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JURNAL ENGGANO
Published by Universitas Bengkulu
ISSN : 26155958     EISSN : 25275186     DOI : -
Core Subject : Education,
Jurnal Enggano is published twice a year, in April and September, and contains a mixture of academic articles and reviews on all aspects of marine science and fisheries.
Arjuna Subject : -
Articles 9 Documents
Search results for , issue "Vol 4, No 2" : 9 Documents clear
PERANAN DAN PEMANFAATAN MIKROALGA Tetraselmis chuii SEBAGAI BIOETANOL Negara, Bertoka Fajar SP; Nursalim, Nining; Herliany, Nurlaila Ervina; Renta, Person Pesona; Purnama, Dewi; Utami, Maya Angraini Fajar
JURNAL ENGGANO Vol 4, No 2
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (133.374 KB) | DOI: 10.31186/jenggano.4.2.136-147

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.
KOMPOSISI JENIS KEONG POTAMIDIDAE DI EKOSISTEM MANGROVE KAWASAN PERTAMBAKAN PROBOLINGGO JAWA TIMUR Arbi, Ucu Yanu; Cappenberg, Hendrik Alexander William; Ulumuddin, Yaya Ihya; Kawaroe, Mujizat; Marwoto, Ristiyanti Marsetyowati
JURNAL ENGGANO Vol 4, No 2
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (679.192 KB) | DOI: 10.31186/jenggano.4.2.208-221

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.
STRUKTUR KOMUNITAS LAMUN DI MALANG RAPAT, BINTAN Adi, Wahyu; Nugraha, Aditya Hikmat; Dasmasela, Yehiel Hendry; Ramli, Agus; Sondak, Calvyn Fredrik Aldus; Sjafrie, Nurul Dhewani Mirah
JURNAL ENGGANO Vol 4, No 2
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1068.895 KB) | DOI: 10.31186/jenggano.4.2.148-159

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.
KAJIAN KESESUAIAN, DAYA DUKUNG, DAN AKTIVITAS EKOWISATA DI KAWASAN MANGROVE DESA TUADA KECAMATAN JAILOLO KABUPATEN HALMAHERA BARAT Abubakar, Salim; Subur, Riyadi; Darmawaty, Darmawaty; Akbar, Nebuchadnezzar; Tahir, Irmalita
JURNAL ENGGANO Vol 4, No 2
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (342.546 KB) | DOI: 10.31186/jenggano.4.2.222-242

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. But more tourist visits on Saturdays and Sundays. The workforce is the local community of Tuada Village. Recommended tourism activities consist of Tracking, boating, fishing, bird watching and swimming (10%). While the recommended tourism facilitation is a regional legislative body, lodging, place of worship and trash can.
VALUASI EKONOMI EKOSISTEM TERUMBU KARANG DI PULAU ENGGANO, KABUPATEN BENGKULU UTARA, PROVINSI BENGKULU Zamdial, Zamdial; Hartono, Dede; Anggoro, Ari; Muqsit, Ali
JURNAL ENGGANO Vol 4, No 2
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (180.736 KB) | DOI: 10.31186/jenggano.4.2.160-173

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), salinity (35.06 ?), current speed (2.13 m/s), water brightness (5.33 m), Oxygen Dissolved (7.39 mg / l), and pH (7.13). The parameters of waters shows the condition of the waters are still good and not contaminated so it can support the existence and growth of coral reef ecosystems in Enggano Island waters. The wide of coral reef ecosystem in Enggano  Island ± 5,097 hectares. The total economic value of coral reef ecosystem is Rp.176,901,038,387,- per year, that consisting of direct value Rp. 561,327,640,- per year; indirect value Rp. 46,342,500,000, - per year, the option value Rp. 2,516,077,983, - per year, the existence value Rp. 127.425.000.000,- and the bequest  value Rp. 56,132,764,- per year.
MOTIVASI DAN PERSEPSI MASYARAKAT PULAU ENGGANO TERHADAP PENDIDIKAN Singkam, Abdul Rahman; Rochman, Syaiful; Youpika, Fitra
JURNAL ENGGANO Vol 4, No 2
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (528.706 KB) | DOI: 10.31186/jenggano.4.2.115-127

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.
DETEKSI AWAL HABITAT PERAIRAN LAUT DANGKAL MENGGUNAKAN TEKNIK OPTIMUM INDEX FACTOR PADA CITRA SPOT 7 DAN LANDSAT 8 Purwanto, Anang Dwi; Setiawan, Kuncoro Teguh
JURNAL ENGGANO Vol 4, No 2
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (934.567 KB) | DOI: 10.31186/jenggano.4.2.174-192

