Growth Rate Of (Anadara Granosa) Spat On The Natural Habitat With Different Density In Panipahan Beach Rokan Hilir Recident Riau Province

The purpose of this study was to determine the growth rate of A. granosa with different stocking density. This study was conducted from November 2015 to January 2016. Animals test measuring between 0.8-1.0 cm. The method used in this study is experimental method with completely randomized design (CRD), one factor with 4 treatments. To minimize errors, each treatment using 3 replicates. Treatment A (50 individuals), B (75 individuals), C (100 individuals), D (125 individuals). The variables measured were the growth rate and survival rate. The results showed that the stocking density of 50 individuals generate growth in the value of the highest average or better than stocking density 75 individuals and 100 individuals, while stocking density of 125 individuals was the lowest growth. The highest level of survival was found on a stocking density of 50 individuals with an average value of 92.7 ± 3.055%, while the lowest survival was on stocking density 125 individuals with an average value of 83.5 ± 1.222%

Keberhasilan dan Pertumbuhan Larva Ginogenesis Ikan Selais (Ompok Rhadinurus Ng ) dengan Kejutan Suhu Dingin

Penyediaan benih ikan berkualitas dan berkesinambungan menjadi faktor penting dalam peningkatan budidaya ikan. Pengembangan usaha budidaya akan mengalami hambatan tanpa diberengi oleh ketersediaan benih yang cukup dan berkualitas baik. Salah satu cara yang dapat ditempuh untuk menyediakan benih yang berkualitas unggul adalah dengan jalan perlakuan Ginogenesis. Penelitian ini telah dilakukan pada bulan Mei-Agustus 2014 di Laboratorium Pembenihan dan Pemuliaan ikan Universitas Riau. Penelitian ini bertujuan untuk mengevaluasi pengaruh lama penyinaran dan lama kejutan suhu dingin serta pertumbuhan benih ginogenesis ikan selais (Ompok rhadinurus). Metode yang digunakan adalah metode eksperimen, dengan perlakuan lama penyinaran Ultraviolet terhadap sperma ikan dan lama kejutan dingin terhadap telur setelah pembuahan 1 menit pada suhu kejutan dingin 5 oC. Sperma berasal dari ikan patin (Pangasius hypopthalmus), sedangkan telur berasal dari ikan selais (O. rhadinurus). Hasil eksperimen menunjukkan bahwa perlakuan terbaik adalah lama penyinaran 3 menit setelah terjadi pembuahan 1 menit dan lama kejutan dingin 3 menit pada suhu dingin 5oC. Sedangkan pertambahan bobot dan panjang mutlak K-2H dan G-2N meiotik tidak jauh berbeda

Struktur Komunitas Makrozoobenthos pada Hutan Mangrove di Desa Mengkapan Kecamatan Sungai Apit Provinsi Riau

Penelitian ini dilaksanakan pada bulan Januari - Februari 2017. Penelitian ini bertujuanuntuk mengetahui struktur komunitas makrozoobenthos pada hutan mangroveDesa Mengkapan, Kecamatan Sungai Apit Provinsi Riau yang meliputi: jenis makrozoobenthos,kepadatan, keanekaragaman, dominasi, keseragaman dan pola distribusimakrozoobenthos. Metode yang digunakan dalam penelitian ini adalah metode survey.Sampel sedimen diambil dari 3 Stasiun. Pengambilan sampel makrozoobenthos dilakukanmenggunakan plot berukuran 1m x 1m. Analisis dan identifikasi dilakukan di laboratoriumbiologi laut, Fakultas Perikanan dan Kelautan, Universitas Riau, Pekanbaru.Berdasarkan hasil penelitian diperoleh makrozoobenthos yang ditemukan terdiridari 3 kelas yaitu gastropoda, bivalvia, dan crustacea. Kelimpahan makrozoobenthosberkisar 58,3 - 90 ind/m2. Kelimpahan relatif tertinggi pada stasiun 1 yaitu spesiesNerita sp (34,7%), pada stasiun 2 yaitu spesies Cassidula aurisfelis (17,2%) dan stasiun3 yaitu spesies Telescopium telescopium (22,3%). Keanekaragaman (H\u27) padastasiun-stasiun penelitian berkisar 2,08-2,21, indeks dominansi (C) pada stasiun-stasiunpenelitian berkisar 0,23-0,26, indeks keseragaman (E) pada stasiun-stasiun penelitianberkisar 0,45-0,50 dan pola distribusi makrozoobenthos (Id) berkisar antara 1,02-1,05(mengelompok)

