Pub Date : 2021-12-01DOI: 10.24843/jmas.2021.v07.i02.p12
I. M. Arta, I. P. Dirgayusa, Ni Luh Putu Ria Puspitha
This research was conducted at Geger Beach, Nusa Dua, Bali for 60 days. The purpose of this study was to find out the ratio of abalone growth rate (Haliotis squamata) to co-cultured and monoculture cultivation systems in Geger Beach waters, Nusa Dua, Bali, knowing that abalone stocking densities were more effective in culture systems and knowing more abalone stocking densities effective on monoculture systems. The method used uses the Complete Randomized Design (CRD) method which consists of four treatments with each treatment there are three repetitions. The treatment of Haliotis squamata abalone shells which is integrated with dense stocking differs from planting the same seaweed. The test animals were stocked with each basket with a density of 40 tails and 20 tails. The food given for abalone is cotoni sp. which is where seaweed cotoni sp. obtained from cultivation. Based on the comparison of the growth rate of abalone (Haliotis squamata) in co-culture and monoculture cultivation in terms of abalone length with stocking density 20 of the co-culture cultivation system obtains the highest length value of 2.50%, while the co-culture cultivation system with stocking density 40 gets the value the highest is 4.19%. At the weight of the Haliotis squamata abalone with the co-culture cultivation system at 20 stocking densities, the highest value was 0.04% and 40 highest stocking densities on the co-culture system at 1.04%. At the length of the abalone Haliotis squamata with 20 thick stocking monoculture systems got the highest value of 7.63%, while the highest stocking density of 40 was 1.28%. On abalone weight monoculture system with 20 density has the highest value of 2.67%, while 40 density has the highest value of 0.48%.
{"title":"Perbandingan Laju Pertumbuhan Abalon (Haliotis squamata) Menggunakan Metode Co-culture Dan Monoculture di Pantai Geger, Nusa Dua, Kabupaten Badung, Bali","authors":"I. M. Arta, I. P. Dirgayusa, Ni Luh Putu Ria Puspitha","doi":"10.24843/jmas.2021.v07.i02.p12","DOIUrl":"https://doi.org/10.24843/jmas.2021.v07.i02.p12","url":null,"abstract":"This research was conducted at Geger Beach, Nusa Dua, Bali for 60 days. The purpose of this study was to find out the ratio of abalone growth rate (Haliotis squamata) to co-cultured and monoculture cultivation systems in Geger Beach waters, Nusa Dua, Bali, knowing that abalone stocking densities were more effective in culture systems and knowing more abalone stocking densities effective on monoculture systems. The method used uses the Complete Randomized Design (CRD) method which consists of four treatments with each treatment there are three repetitions. The treatment of Haliotis squamata abalone shells which is integrated with dense stocking differs from planting the same seaweed. The test animals were stocked with each basket with a density of 40 tails and 20 tails. The food given for abalone is cotoni sp. which is where seaweed cotoni sp. obtained from cultivation. Based on the comparison of the growth rate of abalone (Haliotis squamata) in co-culture and monoculture cultivation in terms of abalone length with stocking density 20 of the co-culture cultivation system obtains the highest length value of 2.50%, while the co-culture cultivation system with stocking density 40 gets the value the highest is 4.19%. At the weight of the Haliotis squamata abalone with the co-culture cultivation system at 20 stocking densities, the highest value was 0.04% and 40 highest stocking densities on the co-culture system at 1.04%. At the length of the abalone Haliotis squamata with 20 thick stocking monoculture systems got the highest value of 7.63%, while the highest stocking density of 40 was 1.28%. On abalone weight monoculture system with 20 density has the highest value of 2.67%, while 40 density has the highest value of 0.48%.","PeriodicalId":30849,"journal":{"name":"Journal of Marine and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45042271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-09DOI: 10.24843/jmas.2021.v07.i01.p16
Anak Agung Ayu Mirah Windy Kirana, Elok Faiqoh, I. Karang
Echinoderms in marine ecology have a role as deposit feeders. This shows the diversity of the Echinoderms phylum found in seagrass ecosystems. Seagrass beds serve as protection and a source of nutrients that maintain the food chain. Tanjung Benoa waters are located in the waters of South Bali which has a seagrass ecosystem. Echinoderms as invertebrate animals can be influenced by abiotic factors, namely salinity and temperature which are affected by the season. This study aims to determine changes in the structure of the Echinodermata community in the western and transitional seasons I in seagrass ecosystems and determine the environmental factors that influence the structure of the Echinoderms community in the waters of Tanjung Benoa. Echinoderms data collection method used is the Underwater Visual Census (UVC) method. Data is taken by using purposive sampling technique. The results showed that in both seasons, the western season and the transitional season I, the phylum of Echinoderms found consisted of 4 classes namely Holothuroidea, Ophiuroidea, Echinoidea and Asteroidea. The diversity index and uniformity of the Ecinodermal phylum found in both seasons shows stable diversity and uniformity. Based on the index of dominance there is one genus that dominates, namely the genus Diadema. Based on the analysis of PCA in the west season, the density of Echinoderms is influenced by phosphate, nitrate, DO, salinity, pH and temperature. Whereas in the transitional season I density is influenced by phosphate, salinity, temperature, nitrate and pH.
