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All Journal ILMU KELAUTAN: Indonesian Journal of Marine Sciences BULETIN OSEANOGRAFI MARINA Journal of Marine Research Jurnal Kelautan Tropis JFMR (Journal of Fisheries and Marine Research) Journal of Tropical Marine Science

Gunawan Widi Santosa

Program Studi Ilmu Kelautan Jurusan Ilmu Kelautan, Fakultas Perikanan Dan Ilmu Kelautan, Universitas Diponegoro. Jl. Prof. Soedharto SH, Tembalang, Semarang. 50275.Telp. (024)7474698, 085640565065, Email Sriyulinawulandari@yahoo.com

Author-ID : 370652

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Engineering Environmental Science

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Pengaruh Rendahnya Intensitas Cahaya Terhadap Caulerpa racemosa (ForsskÃ¥l) 1873 (Ulvophyceae:Caulerpaceae) Sitorus, Elfonso Robby; Santosa, Gunawan Widi; Pramesti, Rini
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

ABSTRAK: Caulerpa racemosa merupakan spesies rumput laut hijau (Chlorophyta) yang hidup di daerah pasang surut maupun daerah yang bebas dari pasang surut. Permintaan pasar yang setiap tahun meningkat, sehingga dilakukan budidaya. Penelitian ini bertujuan untuk mengetahui pengaruh intensitas cahaya yang berbeda pada pertumbuhan C. racemosa. Penelitian ini menggunakan metode eksperimental laboratoris dan rancangan percobaan yang dipakai adalah Rancanagan Acak Lengkap (RAL) yang terdiri dari 3 perlakuan dan 2 ulangan. Perlakuan pada penelitian ini dengan intensitas cahaya pada A= Â± 1000 lux; B= Â± 500 lux; C= Â± 300 lux. Pencapaian berat basah rata-rata sebagai berikut: A= Â± 0,84 gram ; B= Â± 1,06 gram ; C= Â± 1,13 gram. Laju Pertumbuhan Spesifik (SGR) C. racemosa adalah: A= 1,29 Â± 0,04% per hari ; B= 1,12 Â± 0,06% per hari ; C= 0,4 Â± 0,09% per hari. Hasil penelitian menunjukkan perlakuan intensitas cahaya yang berbeda berpengaruh sangat nyata terhadap berat dan laju pertumbuhan spesifik C. racemosa (p<0,01).Â ABSTRACT: Caulerpa racemosa is a species of green seaweed (Chlorophyta) that live in tidal areas and areas free from tides. The market demand of C. racemosa continues to increase, it is necessary to conduct cultivation for its production. The purpose of this research was to determine the effect of different light intensities on the growth of C. racemosa. This research used an experimental laboratory method and the experimental design used was a Completely Randomized Design (CRD) consisting of 3 treatments and 2 replications. The treatment in the research was by measuring the light intensity at A = Â± 1000 lux; B = Â± 500 lux; C = Â± 300 lux. The results showed that the average wet weight gained was : A = Â± 0.84 gram ; B = Â± 1.06 gram ; C = Â± 1.13 grams. Specific growth rates of C. racemosa were: A = 1.29 Â± 0.04% per day ; B = 1.12 Â± 0.06% per day ; C = 0.4 Â± 0.09% per day. The results of this study indicated that the treatment of different light intensities significantly affected the specific weight and grow rate of C. racemosa (p < 0.01).

