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Journal of Fisheries & Marine
Published by Universitas Airlangga
ISSN : 20855842     EISSN : 25280759     DOI : https://doi.org/10.20473/jipk.v16i1.44436
Core Subject : Science,
Biochemistry, Genetics & Molecular Biology
Jurnal Ilmiah Perikanan dan Kelautan (JIPK; English: Scientific Journal of Fisheries and Marine) ISSN International Centre | ISSN:2528-0759 (Online) | ISSN: 2085-5842 (Print) JIPK is a peer-reviewed and open access biannually (April and November) that published by the Faculty of Fisheries and Marine, Universitas Airlangga. The aim of JIPK is to publish exciting, empirical research, recent science development, and high-quality science that addresses fundamental questions in fisheries and marine. JIPK only accepts manuscripts written in full English and processes submitted original script related of scope to fisheries and marine science and not being published by other publishers. We publish four categories of papers; 1) Original research papers, 2) Critical review articles, 3) Short communications, and, 4) Special Issue on applied or scientific research relevant to freshwater, brackish and marine environments. This journal gives readers the state of art of the theory and its applications of all aspects of fisheries and marine science. The scope of this journal includes, but is not limited to the research results of: Aquaculture, Fish Diseases, Marine science, Oceanography, Aquatic resources management, Fisheries product technology, Fish capture, technology, Fishery agribusiness, Fishery biotechnology/molecular genetics, Fish health management. JIPK has been indexed in Scopus, DOAJ, Sinta 1, Dimensions, Crossref, and others indexing. This journal has been accredited as a 1st Grade Scientific Journal (Sinta 1) by the Ministry of Research, Technology, and Higher Education of Indonesia since 8 December 2020.
Arjuna Subject : Biokimia, Genetika dan Biologi Molekuler - Biokimia
Articles 560 Documents
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Benefits of Tiwai Onion (Eleutherine americana) Extract as Phytopharmaceutical Plant to Inhibit the Growth of Vibrio harveyi Through in-Vitro and in-Vivo Azis Azis; Jimmy Cahyadi
Jurnal Ilmiah Perikanan dan Kelautan Vol. 12 No. 1 (2020): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v12i1.12826

Abstract

HighlightsEleutherine americana was a plant that was known to contain antibacterial alkaloids, steroids, phenolics, and flavonoidsEleutherine  americana extract was able to inhibit the development of V. harveyi both through in vitro and in vivo tests on tiger shrimp (Penaeus monodon).The use of vibriosis antibiotics in tiger shrimp was often not controlled so the results obtained were not effective AbstractThe use of vibriosis antibiotics in tiger shrimp was often not controlled, so the results obtained were not effective. The addition of antibiotics would cause resistance to V. harveyi. Eleutherine americana is a plant that is known to contain antibacterial alkaloids, steroids, phenols, and flavonoids. This study aimed to determine the effectiveness of inhibitory effects of E. americana extract against V. harveyi through in-vitro and in-vivo tests on tiger shrimp larvae. In-vitro testing consisted of 7 treatments and 3 replications, namely treatments A (0.1%), B (0.2%), C (0.3%), D (0.4%), E (0, 5%), F ethanol 70% (K-), and G chloramphenicol 0.01% (K +) treatment. The largest inhibition zone diameter of E. americana extract was shown in treatment C (0.3%), with an average value of the inhibition zone produced of 7.5 mm. Challenge test with V. harveyi concentration of 107 CFU / ml in the in-vivo test consisted of 5 treatments and four replications namely; A treatment without E. americana extract, B extract 6 ppm, C extract 12 ppm, D extract 18 ppm, and treatment E without extract and V. harveyi. The results of the challenge test with V. harveyi bacteria were significantly different in control (chloramphenicol 0.01%), where the highest survival rate was in the treatment of 12 ppm extract (43.34%). E. americana extract could inhibit the development of V. harveyi bacteria both through in-vitro and in-vivo tests on tiger shrimp (Penaeus monodon).  
Population Structure and Life Table of Dog Conch (Strombus turturella) in Bangka Belitung Islands, Indonesia [Struktur Populasi dan Tabel Hidup Siput Gonggong (Strombus turturella) di Kepulauan Bangka Belitung, Indonesia] Okto Supratman; Okto Supratman; Tati Suryati Syamsudin
Jurnal Ilmiah Perikanan dan Kelautan Vol. 11 No. 2 (2019): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v11i2.13112

