Jurnal Ilmiah Platax (edisi elektronik), Mar 20, 2023
Observations of temperature, salinity, and dissolved oxygen have been carried out in Amurang Bay ... more Observations of temperature, salinity, and dissolved oxygen have been carried out in Amurang Bay waters, North Sulawesi. This study aims to determine the temperature, salinity, and dissolved oxygen during the west and east seasonal monsoons. The statistical analysis results using the ttest showed that the temperature, salinity, and dissolved oxygen in the West monsoon with the east monsoon were significantly different. Temperature, salinity, and dissolved oxygen in the west monsoon are lower than in the east. Variations in temperature, salinity, and dissolved oxygen are influenced by atmospheric conditions, weather, rainfall, and current patterns. Implicitly, temperature and salinity can affect the solubility of oxygen in the East monsoon. The value of AOU (Apparent Oxygen Utilization) in the west monsoon is less than 0.00 mg/l (negative), which indicates that oxygen is very much needed for the process of respiration and decomposition of organic substances during the west monsoon.
Jurnal ilmu kelautan kepulauan/Jurnal Ilmu Kelautan Kepulauan, Jun 10, 2022
Padang lamun merupakan ekosistem perairan laut yang memiliki produktivitas primer tinggi. Secara ... more Padang lamun merupakan ekosistem perairan laut yang memiliki produktivitas primer tinggi. Secara ekologis padang lamun dimanfaatkan sebagai tempat mencari makan, berpijah, pembesaran maupun tempat berlindung bagi berbagai biota salah satunya ikan. Tujuan dari penelitian ini adalah untuk mengetahui komposisi jenis dan struktur komunitas ikan di ekosistem padang lamun perairan pantai Tandurusa pada bulan Januari hingga Maret 2020. Metode yang digunakan adalah observasi langsung dilapangan. Komposisi jenis ikan hasil tangkapan sebanyak 761 individu mewakili 61 spesies dan berasal dari 26 famili yang didominasi oleh jenis Apogon multilineatus, Pterapogon kauderni dan Plotosus lineatus. Secara keseluruhan nilai struktur komunitas didapatkan hasil nilai indeks keanekaragaman (H) sebesar 2,58; indeks keseragaman (E) sebesar 0,73 dan indeks dominansi (C) sebesar 0,14. Nilai hasil pengukuran parameter kualitas perairan di pantai Tandurusa Bitung masih dalam kisaran optimal yang dibutuhkan bagi kehidupan biota laut.
Ikan Banggai Cardinal (Pterapogon kauderni) merupakan salah satu jenis ikan hias yang hidup pada ... more Ikan Banggai Cardinal (Pterapogon kauderni) merupakan salah satu jenis ikan hias yang hidup pada habitat perairan laut dangkal dan penyebarannya sangat terbatas. Pengamatan sebaran ikan Pterapogon kauderni di perairan Selat Lembeh telah dilakukan pada bulan September 2022. Penelitian ini bertujuan untuk mengetahui sebaran populasi ikan Pterapogon kauderni dan lingkungan habitatnya. Pemetaan habitat dasar perairan laut dangkal menggunakan metode algoritma "depth invariant index" (Lyzenga, 1981). Pengambilan data ikan menggunakan metode underwater visual census (UVC) dan pengukuran kualitas air (suhu, salitas, pH dan oksigen terlarut) secara in situ. Hasilnya menunjukkan bahwa ikan Pterapogon kauderni umumnya ditemukan pada area lamun dan karang dengan mikrohabitatnya bulu babi, anemon dan sponge. Sebaran populasi ikan Pterapogon kauderni tertinggi mencapai > 0.75 ind/m² terdapat pada stasiun 1, stasiun 3 dan stasiun 8, sedangkan populasi ikan terendah <0.25 ind/m² yaitu stasiun 7, stasiun 6, stasiun 10 dan stasiun 9. Kelimpahan populasi ikan Banggai Cardinal di perairan Selat Lembeh mencapai 122.752 ekor dengan luasan habitat lamun dan karang 26.21 ha.
