Aquatic Resources Management

Diplocheilichthys pleurotaenia is one of native fish present in the Kampar River. This fish used to migrate to downstream area due to reproductive activities. The construction of the Koto Panjang Dam may hamper this activity and also divided the population into 2 groups, the upstream and downstream population. To understand the biological aspects of the fish in both populations and its relationship to the presence of the dam, this study has been conducted from November 2011 to August 2012. The fish was sampled in the Kampar River, in the upstream and downstream of the Koto Panjang Dam. The fish was captured using gill nets monthly for a ten months period. The number of fish captured in the upstream was 7, while that of of the downstream was 228. The sex ratio of the fish is almost balance. The fish from both population shown similar reproductive pattern, there are mature males and females in April and there is no fish caught in May due to reproductive purposes migration. The reproductive activity of the upstream fish is unsucceed as there is no single small fish found. The rarity and the lack of small fish in the upstream population is strongly related to the failure of reproduction due to the construction of the Koto Panjang Dam. Introduction. Kampar River is one of big rivers in the Riau Province, Indonesia. In 1996, a reservoir was built in the river flow and it was designed for a water power plant (PLN 2006). The construction of the dam changed the topography of the river and as a consequence, it changes the water mass and it leads to change the biotic and abiotic characteristics in both sides, in the streams and in the reservoir as well (Mulia 2006). Physically, the reservoir has cut off the river flow, and makes the water flow to the turbine path. The water flow in the reservoir is only opened when the water volume was higher than the normal level (PLN 2006). The construction of 90 m height dam wall, however, has completely blocked any access from the downstream side, causing the separation of aquatic organism populations in the downstream and upstream of the dam. A similar case was also present as there is dam construction in the Parana River, Argentina (Araya et al 2005). Before the construction of the dam, there was a fish migration phenomenon. Local people stated that after the rainy season there were many types of fish fingerlings migrating from the downstream to the upstream area of the river. Fishermen from villages around the river stated that types of fingerlings present in the migration group were lelan (Diplocheilichthys pleurotaenia), paweh (Osteochilus sp.) kapiek (Puntius schwanenfeldii), pantau (Rasbora sp.), and bunga air (Clupeichthys goniognathus). As the dam was constructed, the fish migratory activities must be obstructed. The fish from the upstream may not be able to go to the downstream as the only water channel to the river below is the turbine path that flown the water fastly, up to 384 m 3 s-1. The water is directly flush to the turbine system and the fish may not be able to pass it. As well as the upstream fish migration, the downstream fish migratory activities were

This research was conducted from 9 until 20 October 2006 at Pelabuhanratu port. The research goal is to know the various fishing gear, trip, production, sustainable yield, utilization level of ribbon fish that were landed at Pelabuhanratu port and to know amount of fishing instrument at Pelabuhanratu. Statistic data were obtained from the port and analyzed by a surplus production models (Schaefer).  Fishing gear of ribbon fish were hand line, seine net, and lift net. Maximum sustainable yield (MSY) with three fishing gear are 318.7 tons and maximum effort (fopt) are 1,023,322 trips. Ribbon fish utilization level about 5.75% - 88.46% with average/year is 50.23% (growth). Effort level about 24.61% - 201.48% with average/year is 50.68% .

ABSTRAK Usaha perlindungan kawasan habitat gonggong dan pengaturan eksploitasinya perlu dilakukan. Penelitian dilakukan pada KKLD Kabupaten Lingga, Provinsi Kepulauan Riau, Indonesia pada bulan Juni – September 2010. Adapun Faktor lingkungan yaitu fluktuasi pasang surut 1,2 – 1,5 m, Kedalaman perairan 4,2 – 6,0 m, Suhu 26,0 – 28,2 o C, Kecerahan air 4,3 – 5,0 m, Kecepatan arus 0,4 m/detik, Oksigen terlarut 5,1 – 7,0 mg/l. Kondisi salinitas yaitu sebesar 35,0 o /oo dan pH 8,11 – 8,41 dan substrat pasir berlumpur. Jenis lamun yang ditemui Enhalus acoroides dengan kerapatan rata-rata 7,23 – 16,22%. Kelimpahan siput gonggong 0,2 – 1,9 individu/m 2 , berat 13,7 – 47,6 gr, Panjang (L) 49 – 78 mm, dan Ketebalan bibir luar (OL) 1 – 6 mm. Hubungan panjang dan berat Y = 3,086 e 0,033X. Hasil tangkapan siput gonggong berkisar antara 10 – 30 kg/orang. Produksi hasil tangkapan tersebut mencapai kisaran 50 – 600 kg per hari. Untuk rencana usulan kawasan konservasi gonggong setelah melalui analisis matrik kesesuaian dan plotting pada peta Desa Limbung dan Desa Linau didapatkan yaitu Desa Limbung seluas 9,599 ha dan Desa Linau seluas 0,930 ha.

