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Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan
Published by Universitas Syiah Kuala
ISSN : 20897790     EISSN : 25026194     DOI : 10.13170/depik
Core Subject : Science, Education, Engineering,
Earth & Planetary Sciences Education Engineering
Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan is a peer review international journal, this journal is publishing high-quality articles in aquatic sciences and fisheries in general. The aim of the journal is to publish and disseminate the current or new findings of the research, and give a significant contribution to the development of fisheries and aquatic sciences in several topics, but not limited to: Fisheries (Aquaculture, Capture Fisheries, Fish Processing) Aquatic Ecology (Freshwater, Marine, and Brackishwater) Aquatic Biology (Fish, Mollusk, Crustacean, Plankton, Coral reefs) Oceanography
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Oseanografi
Articles 944 Documents
 70   71   72   73   74 
Struktur komunitas ekosistem mangrove di kawasan pesisir Sidangoli Kabupaten Halmahera Barat, Maluku Utara Nebuchadnezzar Akbar; Abdurrachman Baksir; Irmalita Tahir
Depik Vol 4, No 3 (2015): DECEMBER 2015
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.4.3.3052

Abstract

Abstract. Mangroves is important ecosystem in coastal. However, multiple  destructive activities to cause reduced mangrove area. The information about area and criteria of mangrove in Sidangoli coastal area, had been doing, however information ecology mangrove unexplored. This information is required to plan better conservation strategy of mangrove. The study was conducted to infer the ecology of mangrove in the Sidangoli coastal of west halmahera regency, North Mollucas. A total of location diveded by four and perform in November 2014. Mangrove sampling, done by the "spot check". The results showed that mangrove of thickness ranging from 145-750 meters and founded 11 specieses from 5 families of mangroves. The ecology analysis showed that frequency and density of mangrove founded station three. Whereas persent cover contained station four and value sicnificant analysis in all station. The mangrove vegetation analysis contained the high frequency, density and value sicnificant is Rhizopora stylosa and high persent cover Sonneratia alba.the overall observation of mangrove explaided that mangrove ecosystem enter in low/damage criteria.Keywords:  Mangroves;  Rhizopora stylosa; spot check; Sonneratia alba Abstrak. Mangrove merupakan ekosistem penting di kawasan pesisir. Tetapi, berbagai macam aktivitas yang bersifat destruktif telah menurunkan luas penyebaran lahan mangrove. Informasi tentang luas dan kriteria mangrove di kawasan pesisir Sidangoli, Kabupaten Halmahera Barat telah dilakukan. Akan tetapi informasi tentang nilai ekologi mangrove belum dilaporkan, sehingga perlu adanya kajian tentang anailsis ekologi mangrove. Informasi nilai ekologi dapat dijadikan sebagai data untuk dijadikan sebagi acuan dalam merencanakan strategi konservasi. Penelitian ini bertujuan untuk mengetahui nilai ekologi mangrove dikawasan pesisir Sidangoli Kabupaten Halmahera Barat, Maluku Utara. Lokasi penelitian dibagi menjadi empat dan penelitian dilaksanakan pada November 2014. Pengambilan contoh mangrove, di lakukan dengan menggunakan metode “spot chek”. Hasil penelitian menunjukkan ketebalan mangrove berkisar 145-750 meter dan diperoleh sebanyak 11 jenis dari 5 famili mangrove. Analisis ekologi memperlihatkan bahwa nilai total kerapatan dan frekuensi tertinggi ditemukan pada stasiun  tiga. Sedangkan tutupan tertinggi pada stasiun empat serta nilai penting pada setiap stasiun adalah 300. Analisis vegetasi mangrove disetiap stasiun diperoleh kerapatan, frekuensi dan nilai penting jenis tertinggi adalah Rhizopora stylosa serta tutupan jenis tertinggi adalah Sonneratia alba. Total pangamatan jenis mangrove dan jumlah yang tersedia, menggambarkan kondisi ekosistem mangrove di pesisir Sidangoli masuk dalam kategori rendah/rusak.
Karakteristik pantai Taman Nasional Wakatobi dalam mendukung potensi wisata bahari: Studi kasus Pulau Wangiwangi Dini Purbani; Yulius .; Muhammad Ramdhan; Taslim Arifin; H.L. Salim; Nadya Novianti
Depik Vol 3, No 2 (2014): August 2014
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.3.2.1539

