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First maturity assessment and allometric growth of skipjack tuna, Katsuwonus pelamis (Linnaeus, 1758), landed at Ternate Island Susanto, Adi Noman; Lumingas, Lawrence J.L
AQUATIC SCIENCE & MANAGEMENT Vol 2, No 2 (2014): Oktober
Publisher : Graduate Program of Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.2.2.2014.12396

Title (Bahasa Indonesia):Â Pendugaan pertama matang kelamin dan pertumbuhan alometri ikan cakalang, Katsuwonus pelamis (Linnaeus, 1758), yang didaratkan di Pulau TernateÂ Skipjack tuna, Katsuwonus pelamis (Linnaeus, 1758), is a very important species for Indonesian fisheries.Â A total of 462 specimens (254 males and 208 females) collected from fish landings in Ternate Island from November 2013 to April 2014 were used to estimate length at first sexual maturity, length-weight relationship, and length-head circumference relationship. The length at first sexual maturity (FL50) was 489.68 mm. The length-weight relationship equations wereÂ W = 0.0001*FL2.7232 for males and W = 0.0002*FL2.6595 for females, respectively. Studentâ€™s t-test indicated significant deviation of â€˜bâ€™ from â€˜3â€™ towards negative allometric growth (p< 0.05).Â The length-head circumference relationship equations were HC = 0.5453*FL1.0263for males and HC = 0.6519*FL0.9985for females, respectively. Studentâ€™s t-test indicated no significant deviation of â€˜bâ€™ from â€˜1â€™ towards isometric growth (p> 0.05).Â Analysis of covariance showed that there was no significant difference between sexes (p> 0.05) for both relationships. Hence, a common length-weight relationship and a common length-head circumference relationship can be derived using pooled data of both sexes.Â Ikan cakalang, Katsuwonus pelamis (Linnaeus, 1758) merupakanÂ spesies yang sangat penting untuk perikanan Indonesia.Â Sejumlah 462 spesimen (254 jantan dan 208 betina) ikan cakalang yang diperoleh dari ikan yang didaratkan di Pulau Ternate, selama periode November 2013 sampai April 2014 telah digunakan untuk menduga panjang matang kelamin pertama, hubungan panjang-berat, dan hubungan panjang-keliling lingkar kepala. Panjang pada saat matang kelamin pertama (PC50) adalah Â 489,68 mm. Persamaan hubungan panjang-berat diperoleh BT = 0,0001*PC2,7232 untuk jantan dan BT = 0,0002*PC2,6595 untuk betina. Hasil uji-t Student menunjukkan penyimpangan yang nyata â€˜bâ€™ dari â€˜3â€™ cenderung ke arah pertumbuhan alometrik negatif (p < 0,05).Â Â Persamaan hubungan panjang-keliling lingkar kepala diperoleh LK = 0,5453*PC1,0263 untuk jantan dan LK = 0,6519*PC0,9985 untuk betina. Hasil uji-t Student menunjukkan deviasi yang tidak nyata nilai â€˜bâ€™ dari â€˜1â€™ yang cenderung ke arah pertumbuhan isometrik (p > 0,05).Â Â Analisis kovarians menunjukkan bahwa tidak terdapat perbedaan yang nyata antara jantan dan betina (p > 0,05) untuk kedua hubungan tersebut di atas. Oleh karena itu, suatu hubungan panjang-berat umum dan suatu hubungan panjang-lingkar kepala umum dapat dibuat dengan menggunakan data gabungan kedua jenis kelamin.

