine and Fisheries, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2023.v06.i02.p10

The growth aspect is important in determining fish well-being in an area. However, research on the growth aspect of Ambassis macracanthus Bleeker, 1849, in Ngurah Rai Forest Park has never been conducted This study aims to determine the length-weight relationship and condition factor of A. macracanthus as well as to evaluate the water condition in Ngurah Rai Forest Park, Benoa Bay during the east season. The sample was collected applying descriptive and quantitative methods, whilst the purposive sampling method was used to take the samples from three stations using Bubu and experimental gill net. During the sampling collection process, 304 fish individuals were caught by the experimental gill net at station 1 (Serangan waters). Based on the analysis between the length and weight relationship of A. macracanthus, the equation of W=0,024L2.38, where from this equation, the value of b = 2.38 is obtained. Through the T-test, the value of b < 3 showed a negative allometric growth pattern; namely, the growth in length is more dominant than the increase in weight. The average relative condition factor increased monthly, with the highest value of 1.37 in August. However, the value of the relative condition factor indicates that the fish in Tahura waters are thin (Kn < 2). In general, the temperature and dissolved oxygen of Ngurah Rai Forest Park waters are not following quality standards.

LENGTH-WEIGHT RELATIONSHIP, GROWTH PATTERN AND CONDITION OF MIDAS CICHLID FISH (AMPHILOPHUS CITRINELLUS) IN LAKE BATUR, BANGLI REGENCY, BALI Putu Tegar Wiguna Putra; Ayu Putu Wiweka Krisna Dewi; Nyoman Dati Pertami
INTERNATIONAL JOURNAL OF ECONOMIC LITERATURE Vol. 2 No. 12 (2024): December
Publisher : Adisam Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar

Midas cichlid fish (Amphilophus citrinellus) is often referred to as a pest fish because it is a fish that can only prey but does not produce sufficient economic value, because it reproduces very quickly. This research aims to determine the length-weight relationship, growth patterns and condition of Midas cichlid fish as well as the water conditions of Lake Batur. The research was carried out using quantitative descriptive methods, with a purposive sampling method for sampling. The sampling locations were at three stations. The fishing gear used is gill nets. The total number of fish caught during data collection was 287 individuals. Based on the results of the analysis of the length-weight relationship of midas cichlid fish (Amphilophus citrinellus) in Lake Batur, the equation W=0.0215L2.92 was obtained, where from this equation the value b = 2.92 was obtained. The t test was carried out and it was found that the b value was <3 so it could be concluded that the growth pattern was negative allometric. The relative condition (Kn) of male and female Midas cichlid fish in Lake Batur is in good condition (1.01), with a less flattened body shape (fusiform). The condition of the water parameters in Lake Batur during the research was classified as good and stable for the survival of aquatic biota, one of which was the Midas cichlid fish with a pH value of 7.1-7.5; DO 5.3-6.5 mg/L; Temperature 27.8-29.6°C and brightness 1.5-1.9 m.

Eating Habits and Dietary Strategies of the Glass Perchlet Fish (Ambassis macracanthus) In Benoa Bay Waters, Bali in Two Different Seasons Julian Ichsana Argeswara; Nyoman Dati Pertami; Gde Raka Angga Kartika
Advances in Tropical Biodiversity and Environmental Sciences Vol. 8 No. 2 (2024): June 2024: Pages 58-118
Publisher : Institute for Research and Community Services Udayana University (LP2M Universitas Udayana)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/ATBES.2024.v08.i02.p06

