Jurnal Enggano最新文献

{"title":"PERAN CARA KARANTINA IKAN YANG BAIK (CKIB) DALAM PENCEGAHAN PENYAKIT VIRUS PADA UDANG VANAME (Litopenaeus vannamei) DI PROVINSI LAMPUNG","authors":"Sumino Sumino, I. Saputra, Herman Mude","doi":"10.31186/JENGGANO.5.2.258-272","DOIUrl":"https://doi.org/10.31186/JENGGANO.5.2.258-272","url":null,"abstract":"Provinsi Lampung merupakan salah satu wilayah penghasil udang vaname terbesar di Indonesia. Produktivitas udang vaname di Lampung mengalami pasang surut, salah satunya dikarenakan serangan penyakit golongan virus seperti WSSV, IHHNV dan IMNV. Penelitian ini bertujuan untuk mengevaluasi status penyebaran penyakit WSSV, IHHNV dan IMNV pada udang vaname dan mengevaluasi keefektifan penerapan Cara Karantina Ikan yang Baik (CKIB) dalam menekan penyebaran virus tersebut di Provinsi Lampung. Pada penelitian ini, dilakukan pengumpulan data pengujian pada tahun 2019 yang berasal dari sampel umum, kegiatan pemantauan Penyakit Ikan Karantina (PIK) dan kegiatan CKIB, kemudian dilakukan analisa secara deskriptif. Hasil penelitian menunjukkan bahwa di Provinsi Lampung masih terdapat penyakit virus udang yaitu WSSV, IHHNV dan WSSV yang tersebar di sentra budidaya udang vaname. Dari sejumlah 624 total sampel pengujian, sebanyak 8.97% positif terinfeksi penyakit virus. WSSV memiliki tingkat infeksi terbesar yaitu 58.9%. Sedangkan untuk IMNV dan IHHNV masing-masing sebesar 33.9% dan 7.1%. Berdasarkan asal sampel pengujian dapat diketahui bahwa sampel yang diperoleh dari pembudidaya yang telah menerapkan CKIB menunjukkan hasil negatif untuk ketiga jenis virus target tersebut. Hal tersebut memberikan gambaran bahwa dengan penerapan CKIB secara konsisten dapat mengurangi tingkat penyebaran penyakit virus pada budidaya udang vaname.ROLES OF GOOD QUARANTINE PRACTICES IN THE SPREAD OF VIRUS DISEASES OF VANNAMEI SHRIMP (Litopenaeus vannamei) IN PROVINCE OF LAMPUNG. Lampung is one of the largest whiteleg shrimp (L. vannamei) producers in Indonesia. Whiteleg shrimp productivity in Lampung has fluctuated, one of which is due to infectious by virus disease. This study evaluated the current status of WSSV, IHHNV and WSSV diseases in whiteleg shrimp cultivation and assesses the effectivity of CKIB implementation in preventing the outspread of the shrimp viral diseases in Lampung. In this study, data from general samples, diseases monitoring/surveillance and Good Quarantine Practices (GQP) activities in 2019 were collected and then analyzed descriptively. Here, were report the emergence of shrimp viral diseases, e.g. WSSV, IHHNV and WSSV, in whiteleg shrimp aquaculture in Lampung. Infected shrimp were found in 8.97% of 624 tested samples. WSSV has the highest infection rate (58.9%) and followed by IMNV and IHHNV (33.9% and 7.1%, respectively). The samples collected from whiteleg shrimp aquaculture centre that applied GQP showed negative viral disease infection. These results demonstrate that consistent application of GQP in whiteleg shrimp cultivation can prevent the spread of shrimp viral disease.","PeriodicalId":33425,"journal":{"name":"Jurnal Enggano","volume":"232 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75118966","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}

