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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) - Ilmu Bumi dan Planet (Lain-Lain)
Articles 563 Documents
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Status dan sebaran mangrove di kawasan konservasi Taman Pulau Kecil, Kabupaten Tapanuli Tengah, Provinsi Sumatera Utara Ahmad Muhtadi; Zulham Apandy Harahap; Ahyar Pulungan; Nurmatias Nurmatias; Pardamean Lubis; Zufriwandi Siregar; Rudolf Y. Ompusunggu; Fauzan Aulia
Depik Vol 9, No 2 (2020): August 2020
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.9.2.15065

Abstract

Mangroves are an important part of determining conservation areas as well as determining zoning within conservation areas. Therefore, information on the status and distribution of mangroves is essential in managing conservation areas. This study was conducted in Taman Pulau Kecil, Central Tapanuli District. The data was collected in June 2019. The sampling sites consisted 26 points (1-15 at the Mursala Island and its surroundings and 16-27 in the Tapian nauli Bay (maindland)). The study revealed 17 mangrove species from 9 families consisted of 14 true mangroves and 3 associated mangroves namely pandan (Pandanus tectorius), waru (Thespesia populnea), and ketapang (Terminalia catappa). Analysis of the importance of mangrove species in Taman Pulau Kecil, Central Tapanuli district showed that Rizophora, Xilocarpus, and Bruguiera have a large influence and role in the mangrove vegetation community. Mangroves in conservation area at Taman Pulau Kecil were in the good category. However, the condition and status of mangroves in Tapian Nauli Bay had better condition with the density of 3.120 ind/ha while in Mursala  Island and its surroundings with density of 2.356 ind/ha.Keywords: Mangrove, Marine Protected area, Mursala Island, Tapian Nauli BayABSTRAKMangrove merupakan salah satu ekosistem penting dalam penentuan kawasan konservasi serta dalam penentuan zonasi di dalam kawasan konservasi. Oleh karena itu, informasi status dan sebaran mangrove penting dalam upaya pengelolaan kawasan konservasi. Lokasi pengambilan data mangrove di kawasan konservasi daerah Taman Pulau Kecil Kabupaten Tapanuli Tengah. Pengambilan data dilakukan pada bulan Juni 2019. Lokasi pengambilan data pada 26 titik pengamatan yang terdiri dari titik 1-15 di Pulau Mursala dan sekitarnya dan titik 16-27 di Teluk Tapaian Nauli (pulau sumatera). Hasil penelitian ditemukan 17 spesies mangrove dari 9 famili. Jenis mangrove tersebut terdiri dari 14 mangrove sejati dan 3 mangrove ikutan yaitu pandan (P. tectorius), waru laut (Thespesia populnea), dan ketapang (Terminalia catappa). Analisis nilai penting jenis mangrove di KKPD Taman Pulau Kecil Tapanuli Tengah menunjukkan bahwa Rizophora, Xilocarpus, dan Bruguiera memiliki pengaruh dan peran yang besar dalam komunitas vegetasi mangrove. Mangrove di KKPD Taman Pulau Kecil Tapanuli Tengah termasuk kategori baik. Namun kondisi dan status mangrove di Teluk Tapian Nauli lebih baik dengan kerapatan rata-rata 3,120 ind/ha dibanding di Pulau Mursala dan sekitarnya dengan kerapatan rata-rata 2,356 ind/ha.Kata kunci: Mangrove, Kawasan konservasi perairan, Pulau Mursala, Teluk Tapian Nauli
Kajian awal kadar merkuri (Hg) dalam ikan dan kerang di Teluk Kao, Pulau Halmahera Edward Edward
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.6.3.7748