Composition and Condition of Mangrove Forest in Tarnana Island Subdistrict South Jailolo, North Maluku Province Susanto, Adi Noman; Sabar, Mesrawaty; Abubakar, Salim; Sunarti, Sunarti; Abubakar, Yuyun
Agrikan: Jurnal Agribisnis Perikanan Vol 14, No 1 (2021)
Publisher : Sekolah Tinggi Ilmu Pertanian Wuna

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29239/j.agrikan.14.1.99-107

The mangrove ecosystem is one of the main ecosystems in the coastal area which is very productive, but is very vulnerable to changes or external influences. As a vulnerable ecosystem, mangrove ecosystem management has to concern the integration of the community's ecological, economic and socio-cultural aspects so that optimal and sustainable management is achieved. The research objectives were to know the composition of mangrove species, to determine the structure of the mangrove forest community (species diversity, species dominance, uniformity, species density, species cover) and to determine the condition of mangrove forests on Tarnana Island, Jailolo Selatan District. This research was conducted on Tarnana Island, Jailolo Selatan District, and West Halmahera Regency in January - February 2021. The sampling method was carried out using the spot check method. Sampling was carried out at the lowest tide by using 5 line transects and each line transect placed 5 plots. Data analysis included species diversity, species dominance, uniformity, species density and species cover. The composition of mangrove species on Tarnana Island was obtained as many as 8 species, namely Rhizophora apiculata, R. stylosa, Bruguirea gymnorrhiza, Ceriops decandra, Ceriops tagal, Sonneratia alba, Xylocarpus granatum and Avicennia alba. The structure of the mangrove community has moderate species diversity, no dominant species and moderate uniformity. The condition of the mangrove forest on Tarnana Island is in the damaged category with rare density.

Pengelolaan Sampah Plastik menjadi Ecobrick pada Ibu Rumah Tangga di Kelurahan Kalumata Kota Ternate Fajria Dewi Salim; Yuyun Abubakar; Sri Endah Widiyanti; Salim Abubakar; Mesrawaty Sabar; Rusmawati La benua; Masykhur Abd Kadir; Adi Noman Susanto; Ariyati A Fadel
Jurnal Pengabdian Magister Pendidikan IPA Vol 4 No 4 (2021)
Publisher : Universitas Mataram

Berbagai peralatan kebutuhan rumah tangga terbuat dari plastik. Permasalahan utama limbah plastik sangat sulit terurai. Ironisnya, penggunaannya di masyarakat menyisakan persoalan sampah plastik yang dapat merusak ekosistem pantai, pesisir dan laut. Ecobrick adalah salah satu usaha kreatif bagi penanganan sampah plastik. Fungsinya bukan untuk menghancurkan sampah plastik, melainkan untuk memperpanjang usia plastik-plastik tersebut dan mengolahnya menjadi sesuatu yang berguna, yang bisa dipergunakan bagi kepentingan manusia pada umumnya. Pembuatan ecobrick masih belum begitu populer di kalangan masyarakat Kota Ternate. Kegiatan pengabdian kepada masyarakat untuk ibu rumah tangga di kelurahan Kalumat bertujuan untuk mengedukasi bagaimana mengelola sampah plastik secara baik dan efektif dengan membuat ecobrick. Metode yang digunakan dalam kegiatan ini yaitu metode partisipatif. Hasil yang diperoleh dari kegiatan ini berupa ecobrick dan kursi yang terbuat dari ecobrick. Kegiatan pelatihan ini mampu memberikan pemahaman kepada mitra terkait mengolah sampah plastik rumah tangganya. Dampak lainnya, adanya keberlanjutan yakni mitra berkomitmen dan sudah mulai memilih dan memilah sampah rumah tangga sebelum dibuang ke TPS, dan membuat ecobrick di rumah masing-masing.

STATUS KEBERLANJUTAN PERIKANAN BAGAN PERAHU BERBASIS BIO-EKONOMI DI DESA TONIKU KABUPATEN HALMAHERA BARAT Irwan Abdu Kadir; Adi Noman Susanto; Amirul Karman; Iinpuspita Ode Ane
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 11 No. 1 (2019): Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

