This study aims to determine the composition and distribution patterns of seagrass species in the Gulf of Tomini, Tabulo Selatan Village and Keramat Village, Mananggu District, Boalemo Regency. This research was conducted for 3 months starting from June 2017 until August 2017. The method used was the line transect method at 2 village locations, each with 3 stations. The results showed that the composition of seagrass species at the study site consisted of seagrass Cymodocea serrulata, Cymodocea rotundata, Enhalus acoroides, Syringodium isoetifolium, Thalassia hemprichii and Halophila ovalis. Seagrass distribution patterns are included in the random and cluster categories.

Penelitian ini bertujuan untuk mengetahui pengaruh pemberian substrat lumpur kolam sebagai pupuk untuk pertumbuhan Daphnia sp. Metode yang digunakan dalam penelitian ini adalah metode eksperimen dengan 4 perlakuan dan 3 kali ulangan. Hasil yang diperoleh menunjukkan bahwa pada setiap perlakuan tidak memberikan pengaruh nyata. Rata-rata pertambahan Daphnia sp. tertinggi terdapat pada pemberian substrat lumpur dasar kolam pada perlakuan B yaitu 27,09 ind/l di ikuti oleh perlakuan C dan A yaitu 23,90 ind/l dan 23,67 ind/l serta terendah pada perlakuan D yaitu 9,71 ind/l. Sedangkan pada pemberian substrat lumpur kolam pada ketebalan 10 cm memiliki jumlah relatif menurun dari pemberian substrat lumpur dasar kolam yaitu perlakuan A yaitu 17,90 ind/l, perlakuan C yaitu 14,33 ind/l, Perlakuan D yaitu 12,62 ind/l, dan perlakuan B yaitu 11,48 ind/l. Dengan persamaan regresi pada pemberi substrat lumpur dasar kolam yaitu y = -4.507x + 32.36, R2 = 0.564, dan pemberian substrat lumpur pada ketebalan 10 cm yaitu y = -1.299x + 17.33 , R2 = 0.358. This study aims to determine the effect of the pond mud substrate as fertilizer for the growth of Daphnia sp. The method used in this study is an experimental method with 4 treatments and 3 replications. The results obtained indicate that each treatment did not have a real effect. The average increase in Daphnia sp. the highest was found in the substrate mud substrate pool in treatment B that was 27.09 ind / l followed by treatments C and A which were 23.90 ind / l and 23.67 ind / l and the lowest in treatment D was 9.71 ind / l. Whereas the administration of pond mud substrate at a thickness of 10 cm has a relatively decreasing amount of substrate pond substrate administration, namely treatment A is 17.90 ind / l, treatment C is 14.33 ind / l, Treatment D is 12.62 ind / l , and treatment B is 11.48 ind / l. With the regression equation for the substrate sludge pond bottom is y = -4.507x + 32.36, R2 = 0.564, and the giving of mud substrate at a thickness of 10 cm is y = -1.299x + 17.33, R2 = 0.358. Katakunci: Daphnia sp.; substrat; lumpur; pupuk; pertumbuhan. Keywords: Daphnia sp.; substrate; mud; fertilizier; growth