Pengaruh Konsentrasi Asam Klorida (hcl) Terhadap Mutu Alginat Rumput Laut Coklat Sargassum sp. dari Perairan Teluk Awur Kab. Jepara Dan Poktunggal Kab. Gunungkidul Rifandi, Raditya Ahmad; Santosa, Gunawan Widi; Ridlo, Ali
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Rumput laut merupakan sumber daya hayati laut yang potensial digunakan dalam industri pangan dan non pangan, salah satu jenisnya ialah Sargassum sp. yang ditemukan melimpah hampir di seluruh perairan Indonesia dan telah dimanfaatkan berupa alginat yang dalam industri digunakan sebagai pengental, pensuspensi, penstabil, pembentuk film, pembentuk gel, dan bahan pengemulsi. Penelitian ini bertujuan untuk mengetahui pengaruh konsentrasi HCl terhadap kualitas Natrium alginat rumput laut coklat Sargassum sp. yang diambil dari Perairan Teluk Awur, Jepara dan perairan Poktunggal, Gunungkidul yang meliputi rendemen, viskositas, kadar air dan kadar abu. Metode penelitian yang digunakan adalah metode eksperimental laboratorium dengan Rancangan Acak Lengkap (RAL). Sampel diekstraksi dengan perlakuan perbedaan konsentrasi HCl 3%, 5%, 7% dan 9% saat pembentukan asam alginat masing-masing dengan 3 ulangan. Hubungan antara konsentrasi HCl dan kualitas natrium alginat menunjukan model regresi linier positif untuk rendemen natrium alginat, model regresi polinomial positif untuk viskositas, regresi linier positif dan negatif pada kadar air, lalu regresi polinomial negatif pada kadar abu. Hasil penelitian menunjukkan rendemen natrium alginat tertinggi dihasilkan pada konsentrasi HCl 9% yaitu sebesar 15,41 Â± 2,17% untuk perairan Teluk Awur dan 14,44 Â± 2,94% untuk perairan Poktunggal. Viskositas tertinggi dihasilkan pada konsentrasi HCl 5% yaitu sebesar 10,33 Â± 1,52 cPs untuk perairan Teluk Awur dan 12,65 Â± 1,48 cPs untuk perairan Poktunggal

Ekologi Rumput Laut di Perairan Tanjung Pudak Kepulauan Karimunjawa, Jawa Tengah Khudin, Miftah; Santosa, Gunawan Widi; Riniatsih, Ita
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Penelitian mengenai struktur komunitas rumput laut ini dilakukan di Perairan Tanjung Pudak Pulau Karimunjawa. Penelitian ini bertujuan untuk mengetahui kondisi ekologi rumput dan struktur komunitas di Perairan Tanjung Pudak Pulau Karimunjawa. Pengumpulan data dilakukan bulan Mei 2016 pada lima stasiun menggunakan transek kuadran ukuran 50x50cm dengan interval antar stasiun 25 meter. Hasil penelitian menunjukkan bahwa selama penelitian ditemukan 7 spesies yang terbagi atas 2 divisi. Chlorophyta (3 spesies) dan Phaeophyta (4 spesies). Nilai keanekaragaman yang ditemukan berkisar antara rendah hingga sedang. Nilai keseragaman yang ditemukan berkisar sedang hingga tinggi, sedangkan nilai dominansi yang ditemukan berkisar rendah hingga sedang. Faktor yang mempengaruhi persebaran rumput laut adalah cahaya, suhu, salinitas dan jenis substrat. Kondisi komunitas rumput laut di perairan Tanjung Pudak, Pulau Karimunjawa masih tergolong baik, karena semua parameter kualitas air yang telah diukur memenuhi syarat bagi pertumbuhan optimum rumput laut kecuali kandungan nitrat dan fosfat.Â This research was conducted in Tanjung Pudak waters, Karimunjawa Island, Central Java. The purpose of this research was to determine the ecological condition and community structure of seaweed in Tanjung Pudak waters. The data were collected on May 2016 in five stations, using the 50x50 cm-sized quadrant transect with 25 meters interval between each stations. The results showed that during the study found 7 species were divided into 2 divisions. Three species of Chlorophyta and four species of Phaeophyta. Diversity values were found in range from low to moderate. Uniformity values were found to be moderate to high, while dominance values were found in range from low to moderate. Factors that influence the distribution of seaweed are light, temperature, salinity and type of substrate. The condition of the seaweed community in the waters of Tanjung Pudak, Karimunjawa Island is still relatively good, because all measured water quality parameters qualify for optimum growth of seaweed except the content of nitrate and phosphate.