The observation of Dissolved Oxygen's (DO) seasonal variations in Lembeh Strait waters were carri... more The observation of Dissolved Oxygen's (DO) seasonal variations in Lembeh Strait waters were carried out in March 2016 to February 2017. DO value was measured using a multiparameter water quality sonde (EXO2, YSI inc.). The purpose of this study was to determine the seasonal effect on dissolved oxygen in Lembeh Strait waters. The results of the statistical analysis using ANOVA and Tuckey's test showed that the 1st transitional season had the most influence on dissolved oxygen at 5% confidence level. All of the values of Apparent Oxygen Utilization (AOU) in Transitional Season-I, Eastern monsoon and 2nd Transitional Season were all positive, while in Western monsoon, the negative and positive AOU values were balanced between (-0.11)-0.39 mg/l. A positive AOU value indicates the amount of oxygen available. The DO concentration in Lembeh Strait waters are considered normal and has not shown a negative impact on the aquatic environment.
Lamun merupakan tumbuhan yang hidup terbenam di dalam laut dan penting untuk ekosistem pesisir. F... more Lamun merupakan tumbuhan yang hidup terbenam di dalam laut dan penting untuk ekosistem pesisir. Fungsi penting padang lamun di antaranya yaitu sebagai spawning ground , feeding ground , dan tempat berlindung ikan.Wilayah perairan Ternate Maluku Utara dan sekitarnya merupakan salah satu lokasi penelitian COREMAP-CTI dan salah satu kajiannya mengenai ikan padang lamun. Tujuan penelitian ini untuk mengetahui struktur komunitas ikan di padang lamun perairan Ternate Maluku Utara. Pengumpulan data dilakukan dengan menggunakan metode Underwater Visual Census ( UVC) selama 12 hari pada sepuluh stasiun penelitian.Berdasarkan hasil pengamatan di padang lamun perairan Ternate, Maluku Utara ditemukan sebanyak 1105 individu terdiri dari 56 jenis dari 22 famili. Berdasarkan hasil analisis struktur komunitas, nilai indeks keanekaragaman 1.69, indeks keseragaman 0.68, dan indeks dominansi 0.32 yang menunjukkan keanekaragaman spesies rendah dengan stabilitas komunitas yang labil. Seagrass is a plant...
Research on seasonal variations of temperature, salinity and turbidity of the Lembeh Strait’s wat... more Research on seasonal variations of temperature, salinity and turbidity of the Lembeh Strait’s waters were carried out in March 2016 to February 2017. Observations of temperature, salinity and turbidity were conducted using the Sonde EXO-2 multi parameter tool. The purpose of this study was to determine the seasonal effect on temperature, salinity and turbidity Lembeh Strait’s water. The results of the statistical analysis using ANOVA and Tuckey's test showed that the season affected the salinity and temperature, whereas no significant effect were observed on turbidity. Variations in temperature, salinity and turbidity are affected by external factors such as weather, wind and seasonal current patterns occurred in these waters. The conditions of temperature, salinity and turbidity of sea water in Lembeh Strait are still adequate for marine life.Keywords: temperature, salinity, turbidity, oceanography, Lembeh Strait
Fish species composition and spatio-temporal variability of the community were studied in a tropi... more Fish species composition and spatio-temporal variability of the community were studied in a tropical seagrass meadow located in a lagoon in the eastern part of North Sulawesi. The diversity of fish community in the seagrass meadows was relatively high, with the Shannon-Wiener index ranging from 1.57 to 3.69. The family Apogonidae was the most dominant in abundance (8.27 ind./(100 m 2)) and biomass (28.49 g/(100 m 2)). At the species level, Apogon lateralis and Sphaeramia orbicularis were the most dominant species in abundance and biomass, respectively. For spatial distribution on species, the end, middle and mouth of the lagoon clustered together as a whole, which may be due to the substrate types found in those zones. The fish species, fish abundance and fish biomass were greater in the dry and wet seasons than in the transition season, which is explained by the strong monsoon, which provides a more suitable environment and food for the fish. The maximum length of 93.10% of the captured species was less than their length at maturity, indicating that seagrass meadows are nursery habitats for many fishes. Therefore, protection of the seagrass meadows is essential for fisheries and sustainable resource utilization.