Abstract

AbstractDog Conch (Strombus turturella) has an essential economic value in Bangka Belitung Islands. Allegedly, the population of Dog Conch is decreasing due to overexploitation. The purpose of this study is to provide information related to the distribution of long frequency, growth pattern, age group, recruitment time estimation and life table of Dog Conch. This research took place on the coast of Tukak Village and Anak Air Island, Bangka Belitung Islands. Samples of Dog Conch were taken using 3x3 m2 square. The shell length of Dog Conch found ranged between 18.18 to 77.49 mm, consisting of three age groups. Asymptotic length value (L∞), growth coefficient (K) and theoretical age on zero-length (t0) were 83.94 mm, 0.79/year and -0.152 sequentially. In the first year, Dog Conch grows to 50.18 mm and slows down when it grows older until it is 13 years old. The proportion of high mortality rate was at 1 to 2 years old and 3 to 4 years old or in adult individuals, while the highest life expectancy rate was in the age group of 0-1-year old or young individuals. It indicated that the high mortality rate was in the group in which people use to consume or sell in the marketsAbstrakSiput gonggong (Strombus turturella) memiliki nilai ekonomis penting di Kepulauan Bangka Belitung. Diduga populasi siput gonggong semakin menurun akibat dari eksploitasi berlebihan. Tujuan penelitian ini adalah untuk memberikan informasi terkait distribusi frekuensi panjang, pola pertumbuhan, kelompok umur, estimasi waktu rekruitmen dan tabel hidup siput gonggong. Lokasi penelitian berada di Pesisir Desa Tukak dan Pulau Anak Air, Kepulauan Bangka Belitung.Pengambilan sampel siput gonggong dilakukan dengan menggunakan kuadrat 3x3 m2. Panjang cangkang siput gonggong yang ditemukan berkisar antara 18.18 s.d 77.49 mm yang terdiri atas 3 kelompok umur. Nilai panjang asymptotic (L∞), koefisien pertumbuhan (K) dan umur teoritis ketika panjang sama dengan nol (t0) adalah 83.94 mm, 0.79/tahun dan -0.152 secara berurutan. Pada tahun pertama siput gonggong mengalami pertumbuhan, mencapai 50.18 mm dan melambat ketika umur semakin tua hingga umur 13 tahun. Proporsi laju kematian tinggi terdapat pada umur 1 s.d 2 tahun dan 3 s.d 4 tahun atau pada individu dewasa, sedangkan nilai harapan hidup tertinggi terdapat pada kelompok umur 0-1 tahun atau individu muda. Hal ini menunjukkan bahwa kematian tertinggi terdapat pada kelompok umur yang telah diambil oleh masyarakat untuk dikonsumsi dan dijual ke pasaran.
Identification of Secondary Metabolites from Ethanol Extract of Ciplukan (Physalis angulate) Leaves and Toxicity Test on Post-Larvae of Tiger Shrimp (Penaeus monodon) [Identifikasi Senyawa Metabolit Sekunder Ektrak Etanol Daun Ciplukan (Physalis angulata) dan Uji Toksisitas terhadap Sintasan Post Larva Udang Windu (Penaeus monodon)] Awaludin Awaludin; Yulma Yulma; Kartina Kartina
Jurnal Ilmiah Perikanan dan Kelautan Vol. 11 No. 2 (2019): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v11i2.13162