{"title":"KEANEKARAGAMAN DAN KELIMPAHAN MAKROZOOBENTHOS PADA EKOSISTEM MANGROVE DESA DARUBA PANTAI KABUPATEN PULAU MOROTAI","authors":"Djainudin Alwi, Sandra Hi. Muhammad, Henderson Herat","doi":"10.31186/JENGGANO.5.1.64-77","DOIUrl":"https://doi.org/10.31186/JENGGANO.5.1.64-77","url":null,"abstract":"Ekosistem mangrove berperan sebagai habitat berbagai jenis satwa, salah satunya yaitu makrozoobenthos. Makrozoobenthos berperan sebagai konsumen primer dan ada pula yang berperan sebagai konsumen sekunder atau konsumen yang menempati tempat yang lebih tinggi. Pada umumnya, Makrozoobenthos merupakan makanan alami bagi berbagai satwa perairan yang berukuran besar. Penelitian ini bertujuan menganalisis kelimpahan makrozoobenthos dan menganalisis struktur komunitas makrozoobenthos di kawasan ekosistem mangrove Daruba Pantai. Penelitian ini dilaksanakan pada bulan November sampai Desember 2019 yang berlokasi di kawasan Mangrove Desa Daruba Pantai. Pengambilan data menggunakan metode sampel kuadrat (Quadrat Sampling) dengan ukuran plot 1x1 m2. Metode analisis data menggunakan analisis indeks ekologi seperti kelimpahan individu, kelimpahan relatif, keanekaragaman jenis, keseragaman dan dominasi. Hasil penelitian menunjukan kelimpahan individu makrozoobenthos tertinggi berada pada stasiun ke I yaitu 33,333 (Ind/m2) dan terendah berada di stasiun I dan II yaitu Polymesoda bengalensis 1,111 (Ind/m2). Sedangkan Kelimpahan Relatif tertinggi ada di stasiun II yaitu Episesarma (0,200 %) dan terendah ada di stasiun I dan II yaitu Polymesoda bengalensis (0,007 %). Hasil analisis indeks ekologi Keanekragaman (H’) stasiun I yaitu (2,146), stasiun II (2,158) dan stasiun III (2,131) termasuk dalam kategori sedang. Indeks Keseragaman (E) pada stasiun I berkisar (0,895), stasiun II (0,900), sedangkan pada stasiun III (0,925) termasuk dalam kategori tinggi. Indeks Dominasi pada stasiun I yaitu (0,132), stasiun II (0,132) dan pada stasiun III yaitu (0,130) termasuk dalam kategori rendah.THE DIVERSITY AND ABUNDANCE OF MACROZOOBENTHOS IN MANGROVE ECOSYSTEMS AT DARUBA VILLAGE COASTAL PULAU MOROTAI REGENCY. Mangrove ecosystems play a role as a habitat for various species of animals, one of which is macrozoobenthos. Macrozoobenthos acts as the primary consumer and some have a role as secondary consumers or consumers who occupy a higher place. In general, Macrozoobenthos is a natural food for a variety of large aquatic animals. This research aims to analyze the abundance of macrozoobenthos and analyze the structure of the macrozoos community in the area of the Daruba Coastal mangrove ecosystem. This research was conducted from November to December 2019 located in the Mangrove area of Daruba Pantai Village. Retrieval of data using the method of quadratic sampling (Quadrat Sampling) with a plot size of 1x1 m2. Data analysis methods use ecological index analysis such as individual abundance, relative abundance, species diversity, uniformity, and dominance. The results showed the highest abundance of macrozoobenthos individuals were at a station I which was 33,333 (Ind / m2) and the lowest was at stations I and II namely Polymesoda bengalensis 1.111 (Ind / m2). While the highest relative abundance in at station II, Episesarma (0.200%) and the lowest are at a station I and II, Pol","PeriodicalId":33425,"journal":{"name":"Jurnal Enggano","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86197509","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}

{"title":"VALUASI EKONOMI EKOSISTEM TERUMBU KARANG DI PULAU ENGGANO, KABUPATEN BENGKULU UTARA, PROVINSI BENGKULU","authors":"Zamdial Zamdial, Dede Hartono, Ari Anggoro, Ali Muqsit","doi":"10.31186/jenggano.4.2.160-173","DOIUrl":"https://doi.org/10.31186/jenggano.4.2.160-173","url":null,"abstract":"Pulau Enggano dengan luas ± 400,6 km2 (± 40.600 hektar) adalah sebuah pulau kecil terluar di Provinsi Bengkulu yang terletak di Perairan Barat Sumatera, dan termasuk wilayah Kabupaten Bengkulu Utara. Salah satu sumberdaya alam yang dominan di Pulau Enggano adalah ekosistem terumbu karang yang memberikan manfaat begitu besar bagi kehidupan masyarakat di Pulau Enggano. Penelitian ini bertujuan untuk menghitung valuasi ekonomi ekosistem terumbu karang di Pulau Enggano, untuk kepentingan