ABSTRAK Sumber daya perikanan dapat dimanfaatkan secara berkelanjutan dengan tidak melebihi kapasitas untuk memulihkan dirinya. Penelitian ini bertujuan menggambarkan sumber daya perikanan dalam wilayah pengelolaan Kawasan Konservasi Laut Daerah (KKLD) Kabupaten Lingga yang meliputi biofisik, kondisi dan potensi perikanan. Kedalaman perairan berkisar antara 0,5 – 52 m, kecepatan arus rata-rata 20-80 cm/s dengan arah arus pasang 135-180 o dadan arah arus surut 316=355 o. Kecerahan air antara 3 – 7 m, pH antara 8,1 – 8,3, Oksigen terlarut antara 4,16 – 8,3 ppm, salinitas 27,9 – 31,2 0 /00. Jumlah Rumah tangga Perikanan 9.697, armada penangkapan ikan berupa perahu/sampan dan perahu motor/pompong, Potensi Perikanan Tangkap lebih kurang 275.371,43 ton per tahun.

This study has been conducted to determine the most feasible site for building breeding and nursery plant of Scylla serrata in Indragiri Hilir District, Riau. Analysis has been done by scoring the accessibility, topography, land status, water quality, available, infrastructures (especially electricity network), perceiption of local people, security, economic feasibility and landuse system of six sites. The most ideal site is situated in the Tanjung Baru (Tanah Merah Subdistrict). The results also suggested that the plant building in the area should be timely implemented to enhance local economic development.

The aim of the current study was to assess the demersal fish and shrimp stocks in Mallaca Strait, especially within the area of Bengkalis District, hence determining the total allowable catch (TAC) in the area regarding the resources in concern. We uses surplus production methods to analyze data collected through field surveys in Bengkalis, and surroundings of Bengkalis island, Asam straits, ransang island, Halang island, panipahan island and jemur island. Demersal fish catch range of the area was 3,236.90-13,247.95 tonnes with catch effort range of 20,576 – 93,414 units, whereas shrimp catch range was 5,572,00-13,247.95 tonnes with catch effort range of 364-509 units. As fish demersal Maximum sustainable yields reached 13,497,17 tonnes yr-1, the estimated TAC was 10,794,54 tonnes yr-1, coresponding to a maximum catch effort of 45,256 units. Shrimp stock (MSY) was 30,835,75 and TAC was 24,667,80 tonnes yr-1, coresponding to catch effort of 293 units.

Aktivitas perikanan di sekitar kawasan P. Jemur Kabupaten Rokan Hilir Provinsi termasuk yang tinggi serta mempunyai potensi dikembangkan menjadi objek wisata sehingga dapat menggangu aktivitas penyu hijau. Untuk itu diperlukan model pengelolaan kawasan konservasi penyu di P. Jemur Kabupaten Rokan Hilir. Metode penelitian dilakukan dengan metode deskriptif dan penyusunan model dilakukan dengan diskusi bersama stakeholder. Habitat teristerial di P. Jemur yaitu suhu udara 28 - 29 oC, Suhu pasir 24,5 – 28 oC, kelembaban tanah 5 – 6 %, kecepatan angin 2,5 – 3,5 m/det dan tingkat kebisingan 52 – 55 dBA, pH tanah 6,4 – 6,5, fraksi pasir termasuk medium sand, jumlah sarang 5 – 8 buah dan luas areal sarang 5.000 – 6.000 m2. Diameter saran 30 – 40 cm, kedalam 80 – 100 cm. Model pengelolaan kawasan adalah keterpaduan dan program yang dapat dilaksanakan yaitu pengelolaan tataguna lahan, pengendalian kualitas air, pelarangan eksploitasi telur penyu, penangkaran penyu, peningkatan kapasitas kelembagaan dan kesadaran dan peran serta masyarakat.