Abstract

Abstract. Wakatobi Regency with its capital Wangiwangi Island has a great potential of natural resources, i.e.  sloping white sandy beach which strategically stretched out from north to south. The purpose of  this research is to identify beach type, to make a map of beach type in Wangiwangi island  and to identify potential of object tourism.  The metodology of this research is using field observation and the Geographical Information System (GIS). The field obervation was used to measure the beach’s width, length and slope.  The tools used in research are geological compass and applicable measurement equipment. The result of field obervation was used to make spasial analysis to get Map of beach characteristic. Processing of beach map characteristic using ARC GIS 9.3. The lithology of Wangiwangi island beach is limestone, its morphology is of high relief and low relief and there are three types of its characteristic, (they are); sandy beach, sandy beach with fragment coral and cliff beach. The locations of sandy beach are at waha and cemara beach. The location of Sandy beach with fragment coral are at Wapia beach, in Patuno island, in Matahora island and for cliff  beach are at Weki beach, in Kapotan island, at Buni beach and Batutobengko beach. The sandy beach and sandy beach with fragment coral are suitable for coastal tourism such as swimming, sunbathing and fishing.Keywords: Geographical Information System (GIS); beach characteristic; Wangiwangi Island; coastal tourism. Abstrak. Kabupaten Wakatobi dengan pusat pemerintahan di Pulau Wangiwangi memiliki sumberdaya alam yang sangat potensial dengan pantainya yang landai dan berpasir putih, membujur dari utara ke selatan dan posisinya sangat strategis. Penelitian ini bertujuan untuk mengidentifikasikan jenis pantai di Pulau Wangiwangi dan memetakan kondisi pantai di Pulau Wangiwangi serta mengidentifikasikan potensi wisatanya . Metode yang digunakan dalam penelitian ini adalah metode observasi langsung dan analisis spasial. Pengamatan observasi langsung diterapkan untuk mengukur lebar pantai, panjang pantai dan berm menggunakan alat ukur meteran, sedangkan kemiringan pantai dengan kompas geologi. Hasil dari pengamatan pantai digunakan untuk membuat  analisis spasial sehingga diperoleh Peta jenis karakteristik pantai. Proses pengolahan mengunakan ARC GIS 9,3. Kondisi  pantai  Pulau Wangiwangi berdasarkan geologi (litologi penyusun)  didominasi oleh Batu Gamping Koral (Limestone), morfologi terdiri atas Relief Tinggi dan Relief Sedang sedangkan karakteristik pantai Pulau Wang-Wangi  terdiri dari  Pantai berpasir,. Pantai berpasir bercampur fragmen karang dan. Pantai bertebing karang. Lokasi Pantai Berpasir di Pantai Waha dan Pantai Cemara. Pantai Berpasir bercampur fragmen karang berada di Pantai Wapia, Pantai Patuno, Pulau Matahora, sedangkan Pantai bertebing karang tersebar di Pantai Weki, Pulau Kapotan, Bungi dan Batutobengko. Potensi wisata pantai dapat diusulkan pada jenis pantai berpasir dan pantai berpasir bercampur fragmen karang. Objek wisata antara lain berenang, berjemur dan memancing.
Performa pertumbuhan post-larva ikan jelawat (Leptobarbus hoevenii) pada berbagai kombinasi pakan alami dan buatan Mas T. D. Sunarno; Mas Bayu Syamsunarno
Depik Vol 6, No 3 (2017): December 2017
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.6.3.8731