Abstract

The aim of the study was to determine the concentration of Hg  in some species of fish and mussels harvested from Kao Bay . Fish and mussels samples were purchased from fishermen at Kao Bay  in November 2015. The Hg concentration was measured by using Atomic Absorption Spectrophotometer (AAS).The results showed that the highest concentration of Hg was found in gurara fish (Nemipterus japonicus)  that is 0.98 ppm, followed by suo fish  (Sphyraena jello)  0.89 ppm,  tatameri fish (Gazza minuta)  0.38 ppm, gaca fish (Lutjanus argentimaculatus) 0.31 ppm, totodi fish (Synodus foetens)  0.24 ppm,  bubara fish (Caranx sp) 0, 19 ppm, ngafi fish (Stolephorus indicus) 0.19 ppm and biji nangka fish (Upeneus vittatus) 0.15 ppm. In the shelfish meat, the highest concentration of Hg is found in the blood mussels (Anadara granosa), that is 0.42 ppm, and then followed by papaco (Telescopium telescopium) 0.05 ppm. The concentration of Hg in all samples of fish and shelfish were below from the threshold value for seafood fish and shellfish of 0.5 ppm and 1.0 ppm, respectively.Penelitian ini bertujuan untuk mengetahui kadar Hg dalam beberapa jenis ikan dan kerang yang ada di Teluk Kao dalam kaitannya dengan kesehatan makanan hasil laut. Contoh ikan dan kerang di beli dari nelayan di Teluk Kao pada bulan November 2015. Kadar Hg  diukur dengan menggunakan Spektrofotometer Serapan Atom (AAS). Hasilnya menunjukkan kadar Hg tertinggi dalam ikan dijumpai dalam daging ikan gurara (Nemipterus japonicus) yakni 0,98 ppm, selanjutnya diikuti oleh ikan suo (Sphyraena jello) 0,89 ppm, ikan tatameri (Gazza minuta) 0,38 ppm, ikan gaca (Lutjanus argentimaculatus) 0,31 ppm, ikan totodi (Synodus foetens) 0,24 ppm, ikan bubara (Caranx sp) 0,19 ppm, ikan ngafi (Stolephorus indicus)  0,19 ppm, dan ikan biji nangka (Upeneus vittatus) 0,15 ppm. Dalam daging kerang kadar Hg tertinggi dijumpai dalam kerang darah (Anadara granosa) yakni 0,42 ppm selanjutnya dikuti oleh kerang papaco (Telescopium telescopium) 0,05 ppm. Kadar Hg dalam semua contoh ikan dan kerang masih di bawah nilai ambang batas kadar yang diperkenankan dalam  makanan hasil laut yakni 0,5 ppm untuk ikan dan 1 ppm untuk kekerangan. 
The presence of harmful algae in the coastal waters of Bintan Island, Riau Islands Apriadi, Tri; Melani, Winny Retna; Zulfikar, Andi; Sabriyati, Deni; Muzammil, Wahyu; Pasisingi, Nuralim
Depik Jurnal Ilmu Ilmu Perairan, Pesisir, dan Perikanan Vol 13, No 1 (2024): APRIL 2024
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.13.1.34135

Abstract

Environmental mitigation measures are being undertaken as a proactive approach to prevent the adverse consequences associated with Harmful Algal Blooms (HABs). Presently, there is a lack of comprehensive information regarding the occurrence of HABs in the waters surrounding Bintan Island, and routine monitoring to assess the potential for eutrophication is absent. This research should begin by gathering information about potential sources that contribute to the emergence of HABs, the specific types of algae with the capacity to trigger HABs The primary objective of this study is to identify the harmful algae species present in the coastal waters of Bintan Island. The research was conducted in August 2023, with the sampling process taking place at four specific locations within the coastal waters of Bintan Island. These sampling stations were selected deliberately to capture the varying activities predominant in each respective area. The microalgae found consisted of four groups, namely Bacillariophyta, Cyanophyta, Dinophyta, and Chlorophyta. Bacillariophyta is a group of microalgae with the highest abundance proportion at all observation stations. Harmfull Algae found in the coastal waters of Bintan Island generally come from the Dinophyta group of the types Ceratium sp., Peridinium sp., Prorocentrum sp., and Dinophysis sp. Harmful microalgae from the Dinophyta group were found at all research stations, with the highest proportion of abundance at Station 2 (6%) and the lowest at Station 3 (1%). The difference in these findings is thought to be due to the dynamics of the hydrosanographic parameters of the waters, especially nutrient concentrations.Keywords:BintanCeratiumDinophytaHarmfulMicroalgae
Trophic status analysis and estimation of fish production in Aneuk Laot Lake aquatic resources management, Sabang City Nurfadillah Nurfadillah; Irma Dewiyanti; Sri Riska Rahayu; Siswani Sari; Indri Karina; Hasfiandi Hasfiandi
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.11.3.27499