Abstract

AbstractPhysalis angulata is a garden plant that has been widely used as a medicinal plant by the community. This plant contains secondary metabolites that can be used as medicine and nutrition enhancement. This study aims to identify the secondary metabolite compounds and their toxicity to the post-larva (PL) survival rate in tiger prawns. This study was conducted in several stages (1). P. angulata extraction using ethanol, (2) P. angulata GCMS test, (3) The identification of the secondary metabolites from P. angulata (4) LC50 test (Lethal Concentration 50) and (5) Data analysis. Based on the results of GCMS analysis, it was indicated that P. angulata contained the secondary metabolite compounds, including phenols, steroids, fatty acids, terpenoids, benzenes, and alkaloids. It is concluded that the compounds contained are presumed to be beneficial for prawn farming development in terms of disease prevention, growth acceleration, and egg quality improvement. Meanwhile, the toxicity test results by using tiger prawn larvae for 48 hours revealed that the safe concentration level used for prawn development by utilizing the cutleaf groundcherry extract was at 13.1 mg/l.AbstrakPhysalis angulata merupakan tumbuhan pekarangan yang telah banyak dimanfaatkan sebagai tumbuhan obat oleh masyarakat. Tumbuhan ini diduga memiliki metabolit sekunder yang dapat dimanfaatkan sebagai obat dan peningkatan nutrisi. Penelitian ini bertujuan untuk mengindentifikasi senyawa metabolik sekunder dan toksisitasnya terhadap sintasan post larva (PL) udang windu. Penelitian ini dilakukan dengan beberapa tahapan (1). Ekstraksi P. angulata dengan menggunakan etanol, (2) Uji GCMS P. angulata, (3) Identifikasi metabolit sekunder dari P. angulata (4) Uji LC50 (Lethal Concentration 50) dan (5) Analisis data. Berdasarkan hasil analisis GCMS menunjukkan bahwa P. angulata mengandung metabolit sekunder golongan senyawa antara lain fenol, steroid, asam lemak, terpenoid, benzene dan alkaloid. Senyawa- senyawa yang terkandung tersebut diduga dapat dijadikan sebagai pengembangan budidaya udang pada penanggulangan penyakit, percepatan pertumbuhan dan peningkatan kualitas telur. Sedangkan hasil uji toksisitas dengan menggunakan larva udang windu selama 48 jam menunjukkan bahwa konsentrasi aman yang dapat digunakan untuk pengembangan udang dengan memanfaatkan ekstrak ciplukan dengan konsentrasi 13,1 mg/l.
Lobster Population Parameter in Bumbang Bay, Central Lombok [Parameter Populasi Lobster Perairan Teluk Bumbang, Lombok Tengah] Yonvitner Yonvitner; Zulhamsyah Imran; Sulaeman Martasuganda; Beni Osta Nababan; Fransiskus Mao Tokan; Septian Dwi Cahyo; Rifki Aldi Ramadhani
Jurnal Ilmiah Perikanan dan Kelautan Vol. 11 No. 2 (2019): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v11i2.13185

Abstract

AbstractBumbang bay is one of the lobster fishing areas in Central Lombok District, where fishing is carried out at all times and has the potential to disrupt the sustainability of the population in the future. Data is collected from the stock of lobster stocks that are still in fishing cages. Potential risks and fishing pressure could be assessed through length and weight, growth, structure size and potential recruitment analysis. The results of the study found 6 species of lobsters, of which are 2 dominant species were pearl lobster (45.5%) and sand lobster (44.5%) of the total catch. The Length and weight relationship have a negative allometric pattern which is (pearls lobster b = 2.04 and sand lobster = 1.2). The growth rate is relatively slow with a growth rate coefficient of 0.2-0.49 per year. Therefore, recruitment per biomass from the population is also low and exploitation rate about 0.6. The population growth and recruitment relatively low and increasing the exploitation rate, potential to unsustainable of the lobster population in the future.AbstrakPerairan Teluk Bumbang adalah salah satu pusat perikanan lobster di Lombok Tengah, dimana penangkapan dilakukan setiap waktu dan berpotensi mengganggu keberlanjutan populasi dimasa yang akan datang. Potensi risiko dan tekanan penangkapan dapat dikaji melalui analisis panjang dan bobot, pertumbuhan, struktur ukuran dan potensi recruitment. Hasil penelitian ditemukan sebanyak 6 jenis lobster, dimana 2 jenis dominan yaitu lobster mutiara (45,5%) dan lobter pasir 44,5% dari total tangkapan. Hubungan panjang dan berat memiliki pola allometrik negatif (lobster mutiara b=2,04 dan lobster pasir =1,2). Pertumbuhan tergolong lambat dengan koefisien laju pertumbuhan 0,2-0,49 per tahun. Begitu juga recruitment per biomass dari populasi juga rendah dan eksploitasi tergolong tinggi yaitu 0,6. Kemampuan tumbuh yang lambat dengan recruitment yang rendah serta eksploitasi tinggi, potensial menganggu keberlanjutan populasi lobster dimasa yang akan datang.
Tidal Current Influence on Distributing Submarine Groundwater Discharge (SGD) Area in the North Lombok Waters, Indonesia [Pengaruh Arus Pasang Surut dalam Distribusi Keluaran Air Tanah Lepas Pantai (KALP) di Perairan Lombok Utara, Indonesia] Ulung Jantama Wisha; Gunardi Kusumah
Jurnal Ilmiah Perikanan dan Kelautan Vol. 11 No. 2 (2019): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v11i2.13289