Abstract

The study proposed to evaluate growth performance of post-larvae of jelawat (Leptobarbus hoevenii) fed on varius combination of natural food and artificial feed. Completely randomized design was assigned in this study. The treatments were various combinations of life feed of Moina sp. and artificial diet at a respective rates of 100:0%, 75:25%, 50:50%, 25:75% and 0:100%. The larvae of 20 days in age and 0.0287±0.0012 g  in weight was randomly stocked in 15 buckets at a stocking rate of five larvae per liter or 50 larvae  per bucket and fed on test diet at a feeding rate of 5% per body weight per day, divided in feeding frequency of five times for 45 days of rearing period. The results indicated that 20 days old of larvae jelawat fed on combinations of Moina sp. and artificial diet at 50:50 performed higher survival as well as growth.Tujuan penelitian adalah untuk mengevaluasi performa pertumbuhan post larvae jelawat (Leptobarbus hoevenii) pada berbagai kombinasi pakan alami dan pakan buatan. Rancangan Acak Lengkap digunakan dalam penelitian ini. Perlakuannya adalah berbagai kombinasi pakan alami Moina sp. dan pakan buatan, masing-masing yaitu 100:0%, 75:25%, 50:50%, 25:75% and 0:100%. Larva ikan jelawat umur 20 hari dengan bobot rata-rata 0,0287±0,0012 g ditebar secara acak ke dalam 15 buah ember dengan kepadatan 5 ekor per liter atau 50 ekor per wadah dan diberi pakan uji sebanyak 5% dari bobot tubuh per hari yang dibagi dalam lima kali pemberian selama 45 hari masa pemeliharaan. Hasil penelitian menunjukkan bahwa larva ikan jelawat umur 20 hari mempunyai kelangsungan hidup dan pertumbuhan lebih baik dengan pemberian kombinasi pakan alami Moina sp.. dan pakan buatan sebesar 50% : 50%.
Plankton potential as bioindicator of trophic status of Lokop River Leuser Ecosystem Andri Yusman Persada; Suri Purnama Febri; Kartika Aprilia Putri; Herlina Putri Endah Sari; Rianjuanda Djamani
Depik Vol 11, No 3 (2022): DECEMBER 2022
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.11.3.25034

Abstract

Lokop is one of the villages in East Aceh which has a watershed in the Leuser Ecosystem. Human activities have the potential to disrupt the Trophic Status of Lokop River, such as the use of pesticides for agriculture, household waste and the use of potassium for fishing. It is necessary to research the quality of the waters in the Lokop River. The plankton community present in river waters can be an indicator of environmental pollution by analyzing the saprobic index. This study aims to determine the index of plankton diversity and water quality in the Leuser Ecosystem of the Lokop River through the saprobic index. The research was conducted at three stations. A sampling of plankton was taken in the form of a 10 cc filtrate and five replications were carried out for each study site. Water quality measurements include pH, TDS, Temperature, transparancy, depth, and current. 11 potential species can be used as pollution indicators in the Lokop River, namely Cladophora sp, Diatoma elongatum, Fragilaria capucina, Oedogonium sp., Gonatozygon sp, Lyngbya agardh, Melosira sp., Merismopedia punctata, Microspora sp, Pinnularia sp, Synedra ulna. The plankton diversity index is in the medium category. Based on the Saprobic Index, the level of pollution at the research site was not to lightly loaded of organic pollution and lowly loaded of organic pollution.Keywords:IsoprobikPlanktonBioindicatorLokop
Observation and numerical modeling of physical oceanography in the Balikpapan Bay, East Kalimantan: Preliminary results Mutiara Rachmat Putri; Iwan P Anwar; Zetsaona Sihotang; Lamona I. Bernawis; Agus Setiawan; Muhammad Riza; Idris Mandang; Willem M. Tatipatta
Depik Vol 10, No 2 (2021): August 2021
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.10.2.19259

Abstract

The Indonesian government plans to move the capital city from Jakarta to Penajam Paser Utara (PPU) which is the upstream area of Balikpapan Bay, East Kalimantan. There are several activities in the planned new capital city that potentially affect the condition of land and marine ecosystems, including clearing new land for housing and agriculture as well as expanding mining and petroleum areas. Directly or indirectly, these activities could affect the oceanographic conditions of Balikpapan Bay. For this reason, in order to obtain an up-to-date picture of Balikpapan Bay, an oceanographic survey was conducted in early March 2020. In addition, to support the analysis of marine dynamics in these waters and their predictions in the future, numerical simulations of hydrodynamic modeling were also carried out. Oceanographic observations indicate significant water stratification in the area about 20 km from the mouth of the bay. This result is also well illustrated in the hydrodynamic model numerical simulation, where there is a water loop at the confluence between salt and fresh water masses from two rivers 18-20 km from the mouth of Balikpapan Bay. Keywords:The national capital city of IndonesiaBalikpapan BayPhysical oceanography ObservationCoastal and marine Ecosystem
Pengaruh fase bulan dan pasang surut terhadap kemunculan pari manta (Manta alfredi) di Perairan Karang Makassar, Taman Nasional Komodo Nusa Tenggara Timur Muhammad Ichsan; Dulmi’ad Iriana; Muhammad Yusuf Awaluddin
Depik Vol 2, No 2 (2013): August 2013
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.2.2.749