perencanaan pemanfaatan dan pengelolaan secara berkelanjutan. Penelitian ini dilakukan dengan Metode Survai. Data parameter kualitas air dikumpulkan dengan pengukuran langsung di lokasi penelitian. Data untuk menghitung nilai keberadaan ekosistem terumbu karang dikumpulkan dengan metode wawancara terhadap 180 orang responden yang dipilih secara purposive sampling. Nilai ekonomi total ekosistem terumbu karang dianalisis dan dihitung berdasarkan nilai manfaat langsung, nilai manfaat tidak langsung, nilai manfaat pilihan dan nilai manfaat warisan. Nilai rata-rata parameter perairan di perairan Pulau Enggano secara berturut-turut adalah suhu (29,660C), salinitas (35,06 ‰), kuat arus (2,13 m/s), kecerahan 5,33 m), Oksigen Terlarut/DO (7,39 mg/l), dan pH (7,13). Nilai parameter perairan menunjukkan kondisi perairan yang masih baik dan belum tercemar sehingga dapat mendukung keberadaan dan pertumbuhan ekosistem terumbu karang di Perairan Pulau Enggano. Luas ekosistem terumbu karang di Pulau Enggano ± 5.097 hektar. Nilai manfaat ekonomi total ekosistem terumbu karang adalah Rp. 176.901.038.387,- per tahun, yang terdiri dari nilai manfaat langsung Rp. 561.327.640,- per tahun; nilai manfaat tidak langsung Rp. 46.342.500.000,- per tahun, nilai manfaat pilihan Rp. 2.516.077.983,- , nilai manfaat keberadaan Rp. 127.425.000.000,- per tahun dan nilai warisan Rp. 56.132.764,- per tahun.ECONOMIC VALUATION OF CORAL REEF IN ENGGANO ISLAND, NORTH BENGKULU REGENCY, BENGKULU PROVINCE. Enggano Island with area of ± 400.6 km2 (± 40,600 hectares) is an the outer  small island in Bengkulu Province that located in the West Coast of Sumatra, and include of North Bengkulu Regency. One of the dominant natural resources in Enggano Island is a coral reef ecosystem that provides enormous benefits to people's lives in Enggano Island. This study aims to calculate the economic valuation of coral reef ecosystems in Enggano Island, for stake of planning, utilization and sustainable management. This research is done by Survey Method. The data of water quality parameter was collected by direct measurement at the study location. Data to calculate the existence value of coral reef ecosystem was collected by interview method to 180 respondents that chosen by purposive sampling. The total economic value of coral reef ecosystems is analyzed and calculated based on the direct value, indirect value, option value and bequest value. The average values of water parameters in Enggano Island waters are (29,66 oC), sal","PeriodicalId":33425,"journal":{"name":"Jurnal Enggano","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77797579","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}

{"title":"MOTIVASI DAN PERSEPSI MASYARAKAT PULAU ENGGANO TERHADAP PENDIDIKAN","authors":"Abdul Rahman Singkam, Syaiful Rochman, Fitra Youpika","doi":"10.31186/jenggano.4.2.115-127","DOIUrl":"https://doi.org/10.31186/jenggano.4.2.115-127","url":null,"abstract":"This research aims to analyse the impact of motivation and perception of the society on the quality of education in Enggano island: one of the 111 outermost islands in Indonesia. Despite lacking of supporting facilities is still a main problem of education in Enggano, non-physics (motivation and perception) data are expected to provide alternative solution. Data in this research was collected by using semi-open questionnares to all qualified respondents. 