Efriyeldi '
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Abundance, Distribution Pattern and Sex Ratio of Kerang Lokan (Polymesoda expansa) in Mangrove Ecosystem of Liong River Estuary, Bantan District, Bengkalis Regency Yosua Afrianus P; Efriyeldi '; Sofyan Husein Siregar
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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This research was conducted on June 2015 in mangrove ecosystem of Liong River Estuary, Bantan District, Bengkalis Regency. The purpose of this research is to know abundance, distribution pattern and sex ratio of Lokan Bivalve (Polymesoda expansa). The method used was survey by observing, measuring and taking sample directly on research site. The research site was determined by purposive sampling which consisting of 3 stations, specified by mangrove densities. The result showed that average abundance were 0.44-1.66 ind/m2. The highest abundance was at Station 1 and the lowest was Station 3. The distribution pattern based on Morisita Index was aggregated. The sex ratio showed that difference among male and female at station 1 and 2, where the percentage of female was more dominating. While, sex ratio was balance on Station 3.Key words : Abundance, Sex Ratio, Distribution Pattern, Polymesoda expansa
Jenis dan kelimpahan ikan tembakul di pantai dumai provinsi riau Reny Cristina Naibaho; Joko Samiaji; Efriyeldi '
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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The study to observe the species composition and abundance on mudskipper fish was conducted in July 2013 in Dumai coastal waters of Riau Province, Indonesia. They study was carried out in providing the lack information on the biological aspects of the mudskipper from Indonesian seas in general, and of the riau’s coasts in particular. They study used a survey method by selecting 3 different stations as the sampling sites. Fish sampels were collected during the low tide. The quadrant were used in the field in facilitating the survey in fish abudance, whilst the identification was commenced in the Laboratory of Marine Biology of University of Riau. The resuld showed that a number of three species of the mudskipper were sucessfully recorded, i.e. Periopthalmodon schlosseri, Periopthalmus variabilis (Eggert) and Baleopthalmus boddarti (Pall). In terms of abudance, the highest, 0,1733 individuals/m2 was recorded in station I and the lowest 0,0867 individuals/m2, was found in stations III. Based on the diversity index (H’), it was reported that the Dumai coast had moderate diversity of the mudskipper. None of the fish was dominating the population since the dominance index (C) was very close to null from each station. It can be concluded that the habitats of mudskipper in Dumai coasts were in the state of unstable due to its E value in which also close to one.   Keywords : Mudskipper, species composition, abudance, Riau
STUDY OF MARINE ECOTOURISM POTENTIAL IN TURELOTO BEACH REGENCY NORTH NIAS NORTH SUMATERA PROVINCE Angelia E Bernike Zebua; Dessy Yoswaty; Efriyeldi '
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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Ecotourism is a tourist trip to a natural region in order to conserve or save the environment and provide welfare to the local population. This research was conducted in February-March 2017 at Tureloto beach, North Nias, North Sumatera Province. The study aims to determine the potential of marine ecotourism and aspects of the strength of Tureloto beach to be developed as a marine ecotourism area. The method used in this research is survey method and station point determination by purposive sampling. Mainland coastal Tureloto is the result of removal of the seabed one to three meters above sea level due to the earthquake that occurred in 2005. Value of Travel Assessment Index that is on Station I, II, III and IV is 79.5%, 89.1%, 76.3% and 64.1% respectively. Assessment of strengths, weaknesses, opportunities, and threats, the development of Tureloto's coastal potential is assessed from observations at research sites, interviews and questionnaires. Tureloto Beach has the potential as a marine ecotourism area such as pristine, natural and exotic natural beauty, marine biota and various coral reefs, history of coastal geology, waters conservation zonation system as well as research resources. Aspects of Tureloto's coastal strengths are, empowerment of local communities and on the coastal can be added a place to relax.Keyword: Potential, Marine Ecotourism, Tureloto Beach
EFFECT OF TEMPERATURE DIFFERENCE ON HATCHING EGGS OF GREEN TURTLE (Chelonia mydas) Ikhsan Setiawan; Efriyeldi '; Elizal '
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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The purpose of this research was to know the condition of nesting beaches favored by green turtles (Chelonia mydas) and the effect of incubation temperature (heating source from incandescent) towards the incubation and hatching rate success. This research was conducted in October to December 2016 at the Turtle Breeding Facility at Jemur Island. This research used survey and experiment method. The research showed that the safe nesting ground with some vegetation on location I and the least predator at the location II, the wide beach area, and sloping beach with fine sand which making it easier for green turtles in digging the nest. These conditions were the reasons why green turtles choose Jemur Island as their nesting ground. Incubation temperatures effects the hatching rate success and hatching time of sea turtle’s eggs. The treatment that has the highest hatching rate is a 25 Watt light with average temperatures of 29.7oC which is 83.33%. Treatment using a 25 Watt light is the best treatment, with a highest numbers of hatching rate and has the fastest hatching time. Keywords: Hatching Egg turtle, Chelonia mydas, Jemur Island
ANALYSIS OF BIOMASS AND CARBON STOCK ON MANGROVE FOREST ECOSYTEM THE TELUK PULAI, VILLAGE OF PASIR LIMAU KAPAS, ROKAN HILIR RIAU PROVINCE Muhammad Syarif; Irvina Nurrachmi; Efriyeldi '