Abstract

Abstract. Karang Makassar is known as Manta point which is located in the Komodo National Park, Indonesia. This location is one of the habitat for manta ray. This research was conducted to find out the relationship between the appereance of manta ray with lunar pattern and tidal cycle. Observation data was collected from September to October 2012. Photo ID method was used to assess the number of manta ray appeareance. Lunar pattern data was obtained from USNO NAVY database, and tidal cycle was obtained from WX Tide Prediction Server. The result shows that from 20 dives, the highest average number of manta rays appearance was during full moon by 9,8 individual per dive. Meanwhile, during half moon and new moon were only 3 individual appearances per dive. On the other hand, based on tidal cycle, the highest manta rays appeareance was found during rising by 6,5 individual per dive, on falling by 4,4 individual per dive, and the lowest on slack by 3,4 individual per dive. We suggest that the best time for seeing manta rays in this location is during full moon and raising time.  Keywords: Manta rays; Lunar patterns; Tidal cycle; National Komodo Park  Abstrak. Perairan Karang Makassar, dikenal sebagai Manta Point yang berada di Taman Nasional (T.N.) Komodo, Indonesia. Lokasi ini merupakan salah satu habitat bagi pari manta. Penelitian kali ini dilakukan untuk mengetahui hubungan antara kemunculan  pari manta dengan fase bulan dan pasang surut. Pengambilan data dilakukan pada bulan September – Oktober 2012. Metode Photo ID dipergunakan untuk menhitung jumlah individu kemunculan pari manta. Sedangkan untuk data fase bulan diperoleh dari USNO NAVY berupa persentasi cahaya bulan, sedangkan untuk pasang surut didapatkan dari WX Tide Prediction Server. Hasil menunjukkan bahwa dari 20 kali penyelaman, rata-rata kemunculan tertinggi terjadi saat fase bulan penuh sebesar 9,8 individu per penyelaman. Pada bulan setengah jumlah kemunculan paling sedikit yaitu 3 kemunculan per penyelaman, sama dengan fase bulan baru yaitu 3 kemunculan per penyelaman. Sementara itu berdasarkan pola pasang surut, diperoleh rata-rata jumlah individu tertinggi yang muncul yaitu pada pada saat pasang sebanyak 6,5 individu per penyelaman, saat surut sebesar 4,4 individu per penyelaman, sedangkan pada saat kendur paling sedikit  yaitu sebesar 3,4 individu per penyelaman. Kami menyarankan bahwa waktu yang terbaik untuk melihat pari manta di lokasi ini adalah pada saat bulan penuh dan saat pasang.Kata kunci: Pari Manta; Fase Bulan;  Pasang Surut; Taman Nasional Komodo
Kriopreservasi sperma ikan kawan Poropontius tawarensis menggunakan Dimetil sulfoxida (DMSO) Cut Ruhul Muthmainnah; Zainal A. Muchlisin; Kartini Eriani; Iwan Hasri; Nur Fadli; Abdullah A. Muhammadar
Depik Vol 8, No 3 (2019): December 2019
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.8.3.15072