Abstract

Aneuk Laot Lake is located in Sabang City, Weh Island, Aceh Province. Changes in water quality can affect the life of aquatic organisms found in Aneuk Laot Lake. The purpose of this research estimates fish production and trophic status for the aquatic resource management of Aneuk Laot Lake, Sabang. This research was conducted in September 2019 in Lake Aneuk Laot using the TRIX, TSI (Trophic State Index) and Nygaard index methods to determine fish production and trophic status. Observation stations were determined using stratified random sampling method and analysis of chlorophyll-a was done using the Trichomatic method. The results showed that the waters of Aneuk Laot Lake can be categorized as eutrophic to hypereutrophic. The estimated value of fish production in Aneuk Laot Lake based on the chlorophyll-a approach is 109.84 kg/ha/year, with a lake area of 61.6 ha. Water quality parameters are still in a state that can be tolerated by aquatic organisms in Aneuk Laot Lake.Keywords:Fish production potential Water qualityTRIX indexBiomass productionWater productivity
Survival and growth of Pangasianodon hypophthalmus cultured under controlled photoperiod Cyntia Uli Artha Sihombing; Muhammad Fauzi; Windarti Windarti
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.10.2.20053

Abstract

Changing in photoperiod duration may affects the physiology of nocturnal fish such as Pangasianodon hypophthalmus. A study aims to understand the effects of controlled photoperiod towards survival and growth of P. hypophthalmus has been conducted from June to August 2020. There were 3 treatments applied, namely natural photoperiod, 18 hours dark (18D), and 24 hours dark (24D) with 3 replications in each treatment. The rearing tanks used in this study were 100 L circular plastic tanks.  In 24D treatment, the tanks were placed under dark colored tarp tent continuously.  For the 18D treatment, the tanks were placed under dark tarp tent, but the tent was opened for 6 hours/ day (the tanks were in dark condition for 18 hours/ day), while the control tanks were positioned under natural photoperiod. P. hypophthalmus fingerlings, 6-8 cm TL and   4-5 g BW were used in this study. Thirty fishes were reared in each rearing tank, they were feed with commercial pellets, 2 times/day, at satiation. Fish survival was monitored every day, while samplings for fish growth were conducted weekly for a 8 weeks period. Results indicate that the survival of   fish was 100% in each treatment applied. Fish growth, however, shown differences. The growth of fish reared in 24D and 18D was better than that of the control. By the 9th week,  the fish in 24D was around 70.71g BW with 19.27 cm TL  (daily growth rate 9.35%), while those of the 18D was 69.41 g BW, 18.77 cm TL and 9.29% daily growth rate. The fish reared under natural photoperiod was around 61.95 g BW with 18.19 cm TL and 7.33% of daily growth rate. Data obtained indicate that the application of longer dark is positively improve the growth of P. hypophthalmus.Keywords:Nocturnal FishLight Dark Catfish
Hubungan panjang-berat ikan monacanthus cinensis dan acreichthys tomentosus di Pulau Fair, Tual, Maluku Tenggara Bayu Kumayanjati; Teddy Triandiza; Agus Kusnadi
Depik Vol 8, No 2 (2019): August 2019
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.8.2.10629