579 quetionnaires in total were fulfilled by six categories of respondents: the students of elementary-, junior- and senior high school, teachers, parents, and the village leaders. Our results show that the motivation of students in Enggano is sufficiently high: 78 out of 100, while the perception of parents and teachers to education is on the medium level: 65 out of 100. The village leaders have graded the quality of education in Enggano on 5.6+0.17 out of 10. Besides of the medium level on perception, a low integrity among the teachers also contributed to the backwardness of eduaction in Enggano.MOTIVATION AND PERCEPTION OF ENGGANO ISLAND COMMUNITIES ON EDUCATION. This research aims to analyse the impact of motivation and perception of the society on the quality of education in Enggano island: one of the 111 outermost islands in Indonesia. Despite lacking of supporting facilities is still a main problem of education in Enggano, non-physics (motivation and perception) data are expected to provide alternative solution. Data in this research was collected by using semi-open questionnares to all qualified respondents. 579 quetionnaires in total were fulfilled by six categories of respondents: the students of elementary-, junior- and senior high school, teachers, parents, and the village leaders. Our results show that the motivation of students in Enggano is sufficiently high: 78 out of 100, while the perception of parents and teachers to education is on the medium level: 65 out of 100. The village leaders have graded the quality of education in Enggano on 5.6+0.17 out of 10. Besides of the medium level on perception, a low integrity among the teachers also contributed to the backwardness of eduaction in Enggano.","PeriodicalId":33425,"journal":{"name":"Jurnal Enggano","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81426075","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}

{"title":"ASPEK REPRODUKSI DAN UMUR IKAN EKOR KUNING (Caesio cuning) YANG DI DARATKAN DI PELABUHAN PERIKANAN NUSANTARA SUNGAILIAT KABUPATEN BANGKA","authors":"Nirmala Sari, Okto Supratman, E. Utami","doi":"10.31186/jenggano.4.2.193-207","DOIUrl":"https://doi.org/10.31186/jenggano.4.2.193-207","url":null,"abstract":"Ikan ekor kuning (Caesio cuning) salah satu jenis ikan karang dari famili Caesionidae, yang menjadi target penangkapan dengan bubu di Pelabuhan Perikanan Nusantara Sungailiat. Ikan ekor kuning memiliki nilai ekonomis penting. Informasi tentang aspek reproduksi ikan ekor kuning (Caesio cuning) diperlukan untuk pengelolaan yang berkelanjutan. Penelitian ini bertujuan untuk mengetahui aspek reproduksi ikan ekor kuning pada bulan Januari sampai Maret yang meliputi Rasio Kelamin (sex ratio), Tingkat Kematangan Gonad (TKG), Indeks Kematangan Gonad (IKG), Fekunditas, dan menganalisis umur ikan. Pengambilan sampel dilakukan pada bulan Januari sampai Maret 2019 di Pelabuhan Perikanan Nusantara Sungailiat dengan menggunakan metode random sampling. Hasil penelitian selama tiga bulan ini menunjukkan bahwa nilai rasio kelamin ikan ekor kuning jantan dan betina yaitu 1:1,032 yang berada pada tingkat kematangan I sampai dengan tingkat kematangan gonad IV. Nilai IKG ikan ekor kuning jantan berkisar antara 0,014% - 4,712% dan untuk betina antara 0,014% - 7,784%. Fekunditas ikan ekor kuning betina berkisar antara 5.523 – 49.987 butir dan memiliki umur 1 tahun dan 2 tahun, dimana panjang tubuh ikan sangat mempengaruhi umur ikan.REPRODUCTIVE ASPECTS AND AGE OF YELLOW-TAILED FISH (Caesio Cuning) LANDED AT SUNGAILIAT ARCHIPELAGO FISHING PORT IN BANGKA REGENCY. Reproductive aspects of yellow-tailed fish which are landed in the Pelabuhan Perikanan Nusantara Sungailiat in Bangka Regency. Yellow-tailed fish (Caesio cuning) is one type of reef fish from the Caesionidae family, which is the target of catching fish at the Pelabuhan Perikanan Nusantara Sungailiat. Yellow tail fish has important economic value. Information about the reproductive aspects of yellow tail fish (Caesio cuning) is  needed for sustainable management. This study aims to determine the