The Benoa Bay area and its surroundings are a center of biodiversity at the ecosystem level in the southern coastal region of Bali. This area exhibits diverse ecosystems, including mangrove ecosystems, coral reefs, seagrass beds, and tidal flats. This research aims to analyze and describe the feeding ecology of Ambassis macracanthus in the waters of Benoa Bay. The study was conducted in May, at the end of the transitional season, and in July and August, during the eastern monsoon season in Benoa Bay Waters. Modified gill nets with mesh sizes of 0.5, 1.0, 1.5, 2.0, 2.5, and 3.0 cm were used for capturing the fish. The fish were caught at three stations, which represented the characteristic conditions of the Benoa Bay Waters. Out of the 396 individuals caught during the study, only 100 were selected for examination. The average relative fullness gut index (RGI) of Ambassis macracanthus ranged from 0.39 to 0.67. The total Important Relative Index (IRI) value for the food of Ambassis macracanthus in Benoa Bay Waters was 951.27. Ambassis macracanthus in Benoa Bay Waters is an omnivorous species with a tendency towards herbivory, and 21 different organisms were found in its diet, including three classes of phytoplankton and three classes of zooplankton. The feeding strategy developed by Ambassis macracanthus in Benoa Bay Waters is generalist. This information about the fish can be used as a fundamental basis for managing fish in the waters of Benoa Bay.

Study of Reproductive Aspects of Fish Cyprinidae Family and Poeciliidae Family in Lake Batur Waters Area, Bali Winni Anugrah Hani; Nyoman Dati Pertami; I Wayan Darya Kartika
Advances in Tropical Biodiversity and Environmental Sciences Vol. 9 No. 3 (2025): October 2025
Publisher : Institute for Research and Community Services Udayana University (LP2M Universitas Udayana)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/ATBES.2025.v09.i03.p10

This study aims to determine the reproductive characteristics of the Cyprinidae and Poeciliidae families in Lake Batur, including gonad maturity stage, gonadosomatic index, and sex ratio. Sampling was carried out from November to December 2021. This study uses descriptive and quantitative methods, with purposive sampling at three station points. The fishing gear used is a gill net with sizes of 0.5, 1.0, 1.5, 2.0, 2.5, and 3.0 inches. Determination of the gonad maturity stage of the gonads is determined morphologically, which includes observations on the color, shape, and size of the gonads. The gonad maturity stage III and IV was analyzed with the gonadosomatic index and sex ratio. The fish samples total 147 individuals: 54 from the Cyprinidae family and 93 from the Poeciliidae family. Cyprinidae family fish samples are Barbodes binotatus and Barbonimus gonionotus. Poeciliidae family fish samples are Xiphophorus hellerii and Poecilia reticulata. gonad maturity stage of the cyprinidae family in Barbodes binotatus obtained I -IV and Barbonimus gonionotus fish obtained all stages I-V, while the poeciliidae family Xiphoporus hellerii at all stages IV and Poecilia reticulata only found I-IV, the average of gonadosomatic index of female cyprinidae and poeciliidae is higher than males, and spawning time occurs in November and December (rainy season). The sex ratio of the Cyprinidae family in Barbodes binotatus is unbalanced, while in the Poeciliidae family, the sex ratio of Xiphophorus hellerii is balanced.

Growth Patterns, Length-Weight Relationships, and Condition Factors of Bullet Tuna (Auxis rochei) from PPI Bias Lantang, Seraya Timur, Bali Sinar Jayadi; I Wayan Restu Nuarsa; Nyoman Dati Pertami
Advances in Tropical Biodiversity and Environmental Sciences Vol. 9 No. 2 (2025): June 2025
Publisher : Institute for Research and Community Services Udayana University (LP2M Universitas Udayana)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/ATBES.2025.v09.i02.p07

The growth pattern analysis using the length-weight relationship and condition factor of the bullet tuna (Auxis rochei) landed at PPI Bias Lantang, Seraya Timur, Bali, has not yet been determined. This study was conducted to determine the growth pattern using the length-weight relationship and the condition factor of bullet tuna. Fish samples were collected from March to May 2024, three times over three months, with intervals of three weeks. The methods used during the research were descriptive, quantitative, and simple random sampling. The bullet tuna fishing season starts in March and lasts until May. The fishing was conducted around the waters of the Bali-Lombok Strait. A total of 300 bullet tuna samples were obtained during the study. The length-weight relationship analysis revealed a positive allometric growth pattern for bullet tuna at PPI Bias Lantang, with a b value of 3.0308. The length-weight relationship shows a strong coefficient of determination with R² = 0.7468. The graph and equation illustrate the length-weight relationship for bullet tuna (Auxis rochei). The condition factor values of the bullet tuna ranged from 1.0048 to 1.0062, indicating that the body shape is relatively less slender.