Abstract

AbstractSubmarine Groundwater Discharge (SGD) has been found in the North Lombok Island. This phenomenon is strongly related to the watershed from Rinjani Mountain permeated in the form of underwater seepages. The largest seepage was observed in Krakas Beach. The emergence of these seepages may affect water quality and nutrient pollution in the surrounding by which the distribution is mainly induced by the tidal current regime. This study aimed to determine the influence of tidal current on low-temperature groundwater distribution and to analyze the environmental issues resulted from this phenomenon. Flow model and statistical analysis were employed to determine the transport pattern of SGD. The tidal current moved southwestward during the high tidal condition ranging from 0-0.15 cm/s. While tidal current flowed northeastward during the low tidal condition ranging from 0-0.3 cm/s. The temperature fluctuation follows the changes of surface elevation around SGD in which the correlation value between those two parameters reached 63 percent. This proves that the cold-water transportation depends on the fluctuation of tidal current (tidal pumping), resulting in the imbalanced ecosystem, especially during the high tidal condition when a greater water mass transport takes place.AbstrakKeluaran Air Tanah Lepas Pantai (KALP) telah ditemukan di utara Pulau Lombok. Fenomena ini sangat dipengaruhi oleh daerah aliran air Gunung Rinjani yang meresap dalam bentuk rembesan bawah air. Rembesan terbesar diketahui berada di Pantai Krakas. Kemunculan rembesan ini mungkin berdampak pada kualitas perairan dan polusi nutrien di sekitarnya yang mana distribusinya sangat dipicu oleh pengaruh arus pasang surut. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh dari arus pasang surut terhadap distribusi air dingin dan menganalisis masalah lingkungan akibat dari kondisi tersebut. Arus pasang surut bergerak menuju barat daya saat kondisi pasang berkisar antara 0-0,15 cm/s, sedangkan arus pasang surut bergerak menuju timur laut pada kondisi surut berkisar antara 0-0,32 cm/s. Fluktuasi suhu mengikuti perubahan elevasi muka air di lokasi KALP dimana nilai korelasi dari kedua parameter tersebut mencapai 63 persen. Hal ini membuktikan bahwa transpor air dingin bergantung pada fluktuasi arus pasang surut, menyebabkan ketidakseimbangan ekosistem, khususnya pada kondisi pasang ketika mekanisme transpor masa air yang lebih besar sedang berlangsung.
Sandfish (Holuthuria scabra) Fisheries in Saleh Bay: Stock Status Based on Fishermen's Perception and Catches [Perikanan Teripang Pesisir (Holuthuria scabra) Teluk Saleh: Status Stok berdasarkan Persepsi Nelayan dan Hasil Tangkapan] Neri Kautsari; Etty Riani; Djamar TF Lumbanbatu; Sigid Hariyadi
Jurnal Ilmiah Perikanan dan Kelautan Vol. 11 No. 2 (2019): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v11i2.13432