Pterapogon kauderni merupakan salah satu spesies ikan hias laut endemik Indonesia yang memiliki n... more Pterapogon kauderni merupakan salah satu spesies ikan hias laut endemik Indonesia yang memiliki nilai komersial yang cukup tinggi pada perdagangan ikan hias internasional. Populasi ikan inidi alamtelah nyata mengalami penurunan akibat dari penangkapan berlebihan tampa memperhatikan aspek biologis maupun ekologis.Pengamatanterhadap ikan Banggai Cardinaldi perairan Teluk Ambon Dalamdilakukan untuk mengetahui jumlah populasi dan dugaan stok ikan.Hasilnya menunjukkan bawa populasi ikan tertinggi terdapat pada lokasi Poka,dengan nilaidensitas0,17-0,42 ekor/m²dandugaan populasi mencapai 25411 ekor. Populasiikan terendah terdapat di Waiheru dengan densitas0,05-0,06 ekor/m² serta dugaan populasi mencapai 2556 ekor.Kelimpahan populasi ikanhias ini berhubungan erat dengan kelimpahan bulu babi yang merupakan mikrohabitat utamanya pada daerah lamun dan terumbu karang. Kata kunci: Populasi, habitat, Pterapogon kauderni, Teluk Ambon Dalam.
Mangrove is one of the objects that can be identified by remote sensing technology using satellit... more Mangrove is one of the objects that can be identified by remote sensing technology using satellite imagery. Analysis of the distribution and density of mangrove vegetation using Landsat 8 imagery was carried out in Bolaang Mongondow Timur, North Sulawesi in September 2020. This study aims to map the distribution of mangroves and determine the correlation between NDVI values, canopy cover, and mangrove density. The data analysis used Landsat 8 images with ENVI 5.3 and ArcGIS 10.1 software. Maximum likelihood classification is used to separate mangrove and non-mangrove features. The calculation of mangrove vegetation density using the NDVI algorithm and single-channel classification using the density slice method to divide mangrove density based on the range of pixel values of the NDVI image. Next, to test the accuracy of the classification results using an error matrix (confusion matrix) and the NDVI vegetation index correlation test compared with canopy cover and density data. The c...
Oxygen in seawater comes from the air through diffusion and photosynthesis. This study aims to de... more Oxygen in seawater comes from the air through diffusion and photosynthesis. This study aims to determine the dissolved oxygen content, NAEC (Normal Atmospheric Equilibrium Concentration), and AOU (Apparent Oxygen Utilization) in East Bolaang Mongondow waters. The analysis showed that the dissolved oxygen content in the surface layer ranged from 6.01-7.05 mg/l; 5.91-6.98 mg/l (5 m depth); and 5.75-6.90 mg/l (near bottom depth). NAEC is closely related to water temperature and implicitly increases with depth. The highest NAEC value of 5.90 mg/l (t=28.0ºC) was found at the bottom depth, and the lowest NAEC of 5.63 mg/l (t=30.0ºC) was found at the surface layer. The dissolved oxygen saturation level of more than 100% and the average positive AOU value at 0.59-0.81 mg/l describe the amount of oxygen available in the surface layer.Keywords: Dissolved Oxygen; Normal Atmospheric Equilibrium Concentration (NAEC); Apparent Oxygen Utilization (AOU); East Bolaang Mongondow.AbstrakOksigen dalam ...