Abstract

Abstract. Length-weight relationship analysis is used to determined the pattern of the growth for the fish. Based on this knowledge, field study have been done at the Fair island waters, the district of Tual, in April, June and August 2014, to collect data length and weight of Monacanthus cinensis and Acreichtys tomentosus. The length of the fish is measured using a digital caliper with an accuracy of 0.01 mm and weighed using an analytical balance precision balance ACS - AD 300 with an accuracy of 0.01 g. The number of fish samples analyzed were 288 for M. cinensis and 270 for A. tomentosus, respectively. Based on the analysis of length-weight relationship and condition factor, M.cinensis and A.tomentosus have the same growth pattern, i.e., negative allometric, with b values 2.505 and 2.3195 (b 3), respectively.Value of condition factor were 1.083 - 3.379 for M. cinensis and 1.003 - 4.106 for A. tomentosus, both fish were included in the category of fish that have a slightly flattened body.Keywords: Monacanthus cinensis, Acreichthys tomentosus, length-weight relationship, growth pattern, Fair Island Abstrak. Analisa hubungan panjang berat ikan merupakan analisa untuk mengetahui pola pertumbuhan ikan. Adapun penelitian ini dilakukan pada ikan Monacanthus cinensis dan Acreichthys tomentosus pada bulan April, Juni dan Agustus 2014 di perairan Pulau Fair, Tual, Maluku Tenggara. Ikan hasil tangkapan diukur panjangnya menggunakan digital caliper dengan ketelitian 0,01 mm, dan beratnya menggunakan timbangan analitik ACS precision balance-AD 300 dengan ketelitian 0,01 g. Jumlah ikan sampel yang dianalisa masing-masing sebanyak 288 ekor untuk M. cinensis dan 270 ekor untuk A. tomentosus. Berdasarkan analisa hubungan panjang berat dan faktor kondisi, M. cinensis dan A. tomentosus memiliki pola pertumbuhan yang sama yaitu alometrik negatif dengan nilai b masing-masing sebesar 2,505 dan 2,3195 (b3). Nilai faktor kondisi (Kr) untuk kedua jenis ikan tersebut masing-masing berkisar antara 1,083 – 3,379 untuk ikan M. cinensis dan 1,003 – 4,106 untuk A. tomentosus, keduanya termasuk dalam kelompok ikan yang memiliki bentuk badan yang agak pipih.Kata Kunci: Monacanthus cinensis, Acreichthys tomentosus, hubungan panjang berat, pola pertumbuhan, Pulau Fair
Morfometri Danau Kelapa Gading Kota Kisaran, Kabupaten Asahan Provinsi Sumatera Utara Rizki Ridoan; Ahmad Muhtadi; Pindi Patana
Depik Vol 5, No 2 (2016): August 2016
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.5.2.4913

Abstract

Abstract. Kelapa Gading Lake is an artificial lake located in Asahan of North Sumatera. Data on the lake morphometry is needed to determin the level of water fertility, and to know ability of lake in accepting the pollutant load. The purpose of the study was to examine aspects of the lake morphometry. The research was conducted from February to April 2016. Data collected in this research were depth, water flow, the width of the lake and around the lake. The data were processed using ArcMap. The result showed that Kelapa Gading Lake has an area approximately 11931.37 m2, with the maximum length of 161.14 m, a the maximum width of 124.72 m, and the circumference of 688.50 m. The maximum depth of 2.15 m, with the shape of the lake bottom is flat. The water volume is approximately  15033.52 m3, and the water discharge of about 0.74 to 0.92 L s-1, with a stay of lake water ± 225-226 days, the brightness of the water ranges from 0.37 to 0.48 m with the compensation depth of about  0.98 to 1.07 m, and Kelapa Gading Lake has low stability.Keywords: ArcMap, bathymetric, compensation depth, lake, morphometry Abstrak. Danau Kelapa Gading merupakan danau buatan yang berada di Kabupaten Asahan, Sumatera Utara. Data mengenai morfometri danau sangat diperlukan untuk menentukan tingkat kesuburan perairan dan juga mengetahui seberapa besar kemampuan danau dalam menerima beban pencemar. Tujuan dari penelitian ini untuk mengetahui aspek morfometri danau Kelapa Gading. Penelitian ini dilaksanakan dari Februari-April 2016. Pengambilan  data yang dilakukan dalam penelitian ini adalah data kedalaman, debit air, lebar danau, dan keliling danau. Data-data tersebut diolah dengan menggunakan ArcMap. Hasil penelitian menunjukkan bahwa Danau Kelapa Gading memiliki luas sekitar 11.931,37 m2, dengan panjang maksimum 161,14 m, lebar maksimum 124,72 m, keliling 688,50 m. Kedalaman maksimum 2,15 m, dengan bentuk dasar danau rata. Volume Danau Kelapa Gading adalah 15.033,52 m3, debit air sekitar 0,74-0,92 L/s, dengan masa tinggal air danau ±225-226 hari, kecerahan air berkisar 0,37-0,48 m dengan kedalaman kompensasi sekitar 0,98-1,15 m, dan Danau Kelapa Gading memiliki stabilitas yang rendah dan akan mudah mengalami pengadukan.Kata kunci: ArcMap, batimetri, danau, kedalaman kompensasi, morfometri
Study of the effect of processing techniques on the quality of galantine made from milkfish (Chanos chanos) Panjaitan, Pola Sabar Tumohom; Mukhaimin, Iman; Ratnaningtyas, Susi; Soeprijadi, Liliek; Wulansari, Devi
Depik Jurnal Ilmu Ilmu Perairan, Pesisir, dan Perikanan Vol 12, No 2 (2023): AUGUST 2023
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.12.2.33016