Biomass and Density of Seagrass Enhalus Acoroides in the Village Waters Jago-jago of Tapanuli Tengah North Sumatera Province

Research has been conducted in the month of February – April 2017 at Village Waters Jago-Jago of Tapanuli Tengah North Sumatera. The aim of this study was to determine the density and biomass and station characteristics determine the effect of the density and biomass of seagrass Enhalus acoroides in Village Waters Jago-Jago North Sumatera. Results showed the highest density of seagrass Enhalus acoroides was located on the mangrove forest community areas (station III) in the amount of 45,55 shoots/m2. Enhalus acorides biomass was highest at station III with a dry weight of 110,70 gr/m2. The lowest of seagrass biomass was at residential areas (station I) with a dry weight of 75,5 gr/m2. The result of simple linier regression test for the effect of density on biomass obtained r = 0,717

The Development Strategy in Marine Eco-tourism of Nongsa Beach Batam City in Riau Islands Province

This study was conducted on May 2016 at Nongsa Beach in Batam City, Riau Islands Province. The purpose of study was to analise the potential of tourism in Nongsa Beach as a marine tourism. The method used in this study is a survey method. The result of the study show that Nongsa Beach has a high potential to serve as a national and International marine ecotourism. This was based on the aspects of chemical physics parameters oceanography, geology and geomorphology, climate coastal ecosystems, historical value, and overview from tour players, and the values of Pengukuran Willingness to Accept (WTA) dan Willlingness to Pay (WTP). The concept of ecotourism can be applied to develop marine tourism in the island based on the analysis of strategy of Strengths – Opportunity (SO), Strategi Weakness - Opportunity (WO), Strategi Strengths – Threats (ST), Strategi Weakness – Threats (WT)

The Relations Between Concentration of Nitrate and Phosphate to Abundance of Planktonic Diatom in Sakera Coast Waters of Bintan Regency of Kepulauan Riau Province

The research was conducted in February 2017 at Sakera coast Bintan regency of Kepulauan Riau Province,with the aims to determine the concentration of Nitrate and Phosphate in water, abundance of planktonic diatom and, the relationship between the concentration of Nitrate and Phosphate with abundance of planktonic diatom.The research methods used a was survey method. Each station consists of three sampling points. The results showed that the concentration of Nitrate ranged from 0.179-0.240 mg / L, whereas Phosphate concentration ranged from 0.175-0.194 mg/ L. The planktonic diatom found in the waters of Sakera coast consists of 2 ordo and 9 genus . The most dominant species were Isthmia sp, Chaetoceros sp and Nitzschia sp.The highest abundance was at station 4 which was a residential area (5540 ind /L), while the lowest was at station 1 which was the oil refining area (3488 ind / L). The relationship between concentration of Nitrate with diatom abundances has weak positive correlation, while the relationship between concentration of Phosphate with diatom abundances has weak negative correlation

Komposisi Jenis dan Kelimpahan Fitoplankton Perairan Laut Riau

This research was conducted in April 2013 and was located at Riau marine waters. Samples were analyzed in the Biology Laboratory of Marine Science Department of Fisheries and Marine Science Faculty of Riau University. The aim of this study was to observe the phytoplankton communities. This research used survey method. The study found 31 species of phytoplankton, these were 19 species from Bacillariophyceae, 9 species from Dinophyceae, 2 species from Chlorophyceae and 1 species from Cyanophyceae. Phytoplankton was dominated by group of Bacillariophyceae (Diatoms) 61%. The other groups comprising of Dinophyceae 29%, Chlorophyceae (7%), and Cyanophyceae 3%. Phytoplankton abundance varied from 87-593 ind/L, the higest value in station 9 Zone III and the lowest value in station 11 zone III. Whereas the highest value of zone abundance was zone II 443 ind/L and the lowest was zone I 253 ind/L. Phytoplankton community was dominated by the group of diatoms, such as Nitzschia sigma, Thallasiothrix longissima, and Thallasiothrix delicatula