reproductive aspects of yellow tailed fish from January to March which include sex ratio, gonad maturity level, gonad somatic index, fecundity, and analyze the age of fish. Sampling was carried out from January to March 2019 at the Pelabuhan Perikanan Nusantara Sungailiat used the random sampling method. The results of this three-month study showed that the sex ratio of yellow-tailed fish male and female were 1: 1,032 which at the level of maturity I to the level of gonad maturity IV. The value of GSI male yellow-tailed fish ranges from 0.014% - 4.712% and females between 0.014% - 7.784%. The fecundity of female yellow-tailed fish ranges from 5,523 - 49,987 grains and yellow-tailed fish has age 1 year and 2 years, where the body length of fish greatly affects the age of fish.","PeriodicalId":33425,"journal":{"name":"Jurnal Enggano","volume":"431 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77035910","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}

{"title":"KAJIAN KESESUAIAN, DAYA DUKUNG, DAN AKTIVITAS EKOWISATA DI KAWASAN MANGROVE DESA TUADA KECAMATAN JAILOLO KABUPATEN HALMAHERA BARAT","authors":"Salim Abubakar, Riyadi Subur, Darmawaty Darmawaty, Nebuchadnezzar Akbar, Irmalita Tahir","doi":"10.31186/jenggano.4.2.222-242","DOIUrl":"https://doi.org/10.31186/jenggano.4.2.222-242","url":null,"abstract":"Pengembangan wisata mangrove memerlukan kesesuaian sumberdaya dan lingkungan yang sesuai dengan yang disyaratkan. Kesesuaian karakteristik sumber daya dan lingkungan untuk pengembangan wisata dilihat dari aspek keindahan alam, keamanan dan keterlindungan kawasan, keanekaragaman biota, keunikan sumber daya dan aksesibilitas. Tujuan penelitian yaitu menghitung indeks kesesuaian kawasan untuk pengembangan ekowisata mangrove, menghitung daya dukung kawasan dan mengidentifikasi jenis kegiatan wisata yang dapat dilakukan dalam kawasan mangrove. Metode yang digunakan adalah metode survei yaitu pengukuran secara langsung untuk mengetahui kondisi biofisik mangrove. Hasil analisis Indeks Kesesuaian Wisata (IKW) baik stasiun i, stasiun 2 dan stasiun 3 maupun secara keseluruhan menunjukkan kawasan hutan mangrove di Desa Tuada Kecamatan Jailolo berada pada kategori S1 (sangat sesuai). Jumlah Daya Dukung Kawasan (DDK) untuk kegiatan tracking adalah 34 orang/hari, kegiatan piknik  sebanyak 56 orang/hari dan kegiatan camping sebanyak 13 orang. Total daya dukung kawasan wisata mangrove Desa Tuada adalah 102 orang/hari. Aktivitas kegiatan ekowisata mangrove Desa Tuada setiap hari dibuka mulai jam 06.00 – 18.00 WIT. Namun kunjungan wisata lebih banyak pada hari sabtu dan minggu. Tenaga kerja merupakan masyarakat lokal Desa Tuada. Aktivitas wisata yang direkomendasikan terdiri dari Tracking, berperahu, memancing, bird watching dan berenang (10%). Sedangkan fasilitasi wisata yang direkomendasikan berupa Waserda, penginapan, tempat ibadah dan tempat sampah.STUDY OF CONFORMITY, CARRIYING CAPACITY, AND ECOTOURISM ACTIVITIES IN THE MANGROVE AREA OF TUADA VILLAGE, JAILOLO DISTRICT, WEST HALMAHERA REGENCY. Development of mangrove tourism requires the suitability of resources and environment that are in accordance with what is required. Conformity of resource and environmental characteristics for tourism development is seen from aspects of natural beauty, regional security and protection, biota diversity, uniqueness of resources and accessibility. The research objective is to calculate the regional suitability index for the development of mangrove ecotourism, calculate the carrying capacity of the area and identify the types of tourism activities that can be carried out in the mangrove area. The method used is the survey method that is direct measurement to determine the mangrove biophysical conditions. The