{"title":"Struktur Komunitas Echinodermata pada Musim Barat dan Musim Peralihan I di Ekosistem Lamun Perairan Tanjung Benoa, Bali","authors":"Anak Agung Ayu Mirah Windy Kirana, Elok Faiqoh, I. Karang","doi":"10.24843/jmas.2021.v07.i01.p16","DOIUrl":"https://doi.org/10.24843/jmas.2021.v07.i01.p16","url":null,"abstract":"Echinoderms in marine ecology have a role as deposit feeders. This shows the diversity of the Echinoderms phylum found in seagrass ecosystems. Seagrass beds serve as protection and a source of nutrients that maintain the food chain. Tanjung Benoa waters are located in the waters of South Bali which has a seagrass ecosystem. Echinoderms as invertebrate animals can be influenced by abiotic factors, namely salinity and temperature which are affected by the season. This study aims to determine changes in the structure of the Echinodermata community in the western and transitional seasons I in seagrass ecosystems and determine the environmental factors that influence the structure of the Echinoderms community in the waters of Tanjung Benoa. Echinoderms data collection method used is the Underwater Visual Census (UVC) method. Data is taken by using purposive sampling technique. The results showed that in both seasons, the western season and the transitional season I, the phylum of Echinoderms found consisted of 4 classes namely Holothuroidea, Ophiuroidea, Echinoidea and Asteroidea. The diversity index and uniformity of the Ecinodermal phylum found in both seasons shows stable diversity and uniformity. Based on the index of dominance there is one genus that dominates, namely the genus Diadema. Based on the analysis of PCA in the west season, the density of Echinoderms is influenced by phosphate, nitrate, DO, salinity, pH and temperature. Whereas in the transitional season I density is influenced by phosphate, salinity, temperature, nitrate and pH.","PeriodicalId":30849,"journal":{"name":"Journal of Marine and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41901974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-05DOI: 10.24843/jmas.2021.v07.i01.p15
Dewa Ayu Sri Astiti, Elok Faiqoh, I. N. W. Putra
Tanjung Benoa is a waters in Bali that is influenced by the monsoon pattern system which has a different circulation pattern of water masses and varies between seasons. The difference in mass of water resulted in changes in the condition of the waters that affect the high and low productivity of the waters and abundance of mollusks in the waters of Tanjung Benoa. Mollusks have an important role for the aquatic environment, namely as a bio-indicator of environmental health and water quality. This study aims to determine the structure of the molluscs community and determine the environmental factors that influence the western season and the transition season I. Sampling is done in January 2019 (west season) and in March 2019 (Transition I). The results of the analysis showed a decrease in diversity and uniformity occurred in the fourth week (west season) and the seventh week (transition season I) with the category of moderate species diversity and medium type uniformity. The low value of uniformity and diversity in the western season is influenced by increasing pH values and decreasing waters nitrate values. When compared with the western season, in the transition season I the increase in temperature and a decrease in phosphate value occur in the seventh week. this result was obtained using principal component analysis (PCA) that used the environmental parameter index and the value of diversity and uniformity of mollusks. However, this value is still in the medium category. So it can be seen in the western season and the transition season. The state of mollusks in Tanjung Benoa waters is stable and can adapt to seasonal changes and environmental conditions.