Metode Lepas Dasar dengan Net Bag pada Pertumbuhan Kappaphycus alvarezii (Doty) Wibowo, Ichsan Suryo; Santosa, Gunawan Widi; Djunaedi, Ali
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

ABSTRAK: Parameter keberhasilan dari kegiatan budidaya rumput laut diukur berdasarkan dari hasil produksi thallus yang dibudidayakan. Metode budidaya yang digunakan dalam kegiatan budidaya rumput laut merupakan salah satu faktor penting yang dijadikan sebagai acuan keberhasilan. Penelitian ini bertujuan untuk mengkaji pertumbuhan dari rumput laut K. alvarezii yang dibudidayakan dengan metode lepas dasar menggunakan net bag yang dimodifikasi. Materi yang digunakan dalam penelitian ini adalah bibit rumput laut K. alvarezii (F2) yang diperoleh dari pembudidaya di Perairan Pulau Kemujan, Kepulauan Karimunjawa. Metode penelitian yang digunakan adalah eksperimen dengan rancangan percobaan berpola Rancangan Acak Lengkap. Perlakuan yang diujikan adalah rumput laut K. alvarezii yang dibudidayakan dengan perlakuan A (satu lapis jaring), perlakuan B (dua lapis jaring), dan perlakuan C (tiga lapis jaring). Penanaman bibit dilakukan selama 42 hari sejak penanaman. Parameter pengamatan meliputi laju pertumbuhan spesifik dan parameter kualitas perairan. Hasil penelitian menunjukkan terdapat pengaruh sistem budidaya lepas dasar menggunakan net bag (P < 0,05) terhadap laju pertumbuhan spesifik K. alvarezii. Metode net bag dengan satu lapis jaring memiliki pertumbuhan terbaik pada 4,95 Â± 0,70 %g/hari.Â ABSTRACT: The success parameters of seaweed farming activities are measured based on the results of cultivated thallus. The cultivation method used in seaweed farming activities is one of the important factors used as a reference for success. This study aimed to assess the growth of K. alvarezii that was cultivated by employing off bottom method in a modified net bag system. The material used in this study was K. alvarezii (F2) seaweed seeds obtained from cultivators in Kemujan Island, Karimunjawa Islands. The research method used was an experiment with a completely randomized design patterned. The treatments tested were K. alvarezii which was cultivated by treatment A (single net), treatment B (double net), and treatment C (triple net). Planting of seeds was carried out for 42 days after planting. Observation parameters include specific growth rate and water quality parameters. ANOVA test results showed that there was a significant influence (P <0.05) on the absolute weight and specific growth rate of K. alvarezii. Results showed that single net bag method given the best growth rate at 4.95 Â± 0.70 %g/day.

