Swimming crab (Portunus pelagicus) is one of the economically important marine product commodities resulting from coastal waters Indonesia. Swimming crab in coastal waters of North Sulawesi usually caught accidentally with bottom gillnet. There has been a special fishing gear for crab traps, but not known by local fishermen. Addition of mackerel oil extract on baits could increase the fishing power of swimming crab traps but this kind of scientific information, particularly on swimming crab, not widely available yet. This research aims to study the effect of mackerel oil extract on traps bait to catch swimming crab; and to identify the types of biota captured. This research was conducted in coastal waters of Malalayang Satu, Malalayang District, Manado City; in December 2014 to January 2015; which is based on experimental methods. Six units of trap were operated seven nights; where tree units of them used scad mackerel bait that injected by mackerel oil extract, and tree other units just used scad mackerel bait without mackerel oil extract; and the capture data were analyzed by t test. The catch was 58 swimming crab in total; 42 fish was caught by scad mackerel bait with mackerel oil extract, and 16 swimming crab was caught by bait without mackerel oil extract. Analysis of t test showed that the use of mackerel oil extracts in bait traps, giving different swimming crab catches compared with bait without mackerel oil extracts. Keywords: swimming crab, trap, mackerel oil, Malalayang Manado ABSTRAK Ranjungan (Portunus pelagicus) merupakan salah satu komoditi hasil laut ekonomis penting yang dihasilkan dari perairan pantai Indonesia. Rajungan di perairan pantai Sulawesi Utara biasanya tertangkap tanpa sengaja dengan jaring insang dasar. Sebenarnya telah ada alat tangkap bubu khusus untuk rajungan, tetapi belum dikenal oleh nelayan lokal. Pemberian ekstrak berupa minyak tenggiri pada umpan diduga dapat meningkatkan kemampuan tangkap dari bubu ranjungan; namun informasi ilmiah seperti ini, khususnya pada ranjungan, belum banyak tersedia. Penelitian ini bertujuan untuk mempelajari pengaruh ekstrak minyak tenggiri pada umpan bubu terhadap hasil tangkapan ranjungan; dan mengidentifikasi jenis-jenis biota yang tertangkap. Penelitian ini dilakukan di perairan pantai Kelurahan Malalayang Satu, Kecamatan Malalayang, Kota Manado; pada bulan Desember 2014 sampai bulan Januari 2015; yang didasarkan pada metode experimental fishing. Enam unit bubu dioperasikan tujuh malam; di mana tiga unit menggunakan umpan ikan layang yang disuntikkan ekstrak minyak tenggiri, dan tiga unit lainnya hanya menggunakan umpan ikan layang tanpa ekstrak; dan data dinalisis dengan uji t. Tangkapan total berjumlah 58 ekor; 42 ekor tertangkap dengan umpan layang yang diberi ekstrak minyak tenggiri, dan 16 ekor tertangkap dengan umpan tanpa ekstrak minyak tenggiri. Hasil analisis uji t menunjukkan bahwa penggunaan ekstrak minyak tenggiri pada umpan bubu memberikan hasil tangkapan ranjungan yang lebih banyak dibandingkan dengan umpan tanpa ekstrak minyak tenggiri. Kata-kata kunci: rajungan, bubu, minyak tenggiri, Malalayang Manado. [1] Penulis untuk penyuratan; email: thompson@yahoo.com
Here, we report the results of our preliminary study on deep sea eDNA at fishing ground to approach the fisheries resources abundance at Sulawesi sea by using deep-sea water sampling collected from 10 sites ranging from 110m-200m in depth at front side of the International Coelacanth Research Center and Museum Base at Lolak Waters and Manado Bay North of Sulawesi using Nansen Bottle Sampler (1500 cc). The collected waters were filtered using Power Water Sterivex DNA Isolation Kits and preserved with the DNAiso Reagent then transported to Center for Strategy Research Project, University of the Ryukyus, Okinawa Japan where eDNA analyses were conducted. Our results revealed that the concentrations of eDNA has a good quality were measured with a NanoDrop Lite spectrophotometer, indicating eDNA was successfully extracted. Therefore, by using universal primers for eDNA, MiFish-U-F/R for the 1st-PCR (mt-12S amplification) and 2nd-PCR (tag-indexing) for library preparation to accommodate sequence variations and show that intense signal of MiFish eDNA amplification. Using a high-throughput Illumina MiSeq platform for sequencing analyses, we detected eDNA from 40 fish’s species with dominantly by Caranx sexfasciatus, Encrasicholina punctifer.