{"title":"Struktur Komunitas Moluska pada Musim Barat dan Musim Peralihan I di Perairan Tanjung Benoa Badung, Bali","authors":"Dewa Ayu Sri Astiti, Elok Faiqoh, I. N. W. Putra","doi":"10.24843/jmas.2021.v07.i01.p15","DOIUrl":"https://doi.org/10.24843/jmas.2021.v07.i01.p15","url":null,"abstract":"Tanjung Benoa is a waters in Bali that is influenced by the monsoon pattern system which has a different circulation pattern of water masses and varies between seasons. The difference in mass of water resulted in changes in the condition of the waters that affect the high and low productivity of the waters and abundance of mollusks in the waters of Tanjung Benoa. Mollusks have an important role for the aquatic environment, namely as a bio-indicator of environmental health and water quality. This study aims to determine the structure of the molluscs community and determine the environmental factors that influence the western season and the transition season I. Sampling is done in January 2019 (west season) and in March 2019 (Transition I). The results of the analysis showed a decrease in diversity and uniformity occurred in the fourth week (west season) and the seventh week (transition season I) with the category of moderate species diversity and medium type uniformity. The low value of uniformity and diversity in the western season is influenced by increasing pH values and decreasing waters nitrate values. When compared with the western season, in the transition season I the increase in temperature and a decrease in phosphate value occur in the seventh week. this result was obtained using principal component analysis (PCA) that used the environmental parameter index and the value of diversity and uniformity of mollusks. However, this value is still in the medium category. So it can be seen in the western season and the transition season. The state of mollusks in Tanjung Benoa waters is stable and can adapt to seasonal changes and environmental conditions.","PeriodicalId":30849,"journal":{"name":"Journal of Marine and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47657610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-04DOI: 10.24843/jmas.2021.v07.i01.p14
Janis Khansa Putri Argeswara, I. G. Hendrawan, I. S. Dharma, Elitza Germanov
Microplastic, the pieces of plastic sized < 5 mm, are dangerous materials for marine organisms where if is ingested can anatomically and physiogically change the marine organism. Manta rays (Mobula alfredi) are filter feeders where they eat planktons and small fishes by filtering seawater. Mantas can filter up to hundreds cubic meter everyday, indicating the chances of it ingesting microplastics. This research was conducted to find out the microplastic characteristics at Big Manta Bay, Nusa Penida. Samples were obtained at two sites, North and South Big Manta Bay, by trawling 6 times on each site that represents Big Manta Bay using a plankton net. Samples were processed by separating plastics and organic matters using density separation method, and afterwards identified based on its type, quantity and size using a dissecting microscope. Results from the research came back stating the microplastic abundance reached 123,767 pieces/km2, with a total number of microplastics up to 174 pcs. The types of plastics most frequently found are fragments (44,69%), films (38,55%), fiber (14,53%) and foam (2,23%). Samples were also analysed using FTI-R Spectrometry, where plastics are identified as Polypropylene (PP) and Low-density Polyethylene (LDPE). Both polymers are the top two polymers that are produced globally.