Ikan capungan Banggai atau yang lebih dikenal sebagai Banggai Cardinalfish / BCF (Pte... more Ikan capungan Banggai atau yang lebih dikenal sebagai Banggai Cardinalfish / BCF (Pterapogon kauderni) diketahui sebagai ikan endemik di perairan Kepulauan Banggai, Sulawesi Tengah, Indonesia. Beberapa waktu terakhir ini, ikan capungan Banggai ditemukan di beberapa wilayah lain di Indonesia sebagai dampak sampingan dari aktivitas perdagangan maupun kegiatan penelitian di bidang budidaya. Salah satu wilayah yang menjadi lokasi baru sebaran populasi ikan capungan Banggai di Indonesia adalah perairan Gilimanuk, Bali. Keberadaan ikan capungan Banggai di perairan ini pertama kali diketahui pada awal tahun 90an. Penelitian tentang status populasi ikan capungan Banggai di wilayah ini telah dilakukan pada bulan Maret 2018. Metode yang digunakan pada penelitian ini adalah modifikasi dari metode Belt Transect, yaitu pengamatan pada transek sepanjang 20 m dengan area bidang pengamatan 2,5 m di sebelah kanan dan kiri garis transek dengan enam ...
Observation of water quality in Raja Ampat Islands Natural Water Reserve (SAP Kepulauan Raja Ampa... more Observation of water quality in Raja Ampat Islands Natural Water Reserve (SAP Kepulauan Raja Ampat), was carried out in August-September 2019. This study aims to determine the water quality and the pollution’s status based on the water physical parameters. Measurement of all parameters was conducted in-situ using the EXO-2 device, while the water clarity was measured with a Secchi disk. The results of statistical analysis using the T-Test showed that the TDS content in the surface layer compared to the bottom was significantly different. Pollution index calculation results show that the waters of the Raja Ampat Islands are still in good condition (not polluted). Variations in temperature, salinity, brightness/clarity, turbidity, conductivity (DHL) and the dissolved solids values (TDS) are still adequate for the well-being of coral reefs and various marine biota inhabited the waters.Keywords: Water quality, physical characteristics, Raja Ampat ABSTRAKPengamatan kualitas air di SAP Ke...
Jurnal Ilmiah Platax (edisi elektronik), Mar 20, 2023
Observations of temperature, salinity, and dissolved oxygen have been carried out in Amurang Bay ... more Observations of temperature, salinity, and dissolved oxygen have been carried out in Amurang Bay waters, North Sulawesi. This study aims to determine the temperature, salinity, and dissolved oxygen during the west and east seasonal monsoons. The statistical analysis results using the ttest showed that the temperature, salinity, and dissolved oxygen in the West monsoon with the east monsoon were significantly different. Temperature, salinity, and dissolved oxygen in the west monsoon are lower than in the east. Variations in temperature, salinity, and dissolved oxygen are influenced by atmospheric conditions, weather, rainfall, and current patterns. Implicitly, temperature and salinity can affect the solubility of oxygen in the East monsoon. The value of AOU (Apparent Oxygen Utilization) in the west monsoon is less than 0.00 mg/l (negative), which indicates that oxygen is very much needed for the process of respiration and decomposition of organic substances during the west monsoon.
Jurnal ilmu kelautan kepulauan/Jurnal Ilmu Kelautan Kepulauan, Jun 10, 2022
Padang lamun merupakan ekosistem perairan laut yang memiliki produktivitas primer tinggi. Secara ... more Padang lamun merupakan ekosistem perairan laut yang memiliki produktivitas primer tinggi. Secara ekologis padang lamun dimanfaatkan sebagai tempat mencari makan, berpijah, pembesaran maupun tempat berlindung bagi berbagai biota salah satunya ikan. Tujuan dari penelitian ini adalah untuk mengetahui komposisi jenis dan struktur komunitas ikan di ekosistem padang lamun perairan pantai Tandurusa pada bulan Januari hingga Maret 2020. Metode yang digunakan adalah observasi langsung dilapangan. Komposisi jenis ikan hasil tangkapan sebanyak 761 individu mewakili 61 spesies dan berasal dari 26 famili yang didominasi oleh jenis Apogon multilineatus, Pterapogon kauderni dan Plotosus lineatus. Secara keseluruhan nilai struktur komunitas didapatkan hasil nilai indeks keanekaragaman (H) sebesar 2,58; indeks keseragaman (E) sebesar 0,73 dan indeks dominansi (C) sebesar 0,14. Nilai hasil pengukuran parameter kualitas perairan di pantai Tandurusa Bitung masih dalam kisaran optimal yang dibutuhkan bagi kehidupan biota laut.