This study aims to analyze the five-year development of CPUE (catch per unit effort) and to find out the fishing effort of ring seine at PPP Tumumpa and its effect on CPUE periodically. Based on the research results, the CPUE value of large pelagics has decreased every year, where the CPUE value in 2017 was 25.42%, in 2018 it was 25.08%, in 2019 it was 17.71%, in 2020 it was 17.10%. , the last in 2021 was 14.66% and for small pelagics, the CPUE value decreased, where the CPUE value in 2017 was 21.70%, in 2018 it was 17.92%, in 2019 it was 17.19%, in 2018 it was 17.19%. in 2020 is 23.13%, and the last in 2021 is 20.04%. Utilization rates in large and small pelagics are in a state of concern as CPUE decreases yearly.Keywords: CPUE, production data, purse seine, utilization rate.AbstrakPenelitian ini bertujuan untuk menganalisis perkembangan lima tahun CPUE (catch per unit effort) dan mengetahui upaya penangkapan perikanan pukat cincin di PPP Tumumpa serta pengaruhnya terhadap CPUE secara periodik. Berdasarkan hasil penelitian nilai CPUE pelagis besar mengalami penurunan setiap tahun, dimana nilai CPUE pada tahun 2017 yaitu 25,42 %, pada tahun 2018 yaitu 25,08 %, pada tahun 2019 yaitu 17,71 %, pada tahun 2020 yaitu 17,10 %, terakhir pada tahun 2021 yaitu 14,66 % dan untuk pelagis kecil nilai CPUE mengalami penurunan, dimana nilai CPUE pada tahun 2017 yaitu 21,70 %, pada tahun 2018 yaitu 17,92 %, pada tahun 2019 yaitu 17,19 %, pada tahun 2020 yaitu 23,13 %, dan terakhir pada tahun 2021 yaitu 20,04 %. Tingkat pemanfaatan pada pelagis besar dan kecil berada dalam keadaan mengkhawatirkan karena CPUE mengalami penurunan setiap tahun.Kata Kunci: CPUE, data produksi, pukat cincin, tingkat pemanfaatan.