{"title":"Karakteristik Mikroplastik pada Daerah Feeding Ground Pari Manta, Big Manta Bay, Nusa Penida","authors":"Janis Khansa Putri Argeswara, I. G. Hendrawan, I. S. Dharma, Elitza Germanov","doi":"10.24843/jmas.2021.v07.i01.p14","DOIUrl":"https://doi.org/10.24843/jmas.2021.v07.i01.p14","url":null,"abstract":"Microplastic, the pieces of plastic sized < 5 mm, are dangerous materials for marine organisms where if is ingested can anatomically and physiogically change the marine organism. Manta rays (Mobula alfredi) are filter feeders where they eat planktons and small fishes by filtering seawater. Mantas can filter up to hundreds cubic meter everyday, indicating the chances of it ingesting microplastics. This research was conducted to find out the microplastic characteristics at Big Manta Bay, Nusa Penida. Samples were obtained at two sites, North and South Big Manta Bay, by trawling 6 times on each site that represents Big Manta Bay using a plankton net. Samples were processed by separating plastics and organic matters using density separation method, and afterwards identified based on its type, quantity and size using a dissecting microscope. Results from the research came back stating the microplastic abundance reached 123,767 pieces/km2, with a total number of microplastics up to 174 pcs. The types of plastics most frequently found are fragments (44,69%), films (38,55%), fiber (14,53%) and foam (2,23%). Samples were also analysed using FTI-R Spectrometry, where plastics are identified as Polypropylene (PP) and Low-density Polyethylene (LDPE). Both polymers are the top two polymers that are produced globally.","PeriodicalId":30849,"journal":{"name":"Journal of Marine and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42716410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-02DOI: 10.24843/jmas.2021.v07.i01.p12
Rizaldi Cahya Bramasta, Elok Faiqoh, I. Hendrawan, Andrianus Sembiring, Ni Luh Astria Yusmalinda
Sharks are one of the keys for ecosystems balance in the ocean. Sharks as top predators have an important role to maintain the stability of the food chain in the ocean. The loss of sharks will have a major impact on the marine ecosystem, so the presence of sharks in the ocean must be protected from extinction. However, there are some activities such as sharks hunting and trading going on because of the high demand of sharks processed products. Bali is one of the locations of shark fishing and trading activities. The problem is the trade-in sharks have gone through the finning process, leaving only the body parts or fins which resulted in the difficulty of morphological identification process. An alternative method that can be used if molecular identification cannot be done is DNA Barcoding. DNA Barcoding means identifying all the animal species with an effective molecular approach applied to identify species. The identification results of DNA Barcoding of shark’s trade in Bali shows that there are four species of sharks have been sold, which is hammerhead sharks (Sphyrna lewini), thresher sharks (Alopias pelagicus), big eye thresher shark (Alopias superliciosus), silky sharks (Carcharinus falciformis). These sharks registered in the IUCN red list, Sphyrna lewini classified as threatened species, while the others (Alopias pelagicus, Alopias superciliosus and Carcharinus falciformis) classified as vulnerable species. In the international trade regulations on CITES, these four species come under the Appendix II. In national regulations, Alopias pelagicus, Alopias superciliosus, Sphyrna lewini have been regulated by the Ministerial regulations, while for Carcharinus falciformis, there are no national regulations yet.
{"title":"Identifikasi Hiu yang Diperdagangkan di Bali Menggunakan Metode DNA Barcoding dan Analisis Filogenetik","authors":"Rizaldi Cahya Bramasta, Elok Faiqoh, I. Hendrawan, Andrianus Sembiring, Ni Luh Astria Yusmalinda","doi":"10.24843/jmas.2021.v07.i01.p12","DOIUrl":"https://doi.org/10.24843/jmas.2021.v07.i01.p12","url":null,"abstract":"Sharks are one of the keys for ecosystems balance in the ocean. Sharks as top predators have an important role to maintain the stability of the food chain in the ocean. The loss of sharks will have a major impact on the marine ecosystem, so the presence of sharks in the ocean must be protected from extinction. However, there are some activities such as sharks hunting and trading going on because of the high demand of sharks processed products. Bali is one of the locations of shark fishing and trading activities. The problem is the trade-in sharks have gone through the finning process, leaving only the body parts or fins which resulted in the difficulty of morphological identification process. An alternative method that can be used if molecular identification cannot be done is DNA Barcoding. DNA Barcoding means identifying all the animal species with an effective molecular approach applied to identify species. The identification results of DNA Barcoding of shark’s trade in Bali shows that there are four species of sharks have been sold, which is hammerhead sharks (Sphyrna lewini), thresher sharks (Alopias pelagicus), big eye thresher shark (Alopias superliciosus), silky sharks (Carcharinus falciformis). These sharks registered in the IUCN red list, Sphyrna lewini classified as threatened species, while the others (Alopias pelagicus, Alopias superciliosus and Carcharinus falciformis) classified as vulnerable species. In the international trade regulations on CITES, these four species come under the Appendix II. In national regulations, Alopias pelagicus, Alopias superciliosus, Sphyrna lewini have been regulated by the Ministerial regulations, while for Carcharinus falciformis, there are no national regulations yet.","PeriodicalId":30849,"journal":{"name":"Journal of Marine and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46451973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-02DOI: 10.24843/jmas.2021.v07.i01.p13