results of the Tourism Conformity Index (IKW) analysis of Station I, Station 2 and Station 3 as well as overall show that the mangrove forest in Tuada Village, Jailolo District is in the S1 category (very suitable). The amount of Regional Carrying Capacity (DDK) for tracking activities is 34 people / day, picnic activities as many as 56 people / day and camping activities as many as 13 people. The total carrying capacity of the mangrove tourism area in Tuada Village is 102 people / day. Mangrove ecotourism activities in Tuada Village are open daily from 06.00 - 18.00 WIT","PeriodicalId":33425,"journal":{"name":"Jurnal Enggano","volume":"157 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79936988","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}

{"title":"TINGKAT HERBIVORI DAUN Avicennia marina (FORSSK.) VIERH DAN Rhizophora mucronata DI VEGETASI MANGROVE – TIMBULSLOKO, DEMAK","authors":"Eldita Amalia, Rini Pramesti, R. Pribadi, W. A. Setyati","doi":"10.31186/jenggano.4.2.128-135","DOIUrl":"https://doi.org/10.31186/jenggano.4.2.128-135","url":null,"abstract":"Mangrove merupakan varietas komunitas pantai tropik dan subtropik  yang mampu beradaptasi dengan salinitas tertentu. Jenis Avicennia marina dan Rhizophora mucronata merupakan tegakan alami dan hasil rehabilitasi. Kegiatan konservasi di lokasi ini belum dikelola baik sehingga struktur dan komposisi bervariasi. Hal ini dapat diatasi yang salah satunya dengan herbivori sebagai parameter tingkat kerusakan ekosistem mangrove. Daun merupakan salah satu bagian tumbuhan yang mengalami perubahan bentuk karena pemangsaan.  Tujuan penelitian ini untuk mengetahui tingkat herbivori daun A.marina dan R. mucronata berdasarkan perbedaan spesies, umur daun dan ketinggian pohon. Metode deskriptif digunakan dalam penelitin ini dan penentuan lokasi pengambilan sampel dengan metode purposive sampling. Sampel daun diambil dari tiga kategori ketinggian yang berbeda yaitu <1 m, >1-3 m, >3-5 m, masing-masing sebanyak 10 ulangan (pohon) untuk setiap kategori. Daun dipisahkan berdasarkan umur daun (tua atau muda) dan kondisi daun (utuh atau rusak) dan total daun diambil sebanyak 10%. Hasil penelitian menunjukan nilai rerata pada setiap jenis, umur daun dan ketinggian pohon diperoleh tingkat herbivori A. marina yaitu 4,66%  (0,16% - 8,93%) sampai 11,59% (2,14% - 21,97%) sedangkan R. mucronata yaitu 5,23% (0,31% - 9,94%) sampai 12,44% (3,50% - 23,81%).HERBIVORY LEVEL OF MANGROVE LEAVES Avicennia marina (FORSSK.) VIERH AND Rhizophora mucronata IN MANGROVE VEGETATION - TIMBULSLOKO, DEMAK. Mangroves are variety of tropical and subtropical coastal communities that adapt to certain salinity. Avicennia marina and Rhizophora mucronata were found in location. Conservation activities were not managed so the structure and composition varies. This can be overcome one of them with herbivory as a parameter of the level damage to mangrove ecosystems. The leaves are one part of the plant that changes shape due to predation. The purpose of this study was to determine herbivory level of A.marina and R. mucronata leaves based on differences in species, leaf of age and tree of height. Descriptive method is used in this study and the determination of the location sampling with the purposive sampling method. Leaf samples were taken from three different height categories namely <1 m,> 1-3 m,> 3-5 m, each with 10 replications (trees) for each category. The leaves are separated based on the age of the leaves (old or young) and the condition of the leaves (whole or damaged) total leaves taken as much as 10%. The results showed the average value of each species, leaf age and height of the tree obtained A. marina herbivory level of 4.66% range (0.16% - 8.93%) to 11.59% range (2.14% - 21.97%) while R. mucronata is 5.23% range (0.31% - 9.94%) to 12.44% range (3.50% - 23.81%).","PeriodicalId":33425,"journal":{"name":"Jurnal Enggano","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77763038","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}