Kadar Total Lipid Mikroalga Nannochloropsis oculata Hibberd, 1981 (Eustigmatophyceae : Eustigmataceae) Berdasarkan Perbedaan Salinitas dan Intensitas Cahaya Arihanda, Dea Davita Putri; Suryono, Suryono; Santosa, Gunawan Widi
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Nannochloropsis oculata merupakan alga yang memiliki kadar lipid tinggi dan mudah dibudidayakan karena hanya bantuan cahaya matahari, karbon dioksida dan air laut mampu berkembang biak dengan baik. Penelitian ini bertujuan untuk mengetahui pengaruh perbedaan salinitas dan intensitas cahaya terhadap pertumbuhan dan kadar total lipid pada mikroalga N. oculata. Penelitian ini dilaksanakan secara laboratoris, dengan Rancangan Faktorial. Perlakuan yang diuji cobakan yaitu A1( Salinitas 33 â€°), A2 (Salinitas 31 â€°), dan A3 (Salinitas 35 â€°), serta B1 (Intensitas Cahaya 500 lux), B2 (Intensitas Cahaya 1500 lux), B3 (Intensitas Cahaya 3000 lux), yang diperbandingkan dengan Perlakuan Kontrol. Setiap perlakuan dilakukan pengulangan sebanyak 3 kali. Hasil analisis pertumbuhan mikroalga N. oculata dan kandungan lipid dilakukan dengan Analisis Sidik Ragam dan dilakukan uji lanjutan Analisis Duncan Multiple Range Test dilaksanakan untuk mengetahui perbedaan perlakuan. Hasil penelitian menunjukkan bahwa pertumbuhan mikroalga N. oculata tertinggi dicapai oleh perlakuan A1B3 (Salinitas 33 â€° dan Intensitas Cahaya 3000 lux) sebesar 19,927x103Â±5,454x103 sel/mLdan A3B1 (Salinitas 35 â€° dan Intensitas Cahaya 500 lux) sebesar 20,779x103 Â± 5,874x103 sel/mL. Pola pertumbuhan mikroalga N. oculata untuk semua perlakuan berbentuk kuadratik. Kandungan lipid mikroalga N. oculata tertinggi dicapai oleh perlakuan A3B1 (Salinitas 35 â€° dan Intensitas Cahaya 500 lux) dengan nilai sebesar 66,5767Â±1,5257 mg/g dan terendah pada perlakuan A3B3 (Salinitas 35 â€° dan Intensitas Cahaya 3000 lux) dengan nilai sebesar 38,2010Â±3,1507 mg/g.Nannochloropsis oculata is one of algae that has high lipid content compared to other algae and is easily cultivated because only the help of sunlight, carbon dioxide and sea water can reproduce well. This aims of the study was to determine the effect of varions salinity and light intensity on the growth and total lipid contents of microalgae N. oculata.Â The method used was an experimental laboratory method with a factorial design. The treatments applied were A1 (Salinity 33 â€°), A2 (Salinity 31 â€°), and A3 (Salinity 35 â€°), and B1 (Light Intensity 500 lux), B2 (Light Intensity 1500 lux), B3 (Light Intensity 3000 lux), which compare to the Control. The Interaction Treatments were applied on three replicates. The microalga N. oculata and Lipid Contents were analysed using Factorial Approach on Variance Analysis. The Duncan Multiple Range Test was applied to show the treatment which influence the difference result. The highest microalga N. oculata growth showed by the treatment of A1B3 (Salinity 33 â€° and Light Intensity 3000 lux) with the number 19,927x103 cells/mL Â± 5,454x103 cells/mL and A3B1(Salinity 35 â€° and Light Intensity 500 lux) with the number 20,779x10 cells/mL Â± 5,874x103 cells/mL. The growth model of N. oculata for all treatments showed a model of quadratic.The highest lipid content of N. oculata showed by the treatment ofA3B1 (Salinity 35 â€° and Light Intensity 500 lux) with the number 66,5767Â±1,5257 mg/g and the lowest on A3B3 (Salinity 35 â€° and Light Intensity 3000 lux) with the number38,2010Â±3,1507 mg/g.