Enex Yuniarti Ningsih, Elok Faiqoh, Ida Ayu Astarini, Putu Dian Pertiwi, Andrianus Sembiring, Ni Luh Astria Yusmalinda, Muhammad Danie Al Malik
Longtail tuna (Thunnus tonggol) is one of the oceanodromus neritic species and the migration pattern follows the water currents. Currently, this species has not been widely studied in Indonesian waters, so it is nesessary to study the identification of morphology and genetic diversity. The molecular approach employed in this study is DNA barcoding using mitochondrial D – loop locus. This study can explain the importance of species genetic information in stability and resilience. This study aims to determine the identification of morphology, phylogenetic and genetic diversity of longtail tuna at two locations in PPI Kedonganan, Bali dan PPP Muncar, Banyuwangi. The molecular analysis was done in several stages, i.e DNA extraction, Polymerase Chain Reaction, electrophoresis and sequencing. Based on the result of sequencing and analysis, 33 samples of longtail tuna was found. The result of phylogenetic tree reconstruction from two locations showed one clade with genetic distance value among longtail tuna species ranging from 0.000 – 0.042 for all close kinship samples. The haplotype diversity (Hd) value of longtail tuna was 0.9905 and nucleotide diversity (?) was 0.020. The high value of genetic diversity indicated that two longtail tuna populations have a high survival ability to adapt on environmental changes. Index fixation analysis (Fst) has a value of 0.0299, p - value > 0.05. The index fixation value indicated no significant population difference. The result of this study can be use as basic data in planning genetic conservation strategies with sustainable fisheries management efforts. Keywords: Tuna; Thunnus tonggol; Genetic Marker
{"title":"Identifikasi dan Keragaman Genetik Longtail Tuna (Thunnus tonggol) Yang Didaratkan di PPI Kedonganan dan PPP Muncar Menggunakan Marka D-loop Mitokondria","authors":"Enex Yuniarti Ningsih, Elok Faiqoh, Ida Ayu Astarini, Putu Dian Pertiwi, Andrianus Sembiring, Ni Luh Astria Yusmalinda, Muhammad Danie Al Malik","doi":"10.24843/jmas.2021.v07.i01.p13","DOIUrl":"https://doi.org/10.24843/jmas.2021.v07.i01.p13","url":null,"abstract":"Longtail tuna (Thunnus tonggol) is one of the oceanodromus neritic species and the migration pattern follows the water currents. Currently, this species has not been widely studied in Indonesian waters, so it is nesessary to study the identification of morphology and genetic diversity. The molecular approach employed in this study is DNA barcoding using mitochondrial D – loop locus. This study can explain the importance of species genetic information in stability and resilience. This study aims to determine the identification of morphology, phylogenetic and genetic diversity of longtail tuna at two locations in PPI Kedonganan, Bali dan PPP Muncar, Banyuwangi. The molecular analysis was done in several stages, i.e DNA extraction, Polymerase Chain Reaction, electrophoresis and sequencing. Based on the result of sequencing and analysis, 33 samples of longtail tuna was found. The result of phylogenetic tree reconstruction from two locations showed one clade with genetic distance value among longtail tuna species ranging from 0.000 – 0.042 for all close kinship samples. The haplotype diversity (Hd) value of longtail tuna was 0.9905 and nucleotide diversity (?) was 0.020. The high value of genetic diversity indicated that two longtail tuna populations have a high survival ability to adapt on environmental changes. Index fixation analysis (Fst) has a value of 0.0299, p - value > 0.05. The index fixation value indicated no significant population difference. The result of this study can be use as basic data in planning genetic conservation strategies with sustainable fisheries management efforts. \u0000Keywords: Tuna; Thunnus tonggol; Genetic Marker","PeriodicalId":30849,"journal":{"name":"Journal of Marine and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43233598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-29DOI: 10.24843/jmas.2021.v07.i01.p11
Ira Fitriana, Yulianto Suteja, I. Hendrawan
Benoa Bay is a waters that have tourism activities, ship transportation routes and aquaculture. The reasearch of phytoplankton community structure conducted in February 2019. Phytoplankton sampling carried out horizontally by pulling the plankton net using a ship for 5 minutes. The plankton net used has a 30 µm meshsize, 50 cm in diameter and 1.5 meters in length. The composition of phytoplankton species consisted of Bacillariophyceae and Dinophyceae classes. The total abundance of phytoplankton individuals ranged from 268.07 sel/l to 2,500.59 sel/l with an average value 878.87 sel/l. The value range of phytoplankton diversity index was 0,31 to 1,47, with an average value is 0.87. This shows that in general the phytoplankton community has low diversity (H'<1). The phytoplankton uniformity index ranged from 0,14 - 0,58, with an average value is 0,35. This shows that in general the phytoplankton community has low uniformity (E<0.4). The value range of dominance index was 0,31 to 0,89, with an average value is 0.63. This shows that in general the dominance value is high (1>C>0.5). Relatively low uniformity values with relatively high dominance values indicate that the genus found during the study has a non-uniform composition and there is a dominating genus, namely the genus Coscinodiscus from the Bacillariophyceae class.