Abstract

AbstractThe exploitation of sandfish (Holuthuria scabra) in Saleh Bay is so far not well managed. Consequently, over-fishing and species extinction of sea cucumbers emerge. Currently, information related to the supply of sandfish (H. scabra) is very limited. The purpose of this research was to investigate the stock status of sandfish (H. scabra) based on the fishermen's perception and fish capture information. This research was carried out in the Saleh Bay coast, Sumbawa District, West Nusa Tenggara. The method used was a semi-closed interviews with the scope of fishermen's demography, methods, efforts and catches, and fishermen's perception of the stock condition, conducted by a total of 39 respondents. The result of this research showed that sea cucumber fishermen consisted of male and female with a ratio of 46 : 54, age ranged between 26-59 years old, all were married; education level between unschooled to senior high school; fishermen were from Bajo tribe (37%), Bugis (25%), Samawa (5%) and Mandar (33%). Sea cucumbers were caught by hands for 5-6 weeks (1-4 hours per day), CPUE ranges between 2 to 25 kg (wet weight). The main reason for capturing sea cucumber was because of the ease of method (97%). 84% of the fishermen stated that sea cucumber stock in Saleh Bay declined. The research cocluded the fishermen on Saleh Bay assumed that sandfish (H. scabra) had decreased in stock.AbstrakEksploitasi teripang pasir (Holuthuria scabra) di perairan Teluk Saleh terus dilakukan tanpa adanya pengelolaan sehingga memacu terjadinya kelebihan tangkap dan bahkan bisa menyebabkan kepunahan spesies teripang pasir. Kurangnya ketersediaan informasi dan data terkait stok menyebabkan sulitnya pengelolaan teripang pasir (H. scabra) di perairan Teluk Saleh ke depannya. Tujuan dari penelitian ini adalah untuk mengetahui staus stok teripang pasir (H. scabra) berdasarkan persepsi nelayan dan gambaran hasil tangkapan. Lokasi penelitian yaitu di pesisir wilayah perairan Teluk Saleh, Kabupaten Sumbawa, Nusa Tenggara Barat. Metode yang digunakan ialah wawancara semi tertutup dengan menggunakan kuesioner. Aspek yang dikaji dalam wawancara terdiri dari : 1) demografis nelayan; 2) metode, upaya dan hasil tangkap serta 3) persepsi nelayan terhadap kondisi stok. Responden dalam penelitian ini ialah nelayan penangkap teripang yang berada di pesisir Teluk Saleh. Jumlah responden adalah 39 orang. Hasil penelitian menunjukkan bahwa penangkap teripang pasir terdiri dari laki-laki dan perempuan dengan rasio 46 : 54%, usia berkisar antara 26-59 tahun, nelayan berstatus telah menikah, tingkat pendidikan nelayan mulai dari tidak bersekolah hingga SMU, nelayan berasal dari suku Bajo (37%), Bugis (25%), Samawa (5%) dan Mandar (33%). Penangkapan teripang dilakukan menggunakan tangan, penangkapan dilakukan 5-6 minggu-1 (1–4 jam hari-1), CPUE ialah 2 hingga 25 kg (berat basah), alasan utama nelayan (97%) menangkap teripang pasir adalah kemudahan metode penangkapan, 84% nelayan menyatakan bahwa stok teripang pasir di Teluk Saleh mengalami penurunan. Kesimpulan dari penelitian ialah sebagian besar nelayan Teluk Saleh menganggap bahwa teripang pasir (H. scabra) telah mengalami penurunan stok.
Continuously Dynamic Mixing (CDM) Method and Greenhouse Salt Tunnel (GST) Technology for Sea Salt Production throughout the Year [Metode Continuously Dynamic Mixing (CDM) dan Teknologi Greenhouse Salt Tunnel (GST) Untuk Produksi Garam Sepanjang Tahun] Andi Kurniawan; Muhammad Imam Syafi'i; Gatot Ardian; Abdul Aziz Jaziri; Abd. Aziz Amin; Budiyanto Budiyanto; M. Amenan; Lutfi Ni'matus Salamah; Wahyu Budi Setiawan
Jurnal Ilmiah Perikanan dan Kelautan Vol. 11 No. 2 (2019): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v11i2.13480