Abstract

Milkfish (Chanos chanos) is one of the commonly consumed fishery commodities in Indonesia. However, diversification of processed products from milkfish, such as pindang (fish brine) and soft bone milkfish, is considered too simple. Whereas, milkfish has a high nutritional content. An innovation to attract more people to consume this highly nutritious commodity is to process it into fish galantine. Milkfish galantine is processed with the basic ingredients of milkfish, bread flour, and eggs that are seasoned then molded and processed at high temperatures. The process of making milkfish galantine includes preparing milkfish as raw materials, scaling and gutting the fish, mincing the milkfish meat, mixing it with other ingredients, molding, and processing. Fish galantine is generally made through high-temperature processing, such as roasting and steaming. Different high-temperature processing techniques can affect the quality of fish galantine. Therefore, this research aimed to assess the effect of milkfish composition and different high-temperature processing techniques: roasting and steaming. The different milkfish galantine formulations in this research were made by giving different proportions of minced milkfish meat as treatments: 5%, 10%, and 15%. After that, galantines were processed by steaming. Furthermore, the formulation with the highest hedonic scale score was duplicated by processing using the roasting technique. The results of the four treatments were then tested for proximate composition, vitamins, and minerals. The results of the hedonic evaluation of milkfish galantines processed by steaming showed that milkfish galantine with 15% fish meat proportion had the highest score. The test results showed that the addition of milkfish meat caused significant differences in water, ash, total fat, carbohydrate, protein, and potassium contents. In addition, the processing technique also caused significant differences in all parameters tested.Keywords:MilkfishFish galantineSteamingRoasting
Biological Aspect of the Grey-eel catfish in Kuala Langsa Estuaries, Aceh Teuku Fadlon Haser; Muh Saleh Nurdin; Fauziah Azmi; Muhammad Fauzan Isma; Suri Purnama Febri; Eddy Supriyono; Siska Mellisa
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.11.2.23498

Abstract

The grey-eel catfish is a highly valued fish species in some parts of Indonesia. The fish is common in brackish water of estuaries, marine and freshwater habitat. They are not are not usually catched in commercial scale because of the limited population in its habitat. Although the status is not evaluated, the fish is predicted facing extinction in several countries. We conducted a study to examine the biological information and reproductive biology of the fish in Kota Langsa to gather information that can be utilize to evaluate reproductive status of the fish in several habitats. Parameters tested in the study includes sex ratio, length-weight relationships, candition factor, size at first maturity fecundity and reproductive potential of the fish. Research results provide information that the fish follows negative allometric model with constant condition factor throughout the study. The catches were relatively young fish which have not reached maturity stage. Fishes in the class sized at 510-550 mm provide the largest contribution to total eggs production. To ensure sustainability of the fish it is advised that the fish must catched at size larger than 550 mm.
Biodiversitas dan sebaran mikroalga berbasis sistem informasi geografis (SIG) di Perairan Selatan Kabupaten Malang, Jawa Timur Umi Zakiyah; Mulyanto Mulyanto
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.9.3.17772