{"title":"KOMPOSISI JENIS KEONG POTAMIDIDAE DI EKOSISTEM MANGROVE KAWASAN PERTAMBAKAN PROBOLINGGO JAWA TIMUR","authors":"Ucu Yanu Arbi, H. A. Cappenberg, Yaya Ihya Ulumuddin, Mujizat Kawaroe, R. M. Marwoto","doi":"10.31186/jenggano.4.2.208-221","DOIUrl":"https://doi.org/10.31186/jenggano.4.2.208-221","url":null,"abstract":"Terletak di sekitar Selat Madura, Kabupaten dan Kota Probolinggo merupakan habitat dari vegetasi mangrove, tetapi keberadaan hutan mangrove di lokasi ini sebagian besar telah dikonversi menjadi areal pertambakan. Vegetasi mangrove yang tersisa tumbuh hanya di pematang tambak dan di sekitar bagian pantai. Potamididae merupakan satu-satunya famili dari gastropoda dimana semua anggotanya hanya dapat ditemukan berasosiasi dengan vegetasi mangrove. Tujuan dari penelitian ini adalah untuk mengetahui komposisi spesies keong Potamididae di areal pertambakan Probolinggo. Penelitian dilakukan pada bulan Februari dan April 2013 menggunakan metode Purposive Random Sampling di tujuh stasiun penelitian. Identifikasi spesies keong Potamididae dilakukan terutama berdasarkan karakter morfologi cangkang. Hasil penelitian menunjukkan bahwa delapan spesies keong Famili Potamididae ditemukan pada lokasi ini. Keberadaan vegetasi mangrove, jarak terdekat dengan garis pantai, suhu, salinitas dan pola arus serta pasang surut air laut dicatat sebagai faktor pendukung pertumbuhan dan perkembangan keong di lokasi penelitian. Hasil dari penelitian ini diharapkan dapat membuka peluang penelitian selanjutnya untuk mengetahui peran dan pengaruh keong Potamididae bagi kesehatan ekosistem habitat mangrove di area pertambakan.COMPOSITION OF POTAMIDID SNAILS IN THE MANGROVE ECOSYSTEM OF PROBOLINGGO POND AREA, EAST JAVA. Located around Madura Strait, Probolinggo City and Regency is a home for mangrove vegetation, but the mangrove forest in this are mostly has been converted into aquaculture ponds. The mangrove relic grows in the pond embankment and the narrow strip along the seaside. Potamididae is the only family of gastropods in which all members can only found associated with mangrove vegetation. The aim of this research was to determine species composition of potamidid snails in the pond environment of Probolinggo. The research was conducted in February and April 2013 using Purposive Random Sampling method in seven sampling stations. The species identification of the snails was based primarily on morphological shell characters. The results showed that eight species of Family Potamididae were found at the sites. The presence of mangrove trees, the distance to nearest coastline, temperature, salinity, and the pattern of ocean current and tide seemed to support the snails to grow and thrive in the study sites. The results of this study are expected to open up opportunities for further research to determine the role and influence of potamidid snails on the ecosystem health of mangrove habitat in the pond environment.","PeriodicalId":33425,"journal":{"name":"Jurnal Enggano","volume":"106 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85753899","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}