ABSTRAKNelayan di Desa Toniku Kabupaten Halmahera Barat, awalnya menggunakan bagan perahu untuk menangkap ikan teri Stolephorus sp. sebagai umpan perikanan pole and line, akan tetapi pada saat ini banyak tertangkap selain teri yaitu juvenil dan larva ikan, ini permasalahan yang perlu dikaji komposisi tangkapan dari bagan perahu. Tujuan penelitian adalah menganalisis komposisi tangkapan, by-cacth, discard, dan aspek ekonomi. Penelitian dilaksanakan di perairan desa Toniku Kabupaten Halmahera Barat, dari tanggal 1 sampai 9 Juni 2018. Metode penelitian adalah metode survei. Obyek penelitian yaitu ikan hasil tangkapan bagan perahu. Hasil penelitian menunjukkan bahwa tangkapan bagan perahu didominasi oleh ikan target tangkap, yaitu; ikan teri (Stolephorus sp) sebesar 86,295%, tangkapan sampingan 12,335% dan tangkapan yang dibuang 1,370%. Tangkapan sampingan didominasi ikan peperek (Leiognatus sp) yaitu 5,575%. Nilai keuntungan Usaha bagan perahu sebesar Rp 93.047.200,00/tahun dengan B/C ratio 2,96. Berdasarkan perbandingan antara target tangkap dengan by-catch dan discard, bagan perahu di Desa Toniku Kabupaten Halmahera Barat dikategorikan alat tangkap ramah lingkungan dan secara finansial menguntungkan dan layak dikembangkan (berkelanjutan). Walaupun discard rate pada bagan perahu rendah namun usaha-usaha untuk meminimumkan tetap perlu dilakukan. Salah satu usaha yang bisa dilakukan adalah sortir, dan hasil tangkapan yang tidak memiliki nilai ekonomis dibuang ke laut dalam keadaan masih hidup. ABSTRACTFishermen in Toniku Village, West Halmahera Regency, initially used a boat lift net to catch anchovy Stolephorus sp. As bait for pole and line fisheries, but at this time many were caught besides anchovy, namely juvenile and fish larvae, these are problems that need to be studied from the boat lift net. The study objective was to analyze the composition of catchs, by-catch, discard, and economic aspects. The research was carried out in the waters of Toniku village, West Halmahera Regency, from June 1 to 9, 2018. The study method is the survey method. The object of the research is the fish catch by the boat lift net. The study results show the catch of the boat's lift net was dominated by main catch, namely; anchovy (Stolephorus sp) is 86.295%, by-catch 12.335% and discard 1.370%. The bay-catch is dominated by peperek (Leiognatus sp) which is 5.575%. Value of the boat lift net business profit of Rp. 93,047,200.00/year with B/C ratio 2.96. Based on the comparison between catch targets and by-catch and discard, the boat lift net in Toniku Village, West Halmahera Regency is categorized as environmentally friendly and financially profitable and feasible (sustainable) fishing gear. Although the discard rate on the boat chart is low, efforts to minimize it still need to be done. One effort that can be done is sorting, and catches that have no economic value are dumped into the sea while still alive.

Pole and Line Fishery Sustainability Status Based on Business Feasibility At the Bacan Coastal Fishing Port, South Halmahera Regency Adi Noman Susanto
Agrikan: Jurnal Agribisnis Perikanan Vol 14, No 2 (2021)
Publisher : Sangia Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29239/j.agrikan.14.2.278-285

The waters of Bacan Island are a fishing ground for skipjack tuna (Katsuwonus pelamis), using pole and line fishing gear with FADs. The pole and line fishery business carried out by fishermen or entrepreneurs at the Bacan coastal fishing port should earn a continuous profit. Therefore, a business feasibility study on the pole and line fishery business is very important given the considerable uncertainty in the business, because this fishery business is highly dependent on the fishing season and natural factors. The research has been carried out in the coastal fishing port of Bacan. Data collection in the field was carried out for 2 weeks, from 6 to 19 May 2021. The study used a descriptive survey method. Data related to investment, operational, maintenance costs, average number of catches/trips, average number of fishing trips and fish prices were obtained through structured interviews using questionnaires with respondents (ship owners, skippers, and crew fishermen). Sampling of respondents was done by purposive sampling. The results showed that financially (profit) and investment (Net B/C, IRR, BEP, and PP) the pole and line fishery business KM Mina Maritim 145 capacity 30 GT and KM Inka Mina 520 capacity 37 GT was feasible to be cultivated throughout the year. Based on business feasibility (financial and investment criteria), the huhate fishery business of the two ships has high sustainability. The pole and line fishery business in the research location has a high sustainability status, therefore it needs attention from the local government, so that the fishery business continues for the sake of increasing regional income and community welfare while still paying attention to the sustainability of the natural resources used.