Abstract

The coastal region is a meeting point of land and sea. The coastal area utilization has developed intensively, which causes the sustainability or capacity of coastal ecosystems, and the pollution potential in this area exceeded due to various human activities. This condition affects the existence of microalgae, which play an important role not only in the food chain in the aquatic environment but also in humans at the end. This research was carried out in Sendang Biru Waters, South Malang Regency. The purpose of this study was to map and determine the biodiversity as well as the distribution of microalgae in coastal waters using in situ data. The data were analyzed using geographic information system techniques in the form of microalgae distribution and biodiversity maps. The results showed that the microalgae identified from the genera Chaetoceros and Navicula showing the highest frequency. The biodiversity index value at station 1 was 3,312, at station 2 was 3,184. These values indicate that the Sendang Biru waters were highly diverse in microalgae composition. The results of the temperature-water quality parameters are 27-29 ° C, salinity 32-35 ppt, and pH 7.8-8.2. The range of nitrate nutrients ranges from 0.0142 to 0.082 mg/l, while phosphate from 0.024 to 0.074 mg/l, silica showed values between 1.249 to 1.393 mg/l. Based on the analysis of chlorophyll-a, the range of chlorophyll-a values was between 1.773-1.777 mg/l. All parameters of water quality were classified as suitable for microalgae growth. Therefore, the microalgae biodiversity in this location can still be considered relatively high.Keywords:Coastal AreaBiodiversityMicroalgaeABSTRAKWilayah pesisir merupakan tempat bertemunya daratan dan lautan. Pemanfaatan wilayah pesisir secara intensif mengakibatkan terlampauinya daya dukung atau kapasitas berkelanjutan dari ekosistem pesisir dan meningkatnya potensi pencemaran pada perairan pesisir yang ditimbulkan dari berbagai aktivitas manusia. Pencemaran ini akan mempengaruhi keberadaan mikroalga yang mempunyai peranan penting bukan saja dalam rantai makanan di perairan namun manusia juga pada akhirnya.  Penelitian ini dilakukan di Perairan Sendang Biru, Kabupaten Malang. Tujuan penelitian untuk mengetahui dan memetakan biodiversitas dan sebaran mikroalga di perairan pantai selatan Kabupaten Malang, dengan data in situ. Data dianalisis menggunakan peta yang dihasilkan dari teknik sistem informasi geografis dari biodiversitas dan sebaran mikroalga. Hasil penelitian menunjukkan bahwa mikroalga yang teridentifikasi genus Chaetoceros dan Navicula memiliki kelimpahan tertinggi. Nilai index diversitas pada stasiun 1 adalah 3,312, sedangkan pada stasiun 2 adalah 3,184. Nilai tersebut menunjukkan bahwa mikroalga di perairan Sendang Biru memiliki keanekaragaman tinggi. Hasil parameter kualitas air suhu yaitu 27-29 0C, salinitas 32-35 ppt, dan pH 7,8-8,2. Kisaran nutrien nitrat adalah 0,0142 – 0,082 mg/l, fosfat 0,024 – 0,074 mg/l, dan silica berkisar 1.249 – 1.393 mg/l. Berdasarkan hasil analisis klorofil-a didapatkan kisaran nilai klorofil-a 1,773-1,777 mg/l. Seluruh parameter kualitas air masih tergolong dalam kategori baik untuk kehidupan mikroalga sehingga dapat disimpulkan biodiversitas mikroalga di lokasi penelitian relatif tinggi.Kata kunci:Wilayah PesisirKeanekaragamanMikroalga

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