JURNAL PESISIR DAN LAUT TROPIS
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LAJU PERTUMBUHAN DAN KEPADATAN MIKROALGA Dunaliella sp. PADA PEMBERIAN TIMBAL ASETAT DENGAN KONSENTRASI YANG BERBEDA
Get PDFMicroalgae are organisms that contain chlorophyll and other pigments so they can carry out photosynthesis. Microalgae are widespread in nature and can be found in any environment exposed to sunlight. Microalgae are micro-sized biota with a diameter of less than 2 µm. The benefits of microalgae for other living things, especially humans, are numerous, including as a source of food and ingredients in the manufacture of medicines. Dunaliella sp. is a group of green algae that contains protein, fat and carbohydrates as a good source of food. Growth rate and density of microalgae Dunaliella sp. and the effect of lead acetate with different concentrations was observed using a microscope, starting from the lag phase, the logarithmic phase, the stationary phase and the declination phase. Dunaliella sp. Experiencing an exponential phase in the observation before treatment, namely on the 9th day and then doing the treatment. Treatment with lead acetate with concentrations of 10 ppm, 50 ppm and 80 ppm is very influential in the growth of microalgae. The result is that lead acetate contains toxins that can kill microalgae cells in both low and high concentrations.Keywords: Microalgae, Dunaliella sp., Lead Acetate, Concentratio
STRUKTUR KOMUNITAS HUTAN MANGROVE DI DESA BUDO KECAMATAN WORI KABUPATEN MINAHASA UTARA
Get PDFMangrove forest can grow on the muddy soil, along the coast and around the river estuaries that are affected by the tidal. The mangrove forest has a specific vegetation structure. Study on the structure of the mangrove forest community, was carried out in the Budo Village. Mangrove community structure data was taken using line transect method. A 100 m line was established from the sea perpendicular to the coast. A total of three line transects was made and each line has five 10 x 10 m plots with 20 m distance between plots. Distance between transect is 50m. This study found that three mangrove species Rhizophora apiculata, Sonneratia alba, and Bruguiera gymmorrhiza were found in the three transects during this study. The highest species biodiversity index was found in transect two (H’ = 0.97). R. apiculata has the highest density and relative density 0.05 ind/m2 and 67.57%. Both R. apiculata and S. alba have the highest frequency and relative frequency of 1.00 and 50% respectively. The highest species coverage and relative coverage area is belonging to S. alba in transect two, 25,89 and 63.57%. S. alba has the highest Important value index 140.72 in transect two.Keywords: Budo Village, Mangrove Forest, Community Structure.Â
STRUKTUR KOMUNITAS MANGROVE DI KELURAHAN TAPUANG, KECAMATAN TAHUNA, KABUPATEN SANGIHE
Get PDFThe information about mangrove forest community structure in Tapuang village has never been reported. The location of the mangrove forest in this village is near to the settlements. Three line transects with 50 m distance were laid perpendicular to the shore. In each line transect, 5 quadrants (10 x 10 m2) were established. The data were analyzed using several parameters density, frequency, dominance, important index value and diversity. This study found 5 mangrove species namely Avicennia marina, Sonneratia alba, Sonneratia ovata, Rhizophora stylosa and Nypa fruticans. Avicennia marina was the most species found in each transects and had the highest density, frequency, and dominance values. The highest important value index (INP) was found in Avicennia marina in transect 2 with a INP value 183.80. Mangrove species diversity index for tree category in each transect was low (H'≤1) ranges from 0.99.Key Words: Tapuang Village, Mangrove, Community StructureÂ
KAJIAN KOMUNITAS EKOSISTEM LAMUN DI SEMENANJUNG TARABITAN KECAMATAN LIKUPANG BARAT KABUPATEN MINAHASA UTARA
Get PDFThis research was conducted in the waters of Tarabitan Peninsula, West Likupang North Minahasa using quadants transect method. The purpose of this study was to determine the community structure of seagrass found in that waters as initial information for sustainable management seagrass ecosystem . Field observation was conducted to identify the seagrass species, number of individuals/shoots, percent cover for each type of seagrass in those plotting quadrants. The result of this study documented 6 types of seagrass namely, Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, Syringodium isoetifolium, Halophila ovalis and Halodule uninervis. The species composition and distribution of seagrass were varied and was