Ikan Banggai Cardinal (Pterapogon kauderni) merupakan salah satu jenis ikan hias yang hidup pada ... more Ikan Banggai Cardinal (Pterapogon kauderni) merupakan salah satu jenis ikan hias yang hidup pada habitat perairan laut dangkal dan penyebarannya sangat terbatas. Pengamatan sebaran ikan Pterapogon kauderni di perairan Selat Lembeh telah dilakukan pada bulan September 2022. Penelitian ini bertujuan untuk mengetahui sebaran populasi ikan Pterapogon kauderni dan lingkungan habitatnya. Pemetaan habitat dasar perairan laut dangkal menggunakan metode algoritma "depth invariant index" (Lyzenga, 1981). Pengambilan data ikan menggunakan metode underwater visual census (UVC) dan pengukuran kualitas air (suhu, salitas, pH dan oksigen terlarut) secara in situ. Hasilnya menunjukkan bahwa ikan Pterapogon kauderni umumnya ditemukan pada area lamun dan karang dengan mikrohabitatnya bulu babi, anemon dan sponge. Sebaran populasi ikan Pterapogon kauderni tertinggi mencapai > 0.75 ind/m² terdapat pada stasiun 1, stasiun 3 dan stasiun 8, sedangkan populasi ikan terendah <0.25 ind/m² yaitu stasiun 7, stasiun 6, stasiun 10 dan stasiun 9. Kelimpahan populasi ikan Banggai Cardinal di perairan Selat Lembeh mencapai 122.752 ekor dengan luasan habitat lamun dan karang 26.21 ha.
The observation of Dissolved Oxygen's (DO) seasonal variations in Lembeh Strait waters were carri... more The observation of Dissolved Oxygen's (DO) seasonal variations in Lembeh Strait waters were carried out in March 2016 to February 2017. DO value was measured using a multiparameter water quality sonde (EXO2, YSI inc.). The purpose of this study was to determine the seasonal effect on dissolved oxygen in Lembeh Strait waters. The results of the statistical analysis using ANOVA and Tuckey's test showed that the 1st transitional season had the most influence on dissolved oxygen at 5% confidence level. All of the values of Apparent Oxygen Utilization (AOU) in Transitional Season-I, Eastern monsoon and 2nd Transitional Season were all positive, while in Western monsoon, the negative and positive AOU values were balanced between (-0.11)-0.39 mg/l. A positive AOU value indicates the amount of oxygen available. The DO concentration in Lembeh Strait waters are considered normal and has not shown a negative impact on the aquatic environment.
Lamun merupakan tumbuhan yang hidup terbenam di dalam laut dan penting untuk ekosistem pesisir. F... more Lamun merupakan tumbuhan yang hidup terbenam di dalam laut dan penting untuk ekosistem pesisir. Fungsi penting padang lamun di antaranya yaitu sebagai spawning ground , feeding ground , dan tempat berlindung ikan.Wilayah perairan Ternate Maluku Utara dan sekitarnya merupakan salah satu lokasi penelitian COREMAP-CTI dan salah satu kajiannya mengenai ikan padang lamun. Tujuan penelitian ini untuk mengetahui struktur komunitas ikan di padang lamun perairan Ternate Maluku Utara. Pengumpulan data dilakukan dengan menggunakan metode Underwater Visual Census ( UVC) selama 12 hari pada sepuluh stasiun penelitian.Berdasarkan hasil pengamatan di padang lamun perairan Ternate, Maluku Utara ditemukan sebanyak 1105 individu terdiri dari 56 jenis dari 22 famili. Berdasarkan hasil analisis struktur komunitas, nilai indeks keanekaragaman 1.69, indeks keseragaman 0.68, dan indeks dominansi 0.32 yang menunjukkan keanekaragaman spesies rendah dengan stabilitas komunitas yang labil. Seagrass is a plant...