Hubungan sebaran suhu permukaan laut dan klorofil-a dengan hasil tangkapan ikan cakalang di daerah fishing ground bagian barat pulau Halmahera Supyan Supyan; Adi Noman Susanto; Fikri Rizky Malik
Jurnal Ilmu Kelautan Kepulauan Vol 3, No 1 (2020): Jurnal Ilmu Kelautan Kepulauan
Publisher : Fakultas Perikanan dan Kelautan. Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/jikk.v3i1.1864

Penelitian ini bertujuan untuk mengetahui hubungan sebaran suhu permukaan laut dan klorofil-a terhadap terhadap hasil tangkapan ikan Cakalang (Katsuwonus pelamis) di Perairan Halmahera bagian barat dan selatan. Penelitian akan dilakukan dalam dua tahap. Pengambilan data lapangan dilakukan di perairan Halmahera bagian barat dengan titik koordinat 0°15'57.31"N - 0°49'51.18"N dan 126°30'38.85"E BT-127°5'35.39"E. Data hasil tangkapan yang diamati pada penelitian ini menggunakan data bulan Januari 2016 – Desember 2016 yang tercatat di PPN Dufa-Dufa. Kelimpahan dan produksi ikan cakalang dilakukan perhitungan CPUE sedangkan data SPL dan Klorofil-a diperoleh dari hasil ekstraksi radar indeso dan menjadi inputan pada software Ocean Data View 4 (ODV 4). Hasil penelitian menunjukkan bahwa puncak tangkapan tertinggi di Perairan Halmahera bagian Barat hasil tangkapan tertinggi terjadi pada bulan September dengan CPUE 1,45 dan terendah pada bulan Maret dengan CPUE sebesar 0,6154. Nilai rata-rata bulanan SPL berdasarkan hasil ekstraksi radar indeso setelah diekspor ke spreadsheet menunjukkan bahwa distribusi SPL secara temporal mengalami fluktuasi dengan suhu rata-rata bulanan adalah 29,15C dengan suhu tertinggi terjadi pada bulan Nopember dan terendah pada bulan Juli. Sebaran Klorofil-a di perairan ini mengalami fluktuasi dimana secara temporal, klorofil tertinggi terjadi pada bulan Oktober dan terendah pada bulan Februari 2016. Analisis regresi menunjukkan bahwa sebaran klorofil-a dapat mempengaruhi produktivitas cakalang hingga 52,69% di perairan ini, sisanya dipengaruhi oleh variabel lain di luar penelitian. Suhu permukaan laut hanya dapat berkontribusi sebesar 13% dalam mempengaruhi produksi cakalang di perairan Halmahera bagian barat ini.Kata Kunci : Halmahera , Katsuwonus pelamis, klorofil-a , suhu permukaan laut

Hubungan sebaran suhu permukaan laut dan klorofil-a dengan hasil tangkapan ikan cakalang di daerah fishing ground bagian barat pulau Halmahera Supyan Supyan; Adi Noman Susanto; Fikri Rizky Malik
Jurnal Ilmu Kelautan Kepulauan Vol 3, No 1 (2020): Jurnal Ilmu Kelautan Kepulauan
Publisher : Fakultas Perikanan dan Kelautan. Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/jikk.v3i1.1864