Penelitian ini bertujuan untuk mengetahui kondisi mangrove di wilayah pesisir Kecamatan Paguyaman Pantai berdasarkan tingkat kerapatan jenisnya. Pengambilan data dilakukan pada Bulan Juli-Agustus 2015 di Desa Lito, Desa Limbatihu dan Desa Apitalao menggunakan metode garis transek kuadrat plot bertingkat (nested quadrat). Tingkat kerapatan jenis dihitung berdasarkan kriteria pertumbuhan mangrove yaitu semai, pancang dan pohon. Hasil penelitian menujukkan bahwa jenis-jenis mangrove yang ditemukan sejumlah 11 jenis. Secara umum kondisi mangrove masih dalam kondisi relative baik dengan nilai kerapatan berdasarkan kategori pertumbuhannya yaitu: Tingkat semai memiliki kerapatan antara 50.600-291.700 tegakan/ha; tingkat pancang dengan nilai kerapatan berkisar antara 6.500-47.930 tegakan/ha; dan tingkat pohon memiliki kerapatan 2.983-9.550 tegakan/ha. This study aims to determine the condition of mangroves in the coastal area of Paguyaman Pantai District based on the level of species density. Data was collected in July-August 2015 in Lito Village, Limbatihu Village and Apitalao Village using the nested quadrate plot transect line method. Species density level is calculated based on mangrove growth criteria, namely seedlings, saplings and trees. The results showed that there were 11 species of mangroves. In general, mangrove conditions are still in relatively good condition with density values based on growth categories, namely: seedling level has a density between 50,600-291,700 stands / ha; sapling level with density values ranging from 6,500-47,930 stands / ha; and tree level has a density of 2,983-9,550 stands / ha. Katakunci: Mangrove; penilaian; kerapatan; semai; pancang; pohon. Keywords: Mangrove; assesment; density; seedling; sapling; tree.

Penelitian ini bertujuan untuk mengetahui efektivitas alat tangkap cumi totabito yang dioperasikan oleh nelayan di Desa Lamu Kecamatan Batudaa Pantai Kabupaten Gorontalo. Penelitian ini dilaksanakan pada bulan Agustus 2016 sampai Februari 2017. Metode yang digunakan adalah metode survei. Analisis data yang digunakan pada penelitian ini adalah analisis deskriptif. Dari hasil penelitian menujukkan bahwa alat tangkap cumi totabito memiliki efektivitas relatif yang berbeda antara satu dengan lainnya. Alat tangkap dengan lampu LED warna hijau memiliki tingkat efektivitas sebesar 29,90 %, LED warna biru sebesar 41,89 % dan LED warna-warni (merah, biru dan hijau) sebesar 28,21 %. Terlihat bahwa pancing cumi totabito dengan lampu LED berwarna biru yang paling banyak menghasilkan cumi. This study aims to determine the effectiveness of totabito squid fishing gear operated by fishermen in Lamu Village, Batudaa Pantai District, Gorontalo Regency. This research was conducted in August 2016 to February 2017. The method used is a survey method. Analysis of the data used in this research is descriptive analysis. From the results of the study showed that totabito squid fishing gear has a relative effectiveness that is different from one another. Fishing gear with green LED lights has an effectiveness level of 29.90%, blue LEDs at 41.89% and multi color LEDs (red, blue and green) at 28.21%. It appears that totabito squid fishing gear with blue LED lights produce squid the most. Katakunci: Alat tangkap; cumi; totabito; efektivitas. Keywords: Fishing gear; squid; totabito; effectiveness

The purpose of this study is to determine Escherichia coli bacterial content in chunks of yellowfin tuna (Thunnus albacores) sold in Central Market Gorontalo. This study uses descriptive analysis method which gives an idea as carefully as possible about an individual, state, symptom, or a particular group. Based on observations of the total MPN Coliform samples A, B and C have MPN coliform exceed ISO standards for quality and food safety requirements of fresh fish, ie 24.00 MPN / g. Test EMBA (Eosin Methylene Blue Agar (EMBA) indicates that the Tuna Yellowfin positive for the bacterium Escherichia coli with colors that are characterized by green metalic. Pieces of tuna sold in the central market town Gorontalo safe to eat at 08:00 am, while at 10:00 am and 12:00 am bacterial content becomes a lot more. The longer the fish are displayed at table without any effort to maintain the quality of the fish, the more the bacteria contained in the fish. Keywords: E. coli; yellowfin tuna; Thunnus albacores; pieces; content analysis.

This study aims to determine the suitability of recreational tourism in Libuo Beach, District of Paguat, Pohuwato Regency based on biophysical parameters. The research was conducted from January to December 2015. The method used is descriptive method using direct observation and measurement in the field. The data used are primary data obtained from observations and direct measurements in the field includes the parameters depth, type of beach, wide beaches, seabed material, current speed, water transparency, harmful biota, and the availability of fresh water. Analysis travel suitability index is calculated according Yulianda travel (2007). The analysis showed that the three research stations in Libuo Beach are in “appropriate” category (SI) with values ranging between 88-93%, making it feasible as a location for leisure travel. Keywords: tourism; suitability; beach; recreation.