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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This research was conducted in April 2016. Sampling was conducted on mangrove forest ecosystems in Teluk Pulai Pasir Limau Kapas Rokan Hilir in Riau Province. The purpose of the research is to analyze the content of carbon in mangrove forest ecosystems as well as to determine the ability to these ecosystems to store carbon per unit area of mangrove forest area in the village of Teluk Pulai. The method used in this study is a survey method, which observation and sampling on the field and do the samples analyzed in the laboratory. Based on the average yield of total biomass of mangrove highest at station 1 is 198.58 ton/ha while the lowest was at station 3 is 68.80 tons/ha. The average yield of total carbon stocks are highest in station 1 with a value of 300.31 tons/ha while the total carbon stock was lowest for the station 3 with a value of 222.74 tons/ha.Keyword: Teluk Pulai, Mangrove, Biomass, Carbon
The Density and Sex Ratio of Cockle Shell (Anadara granosa) in Coastal Water of Panipahan, Pasir Limau Kapas District Hadi Sastranegara; Efriyeldi '; Yusni Ikhwan Siregar
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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A study on the density, sex ratio of cockles (A. granosa) was conducted in Panipahan coastal mud-flat during May to August 2015. Two zones of 100 m and 250 m from coast line were established. Each sampling zone were divided into 5 plots of 1 m2. Apparently average density of cockles ranged from 25.9 - 28.4 ind/m2. There was no significant differently of cockles density between zones (p>0.05). Sex-ratio male/female appeared 1:1.27.Keyword : Density, Sex Ratio, Anadara granosa and Panipahan
STRUCTURE COMMUNITY OF MANGROVE IN EAST MORO VILLAGE DISTRICT OF KARIMUN, RIAU ISLANDS Kartina '; Sofyan H. Siregar; Efriyeldi '
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
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The research on structure community of mangrove in East Moro Village District of Karimun in Riau Islands has been done in June 2014. The purpose of study was to determine the species composition and dominant species in the mangrove ecosystem of East Moro Village. The method used in the research was survey method. The stations were determined by purposive sampling in three stations. The transects were set along the 50 meters from the sea to land perpendicular coastline. The number of plots was 27 for each plot with the size of 10 x 10 m2 for tree criteria, sub-plots of 5 x 5 m2 for sapling criteria, and 2 x 2 m2 for seedlings criteria. The results of this study founded 12 species of mangrove in East Moro Village District of Karimun Riau Islands. The vegetation was dominated by species of R.apiculata with critical values ranged 125.46 to 72.29 % . The conditions of mangrove vegetation in East Moro Village was still at good condition, with the average density ranged from 3066.67 to 2922.22 Ind /ha.Keywords: East Moro village, Structure Community, Mangrove
Relationship Between Number of Vibrio sp in Sediment and in Blood Cockle (Anadara granosa) in the Coastal Waters of Bina Maju Village Kepulauan Meranti District Yahya Benardus Sihombing; Nursyirwani '; Efriyeldi '
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
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This research aimed to find relationship between numbers of Vibrio sp in sediment and in blood cockle. This research was conducted from March until May 2017. Survey method was used in this research. The data was analyzed descriptively and statistically using simple linear regression. The highest average log number of Vibrio sp in sediment was find at sampling point 2 (7.9033 CFU/g) and the lowest was at sampling point 4 (7.3187 CFU/g). Meanwhile in blood cockle the highest Vibrio number was at sampling point 3 (7.6889 CFU/g) and the lowest was at sampling point 1 (6.3411 CFU/g). Simple linear regression indicated the r value (correlation coefficient) was 0.31, showed was low which meant that the relationship between number of Vibrio sp in sediment and in blood cockle.Key words: Relationship, Vibrio sp, Sediment, Blood Cockle, Coastal waters
Hubungan Antara Bahan Organik Sedimen Dengan Kelimpahan Makrozoobenthos Di Perairan Pantai Pandan Provinsi Sumatera Utara Akmal Hawari; Bintal Amin; Efriyeldi '
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
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The study was conducted in August 2013 in the coastal waters of Pandan Beach North Sumatra Province. The method used in this study was a survey method. This study aims to determine the environmental condition of water, the type and abundance of macrozoobenthos, and its sediment organic matter relationships. makrozoobenthos abudance Sampling was designed by purposive sampling to collet macrozoobenthos by using 15x15 cm2 Ekman grab. The results showed the macrozoobenthos species found in the coastal waters of Pandan Beach composed of Anadara granosa, Cerithidea cingulata, Polymesoda expansa, Terebralia palustris, Turbo petholatus, Volema myristica, Telescopium telescopium, Nerita lineata, Hippopus porcellanus, Terebra maculata, and Terebralia sulcata. The macrozoobenthos abundance in the studied area ranged from 192,6-1,066.7 individuals/m2. The analysis of the sediment organic matter showed strong position relationships with macrozoobenthos abudance.Keywords: Organic,Sediment, Macrozoobenthos, Abundance, North Sumatera
ANALISIS KANDUNGAN LOGAM BERAT Pb, Cu DAN Zn PADA DAGING DAN CANGKANG KERANG KEPAH (Meretrix meretrix) DI PERAIRAN BATUBARA SUMATERA UTARA Doni Gunawan Tampubolon; Bintal Amin; Efriyeldi '
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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The research was carried out in April 2013 to analyze the content of heavy metal Pb, Cu and Zn in soft tissues and shells of hard clam (Meretrix meretrix) from coastal waters of Batubara and to find out the correlation between size and content of heavy metals in both hard and soft tissues, as well as to determine the safe level for consumption of this organism. The results showed that the content of heavy metals Pb in the shells is higher than in soft tissues while Cu and Zn is higher in the soft tissues. The average heavy metals content in soft tissues were different with size, where Pb (1,83 μg/g) and Cu (4,25 μg/g) was found to be higher in larger size and Zn (23,44 μg/g) was found to be higher in smaller size. In the shells Pb was higher in smaller size (2,96 μg/g), Cu was higher in larger size (4,35 μg/g) and Zn was higher in larger size (23,44 μg/g).