Kecocokan Habitat Bertelur Penyu Sisik Eretmochelys imbricate, Linnaeus, 1766 (Reptilia : Cheloniidae) di Balai Taman Nasional Laut Kepulauan Seribu, Jakarta Rachman, Dodi; Kushartono, Edi Wibowo; Santosa, Gunawan Widi
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Penyu Sisik (Eretmochelys imbricata) adalah penyu yang memiliki ciri khas moncong berbentuk paruh, rahang atasnya melengkung ke bawah dan relatif tajam seperti burung kakak tua sehingga sering disebut â€œHawksbill turtleâ€. Penyu jenis ini adalah pemakan terumbu karang yang tidak sehat sehingga terumbu karang menjadi sehat kembali.Tujuan dari penelitian ini adalah Mengetahui lokasi atau hotspot area peneluran penyu di Pulau Peteloran Timur Balai Taman Nasional Laut Kepulauan Seribu dan Mengetahui karakteristik habitat penyu dalam memilih lokasi bersarang dan bertelur. Metode yang digunakan dalam penelitian ini adalah metode Survey Deskriptif. Pengumpulan data dilakukan dengan cara observasi langsung di lapangan meliputi pengukuran panjang, lebar, dan kemiringan pantai, pengukuran suhu, identifikasi vegetasi pantai, predator dan kelembaban sarang serta pengukuran jenis substrat sarang di laboratorium geologi Universitas Diponegoro. Penentuan stasiun pengamatan menggunakan metode Purposive Random Sampling. Hasil penelitian menunjukkan ditemukannya 2 sarang Penyu Sisik (Eretmochelys imbricata) di bagian sebelah timur pulau dengan total jumlah 390 butir telur. Panjang pantai Pulau Peteloran Timur setiap stasiunnya berkisar 4,80â€“13,20 m,Â lebar pantainya 12â€“19,60 m. Kemiringan pantai Pulau Peteloran Timur mencapai 0,07â€“0,23Â°. Hasil pengukuran suhu berkisar 31â€“34 Â°C. Kadar air sedimen berkisar antara 0,002â€“0,004 %. Ukuran butir pasir Pulau Peteloran Timur didominasi pasir kasar dengan mencapai 48,55%. Vegetasi yang mendominasi adalah Pandan (Pandanus tectorius) selebihnya vegetasi campuran. Predator yang dijumpai di lapangan adalah Biawak (Varanus salvator).Â Hawksbill turtle (Eretmochelysimbricata) is a turtle that has the characteristics of a half-shaped muzzle, its upper jaw is curved downward sharply and often called the "Hawksbill Turtle". This type of turtle is an unhealthy coral reef eater so that the coral reefs are able to maintain its healthy condition.The purpose of this research is to know the location or hotspot area of turtle nesting in the east peteloran, Seribu Archipelago national park and to know the habitat characteristics of turtle in choosing nesting and laying eggs location. The method used in this research was descriptive survey method. The data collection were done by direct observation in a long-distance field by assessing the width, and coastal slope, temperature measurement, predator and humidity of nest and measurement of nest type in the geological laboratory of Diponegoro University. Determination of the location was determined by purposive random sampling method. The results showed 2 Hawksbill nests (Eretmochelysimbricata) in the eastern part of the island had a total of 390 eggs. The length of the East Peteloran Island beach each station ranged from 4.80 to 13.20 m, the beach width of 12-19.60 m. The eastern coastal slope of East Peteloran Island reached 0.07-0.23Â°. The temperature measurements ranged from 31-34Â° C. Sediment air content ranged from 0.002-0.004%. The size of the sand grains of East Peteloran Island was dominated by a sand average of 48.55%. Vegetation that dominates were Pandan (Pandanustectorius) and the others were mixed vegetation. Predator found in the field was monitor Lizards (Varanussalvator).

Pengaruh Konsentrasi KOH yang Berbeda Terhadap Kualitas Alginat Rumput Laut Coklat Sargassum duplicatum J. G. Agardh Anwar, Fauzi; Djunaedi, Ali; Santosa, Gunawan Widi
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Indonesia has plentiful resources and high biological diversity. One of them is brown seaweed Sargassum duplicatum which has potential as source for alginate. Alginate is often used in food and other industry, however extraction method is still becoming handycap to get high quality alginate. The objective of research was to know the effect of different concentration of soaking media KOH on quality of alginate. The method used was laboratory experiment. Design experiment applied was Completely Randomized Design (CRD) with three different concentrations of KOH, namely 0.3%, 0.5%, and 0.7%. Each treatment was repeated three times. The result showed that the highest yield was obtained at 0.3% KOH concentration at 33.63 Â± 2.11%. The highest viscosity was obtained at 0.7% KOH concentration at 23.33 Â± 2.08 cPs. The lowest water content was obtained at 0.7% KOH concentration at 14.71 Â± 0.32%. The ashes content was obtained at 0.7% KOH concentration at 27.82 Â± 0.88%.