{"title":"Struktur Komunitas Fitoplankton di Perairan Teluk Benoa, Bali","authors":"Ira Fitriana, Yulianto Suteja, I. Hendrawan","doi":"10.24843/jmas.2021.v07.i01.p11","DOIUrl":"https://doi.org/10.24843/jmas.2021.v07.i01.p11","url":null,"abstract":"Benoa Bay is a waters that have tourism activities, ship transportation routes and aquaculture. The reasearch of phytoplankton community structure conducted in February 2019. Phytoplankton sampling carried out horizontally by pulling the plankton net using a ship for 5 minutes. The plankton net used has a 30 µm meshsize, 50 cm in diameter and 1.5 meters in length. The composition of phytoplankton species consisted of Bacillariophyceae and Dinophyceae classes. The total abundance of phytoplankton individuals ranged from 268.07 sel/l to 2,500.59 sel/l with an average value 878.87 sel/l. The value range of phytoplankton diversity index was 0,31 to 1,47, with an average value is 0.87. This shows that in general the phytoplankton community has low diversity (H'<1). The phytoplankton uniformity index ranged from 0,14 - 0,58, with an average value is 0,35. This shows that in general the phytoplankton community has low uniformity (E<0.4). The value range of dominance index was 0,31 to 0,89, with an average value is 0.63. This shows that in general the dominance value is high (1>C>0.5). Relatively low uniformity values with relatively high dominance values indicate that the genus found during the study has a non-uniform composition and there is a dominating genus, namely the genus Coscinodiscus from the Bacillariophyceae class.","PeriodicalId":30849,"journal":{"name":"Journal of Marine and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42952224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-27DOI: 10.24843/jmas.2021.v07.i01.p10
Angginie Adjeng Ayoe Gigih Pangesthu, Yulianto Suteja, W. Widiastuti
Organic material is one of the pollutants found in marine water, the presence of organic matter can be detected through bioindicators such as plankton by calculating the level of saprobitas waters. Research related to plankton saprobitas in the waters of Benoa Bay has been carried out around the waters of the port of Benoa. The purpose of this study was to determine the community structure and saprobitas level of plankton in the waters of Benoa Bay. The saprobic plankton level was calculated using two equations, namely Saprobic Index (SI) and Trophic Saprobic Index (TSI). Both indexes use the presence of plankton in the water to determine the pollution status of a waters. The results of the study showed that 22 types of phytoplankton from three classes Bacillariophyceae, Cyanophyceae and Dinophyceae and three types of zooplankton from two classes Crustacea and Malacostraca. The Saprobic Index (SI) values range from 1-1.7 and the Trophic Saprobic Index (TSI) ranges between 1.01-1.44. This shows that Benoa Bay waters are in the ?-mesosaprobic to oligosaprobic contamination phase. In the ?-mesosaprobic phase, the condition of the waters with high DO waters, the number of medium level of bacteria density and the last product produced is the last product of nitrate. The oligosaprobic it has very low bacterial conditions and perfect decomposition of organic matter. The ?-mesosaprobic and oligosaprobic phases indicate that the pollution that is taking place in the waters of Benoa Bay was mild to moderate pollution.