Abstract

AbstractOne of the biggest challenges in sea salt production is unpredictable and unsuitable weather. Sea salt production process is very depended on the evaporation rate of sea salt production and it will be stopped in the rainy season. One of the alternative strategies to solve this problem is the application of greenhouse salt crystallization in sea salt production. This study aims to develop the technology to produce sea salt in the rainy season by applying Continuously Dynamic Mixing Method (CDM) in the Greenhouse Sea Salt Tunnel (GST). The application of CDM in the GST is an original innovation developed by the researchers of this study. Environmental parameters analyzed in the present study were daily temperatures, wind speed, evaporation rate, humidity, and Baumé scale value. The quality of the produced sea salt was evaluated from the water and NaCl content. The results of this study indicate that the application of the CDM method in GST makes the sea salt production from the raw water materials (± 2° Be) can be conducted in the rainy season. The optimum water and NaCl content of the produced sea salt is 98.05 % and 7 %, respectively. The production of sea salt for one cycle (15 days) in this study is 300 kg/GST-Crystallization (44 m2). According to the results, the CDM method in the GST technology may improve the production of the sea salt in the rainy season and allow it to produce sea salt throughout the year.AbstrakSalah satu tantangan terbesar dalam produksi garam adalah kondisi cuaca yang tidak menentu ataupun tidak mendukung proses pengkristalan garam. Proses pembuatan garam yang sangat tergantung pada laju evaporasi membuat produksi garam akan berhenti pada musim hujan. Strategi pengoptimalan laju evaporasi dengan menggunakan rumah kristalisasi garam berkembang menjadi salah satu alternatif metode untuk mengatasi permasalahan tersebut. Studi ini bertujuan untuk mengembangkan teknologi produksi garam di musim hujan dengan menerapkan metode Continuously Dynamic Mixing (CDM) pada rumah kristalisasi berbentuk Greenhouse Salt Tunnel (GST). Penerapan metode CDM dalam teknologi GST merupakan inovasi teknologi yang dikembangkan khusus oleh peneliti dalam studi ini. Parameter lingkungan yang diteliti terdiri dari suhu harian (air dan udara), kecepatan angin, laju penguapan, kelembaban udara dan nilai skala Baumé dari air bahan baku garam. Kualitas produksi garam dievaluasi berdasarkan kandungan air dan kandungan NaCl. Hasil penelitian ini mengindikasikan kalau penerapan metode CDM pada GST membuat produksi garam yang dimulai dari air muda (± 2° Be) dapat dilakukan pada musim hujan. Garam yang dihasilkan berwarna putih dengan kandungan NaCl dan kadar air, secara berturut-turut, adalah 98.05 % dan 7 %. Hasil produksi garam per siklus produksi dalam musim hujan (15 hari) sebesar 300 kg/GST-Kristalisasi (luasan 44 m2). Berdasarkan hasil penelitian, metode CDM pada teknologi GST membuat produksi garam pada musim hujan sehingga produksi garam dapat dilakukan sepanjang tahun.
Food Preference of Shortfin Scad (Decapterus macrosoma) at the Southern Waters of Gunungkidul Yogyakarta, Indonesia [Preferensi pakan ikan layang deles (Decapterus macrosoma) di Pantai Selatan Gunungkidul Yogyakarta] Friyuanita Lubis; Ratih Ida Adharini; Eko Setyobudi
Jurnal Ilmiah Perikanan dan Kelautan Vol. 11 No. 2 (2019): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v11i2.13927

Abstract

AbstractThe food habit is one of the important information used in the fisheries resource management. This study aimed to determine food preferences, index of preponderance, and trophic level of shortfin scad (D. macrosoma) captured from the southern waters of Gunungkidul Yogyakarta, Indonesia. A total of 325 fish samples were collected from March to September 2018. Each fish sample was measured in total length, body weight, determined its sex, and then dissected. The digestive tract was measured in total length then the gut contents were preserved in 5% formaldehyde to observe the type of food composition. The results showed that shortfin scad was carnivorous fish (relative gut length = 0.47) with the diet composing of fish (84.15%), phytoplankton (8.91%), zooplankton (4.47%), and snipping shrimp (3.19%). The molecular identification showed that the main fish species eaten by shortfin scad was Cololabis saira (Scomberesocoidae).AbstrakKebiasaan pakan ikan merupakan salah satu informasi penting yang digunakan dalam manajemen sumberdaya perikanan. Penelitian ini bertujuan untuk mengetahui preferensi pakan, indeks bagian terbesar dan tingkat trofik ikan layang deles (D. macrosoma) yang ditangkap dari Perairan Gunungkidul. Total 325 sampel ikan layang deles dikumpulkan selama bulan Maret sampai dengan September 2018. Setiap sampel ikan diukur panjang total, berat tubuh, ditentukan jenis kelaminnya kemudian dilakukan pembedahan. Saluran pencernaan diukur panjangnya, kemudian isi lambung ikan diawetkan dalam formalin 5% untuk diamati komposisi jenis makanannya. Analisis data meliputi panjang usus relatif, frekuensi kejadian, indeks bagian terbesar, dan tingkat trofik ikan layang deles. Hasil penelitian menunjukkan bahwa ikan layang deles bersifat karnivora (panjang usus relatif = 0,47) dengan komposisi jenis makanan utama adalah ikan (84,15%). Makanan pelengkap layang deles adalah fitoplankton (8,91%), sedangkan zooplankton (4,47%) dan potongan udang (3,19%) merupakan makanan tambahan. Berdasarkan identifikasi molekuler, spesies ikan yang menjadi makanan utama ikan layang deles adalah Cololabis saira (Scomberesocoidae).
Utilization of Paku Uban (Nephrolepis biserrata) Extract as a Molting Stimulant of Mud Crabs (Scylla spp.) in Traditional Ponds Diana Maulianawati; Rukisah Rukisah; Awaludin Awaludin; Muhammad Iswan Guntur
Jurnal Ilmiah Perikanan dan Kelautan Vol. 12 No. 1 (2020): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v12i1.14053