Bubu fisheries have developed well in all Indonesian waters, especially in coastal areas that have coral reef and seagrass habitats. Generally, the commodities targeted for fishing are types of reef fish and seagrass beds that have a high selling value, such as snapper, grouper, baronang, yellowtail, lobster, octopus, and others. Bubu fishing gear or traps called bebihe local people are one of the fishing gear used to catch demersal fish or reef fish. The success of the bubu fishing operation is greatly influenced by the construction of the bebihe fishing gear itself and the treatment of the bait used. The use of seagrass bait, allegedly can increase the catching ability of the bebihe. However, scientific information on the use of seagrass as a bait for bebihe for fishing is not yet available. Therefore, the purpose of this study is to determine the effectiveness of seagrass baits with the comparison of kitefish in the operation of bebihe; and identify the types of fish caught. This research was carried out in the waters of Beeng Laut island, South Central Tabukan District, Sangihe Islands Regency; is based on experimental methods. Six bebihe units were operated during nine trips to collect data; where three units use seagrass bait of the type Thalassia hemprichii, and the other three units use kite fish bait; and then the catch data is analyzed by a t-test. The catch of bebihe during the study amounted to 363 heads, as many as 345 were caught with seagrass baits, and 18 were caught with kite baits. Analysis of the t-test showed that at t count = 5.480 > t table 0.05;8 = 2.306; where this explains that the use of seagrass bait on bebihe, gives a noticeablely different catch compared to kitefish bait.Keywords: Bebihe, Seagrass, Bait, Seagrass Meadow Fish AbstrakUsaha perikanan bubu telah berkembang dengan baik di seluruh perairan Indonesia, terutama di wilayah pesisir yang memiliki habitat terumbu karang dan padang lamun. Umumnya komoditi yang menjadi target penangkapan adalah jenis ikan karang dan padang lamun yang memiliki nilai jual tinggi, seperti ikan kakap, kerapu, baronang, ekor kuning, lobster, gurita, dan lain-lain. Alat tangkap bubu atau perangkap yang oleh masyarakat lokal dinamakan bebihe adalah salah satu alat tangkap yang digunakan untuk menangkap ikan demersal atau ikan karang. Keberhasilan operasi penangkapan perikanan bebihe sangat dipengaruhi oleh konstruksi alat tangkap bebihe itu sendiri dan perlakuan umpan yang digunakan. Penggunaan umpan lamun, diduga dapat meningkatkan kemampuan tangkap dari bebihe. Namun informasi ilmiah tentang penggunaan lamun sebagai umpan bebihe untuk menangkap ikan belum tersedia. Oleh karena itu, tujuan dilaksanakannya penelitian ini yaitu untuk mengetahui efektifitas umpan lamun dengan perbandingan ikan layang pada pengoperasian bebihe; dan mengidentifikasi jenis-jenis ikan yang tertangkap. Penelitian ini dikerjakan di perairan pulau Beeng Laut, Kecamatan Tabukan Selatan Tengah, Kabupaten Kepulauan Sangihe; didasarkan pada metode eksperimental. Enam unit bebihe dioperasikan selama sembilan trip untuk mengumpulkan data; dimana tiga unit menggunakan umpan lamun jenis Thalassia hemprichii, dan tiga unit bebihe lainnya menggunakan umpan ikan layang; dan kemudian data hasil tangkapan dianalisis dengan uji t. Hasil tangkapan bebihe selama penelitian berjumlah 363 ekor, sebanyak 345 ekor tertangkap dengan umpan lamun, dan 18 ekor tertangkap dengan umpan ikan layang. Analisis uji t menunjukan bahwa pada t hitung = 5,480 > t tabel 0,05;8 = 2,306; dimana hal ini menjelaskan bahwa penggunaan umpan lamun pada bebihe, memberikan hasil tangkapan yang berbeda nyata dibandingkan dengan umpan ikan layang.Kata kunci : Bebihe, Lamun, Umpan, Ikan Padang Lamun
The Tondano watershed is a very important natural resource and has a strategic function for the surrounding area up to the city of Manado. However, lately there are many problems that occur in the Tondano watershed. The activity of community partnership program for the PKK group of women in the Pinaesaan Kelurahan is carried out, to refresh the knowledge of the existence and sustainability of the Tondano watershed and to recycle the 2 L plastic bottle waste for simple aquaponic activities.Keyword: Tondano Watershed, plastic waste, sustainability, PKK groupABSTRAKDaerah aliran sungai (DAS) Tondano merupakan sumberdaya alam yang sangat penting dan memiliki fungsi strategis bagi daerah sekitarnya sampai ke kota Manado. Namun demikian, akhir-akhir ini terdapat banyak permasalahan yang terjadi di DAS Tondano. Kegiatan program kemitraan masyarakat bagi kelompok ibu PKK di Kelurahan Pinaesaan dilakukan untuk penyegaran kembali tentang eksistensi dan keberlanjutan DAS Tondano serta mendaur ulang limbah botol plastik kemasan 2 L untuk kegiatan akuaponik
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