Abstract

Abstract. Kawan fish (Poropuntius tawarensis) is an endemic fish found in Danau Laut Tawar, Central Aceh, Indonesia. This species has been threatened by ecological partubation, unfrindly fishing practices and pollution.  Cryopreservation is one of the ways to maintain the presence of these fish. Cryoprotectant (CP) is a critical material in the cryopreservation and DMSO is a common CP used in cryopreservation. Hence, the aim of the present study was to determine the optimum DMSO concentration for kawan fish sperm. The completely randomized design with 6 treatments and 3 replications were used in this study. The tested treatment was the difference of DMSO concentration, namely; 0, 3%, 6%, 9%; 12%, and 15% DMSO was combined with 5% egg yolk. The ratio of sperm to diluent is 1: 20. The cryotubes containing diluented sperm were evaporated at 5 cm from the surface of liquid nitrogen for 10 min, then stored in a liquid nitrogen container at -1960C for 2 weeks, then thawed and analyzed for the quality. The results showed that fresh sperm of kawan fish had motility of 48.67%, pH 7, milky white, with moderate consistency. The assessment of mass movements shows that the sperm has good quality. The ANOVA test showed that the addition of DMSO in diluents gavee significant effect on sperm motility, fertility and hatchability rates of fish eggs (P 0.05). The highest percentage of sperm motility and fertilization rates of fish eggs were found at concentration of 6%, respectively with the value of 46.67% and 45.67%, respectively. The highest percentage of hatching rate was also found in similar concentration of DMSO with the value of 19.33%. %. The DNA integrity test using the electrophoresis gel method showed that there was damage to DNA fish sperm after freezing, the the lower damage was found at 9% and 12% DMSO. It is concluded that the optimum concentration of DMSO for kawan fish sperm is at 6% of DMSO. Key words: kawan fish (Poropuntius tawarensis), cryopreservation, DMSO, DNA integrity Abstrak. Ikan kawan (Poropuntius tawarensis) merupakan ikan endemik yang terdapat di Danau Laut Tawar, Aceh Tengah, Indonesia. Menurut IUCN (International Union for Conservation of Nature), ikan ini termasuk ikan yang terancam punah oleh sebab kerusakan lingkungan, penangkapan tidak ramah lingkungan dan polusi. Salah satu cara untuk menjaga keberadaan ikan tersebut adalah dengan penerapan metode kriopreservasi sperma. Oleh karena itu, penelitian ini bertujuan untuk menentukan konsentrasi DMSO optimum dan melihat kerusakan DNA yang terjadi pada sperma ikan kawan(Poropontius tawarensis) pasca pembekuan.Metode yang digunakan dalam penelitian ini adalah Rancangan Acak Lengkap (RAL) dengan 6 perlakuan dan 3 ulangan.Perlakuan yang diuji adalah perbedaan konsentrasi DMSO dengan konsentrasi 0; 3%; 6%; 9%; 12% dan 15%.DMSO tersebut dikombinasikan dengan 5% kuning telur. Perbandingan sperma dengan pengencer adalah 1 : 20. Semua cryotube yang berisi sperma dan pengencer diuapkan pada jarak 5 cm dari permukaan nitrogen cair selama 10 menit, selanjutnya, disimpan dalam kontainer nitrogen cair bersuhu -1960C untuk disimpan selama 2 minggu. Hasil penelitian menunjukkan bahwa sperma segar ikan kawan memiliki nilai motilitas sebesar 48,67%, pH 7, berwarna putih susu, dengan konsistensi sedang. Penilaian gerakan massa menujukkan bahwa sperma tersebut berkualitas baik. Hasil uji ANOVA menunjukkan bahwa penambahan DMSO dalam pengencer berpengaruh nyata terhadap motilitas, fertilitas dan daya tetas telur ikan kawan (Poropontius tawarensis) (P0,05) setelah pembekuan. Selanjutnya, uji lanjut Duncan menunjukkan bahwa persentase motilitas sperma dan pembuahan telur ikan kawan tertinggi terdapat pada penambahan DMSO dengan konsentrasi 6%, masing-masing sebesar 46,67% dan 45,67%. Persentase penetasan telur tertinggi juga dijumpai pada perlakuan 6% DMSO, dengan nilai 19,33%. Hasil uji integritas DNA menggunakan metode elektrofresis gel menunjukkan bahwa terdapat kerusakan pada DNA sperma ikan pasca pembekuan, Kerusakan yang terendah terdapat pada konsentrasi DMSO 9% dan 12%. Namun secara umum, disimpulkan bahwa konsentrasi optimum untuk kriopreservasi ikan kawan adalah 6% DMSO.Kata kunci: ikan kawan (Poropuntius tawarensis), kriopreservasi, DMSO, integritas DNA
Status ekologis mangrove Pulau Sembilan, Kabupaten Langkat Provinsi Sumatera Utara (Ecological status of mangrove of Sembilan Island, Langkat Regency, North Sumatra Province) Ahmad Muhtadi; Rudi H. Siregar; Rusdi Leidonald; Zulham A. Harahap
Depik Vol 5, No 3 (2016): December 2016
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.5.3.5656