Abstract

HighlightsThe Paku Uban (Nephrolepis biserrata) was identified and analyzedThe ability of paku uban to stimulated molting process of Scylla sp was analyzedThe paku uban (Nephrolepis biserrata) could increase the presentation of molting and accelerate molting processAbstractMud crab (Scylla spp.) is a fishery commodity with high economic value. For this reason, efforts to increase production are required with a more effective applicative technology. This study aims to determine the molting response and survival rate of mud crabs injected with paku uban leaf  extract (N. biserrata) at different doses. The study was conducted for 30 days, located in Tibi Island, Tanah Lia District, Tanah Tidung. The design used in this study was a completely randomized design (CRD) with five treatments and eight replicates. Mud crabs weighing 80 - 150 g were tested in K1 (without injection), K2 (controlled injection), P1 (100 ppm extract), P2 (125 ppm extract) and P3 (150 ppm extract). The effectivity of paku uban (N. biserrata) extract with the highest percentage of molting of 50% took place at P3, 37.5% at P2, and 25% at P1. The lowest levels of molting percentage were at K1 and K2 by 0%. The fastest molting period was ten days at P2, and the longest was 29 days at P1. The highest weight growth reached 33.75 g at P3, followed by P2 and P1 with 31 and 18.75 g, respectively. The survival rate of mud crabs for all treatments reached 100%. The results of the analysis of variance indicated a significant bet effect (P < 0.05) on the molting and weight growth percentage. The BNT test suggested that a dose of 150 ppm was the optimum treatment. 
The Correlation of Coral Reef Cover and Rugosity with Coral Reef Fish Density in East Java Waters Wahyu Andy Nugraha; Faizun Mubarak; Eko Husaini; Hasyim Evendi
Jurnal Ilmiah Perikanan dan Kelautan Vol. 12 No. 1 (2020): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v12i1.14356

Abstract

HighlightsCoral cover, rugosity, and reef fish abundance was determinedThe relationship between coral cover and rugosity and fish abundance was analyzed.Coral cover in East Java were categorized as medium – good.The rugosity index and the fish abundance were highest in Bangsring Waters.There are no relationships between coral cover and fish abundance, but there is relationship between rugosity and fish abundance.AbstractA coral reef is one of the most complex and specific ecosystems in a tropical area. It is identified by its high productivity and biodiversity. This research aims to discover the percentage of coral reef cover and rugosity, as well as the fish abundance in several locations in East Java, Indonesia. In addition, this research aims to investigate the correlation of coral reef cover and rugosity with the density of coral reef fish. This research was conducted in three locations, i.e., Bangsring Waters of Wongsorejo District, Banyuwangi Regency; Gili Noko Bawean Island, Gresik Regency; and Kramat Island, Gili Genting District, Sumenep Regency. This research employed the Line Intercept Transect (LIT) method to calculate the percentage of coral reef cover, the Chain Intercept Transect (CIT) method to determine the coral reef rugosity, and the Belt Transect method to estimate the fish abundance. From this research, it was revealed that the highest coral reef cover was in Bawean waters, while the highest rugosity was in Bangring waters. In addition, the highest coral reef fish density was in Bangsring waters. Meanwhile, the coral reef fish density did not correlate with the percentage of coral reef cover. In contrast, it correlated with the coral reef rugosity. 

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