Profil Pencemaran Mikroplastik Pada Sedimen Ekosistem Mangrove di Pulau Serangan, Bali Made Bayu Khrisna Pramana; Nyoman Dati Pertami; Ni Luh Gede Rai Ayu Saraswati
Metamorfosa: Journal of Biological Sciences Vol. 12 No. 1 (2025)
Publisher : Program Magister Ilmu Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/metamorfosa.2025.v12.i01.p1

Microplastics are defined as small particles plastic with less than 5 mm in size. These small plastic particles were polluted all environments compartments, including mangrove ecosystem. This study aims to investigate microplastics pollution in mangrove sediment in Serangan waters, Bali. Moreover, sediment sample were collected in different sediment depth (0-10 cm, 10-20 cm and 20-30 cm) to understand the vertical abundance and morphology of microplastics in mangrove sediment. Sampling points were also distributed across mangrove ecosystem of Serangan Island with different characteristics, including near road and landfill station (St 1), residential area and small bussineses (St 2 and 3), and near bay area with less anthropogenic influence (St 4). A total of 182 suspected microplastic particles were identified from all sediment sample. The average of microplastics abundance vertically was ranging from 0.025±0.015 to 0.026±0.014 particle/g, while the average abundance horizontally was from 0.021±0.010 to 0.036±0.015 particle/g. Fragment was the most common microplastics types identified (76.37%), followed by fiber (15.38%) and film (8.24%). Our result highlight that microplastics has polluted the sediment layers of mangrove ecosystem in Serangan oWaters. The source of suspected microplastics particle in the sampling area was suggested from both land (through river pathway) and ocean (due to oceanographic factors, such as tides, wind and current). A further study on determining the polymer of suspected microplastics particle is needed. This is important to confirm the validity of visual identification in this study. Keyword: Microplastics, Mangrove ecosystem, Mangrove sediment, Serangan Island

Profil Pencemaran Mikroplastik Pada Sedimen Ekosistem Mangrove di Pulau Serangan, Bali Made Bayu Khrisna Pramana; Nyoman Dati Pertami; Ni Luh Gede Rai Ayu Saraswati
Metamorfosa: Journal of Biological Sciences Vol. 12 No. 1 (2025)
Publisher : Program Magister Ilmu Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/metamorfosa.2025.v12.i01.p1

Microplastics are defined as small particles plastic with less than 5 mm in size. These small plastic particles were polluted all environments compartments, including mangrove ecosystem. This study aims to investigate microplastics pollution in mangrove sediment in Serangan waters, Bali. Moreover, sediment sample were collected in different sediment depth (0-10 cm, 10-20 cm and 20-30 cm) to understand the vertical abundance and morphology of microplastics in mangrove sediment. Sampling points were also distributed across mangrove ecosystem of Serangan Island with different characteristics, including near road and landfill station (St 1), residential area and small bussineses (St 2 and 3), and near bay area with less anthropogenic influence (St 4). A total of 182 suspected microplastic particles were identified from all sediment sample. The average of microplastics abundance vertically was ranging from 0.025±0.015 to 0.026±0.014 particle/g, while the average abundance horizontally was from 0.021±0.010 to 0.036±0.015 particle/g. Fragment was the most common microplastics types identified (76.37%), followed by fiber (15.38%) and film (8.24%). Our result highlight that microplastics has polluted the sediment layers of mangrove ecosystem in Serangan oWaters. The source of suspected microplastics particle in the sampling area was suggested from both land (through river pathway) and ocean (due to oceanographic factors, such as tides, wind and current). A further study on determining the polymer of suspected microplastics particle is needed. This is important to confirm the validity of visual identification in this study. Keyword: Microplastics, Mangrove ecosystem, Mangrove sediment, Serangan Island

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