Abstract

Sembilan Island was one of the 17 islands located in the East Coast of North Sumatra. This island is surrounded by mangrove with varying thickness and density. Information on the identification and potential of mangrove in this island already reported but limited to a narrow area. Information about the value and status of mangrove ecology in this island have not been written, so it was needed to carry out for a study of mangrove ecological analysis. This information could be used later as a reference in sustainable mangrove management. The objective of the study was to determine the value and ecological status of mangroves. The research was conducted in September 2015. The data were collected at 9 sampling points namely; 4 points in the east, 2 points in the south and 3 points in the west part of the study areas. The spot check method was used in the study. The results showed that there were 28 species of mangrove belonging to 13 families. It's divided into  26 species of true mangrove and two species of associated mangroves. Mangrove’s zonation was Avicennia/Sonneratia on the front and ferns (A. Aureum and A. speciosum) in the section near the mainland. Mangrove thickness reached 134 - 1683 m. The density of mangrove was 333 - 4601 individuals/ha with the cover area of 2522 - 5810 cm2/ha. The results of the importance index value of mangrove showed that A. marina has a great influence and role in the community of mangrove vegetation, especially in the eastern part. Therefore, the mangrove in Sembilan Island was categorized into damage to good condition. The good category was recorded in the western part of the island, while the damaged category was found in the east part of the island.Pulau Sembilan merupakan satu diantara 17 pulau yang terdapat di wilayah Pantai Timur Sumatera Utara. Hampir sepanjang pantai di Pulau Sembilan di tumbuhi oleh mangrove dengan ketebalan yang bervariasi. Informasi tentang identifikasi dan potensi mangrove di Pulau Sembilan sudah ada dilaporkan, namun terbatas pada areal yang sempit. Informasi tentang nilai dan status ekologi mangrove di Pulau Sembilan belum dilaporkan, sehingga perlu adanya kajian tentang analisis ekologi mangrove. Informasi ini nantinya dapat dijadikan sebagai acuan dalam pengelolaan mangrove yang berkelanjutan. Penelitian ini bertujuan untuk mengetahui nilai dan status ekologis mangrove di Pulau Sembilan. Lokasi penelitian dibagi menjadi tiga area dengan 9 titik pengamatan yaitu timur 4 titik, selatan 2 titik, dan barat 3 titik. Penelitian dilaksanakan pada September 2015. Pengambilan contoh mangrove, dilakukan dengan menggunakan metode spot check. Hasil penelitian didapatkan bahwa jenis mangrove yang sebanyak 28 jenis dari 13 famili yang terdiri dari 26 jenis mangrove sejati dan 2 jenis mangrove ikutan. Zonasi mangrove di Pulau Sembilan yaitu, Avicennia/Sonneratia pada bagian depan dan paku-pakuan (A. Aureum dan A. speciosum) pada bagian yang dekat daratan. Ketebalan mangrove mencapai 134 - 1683 m. Kerapatan mangrove yang ditemukan mencapai 333 - 4601 ind/ha. Penutupan mangrove mencapai 2522 - 5810 cm2/ha. Hasil analisis nilai penting jenis mangrove di Pulau Sembilan menunjukkan bahwa A. marina memiliki pengaruh dan peran yang besar dalam komunitas vegetasi mangrove, terutama pada bagian timur. Mangrove di Pulau Sembilan termasuk kategori rusak - baik. Kategori baik pada bagian barat dan rusak pada bagian timur.
Percentage of the bycatch and discard composition in artisanal bottom trap fisheries Nofrizal Nofrizal; Afni Afriani; Deni Efizon; Romie Jhonnerie
Depik Vol 11, No 2 (2022): August 2022
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.11.2.26106

Abstract

Data on bycatch in the fishing effort required to manage fisheries resources. Unfortunately, the data on small-scale and traditional fisheries is still lacking. It makes it challenging to make fishing policies and regulations. Survey activities and experimental fishing were conducted to determine and analyze the composition of the main catch, bycatch and discarded by the local fisher's bottom traps in Sibolga, North Sumatra, Indonesia. Five units of the trap with a size of 150 cm x 100 cm x 50 cm (length x width x height) were used to collect fish data. These five trap units operated in the fishing ground, where local fishers usually operate their fishing gear. The fishing operation carried out within 1 mile of the coastline with water depths ranging from 7-10 meters. The duration of trap setting around 5-7 days for each fishing operation. A motorboat operated with a weight of 5.8 GT. The results showed that the total bottom trap catch consisted of 329 individuals with a total weight of 151.4 kg and 12 demersal fish species. The main catch was 148 individuals (88.9 kg), or 44.7% of the total catch during the experiment i.e. Chepalapholis urodeta, Ephinephelus areolatus, Epinephelus chlorostigma, Plectropomus leopardus, Ephinepelus coioides, Lates calcarifer, Lutjanus malabaricus, and Lutjanus erytropterus. The bycatch was 151 individuals (57.1 kg) or 46.1% i.e. Lethrinus obsoletus, Lutjanus ehrenbergii, Acanthurus auranticavus, Platax teira, Nemipterus japonicus, Scarus rivulatus, Lutjanus johnii, Siganus canaliculatus, Caesio cuning, and Taeniura lymma.While the discarded catch amounted to 30 individuals (5.4 kg) or 9.2% i.e. Naso brevirostris, Diodon holocanthus, and Diadema setosum. The bycatch utilization obtained by fishers was 83.4%, and the unutilized was 16.6%. The percentage of fish sizes worthy for consumption was 135 individuals (74.6%), and the size unworthy for consumption was 46 individuals (25.4%).Keywords:Fishing groundFishing gear Fishing operation Main catchTrap
Variasi morfometrik tiga jenis kepiting biola jantan (Decapoda: Ocypodidae) yang ditangkap di Kawasan Mangrove Jaboi, Pulau Weh, Indonesia Djamani Rianjuanda; Ilham Zulfahmi; Kavinta Melanie; Chairun Nisa; Epa Paujiah; Irfannur Irfannur; Muliari Muliari; Rena Marlinda
Depik Vol 9, No 3 (2020): December 2020
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.9.3.16887