{"title":"Penilaian Pencemaran Bahan Organik Perairan di Teluk Benoa Ditinjau dari Tingkat Saprobitas","authors":"Angginie Adjeng Ayoe Gigih Pangesthu, Yulianto Suteja, W. Widiastuti","doi":"10.24843/jmas.2021.v07.i01.p10","DOIUrl":"https://doi.org/10.24843/jmas.2021.v07.i01.p10","url":null,"abstract":"Organic material is one of the pollutants found in marine water, the presence of organic matter can be detected through bioindicators such as plankton by calculating the level of saprobitas waters. Research related to plankton saprobitas in the waters of Benoa Bay has been carried out around the waters of the port of Benoa. The purpose of this study was to determine the community structure and saprobitas level of plankton in the waters of Benoa Bay. The saprobic plankton level was calculated using two equations, namely Saprobic Index (SI) and Trophic Saprobic Index (TSI). Both indexes use the presence of plankton in the water to determine the pollution status of a waters. The results of the study showed that 22 types of phytoplankton from three classes Bacillariophyceae, Cyanophyceae and Dinophyceae and three types of zooplankton from two classes Crustacea and Malacostraca. The Saprobic Index (SI) values range from 1-1.7 and the Trophic Saprobic Index (TSI) ranges between 1.01-1.44. This shows that Benoa Bay waters are in the ?-mesosaprobic to oligosaprobic contamination phase. In the ?-mesosaprobic phase, the condition of the waters with high DO waters, the number of medium level of bacteria density and the last product produced is the last product of nitrate. The oligosaprobic it has very low bacterial conditions and perfect decomposition of organic matter. The ?-mesosaprobic and oligosaprobic phases indicate that the pollution that is taking place in the waters of Benoa Bay was mild to moderate pollution.","PeriodicalId":30849,"journal":{"name":"Journal of Marine and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48646114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-25DOI: 10.24843/jmas.2021.v07.i01.p09
Rifaldus Dani, I. W. Arthana, N. Ernawati
Mangrove is a typical forest and grows along the coast or river estuaries that are affected by tidal of sea water. The aims are to determine the mangrove vegetation and abundance of associated (Crustacea) in the South Coast of East Manggarai Regency. Important value, density relative, frequency relative, index uniformity and diversity obtained from vegetation analysis used as indicators to describe vegetation structure and mangrove forest diversity as well as the abundance of associated Crustaceans. This research was conducted in mangrove forest in South Beach of East Manggarai Regency in February until March 2017. To support the research, water quality measurement on mangrove forest was conducted. Measurement of water quality is done in situ (temperature, pH and salinity). Methods used in this study the quantitative descriptive. Determination of the sampling done by means of purposive sampling. A kind of the mangrove found to consist of 7 species that Avicennia lanata, Rhizophora mucronata, Ceriops decandra, Bruguiera gymnorrhiza, Sonneratia alba, Sonneratia casiolaris, And Xylocarpus granatum. The diversity category in a low and index mangrove uniformity category in a high. While the Important Value Analysis shows that Avicenia Lanata species have the highest importance compared to other species. The water quality in the South Coast of East Manggarai Regency are still worth to support life and development mangrove. Abundance Crustacea higher at the station I by abundance of 7,6 ind / m2.