Penelitian ini bertujuan memberikan keragaan sumberdaya pesisir dan pulau-pulau kecil dan analisis kecenderungan dampak penambangan pasir laut serta memberikan arahan pemanfaatan dan zona preservasi di Kabupaten Kepulauan Riau. Penelitian berlangsung dari bulan Oktober – Desember 2003. Metode penelitian mengunakan metode survei dan analisis interprestasi citra satelit landsat ETM7. Potensi Ekosistem Mangrove seluas 24.091,03 ha, Ekosistem padang lamun seluas 7.548,66 ha, Ekosistem Terumbu Karang seluas 15.291,42 ha. Kondisi ekosistem mangrove dari sedang hingga baik, padang lamun keadaan sedang – baik serta terumbu karang dengan kondisi rusak hingga baik. Produksi perikanan tangkap mencapai 88.864,3 ton pada tahun 2002. Hasil analisis overlay kedudukan kuasa pertambangan (KP) dengan areal penangkapan, kawasan lindung dan kawasan budidaya perikanan terdapat 18 unit KP yaitu 12 KP pada daerah penangkapan tradisional (5-10 GT; <6 mil) dan 6 KP pada kawasan Lindung.

Penelitian ini dilakukan pada sungai Kampar di bagian hilir Bendungan PLTA Kotopanjang mulai dari Rantau Berangin hingga Danau Bingkuang. Penelitian ini bertujuan untuk mengetahui struktur komunitas ikan di hilir bendungan. Suhu air selama penelitian berkisar antara 26-27oC, DHL 41-47,50umhos/cm, Turbiditas 7,4 – 9,3 NTU, Kecerahan 90 – 105 cm, oksigen terlarut 6,57-7,20 ppm, karbondioksida 4,0-4,30 ppm dan pH 6 – 6,5. Komposisi ikan yang ditemukan terdiri dari 14 famili yang tersusun dalam 49 jenis ikan yaitu famili Cyprinidae, Cobitidae, Clariidae, Bagridae, Siluridae, Pangasiidae, Notoperidae, Helostomatidae, Mastacembelidae, Ophicephalidae, Osphronemidae, Pristolepididae, Belonteiidae, dan Anabantidae. Komposisi ikan terbesar dari famili Cypdnidae yaitu 30 jenis selanjutnya dari famili Bagridae yaitu 3 jenis. Indeks kekayaan jenis dan keragaman (diversitas) menunjukkan bahwa struktur komunitas ikan tergolong sedang dan belum terlihat pengaruh bendungan PLTA Kotopanjang terhadap komposisi dan struktur komunitas ikan. Struktur komunitas ikan di Sungai Kampar pada bagian hilir bendungan PLTA Kotopanjang dipengaruhi oleh faktor oksigen terlarut.

The objective of the present study was to examine the length-weight relationships and condition factors of snapper Lutjanus russellii, ponyfish Aurigequula fasciata and white-spotted spinefoot Siganus canaliculatus harvested from Ulelhee Bay, Banda Aceh City, Indonesia. These species are the predominant fishes caught by traditional beach trawl in Ulelhee Bay, Banda Aceh City, Indonesia. The sampling was conducted for three months from April to June 2015 at one-week interval. A total of 900 fish samples (300 individuals for each species) were measured for the total length and body weight. The length-weight relationships were calculated using Linear Allometric Model (LAM), while the relative weights (Wr) and Fulton's condition (K) factors were calculated to assess the condition of the fish samples. The results showed that the b value of 3.04 in snapper indicates isometric growth pattern, while ponyfish and white-spotted spinefoot fish had the b values of 1.41 and 1.75, respectively, and these species display an allometric growth pattern. The average Fulton's condition factor (K) of snapper was 3.01 for male and 2.49 for female; female ponyfish has the K value of 2.92 and 2.92 for male. In addition, the average K value of white-spotted spinefoot was 2.61 and 2.59 for female and male, respectively. The relative weight condition factor ranges from 58.73 to 166.09 for snapper, from 70.55 to 129.65 for ponyfish, and from 71.63 to 133.53 for white-spotted spinefoot. In general, the relative weight condition factors tendedto be 100. It is concluded that snapper has isometric growth pattern, while ponyfish and white-spotted spinefoot display the negative allometric growth pattern. The condition factors are in excellent condition and indicate a balance of prey and predator.