Research on seasonal variations of temperature, salinity and turbidity of the Lembeh Strait’s wat... more Research on seasonal variations of temperature, salinity and turbidity of the Lembeh Strait’s waters were carried out in March 2016 to February 2017. Observations of temperature, salinity and turbidity were conducted using the Sonde EXO-2 multi parameter tool. The purpose of this study was to determine the seasonal effect on temperature, salinity and turbidity Lembeh Strait’s water. The results of the statistical analysis using ANOVA and Tuckey's test showed that the season affected the salinity and temperature, whereas no significant effect were observed on turbidity. Variations in temperature, salinity and turbidity are affected by external factors such as weather, wind and seasonal current patterns occurred in these waters. The conditions of temperature, salinity and turbidity of sea water in Lembeh Strait are still adequate for marine life.Keywords: temperature, salinity, turbidity, oceanography, Lembeh Strait
Fish species composition and spatio-temporal variability of the community were studied in a tropi... more Fish species composition and spatio-temporal variability of the community were studied in a tropical seagrass meadow located in a lagoon in the eastern part of North Sulawesi. The diversity of fish community in the seagrass meadows was relatively high, with the Shannon-Wiener index ranging from 1.57 to 3.69. The family Apogonidae was the most dominant in abundance (8.27 ind./(100 m 2)) and biomass (28.49 g/(100 m 2)). At the species level, Apogon lateralis and Sphaeramia orbicularis were the most dominant species in abundance and biomass, respectively. For spatial distribution on species, the end, middle and mouth of the lagoon clustered together as a whole, which may be due to the substrate types found in those zones. The fish species, fish abundance and fish biomass were greater in the dry and wet seasons than in the transition season, which is explained by the strong monsoon, which provides a more suitable environment and food for the fish. The maximum length of 93.10% of the captured species was less than their length at maturity, indicating that seagrass meadows are nursery habitats for many fishes. Therefore, protection of the seagrass meadows is essential for fisheries and sustainable resource utilization.
Pterapogon kauderni merupakan salah satu spesies ikan hias laut endemik Indonesia yang memiliki n... more Pterapogon kauderni merupakan salah satu spesies ikan hias laut endemik Indonesia yang memiliki nilai komersial yang cukup tinggi pada perdagangan ikan hias internasional. Populasi ikan inidi alamtelah nyata mengalami penurunan akibat dari penangkapan berlebihan tampa memperhatikan aspek biologis maupun ekologis.Pengamatanterhadap ikan Banggai Cardinaldi perairan Teluk Ambon Dalamdilakukan untuk mengetahui jumlah populasi dan dugaan stok ikan.Hasilnya menunjukkan bawa populasi ikan tertinggi terdapat pada lokasi Poka,dengan nilaidensitas0,17-0,42 ekor/m²dandugaan populasi mencapai 25411 ekor. Populasiikan terendah terdapat di Waiheru dengan densitas0,05-0,06 ekor/m² serta dugaan populasi mencapai 2556 ekor.Kelimpahan populasi ikanhias ini berhubungan erat dengan kelimpahan bulu babi yang merupakan mikrohabitat utamanya pada daerah lamun dan terumbu karang. Kata kunci: Populasi, habitat, Pterapogon kauderni, Teluk Ambon Dalam.