Penelitian ini bertujuan untuk mengetahui hubungan sebaran suhu permukaan laut dan klorofil-a terhadap terhadap hasil tangkapan ikan Cakalang (Katsuwonus pelamis) di Perairan Halmahera bagian barat dan selatan. Penelitian akan dilakukan dalam dua tahap. Pengambilan data lapangan dilakukan di perairan Halmahera bagian barat dengan titik koordinat 0°15'57.31"N - 0°49'51.18"N dan 126°30'38.85"E BT-127°5'35.39"E. Data hasil tangkapan yang diamati pada penelitian ini menggunakan data bulan Januari 2016 – Desember 2016 yang tercatat di PPN Dufa-Dufa. Kelimpahan dan produksi ikan cakalang dilakukan perhitungan CPUE sedangkan data SPL dan Klorofil-a diperoleh dari hasil ekstraksi radar indeso dan menjadi inputan pada software Ocean Data View 4 (ODV 4). Hasil penelitian menunjukkan bahwa puncak tangkapan tertinggi di Perairan Halmahera bagian Barat hasil tangkapan tertinggi terjadi pada bulan September dengan CPUE 1,45 dan terendah pada bulan Maret dengan CPUE sebesar 0,6154. Nilai rata-rata bulanan SPL berdasarkan hasil ekstraksi radar indeso setelah diekspor ke spreadsheet menunjukkan bahwa distribusi SPL secara temporal mengalami fluktuasi dengan suhu rata-rata bulanan adalah 29,15C dengan suhu tertinggi terjadi pada bulan Nopember dan terendah pada bulan Juli. Sebaran Klorofil-a di perairan ini mengalami fluktuasi dimana secara temporal, klorofil tertinggi terjadi pada bulan Oktober dan terendah pada bulan Februari 2016. Analisis regresi menunjukkan bahwa sebaran klorofil-a dapat mempengaruhi produktivitas cakalang hingga 52,69% di perairan ini, sisanya dipengaruhi oleh variabel lain di luar penelitian. Suhu permukaan laut hanya dapat berkontribusi sebesar 13% dalam mempengaruhi produksi cakalang di perairan Halmahera bagian barat ini.Kata Kunci : Halmahera , Katsuwonus pelamis, klorofil-a , suhu permukaan laut

Vegetation Structure and Damage Level Mangrove Forest in Manomadehe Island, Subdistrict South Jailolo, North Maluku Province Salim Abubakar; Riyadi Subur; Masykhur Abdul Kadir; Rina Rina; Adi Noman Susanto; Hendrik Suryo Suriandjo
Jurnal Biologi Tropis Vol. 21 No. 1 (2021): Januari - April
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v21i1.2492

Mangrove forest is a natural resource typical of tropical coasts, which has multiple benefits with a very broad impact when viewed from social, economic and ecological aspects. Management of natural resources must be very prudent because it takes a long time to be able to recover when damage / extinction has occurred. The purpose of this study was to determine the composition of mangrove species, the structure of mangrove forest vegetation (species density, relative density of species, frequency of species, relative frequency of species, species cover, relative cover of species and important values) and to determine the level of damage. Extraction of mangrove vegetation using the "spot check" method. The transects are drawn perpendicular to the coastline along the mangrove vegetation. The composition of mangrove species were 7 species, namely Rhizophora apiculata, R. stylosa, Bruguirea gymnorrhiza, Ceriops tagal, Sonneratia alba, Xylocarpus granatum and Aegiceras floridum. In the vegetation structure, the highest density and relative density were found in Rhizophora stylosa and the lowest was Xylocarpus granatum. The highest species and relative frequencies were Rhizophora stylosa, R. apiculata and the lowest were Bruguiera gymnorrhiza. The highest type and closure were Sonneratia alba and the lowest was Ceriops tagal. Meanwhile, the highest importance was in Sonneratia alba and the lowest was Xylocarpus granatum. Overall, the density value of mangrove species on Manomadehe Island is 2796 trees / ha so that the condition of the mangrove forests on Manomadehe Island is still in the good category (very dense).