In aquaculture probiotic feeding could play a crucial role in developing microbial control strategies, since disease outbreaks are recognized as important constraints to aquaculture production and the fear of antibiotic resistance. In this study, lactic acid bacteria (LAB) strains from the intestinal tissue of African catfish Clarias griepinus were successfully screened, characterized and identified. The isolates (S1#8, S1#9, S1#10, S1#18, S1#19 S1#20 and S1#21) shared common morphological characteristics of LAB such as non-sporulating, Gram positive cocci or cocco-bacilli shape. These were the dominating morphology found in the catfish, as compared to other types of LABs reported to be found in freshwater fishes. All of the 35 isolates have the ability to utilize lactose as part of their metabolism process and showed negative reactions towards catalase test. These isolates were also tested for antimicrobial activities using disc diffusion assay against indicator Salmonella typhimurium and Escherichia coli. Based on the partial 16S rRNA sequences, the selected LAB isolates belonged to a member of Lactococcus lactis with 98% DNA similarity. This strain can be used as probiotic in aquaculture feeding.

Plastik adalah bahan sintesis dari hasil polimerisasi berbagai macam monomer. Hampir semua jenis plastik akan melayang ataupun mengapung dalam badan air. Hal ini akan menyebabkan plastik terkoyak-koyak dan terdegradasi oleh sinar matahari, oksidasi dan abrasi mekanik membentuk partikel-partikel plastik. Ecobrick adalah salah satu cara penanganan limbah plastik dengan mengemas plastik yang bersih dan kering ke dalam botol plastik. Pemberdayaan masyarakat untuk mengolah sampah plastik menjadi sesuatu yang berguna dalam jangka waktu yang lama adalah salah satu kunci keberhasilan program daur ulang limbah plastik. Kegiatan pengabdian ini akan memberikan manfaat kepada berbagai pihak, diantaranya bagi peserta pengabdian bagi masyarakat, bagi anggota pelaksana penyuluhan, bagi Perguruan Tinggi dan bagi pemerintah. Khalayak sasaran dalam kegiatan pengabdian ini adalah masyarakat Kampung Bunga Raya Kabupaten Siak. Berdasarkan hasil kegiatan pengabdian kepada masyarakat yang telah dilakukan ...

The objectives of this research was 1) to measure the development of mouth opening width and 2) to analyze the digestive enzyme activities. The research was conducted from April to November 2017 in the Hatchery Laboratory, Faculty of Fisheries and Marine Sciences, University of Riau. The results showed that the increase of mouth opening and the rate of gut evacuation of sheatfish larvae was due to the increase of digestive enzyme activities and feed consumption rate.

Seagrass is present in the Genting Beach. During the low tide, however, propeler of fishermen ship damage the seagrass habitat in general. To understand the types and density of seagrass in Genting Beach, a study has been conducted in April – June 2018. There were 3 sampling points, in the river mouth of the Genting River (SP I), in the shipping line (SP II), and in the mangrove area (SP III). Seagrass were taken from 3 quadrants (1x1 m) in each sampling point. Sampling were conducted once. The seagrass was then identified. Results shown that there was one type of seagrass species, namely Enhalus acoroides. Seagrass density range from 17.99 – 90.78 organism/m2 and the coverage of seagrass was around 3.04% – 14.39%, water temperature was 31.66 - 32ºC, salinity 32‰, pH 8, clarity 0.26 – 0.33 m, current flow 0.37 – 0.42 m/s, sandy mud substrate, nitrate 0.033 – 0.075 mg/L, phosphate 0.035 – 0.104 mg/L and organic material was 20.50 – 27.57%. The seagrass density in the Genting Beach is...

Osteochillus hasselti was commonly inhabit the Lubuk Siam Lake. A research aims to understand the standing stock of O. hasselti in that lake was conducted in July to August 2018. The fish was sampled everyday for 10 days in July and 10 days in August, in 3 sampling points (in the inlet area, in the middle of the lake, and the outlet) using gill nets. The standing stock was analyzed using Leslie method. Results shown that the initial population (No) of the fish was 315 kg and the final population (Nt) was 301 kg and the exploitation level was 8%. The water quality parameter shown that temperature was 27-28oc, clarity 6395 cm, pH = 6 and dissolved oxygen was 5.32–5.40 mg/L. Data obtained indicate the water quality in the Lubuk Siam Lake is good and it is able to support the life of O. hasselti.