{"title":"PERANAN DAN PEMANFAATAN MIKROALGA Tetraselmis chuii SEBAGAI BIOETANOL","authors":"Bertoka Fajar Sp Negara, Nining Nursalim, N. E. Herliany, Person Pesona Renta, Dewi Purnama, M. A. F. Utami","doi":"10.31186/jenggano.4.2.136-147","DOIUrl":"https://doi.org/10.31186/jenggano.4.2.136-147","url":null,"abstract":"Bahan bakar fosil merupakan bahan bakar yang berasal dari pelapukan sisa mahluk hidup. Bahan bakar fosil bersifat tidak terbaharukan, maka pencarian bahan bakar alternatif yang terbarukan perlu dilakukan salah satunya bioetanol. Tetraselmis chuii dapat dijadikan bahan baku pembuatan bioetanol. Tujuan dari penelitian ini adalah untuk mengetahui volume bioetanol yang dihasilkan dari Fermentasi Tetraselmis chuii. Kultur Tetraselmis chuii selama 6 hari. Hidrolisis dilakukan dengan menambahkan H2SO4 0,2 M pada suhu 121oC dengan tekanan 1 atm selama 30 menit, Fermentasi dengan Saccharomyces cereviseae selama 5 hari. Penelitian ini menghasilkan gula reduksi Tetraselmis chuii dengan kadar gula 4% dan hasil fermentasi Tetraselmis chuii menghasilkan 12 ml etanol dengan konsentrasi 1%.THE ROLE AND UTILIZATION OF MICROALGAE Tetraselmis chuii AS BIOETHANOL. Fossil fuels are the fuel produced from the weathering of living things. Fossil fuels are non-renewable, therefore the research of renewable energy is needed. Bioethanol could be good solution. Tetraselmis chuii can be used as the raw material for bioethanol. The purpose of this study was to determine the volume of ethanol through fermentation of Tetraselmis chuii. Tetraselmis chuii was cultured for 6 days. The hydrolysis used 0.2 M H2SO4 at 1210C and pressure of 1 atm for 30 minutes, and the fermentation used Sacscharomyces cereviseae for 5 days. The results showed that Tetraselmis chuii produced 4% sugar and The fermentation produced 1% bioethanol with volume was 12 ml.","PeriodicalId":33425,"journal":{"name":"Jurnal Enggano","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88601184","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}

{"title":"STRUKTUR KOMUNITAS LAMUN DI MALANG RAPAT, BINTAN","authors":"Wahyu Adi, A. Nugraha, Y. H. Dasmasela, Agus Ramli, C. Sondak, Nurul Dhewani Mirah Sjafrie","doi":"10.31186/jenggano.4.2.148-159","DOIUrl":"https://doi.org/10.31186/jenggano.4.2.148-159","url":null,"abstract":"Padang lamun menyediakan banyak manfaat. Diperlukan penilaian tutupan lamun dan distribusi spasial spesies lamun, untuk memastikan manfaat dari padang lamun tetap ada. Penelitian ini dilakukan dengan metode kuadran disepanjang line transect, dan analisis data dilakukan untuk dapat menyajikan informasi tentang titik koordinat transek garis, persen tutupan lamun, persen tutupan spesies lamun, jenis substrat (pasir, lumpur dan pecahan karang), jumlah spesies Enhallus acoroides (tegakan/m2) dan distribusi spasial spesies lamun. Hasil penelitian menunjukkan kondisi padang lamun di wilayah studi sebagai kategori tutupan padat. Spesies lamun Thalassia hemprichii (Th) dan Enhalus acoroides (Ea) adalah spesies dominan dan menyebar ke seluruh wilayah penelitian.COMMUNITY STRUCTURE OF SEAGRASS IN MALANG RAPAT, BINTAN. Seagrass beds provide many benefits. Assessment of seagrass cover and spatial distribution of seagrass species is needed, to ensure the benefits of seagrass beds remain. The study was conducted using the quadratic method on the line transect, and the analysis was carried out to be able to present information about line transect coordinate points, percent cover of seagrass, percent cover of seagrass species, substrate type (sand, mud and rubble), number of species of Enhallus acoroides (shoot/m2) and spatial distribution of seagrass species. The results showed the condition of seagrass beds in the study area as a category of solid cover. Seagrass species Thalassia hemprichii (Th) and Enhalus acoroides (Ea) are dominant species and spread throughout the study area.","PeriodicalId":33425,"journal":{"name":"Jurnal Enggano","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83302226","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}