Abstract

The objective of the present study was to analyze the morphometrics variation of three male fiddler crab species collected from Jaboi mangrove area, Weh island, Indonesia. A total of 50 male fiddler crab species from each species (Tubuca dussumieri, Gelasimus vocans and Austruca perplexa) were collected from three research station used digging method and direct capture. The number of morphological characters that measured was 18 characters. The water quality and soil parameters observed were salinity, pH of water and soil, water temperature, C-organic concentration in substrate and sediment type. ANOVA (confidence interval of 95%) and Discriminant Function Analysis was used for analizing the morphometric variation beetwen species. The results showed that the mangrove area of Jaboi, Weh island provides a suitable habitat characteristic for male fiddler crab. Tubuca dussumieri and Gelasius vocans tend distributed in the area with sediment type of mud, while Austruca perplexa tends distributed in the area with sediment type of sand. The result of statistical analysis showed that there were ten separate characters between Tubuca dussumieri and Gelasimus vocans, 17 separate characters between Tubtubuca dussumieri and Austruca perplexa, and 13 separate characters between Gelasimus vocans and Austruca perplexa. Morphometrics variation can be observed in the carapace, propodus, mouth, walking legs, and eye stalks.Keywords:Morphometric variationCarapacs lengthBig propudusSmall propudusWalking legsABSTRAKPenelitian ini bertujuan untuk mengetahui variasi morfometrik tiga jenis kepiting biola jantan yang ditangkap di kawasan mangrove Jaboi Pulau Weh, Indonesia. Sebanyak 50 ekor kepiting biola jantan dari masing masing jenis (Tubuca dussumieri, Gelasimus vocans dan Austruca perplexa) dikoleksi dari tiga titik stasiun penelitian menggunakan metode digging dan pengambilan langsung. Jumlah karakter morfometrik kepiting jantan yang diukur adalah sebanyak 18 karakter. Parameter kualitas air dan tanah yang diukur meliputi salinitas, pH air, pH tanah, suhu air, kandungan C-organik subtrat dan tipe sedimen. Analisis terhadap data morfometrik dilakukan menggunakan ANOVA (selang kepercayaan 95%) dan Discriminant Function Analysis. Hasil penelitian mengungkapkan bahwa kawasan mangrove Jaboi, Pulau Weh memiliki karakteristik habitat yang sesuai bagi kepiting biola. Tubuca dussumieri dan Gelasimus vocans cenderung terdistribusi pada wilayah dengan persentase tipe sedimen lumpur yang lebih tinggi, sementara Austruca perplexa cenderung terdistribusi pada wilayah dengan persentase tipe sedimen pasir yang lebih tinggi. Hasil analisis statistik menunjukkan bahwa terdapat 10 karakter pembeda antara Tubuca dussumieri dengan Gelasimus vocans, 17 karakter pembeda antara Tubtubuca dussumieri dengan Austruca perplexa dan 13 karakter pembeda antara Gelasimus vocans dengan Austruca perplexa. Variasi morfometrik tersebut dapat terlihat pada bagian karapas, capit, mulut, kaki gerak dan tangkai mata.Kata kunci:Variasi morfometrikPanjang karapasCapit besarCapit kecilKaki gerak

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