Abstract

Informasi keberadaan habitat perairan laut dangkal semakin dibutuhkan terutama dalam kegiatan pelestarian lingkungan dan monitoring di wilayah pesisir. Komponen penyusun ekosistem habitat dasar perairan laut dangkal di antaranya terumbu karang dan lamun dimana lokasi keberadaan obyek habitat ini cenderung berdekatan. Dalam interpretasi ekosistem habitat dasar perairan laut dangkal terkendala oleh lokasi keberadaan ekosistem yang berasosiasi dengan obyek lainnya. Tujuan penelitian ini adalah menentukan kombinasi komposit kanal terbaik dalam mengidentifikasi obyek habitat dasar perairan laut dangkal di Pantai Pemuteran, Bali. Data citra satelit yang digunakan dalam penelitian ini adalah citra SPOT 7 akuisisi tanggal 11 April 2018 dan citra Landsat 8 akuisisi tanggal 14 April 2018, sedangkan data terkait informasi sebaran habitat dasar perairan laut dangkal diperoleh berdasarkan hasil survei lapangan yang telah dilakukan pada tanggal 7-13 April 2018 di Pantai Pemuteran, Bali. Data citra satelit diperoleh dari Pusat Teknologi dan Data LAPAN. Untuk menentukan kombinasi dari 3 (tiga) kanal terbaik dalam interpretasi habitat dasar perairan laut dangkal digunakan metode Optimum Index Factor (OIF) dimana metode ini menggunakan nilai standar deviasi dan koefisien korelasi dari kombinasi 3 (tiga) kanal citra yang digunakan. Hasil penelitian menunjukkan kombinasi komposit 2 (hijau), 3 (merah) dan 4 (NIR) mempunyai nilai OIF tertinggi untuk citra SPOT 7, sedangkan kombinasi komposit 2 (biru), 4 (merah) dan 6 (SWIR 1) Mempunyai nilai OIF tertinggi untuk citra Landsat 8. Interpretasi sebaran habitat dasar perairan laut dangkal dapat dilakukan secara efektif dengan menggunakan citra komposit RGB 423 untuk citra SPOT 7 dan RGB 642 untuk citra Landsat 8.DETECTION OF SHALLOW WATER HABITATS USING OPTIMUM INDEX FACTORS TECHNIQUE ON SPOT 7 AND LANDSAT 8 IMAGERY. Information of the existence of the shallow water habitat is required especially in environmental conservation and monitoring of activities in coastal areas. The component of the shallow water habitat including coral reefs and seagrass where the location of the existence of these relatively close together. Interpretation of the shallow water habitat is constrained by the location of ecosystem associated with other objects. The aim of study is to determine the best combination of band composites in identifying the shallow water habitat in Pemuteran Beach, Bali. The study used SPOT 7 imagery (acquisition on April 11, 2018) and Landsat 8 imagery (acquisition on April 14, 2018). The data of the shallow water habitat based on the result of field survey was conducted on 7-13 April 2018 at Pemuteran Beach, Bali. Image data obtained from Remote Sensing Technology and Data Center of LAPAN. Determination of combination of 3 (three) bands the shallow water habitat using Optimum Index Factor (OIF) method where this method used standard deviation value and correlation coefficient from combination of 3 (three) bands. The results show the composite combinations of band 2 (green), band 3 (red) and band 4 (NIR) have the highest OIF values for SPOT 7 image, while the composite combinations of band 2 (blue), band 4 (red) and band 6 (SWIR 1) have the highest OIF values for Landsat 8 image. Interpretation of distribution of shallow water habitat can be done effectively using RGB 423 composite image (SPOT 7) and RGB 642 composite image (Landsat 8).
TINGKAT HERBIVORI DAUN Avicennia marina (FORSSK.) VIERH DAN Rhizophora mucronata DI VEGETASI MANGROVE – TIMBULSLOKO, DEMAK Amalia, Eldita; Pramesti, Rini; Pribadi, Rudhi; Setyati, Wilis Ari
JURNAL ENGGANO Vol 4, No 2
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (103.659 KB) | DOI: 10.31186/jenggano.4.2.128-135

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%).
ASPEK REPRODUKSI DAN UMUR IKAN EKOR KUNING (Caesio cuning) YANG DI DARATKAN DI PELABUHAN PERIKANAN NUSANTARA SUNGAILIAT KABUPATEN BANGKA Sari, Nirmala; Supratman, Okto; Utami, Eva
JURNAL ENGGANO Vol 4, No 2
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (619.774 KB) | DOI: 10.31186/jenggano.4.2.193-207

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.

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