Pengaruh Konsentrasi NaOH yang Berbeda Terhadaap Mutu Agar Rumput Laut Gracilaria verrucosa Kusuma, Wakhid Indra; Santosa, Gunawan Widi; Pramesti, Rini
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

ponds in Indonesian. Agar from G. verrucosa is widely used in the food industry, one of which is used as a thickener or stabilizer of food. However, a good quality of agar with high durability needs developed. The purpose of this study with the addition of NaOH before extracted is to determine the effect of different concentrations of NaOH on the agar quality of seaweed G. verrucosa. This study was conducted from July 30 until August 16, 2012 in Plant Tissue Culture Laboratory, Faculty of Science and Mathematics - University of Diponegoro. Sampling was conducted on July 21, 2012. G. verrucosa was obtained from local ponds Tambak Harjo, Krapyak, District of West Semarang - Semarang. The method used was laboratory experimental methods with completely randomized design (CRD) to determine differences in the concentration of NaOH. The results showed that the effect of the concentration of NaOH affected the gel strength, sulphate content, ash content, moisture content, and yield on agar G. verrucosa (p Ë‚ 0,05). The higher the concentration of NaOH the higher gel strength, ash content, water content, and yield, but lowering sulphate levels. The best results obtained in the treatment with NaOH solution concentration of 6 %.

Morfometri Portunus pelagicus Linnaeus, 1758 (Malacostraca : Portunidae) Pada Fase Bulan Yang Berbeda Di Perairan Betahwalang, Demak Putra, Errizal Machmud; Pramesti, Rini; Santosa, Gunawan Widi
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Rajungan (Portunus pelagicus) merupakan komoditas unggulan Indonesia. Perairan Betahwalang, Kabupaten Demak memiliki sumberdaya rajungan yangÂ potensial dengan tingkat eksploitasi yang tinggi. Rajungan ini ditangkap setiap hari tanpa memperhatikan faktor alam berupa fase bulan yang menyebabkan menurunnya populasi. Informasi penangkapan berdasarkan fase bulan diperlukan agar populasi rajungan dapat terjaga. Tujuan Penelitian ini adalah mengkaji jumlah dan sebaran morfometri rajungan yang tertangkap pada fase bulan purnama dan bulan baru di perairan Betahwalang. Penelitian ini dilakukan dari November 2017 sampai Februari 2018 di perairan Betahwalang. Metode penelitian yang digunakan yaitu metode deskriptif. Penentuan lokasi penelitian berdasarkan area penangkapan rajungan di perairan Betahwalang. Pengambilan data dilakukan 8 kali dari tanggal 5 November 2017 sampai 18 Februari 2018. Pengambilan data berupa jumlah, lebar karapas, berat, jenis kelamin rajungan, dan parameter lingkungan. Hasil penelitian menunjukkan total rajungan tertangkap yaitu 448 ekor, 296 ekor pada Bulan Purnama dan 152 ekor pada Bulan Baru. Morfometri rajungan ukuran â‰¤ 10 cm pada Bulan Purnama 190 ekor lebih banyak dari Bulan Baru 90 ekor. Rajungan ukuran > 10 cm pada Bulan Baru 106 ekor lebih banyak dari Bulan Baru 62 ekor.Â Blue Swimming Crab (Portunus pelagicus) is Indonesia's flagship commodity. The waters of Betahwalang, Demak Regancy have potential Blue Swimming Crab resources with high levels of exploitation.Â The crabs are catched every day regardless of natural factors, such as the moon phase that causes the population to decline. Blue Swimming Crab catchâ€™s information based on the moon phase is required for the population to sustaine. The purpose of this research is to study the amount and distribution of Blue Swimming Crab morphometry catched on the full and new moon phase in Betahwalang waters. The study was conducted from NovemberÂ 2017 till February 2018 in the waters of Betahwalang. The research method used was descriptive method. Determination of research location based on Blue Swimming Crab catching area in Betahwalang waters. The data were collected 8 times from November 5, 2017 till February 18, 2018. Data were collected in number, width of carapace, weight, sex, and environmental parameters. The results showed total of catched crabs, were 296 crabs on Full Moon, and 152 crabs on New Moon. Blue Swimming Crab morphometry size â‰¤ 10 cm on Full Moon was 190 crabs more than New Moon was 90 crabs. Then, in Size> 10 cm on New Moon was 106 crabs more than New Moon was 62 crabs.