Mangrove is one of the objects that can be identified by remote sensing technology using satellit... more Mangrove is one of the objects that can be identified by remote sensing technology using satellite imagery. Analysis of the distribution and density of mangrove vegetation using Landsat 8 imagery was carried out in Bolaang Mongondow Timur, North Sulawesi in September 2020. This study aims to map the distribution of mangroves and determine the correlation between NDVI values, canopy cover, and mangrove density. The data analysis used Landsat 8 images with ENVI 5.3 and ArcGIS 10.1 software. Maximum likelihood classification is used to separate mangrove and non-mangrove features. The calculation of mangrove vegetation density using the NDVI algorithm and single-channel classification using the density slice method to divide mangrove density based on the range of pixel values of the NDVI image. Next, to test the accuracy of the classification results using an error matrix (confusion matrix) and the NDVI vegetation index correlation test compared with canopy cover and density data. The c...
Oxygen in seawater comes from the air through diffusion and photosynthesis. This study aims to de... more Oxygen in seawater comes from the air through diffusion and photosynthesis. This study aims to determine the dissolved oxygen content, NAEC (Normal Atmospheric Equilibrium Concentration), and AOU (Apparent Oxygen Utilization) in East Bolaang Mongondow waters. The analysis showed that the dissolved oxygen content in the surface layer ranged from 6.01-7.05 mg/l; 5.91-6.98 mg/l (5 m depth); and 5.75-6.90 mg/l (near bottom depth). NAEC is closely related to water temperature and implicitly increases with depth. The highest NAEC value of 5.90 mg/l (t=28.0ºC) was found at the bottom depth, and the lowest NAEC of 5.63 mg/l (t=30.0ºC) was found at the surface layer. The dissolved oxygen saturation level of more than 100% and the average positive AOU value at 0.59-0.81 mg/l describe the amount of oxygen available in the surface layer.Keywords: Dissolved Oxygen; Normal Atmospheric Equilibrium Concentration (NAEC); Apparent Oxygen Utilization (AOU); East Bolaang Mongondow.AbstrakOksigen dalam ...
Ikan capungan Banggai atau yang lebih dikenal sebagai Banggai Cardinalfish / BCF (Pte... more Ikan capungan Banggai atau yang lebih dikenal sebagai Banggai Cardinalfish / BCF (Pterapogon kauderni) diketahui sebagai ikan endemik di perairan Kepulauan Banggai, Sulawesi Tengah, Indonesia. Beberapa waktu terakhir ini, ikan capungan Banggai ditemukan di beberapa wilayah lain di Indonesia sebagai dampak sampingan dari aktivitas perdagangan maupun kegiatan penelitian di bidang budidaya. Salah satu wilayah yang menjadi lokasi baru sebaran populasi ikan capungan Banggai di Indonesia adalah perairan Gilimanuk, Bali. Keberadaan ikan capungan Banggai di perairan ini pertama kali diketahui pada awal tahun 90an. Penelitian tentang status populasi ikan capungan Banggai di wilayah ini telah dilakukan pada bulan Maret 2018. Metode yang digunakan pada penelitian ini adalah modifikasi dari metode Belt Transect, yaitu pengamatan pada transek sepanjang 20 m dengan area bidang pengamatan 2,5 m di sebelah kanan dan kiri garis transek dengan enam ...
Observation of water quality in Raja Ampat Islands Natural Water Reserve (SAP Kepulauan Raja Ampa... more Observation of water quality in Raja Ampat Islands Natural Water Reserve (SAP Kepulauan Raja Ampat), was carried out in August-September 2019. This study aims to determine the water quality and the pollution’s status based on the water physical parameters. Measurement of all parameters was conducted in-situ using the EXO-2 device, while the water clarity was measured with a Secchi disk. The results of statistical analysis using the T-Test showed that the TDS content in the surface layer compared to the bottom was significantly different. Pollution index calculation results show that the waters of the Raja Ampat Islands are still in good condition (not polluted). Variations in temperature, salinity, brightness/clarity, turbidity, conductivity (DHL) and the dissolved solids values (TDS) are still adequate for the well-being of coral reefs and various marine biota inhabited the waters.Keywords: Water quality, physical characteristics, Raja Ampat ABSTRAKPengamatan kualitas air di SAP Ke...
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