{"title":"Analisis Vegetasi Mangrove dan Kelimpahan Biota (Crustacea) yang Berasosiasi di Pantai Selatan Kabupaten Manggarai Timur","authors":"Rifaldus Dani, I. W. Arthana, N. Ernawati","doi":"10.24843/jmas.2021.v07.i01.p09","DOIUrl":"https://doi.org/10.24843/jmas.2021.v07.i01.p09","url":null,"abstract":"Mangrove is a typical forest and grows along the coast or river estuaries that are affected by tidal of sea water. The aims are to determine the mangrove vegetation and abundance of associated (Crustacea) in the South Coast of East Manggarai Regency. Important value, density relative, frequency relative, index uniformity and diversity obtained from vegetation analysis used as indicators to describe vegetation structure and mangrove forest diversity as well as the abundance of associated Crustaceans. This research was conducted in mangrove forest in South Beach of East Manggarai Regency in February until March 2017. To support the research, water quality measurement on mangrove forest was conducted. Measurement of water quality is done in situ (temperature, pH and salinity). Methods used in this study the quantitative descriptive. Determination of the sampling done by means of purposive sampling. A kind of the mangrove found to consist of 7 species that Avicennia lanata, Rhizophora mucronata, Ceriops decandra, Bruguiera gymnorrhiza, Sonneratia alba, Sonneratia casiolaris, And Xylocarpus granatum. The diversity category in a low and index mangrove uniformity category in a high. While the Important Value Analysis shows that Avicenia Lanata species have the highest importance compared to other species. The water quality in the South Coast of East Manggarai Regency are still worth to support life and development mangrove. Abundance Crustacea higher at the station I by abundance of 7,6 ind / m2.","PeriodicalId":30849,"journal":{"name":"Journal of Marine and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45130176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-22DOI: 10.24843/jmas.2021.v07.i01.p08
I. Kartika, A. Sari
Along with the development of tourism and the well-managed Nusa Dua area, local communities have the opportunity to be able to develop several beach tourism attractions, one of which is Segara Samuh Beach. One of the aquatic organisms that are generally affected by environmental changes is macrozoobenthos, especially the phylum Echinoderms. Based on this, it is necessary to conduct research on the composition of the species of Echinoderms and their distribution patterns. For this reason, it is necessary to conduct an inventory study of the types of echinoderms that exist in the waters of Segara Samuh Beach. This research will be conducted in the waters of Segara Samuh Beach (8° 47' 13.80'' South Latitude and 115° 13' 42.57'' East Longitude), North Kuta District, Badung Regency, Bali. The preliminary survey was carried out in April and data collection was carried out for 2 periods (May 2019 and August 2019). Sample inventory along with data processing and analysis was carried out at the Fisheries Laboratory, Faculty of Marine Affairs and Fisheries UNUD (Echinoderms sample). The largest species composition at Station I was sea cucumber (50%) and at Station II was dominated by snaking stars (54%). Stations III and IV have relatively the same or similar species composition (Figure 2). Subphylum Echinoidea is the species composition with the highest percentage, which are 78.79% and 80.95%, respectively. Other echinoderms found at these two stations were Asteroidea and Holothuroidea, 15.15% and 6.06%, respectively (Station III) and 14.29% and 4.76% (Station IV). Overall, the composition of the Echinoderm species consists mostly of the subphylum Echinoidea (47%), Ophiuroidea (47%), Asteroidea (7%), Holothuroidea (6%) and a little Crinoidea (1%).
{"title":"Inventarisasi Keanekaragaman dan Komposisi Jenis Echinodermata di Perairan Pantai Segara Samuh, Bali","authors":"I. Kartika, A. Sari","doi":"10.24843/jmas.2021.v07.i01.p08","DOIUrl":"https://doi.org/10.24843/jmas.2021.v07.i01.p08","url":null,"abstract":"Along with the development of tourism and the well-managed Nusa Dua area, local communities have the opportunity to be able to develop several beach tourism attractions, one of which is Segara Samuh Beach. One of the aquatic organisms that are generally affected by environmental changes is macrozoobenthos, especially the phylum Echinoderms. Based on this, it is necessary to conduct research on the composition of the species of Echinoderms and their distribution patterns. For this reason, it is necessary to conduct an inventory study of the types of echinoderms that exist in the waters of Segara Samuh Beach. This research will be conducted in the waters of Segara Samuh Beach (8° 47' 13.80'' South Latitude and 115° 13' 42.57'' East Longitude), North Kuta District, Badung Regency, Bali. The preliminary survey was carried out in April and data collection was carried out for 2 periods (May 2019 and August 2019). Sample inventory along with data processing and analysis was carried out at the Fisheries Laboratory, Faculty of Marine Affairs and Fisheries UNUD (Echinoderms sample). The largest species composition at Station I was sea cucumber (50%) and at Station II was dominated by snaking stars (54%). Stations III and IV have relatively the same or similar species composition (Figure 2). Subphylum Echinoidea is the species composition with the highest percentage, which are 78.79% and 80.95%, respectively. Other echinoderms found at these two stations were Asteroidea and Holothuroidea, 15.15% and 6.06%, respectively (Station III) and 14.29% and 4.76% (Station IV). Overall, the composition of the Echinoderm species consists mostly of the subphylum Echinoidea (47%), Ophiuroidea (47%), Asteroidea (7%), Holothuroidea (6%) and a little Crinoidea (1%).","PeriodicalId":30849,"journal":{"name":"Journal of Marine and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47238355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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