Studi Herbivori Rumput Laut Kappaphycus alvarezii (Doty) Doty oleh Ikan Baronang Siganus sp. pada Salinitas yang Berbeda Framegari, Vera; Nirwani, Nirwani; Santosa, Gunawan Widi
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Kappaphycus alvarezii is one of seaweed species widely cultivated for producing high economic value carrageenan as raw material for pharmaceutical, cosmetic, food, etc.. During the cultivation of this seaweed there are some constrains found that is by fish herbivory by rabbitfish (Siganus sp.). One of factors thought to affect fish herbivory rabbitfish on seaweed is the salinity. Therefore, there is a need to conduct observation on Siganus sp. Herbivory at different levels of salinity. This research used Completely Randomized Design (CRD) with 5 treatments with 3 replications, namely were the treatment A (salinity 28 ppt), treatment B (30 ppt salinity), treatment C (salinity 32 ppt), treatment D (34 ppt salinity), and treatment E (salinity 36 ppt). Data were analyzed statistically with one-way ANOVA using SPSS software. The results showed that the salinity treatment gave a very significant influence (P <0.01) of seaweed herbivory K. alvarezii by rabbitfish. The results of this study were showed that the total weight of seaweed eaten by rabbitfish during the maintenance period of 30 days were: treatment A = (149.19 g), treatment B = (191.17 g), treatment C = (298.12 g), treatment of D = (212.87 g) and treatment E = (89.15 g). Body weight of fish at the end of the study were: treatment A (33.93 Â± 6.35 g), treatment B (34.51 Â± 4.34 g), treatment C (49.79 Â± 5.67 g), treatment D (33.44 Â± 14.12 g) treatment E (32.44 Â± 2.72 g).

Co-Authors AB Susanto Agus Dermawan Akmal Nasrulloh Ali Djunaedi Ali Djunaedi Ali Djunaedi Ali Djunaedi Ali Ridlo Angelina Yusniar Christanty Sihotang Antonius Budi Susanto Arihanda, Dea Davita Putri Atiqoh, Lailatul Bambang Yulianto Christian Jimmy Dea Davita Putri Arihanda Delianis Pringgenies Desy Lasri Ana Dieng Widawati Dodi Rachman Edi Wibowo Kushartono Elfonso Robby Sitorus Endang Supriyantini Endarwantti, Vionita Errizal Machmud Putra Ervia Yudiati Faiz Naida Salimah Fauzi Anwar Fauzi Anwar Girsang, Putri Hutari Hadi Endrawati Ichsan Suryo Wibowo Ihsan Mahfudh Irwani Irwani Ita Riniatsih Jusup Suprijanto Karla Lutfia Rahmadanti Ken Suwartimah Khajar Imaniar Khudin, Miftah Kristama Setiaji Kristama Setiaji Ladies Nikita Alamanda Lailatul Atiqoh Mahfudh, Ihsan Maria Ulfa Ramadhanty Miftah Khudin Muhammad Raihan Faqiha Bintang Azzura Narendra Prasidya Wishnu Nasrulloh, Akmal Nevanda Kusuma Wardani Ni'mah, Ulin Nirwani Nirwani Nirwani Nirwani Nirwani Soenardjo Putra, Errizal Machmud Rachman, Dodi Raditya Ahmad Rifandi Radityo Haris Ramadhanty, Maria Ulfa Retno Hartati Ria Azizah Rini Pramesti Rotua Malau Sihotang, Angelina Yusniar Christanty Sitorus, Elfonso Robby Sri Yulina Wulandari Subiakto, Achmad Yusuf Sunaryo Sunaryo Sunaryo Sunaryo Suryono Suryono Ulin Ni'mah Vera Framegari Vera Framegari Vivian Ayu Cyntya Wahyu Bagio Leksono Wahyu Febrianto Wakhid Indra Kusuma Wandha Stephani, Wandha Wibowo, Ichsan Suryo Wilis Ari Setyati

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