Study of Composition and Composition of Macro Algae Habitat in the Intertidal Zone Water of Sibu Island, Nort Oba District Tidore Islands City Nort Maluku Sukmawati Djalil; Riyadi Subur; Rina Rina; Sunarti Sunarti; Yuyun Abubakar; Aryati A. Fadel; Adi Noman Susanto; Sarni Sarni
Jurnal Biologi Tropis Vol. 21 No. 2 (2021): Mei - Agustus
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v21i2.2582

Macro algae is a part of marine plants whose whole body is called the "thallus". Macro algae are widespread in tropical and sub-tropical waters. The purpose of this study was to determine the composition of the macro algae species, the width of the micro-habitat niches, and the overlapping of the micro-habitat niches in the intertidal zone of the waters of Sibu Island, Oba Utara District, Tidore Islands City. The data was collected using survey method using belt transects and squares measuring 1x1 m2 which are placed systematically in zigzags along the tansek belt. In this study, 20 species of macro algae were found in the waters of the island of Sibu, consisting of Halimeda macroloba, Halimeada opuntia forma chordata, Halimeda incrassata, Halimeda opuntia forma renschii, Chaetamorpha sp, Eucheuma cottonii, Sargassum duplicatum, S.polycestum, Turbina ornata, T. conoides, Padina boergesenii, Dictyota dichotoma, Amphiroa fragilissima, Acanthopora spicifera, Eucheuma denticulatum, E. spinosum, Glacilaria salicornia, Hypnea nidulans, Galaxaura apiculata. The results of the analysis of the width of the recesses showed that the macro algae species with the largest recess width were Eucheuma denticulatum with a value of 0.905, while Galaxura apiculata had the narrowest recess widths with a value of 0.200. Furthermore, based on the results of overlapping analysis of microhabitat niches, it shows that the overlap of microbaitate niches is quite large by Sargassum polycestum against Galaxaura apiculata with a value of 0.337, while the lowest was carried out by Halimeda macroloba against Galaxaura apiculata, Halimeda opuntia forma chordata against Galaxaura apiculata with a value of 0.337, while the lowest was carried out by Halimeda macroloba against Galaxaura apiculata, Halimeda opuntia forma chordata against Galaxaura apiculata, Eucheuma spinosum against Galaxaura apiculata with a value of 0.000.

Fauna Biodiversity as Indicator of Mangrove Forest Health on Moti Island, Moti District, Ternate City Salim Abubakar; Masykhur Abdul Kadir Masykhur Abdul Kadir; Reni Tyas Asrining Pertiwi; Rina Rina; Riyadi Subur; Sunarti Sunarti; Yuyun Abubakar; Adi Noman Susanto; Ariyati H. Fadel
Jurnal Biologi Tropis Vol. 21 No. 3 (2021): September - Desember
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v21i3.3009

The health condition of mangrove forests can be determined by assessing forest health indicators. One of the indicators used in determining the health of mangrove forests is faunal biodiversity. Measurement of forest health is a step that can be taken to ensure forest functions and benefits. The study's objectives were to determine the composition of mangrove species and mangrove forest fauna (birds and epifauna), to determine the structure of the fauna community which includes species diversity and species dominance and to determine the health condition of mangrove forests on Moti Island, Ternate Island District. This research was conducted on Moti Island, Moti District, Ternate City, North Maluku Province for six months, April - September 2021. A Sampling of mangroves was carried out using the "spot check" method. Meanwhile, the method used to assess mangroves' health condition refers to the FHM (Forest Health Monitoring) method. There are nine species of mangrove, namely Rhizophora apiculata, Rhizophora stylosa, Rhizophora mucronata, Bruguiera gymnorrhiza, Sonneratia alba, Xylocarpus granatum, Avicennia offincinalis, A. marina and Nypa fruticans. While the composition of fauna species is as many as 18 species consisting of Epifauna (Gastropoda = 12 species, Bivalve = 2 species) and birds as many as four species. The diversity of mangrove forest fauna species in all research locations is moderate and no species dominate. The health status of mangrove forests, both Tafaga and Figur villages, has 60% good condition, 20% moderate and poor conditions.

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