dominated by Thalassia hemprichii was the most dominant seagrass species with a relative density of 55.55%, a relative frequency of 33.67%, 39.92% relative cover, an important value index of 129.03%, a diversity index of 1.30 belonging to this condition, moderate, the uniformity index of 0.72 is classified as high and the dominance index of 0.2 is classified as low. Based on Minister of Environment Decree Republic Indonesia No. 200 of 2004 concerning the status of seagrass beds, the condition of the seagrass beds in the waters of Tarabitan Village is classified as rich / healthy with a cover value of ≥ 60. Keywords : Seagrass Community, Species Composition,  distribution, Tarabitan Peninsula           Penelitian ini dilakukan di perairan Semenanjung Tarabitan Likupang Barat Minahasa Utara dengan menggunakan metode transek kuadran. Tujuan penelitian ini adalah untuk mengetahui struktur komunitas lamun yang terdapat di perairan tersebut sebagai informasi awal untuk pengelolaan lamun secara berkelanjutan. Pengamatan lapangan dilakukan untuk mengidentifikasi jenis lamun, jumlah individu/tegakan, persentase tutupan tiap jenis lamun pada tiap kuadran. Hasil penelitian ini mendokumentasikan 6 jenis lamun yaitu Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, Syringodium isoetifolium, Halophila ovalis dan Halodule uninervis. Komposisi jenis dan sebaran lamun bervariasi dan didominasi oleh jenis lamun Thalassia hemprichii merupakan jenis lamun yang paling dominan dengan kerapatan relatif 55,55%, frekuensi relatif 33,67%, tutupan relatif 39,92%, indeks nilai penting 129,03%, indeks keanekaragaman 1,30 tergolong dalam kondisi sedang, indeks keseragaman 0,72 tergolong tinggi dan indeks dominansi 0,2 tergolong rendah. Berdasarkan Keputusan Menteri Lingkungan Hidup Nomor 200 Tahun 2004, kondisi padang lamun di perairan Desa Tarabitan tergolong kaya / sehat dengan nilai tutupan ≥ 60.Kata Kunci: Komunitas Lamun, Komposisi Jenis, Distribusi, Semenanjung Tarabita
KOMPOSISI TIPE NEMATOSIT KARANG SCLERACTINIA, Pocillopora sp. DARI TERUMBU KARANG PANTAI TONTAYUO, BATUDAA PANTAI, GORONTALO
Get PDFThe objective of this present study is to know the composition of nematocyst types from the coral Scleractinia, Pocillopora sp. The coral colonies of Pocillopora sp. were collected at Tontayuo coastal coral reefs, Batudaa Pantai, Gorontalo. This research was conducted for 3 months, from September-December 2020. The method of testing the type and composition of nematocysts was carried out using an Olympus CX41 type microscope with x100 objective lens magnification connected to a computer ST24 monitor equipped with optical view 7 application (software). Photos of Pocillopora sp. both alive and skeleton form are documented in this journal. The results of the current study showed that Pocillopora sp. has the types and composition of MpM of 91.49%, while HI is 8.51%. MpM is the dominant nematocyst in Pocillopora sp. Future research is recommended to identify this coral at the species level and to study more deeply the various coral species in the genus Pocillopora based on the types and morphology of nematocysts that are useful in the taxonomy of Scleractinia corals.Keywords: Gorontalo, HI, MpM, nematocyst, Pocillopora sp., Scleractinian cora
Uji Potensi Ekstrak Kasar Teripang Laut Holothuria atra Untuk Anti Kanker Dengan Menggunakan Metode Brine Shirmp Lethality Test
Get PDFThe aim of this research is to test the potency of Sea cucumber crude extract Holothuria atra using the shrimp larvae Artemia salina Leach. The sample were take from waters of tateli at Minahasa District. Sample preparation and the potential test were done at biology moleculer and marien pharmacy laboratorium of Faculty of Fhiseries and Marine Science Sam Ratulangi University. The sample macerated once with ethanol for 24 hours. Extract of the sample were conentrated using rotary evaporator. Using the Brine Shrimp Lethality Test (BSLT) method with shrimp larvae Artemia salina, Leach. As the sample dry weight of the sample is 420 g after macerated with ethanol then decreased to 18 g after evaporated. Probit analysis of larva mortalityt data as the indicator of anti-cancer potential shown the value LC5030.01 mg/l. Bioactive compounds of sea cucumber H. arta has potency to be develop as anti-cancer material. Keywords: Anti cancer, Sea cucumber, Holothuria atra, Artemia salina leach  Â
TOKSISITAS EKSTRAK KARANG LUNAK Cespitularia sp. DARI TELUK MANADO PROVINSI SULAWESI UTARA