This study aims to determine the condition of gastropod in the area of mangrove and seagrass in the waters of the District of Tilamuta Pentadu Timur village, Gorontalo province. This study was conducted in November 2015 to April 2016. The method used is the 1x1 m transect quadrant. Data analysis included diversity index, Frequency type and Gastropod Similarity Index Efipauna and Treefauna. The results showed that the mangrove ecosystem, has gastropod species Epifauna of 17 types and 15 types for Treefauna. While on seagrass, consists of nine types Epifauna and 6 types Treefauna. Gastropod diversity index value Epifauna on mangrove ecosystems are 0.55 and 0.70 whereas Treefaunaie on seagrass for gastropods Epifauna is 0.77 with a high diversity categories and Treefauna is 0.18 with a low diversity category. Sulcata terrebralia species has the highest value of the frequency of attendance either in mangrove and seagrass ecosystems. Gastropod similarity index in mangrove and seagrass ecosystems is 79% with a very similar category. Keywords: mangrove; seagrass; gastropod.

The purpose of this study is to determine the suitability of land for shore excursions and the carrying capacity of the region in the category of recreational beach activities at the beach tourist area Bolihutuo Subdistrict Botumoito, District Boalemo. Research was conducted in February 2015 until Desember 2015. The method used in this research is descriptive and qualitative methods. Data collection techniques was to measure the suitability of beach resort that is depth, type of beach, wide beaches, basic materials waters, current speed, the slope of the beach, water transparency, the closure of beach land, dangerous biota, the availability of fresh water as well as the carrying capacity of the beach recreation namely the time spent by visitors and the time provided by the manager. The result shows that Bolihutuo is in the category of very suitable (S1) with the index value of 91%. Bolihutuo Beach has a capacity of 1998 visitor per day, with an area that can be utilized by the shoreline of about 30.000m2. Keywords: Suitability; carrying capacity; beach tourism

This study aims to determine the type of fungus and calculate the range of fungal colonies on sea algae Kappaphycus alvarezii by maintenance at different ages of 25 days, 35 days and 45 days. Samples taken from the District Anggrek, North Gorontalo District, Province Gorontalo. Method of data processing is descriptive and presentation of data in a frequency distribution table. Methods of testing done by the identification of marine algae samples in the laboratory of Fish Quarantine Station Class I Djalaluddin Gorontalo. The results showed that the fungus identified in the Sea Algae Kappaphycus alvarezii, are Rizhopus sp, Aureobasidium pullulans, Mucor sp and Fusarium sp. The range of fungal colonies on Sea Algae Kappaphycus alvarezii at the age of 25 days by the dilution factor, namely the 4000 colony 10-3, 10-4 and 10-5 of 80,000 colonies are 100,000 colonies, then at the age of 35 days with a 10-3 dilution factor of 1000 colonies , 10-4 ie 40,000 colonies and at the age of 45 days by the dilution factor yaitu7000 colony 10-3, 10-4 and 10-5 of 10,000 colonies are 500,000 colonies. Keywords: Sea Algae, Kappaphycus alvarezii, Fungi, tending age, colony.

This study aims to determine the effect of different stocking density on the growth and survival of fish fry carp (Osphronemus gouramy). This study used an experimental method. The design used was completely randomized design (CRD) with three treatments and three replications. The results showed that the absolute growth in length and the highest weight shown on treatment A (3 heads / l) respectively of 1.09 and 0.9 g cm, followed by treatment B (5 animals / l) respectively of 0.9 cm and 0.84 g, and the lowest in treatment C (7 animals / l), respectively for 0.86 cm and 0.8 g. Gurame fish seed viability during the study showed treatment A by 82.86% whereas 72.67% of treatment B and C treatment amounting to 83.33%. The results of this study continue with the LSD (Least Significant Difference) with a confidence level of 99%. Keywords: Gurame seedling; Osphronemus gouramy; survival; density; growth