Background: High stocking density and intensive feeding in aquaculture systems lead to the accumulation of organic waste, which results in an increase in ammonia, nitrite, and nitrite concentrations in culture media. Biofloc is a potential technology to overcome this problem. The starter is a crucial carbon source for bacteria in the formation of biofloc. The objective of the present study aimed to explore the best starter of biofloc in a red tilapia Oreochromis niloticus culture system. Methods: A completely randomized design with four levels of treatment was used in this study. The tested starter was (A) control treatment, biofloc without starter, (B) biofloc with molasses starter, (C) biofloc with tapioca starter, and (D) biofloc with sucrose starter. The floc was cultured in 100-L tanks with a salinity of 17 ppt. The tanks were stocked with O. niloticus with a size of 3.71±0.11 cm at a stocking density of 30 fish per tank. The fish were fed on a commercial diet two times a day a...

The purpose of this community service was to provide knowledge and understanding of halal certificates to the public, increase public awareness of the importance of halal certificates and motivate the community to have halal certificates for those who have businesses in the scope of halal products. The service method was carried out by socializing the role of the halal certificate, giving questionnaires to participants and evaluating the questionnaire. The parameters of public halal awareness are reviewed from general knowledge about halal law, public awareness about the implementation of halal products and knowledge about the role of halal certificates. The results showed that all participants had good general knowledge of halal law, had high level of awareness of the implementation of the use of halal products and all participants have good knowledge about the role and management of halal certificates. The results of direct discussions with participants explained that micro busine...

Plastic waste pollution in the land and the river continues to rise. Plastic waste including marine pollution and debris can menyebab disrupt aquatic ecosystems. However, hazards of plastic waste pollution in the waters are still poorly understood by the public, especially for the people of Kampung Sungai Kayu Ara. To give knowledge to people in Kampung Sungai Kayu Ara Sungai Siak Apit about the dangers of plastic waste pollution in the rivers and sea required educational activities. So that more people know and understand the dangers of plastic waste, the public needs to be educated and understanding through extension activities. Extension activities carried out in Kampung Sungai Kayu Ara in September - October 2017. Implementation of education using lecture and discussion of the material presented. Conducted outreach activities to broaden the public about the negative impact of plastic waste so as to reduce the environmental impact of plastic waste on the river and the sea. The re...

Background The objective of the present study was to evaluate the growth performance and feed utilization of African catfish Clarias gariepinus fed a commercial diet and reared in the biofloc system enhanced with probiotic. Methods The treatment was the frequency of probiotic application into the cultured system, namely, 5-day interval, 10-day interval, and 15-day interval for 60 days of experiment. Biofloc culture was grown in an experiment tank (vol. 2000 L) by mixing the probiotic (Bacillus sp.) 10 mL and molasses 200 mL per liter of water.  The fish was stocked into the biofloc system 7 days after cultured at stocking density of 1000 fish tank-1.  The fish was fed a commercial diet that contains 38% crude protein, twice a day at satiation. The application of probiotic was reperformed after 5 days, 10 days, and 15 days after stocking. Results The study showed that the growth performance, survival, and feed utilization of African catfish were higher in the treatment at 5-day inter...

Lactic acid bacteria (LAB) have been isolated successfully from the tiger grouper Epinephelusfuscoguttatus intestine. However, their genus or species have not been identified. Therefore, the objective of the present study was to characterize the three isolated LAB (KSBU-12C, KSBU-5Da, and KSBU-9) based on their phenotype and genotype. The LAB phenotype was examined by observing morphological features including cell morphology, spore production and motility. The physiological tests were performed in 6.5% NaCl at the  temperatures of 10 oC and 45 oC, and the biochemical tests were evaluated based on the production of enzymes catalase, oxidase and arginine dehydrolase, following  the Standard Analytical Profile Index, API 50 CH kit.  The genotype was examined based on 16S rDNA gene sequence analysis , and the products were analyzed using the BLAST (Basic Local Alignment Search Tool) NCBI database. The three isolates (KSBU-5Da, KSBU-12C, and KSBU-9) were categorized into the genus Enter...