Get PDFSecondary metabolites produced by marine organisms commonly have unique chemical structures and very interesting pharmacological activities. Marine organisms that have the most chemical conent are produced by marine invertebrates, followed by marine plants. Groups that include marine invertebrates include: sponges, bryozoans, cnidarians and tunicates. Soft coral, which is one of the marine invertebrates, has biological activities, such as antifungal, cytotoxic, antineoplastic, antimicrobial, HIV inhibitor and anti-inflammatory. This study aims to determine the  value of the soft coral extract Cespitularia sp. taken from Manado Bay by the Brine Shrimp Lethality Assay (BSLA) method. This toxicity test was carried out quantitatively by analyzing data based on the number of deaths caused by the test extract of Artemia sp. The results obtained based on data analysis namely the value of the soft coral extract Cespitularia sp. is 53.27 ppm, this means that the extract can be developed as an anticancer drug candidate due to below below to 1000 ppm. Soft coral Cespitularia sp. categorized as toxic based on the Meyer classification or moderately toxic based on the Tanamatayarat classification and very toxic based on the Clarkson classification.Keywords: Soft coral; Cespitularia sp.; Toxicity
IDENTIFIKASI MORFOLOGI DAN KEANEKARAGAMAN KEPITING PADA TIMBUNAN BERBATU DI PANTAI PESISIR MALALAYANG DUA KOTA MANADO
Get PDFThe diversity of crabs in the Malalayang One coast is thought to vary between research locations and limited information on biota that live on rocky, sandy and muddy coastal beaches. Sampling was carried out at low tide at night by capturing directly using a protected hand and for lighting with the help of a flashlight. The collected samples were taken to the Aquaculture Technology Laboratory, Faculty of Fisheries and Marine Sciences, UNSRAT to be identified and for diversity using the Shanon-winer mathematical formula. The results of crabs obtained at five coastal locations on the coast of Malalayang, Manado, with a total of 106 with 7 species, namely Metopograpsus latifrons, Sesarmops impressus, Ocypode kuhlii, Macrophthalmus mareotis depressus, Uca vocans dussumieri, Grapsus Longitarsis and Grapsus albolineatus.Keywords: Crab, Morphology, Diversity, Coastal Ecosystem
STRUKTUR KOMUNITAS DAN ZONASI VEGETASI MANGROVE DESA DARUNU KECAMATAN WORI KABUPATEN MINAHASA UTARA
Get PDFMangrove ecosystem is a collection of distinctive plant types that contained in tropical and subtropical coastal region. The purpose of research was to find out the community structure and mangrove zonation at Darunu Village, Wori District, North Minahasa Regency. The research was conducted by  the quadrant transect line method. It was done by pulling a straight line, perpendicular from the outermost mangrove area to the land direction, along 100 m by determining three data retrieval Station. To determine the condition of mangrove then density, species frequency, species coverage, important value index, diversity index and equality types were analyzed. The result found 5 mangroves species, namely: Rhizophora apiculata, R. mucronata, Sonneratia alba, Bruguiera gymnorrhiza and Avicennia officinalis. The highest density value was R.apiculata, as well as species frequency, while the species coverage value found in S. alba. The diversity value found at Station 2. The zonation of mangrove vegetation in Darunu village respectively, at Station 1 and 2 in the front was overgrown by R.apiculata species with sandy mud substrate.  The Station 3 was overgrown by S.alba species with sandy mud. Generalyl, this location substrate contains of sandy mud and mud.Keywords : Mangrove, community structure, zonation
KANDUNGAN LOGAM BERAT ARSEN PADA ALGA Kappaphycus alvarezii SERTA SEDIMEN DI PERAIRAN DESA BUKU KECAMATAN BELANG KABUPATEN MINAHASA TENGGARA
Get PDFKappaphycus alvarezii is one species algae that is very widely developed in the tropical waters, especially in Indonesia. The potential in these waters may decrease due to heavy metal pollution that accumulates in algae and sediments. Analyzing the content of heavy metal arsenic (As), using the SNI 01-2896-1998 test method, namely the metal contamination test method in food. The results obtained from this study were samples of brown and green Kapapphycus alvarezii taken from week I-V detected containing heavy metal arsenic (As) ranging from 0.17 - 0.42 ppm for green algae and 0.12 - 0.37 ppm for brown algae. This As concentration does not exceed the maximum heavy metal limit, which is 1.0 ppm for the maximum limit for heavy metal contamination in food. The concentration of heavy metal in sediments is 1.12 ppm, not exceeding the quality standard in the Environmental Protection Agency (EPA), the maximum heavy metal limit for arsenic in sediment is below 10 mg/k