51 research outputs found
PERTUMBUHAN, PRODUKSI BIOMASSA DAN KANDUNGAN KARAGINAN RUMPUT LAUT Kappaphycus alvarezii DENGAN BERBAGAI METODE BUDIDAYA DI DALAM EKOSISTEM PADANG LAMUN
No full textPenelitian bertujuan menentukan metode budidaya yang tepat yang menghasilkan pertumbuhan, produksi biomassa dan kandungan karaginan yang maksimal di dalam ekosistem padang lamun. Penelitian dilaksanakan pada bulan Maret sampai Juni 2011 di perairan Dusun Puntondo, Desa Laikang, Kecamatan Mangarabombang, Kabupaten Takalar, Sulawesi Selatan. Analisis kandungan karaginan rumput laut dan parameter kimia kualitas air dilakukan di Laboratorium Kualitas Air, Jurusan Perikanan, Fakultas Ilmu Kelautan dan Perikanan, Universitas Hasanuddin. Metode budidaya yang diterapkan sebagai perlakuan yaitu permukaan (20 cm di bawah permukaan air), metode lepas dasar (kedalaman 100 cm), dan metode dasar (pada sedimen dasar). Rancangan percobaan yang digunakan adalah rancangan acak lengkap (RAL) masing-masing 5 ulangan untuk setiap perlakuan. Data laju pertumbuhan dan produksi biomassa dianalisis dengan Analisis Ragam dilanjutkan dengan uji Tukey, sedangkan parameter kualitas air dianalisis secara deskriptif berdasarkan kelayakan hidup untuk rumput laut K. alvarezii. Hasil penelitian menunjukkan bahwa laju pertumbuhan harian, produksi biomassa dan kandungan karaginan tertinggi dihasilkan metode lepas dasar yakni masing-masing 1,54%/hari, 182,2 g dan 44,8%, sedangkan terendah metode dasar masing-masing 1,14%/hari, 124,4 g dan 39,9%. Hal ini disebabkan oleh intensitas cahaya matahari yang ditrerima oleh rumput laut pada lapisan air di atas dasar perairan (metode lepas dasar) optimal untuk metabolisme (proses fotosintesis dan penyerapan zat-zat hara berupa NH4+, NO3+, PO4- dan dan CO2). Pada metode dasar, intensitas cahaya rendah, sehingga penyerapan unsur hara dan proses fotosintesis agak terhambat, berakibat pada laju pertumbuhan, produksi biomassa, dan kandungan karaginan rendah, meskipun kandungan unsur hara pada dasar perairan cukup tinggi. Dekomposisi yang intensitf dari tallus oleh bakteri pada dasar perairan merupakan faktor lain penyebab rendahnya laju pertumbuhan, produksi biomassa dan kandungan karaginan rumput laut tersebut. Seluruh parameter kualitas air yang terukur berada pada kisaran yang optimal bagi pertumbuhan rumput laut
SPORE DISCHARGE AND DEVELOPMENT, AND CARRAGEENAN CONTENT OF SEAWEED Kappaphycus alvarezii ILLUMINATED WITH DIFFERENT LIGHT COLOURS
No full textKappaphycus alvarezii is tropical seaweed, the main carrageenan producer in the global trade. Study on the Spore Discharge and Carrageenan Content of Seaweed Kappaphycus alvaerzii Illumintaed with Different Light Colours was conducted in the Wet Laboratory, the Faculty of Marine Sciences and Fisheries, Hasanuddin University, Makassar, Indoneisa, and in the Seawater Recirculating Installation operated by CV. Rezki Bahari, Makassar, respectively. Carrageenan content of the algae was analyzed in the Water Quality Laboratory, Faculty of Marine Sciences Hasanuddin University. The study on the spore release discharge was considered as a preliminary attempt to produce high quality of K. alvarezii seeds in the coming years, while study on the carrageen content objected to produce K. Alvarezii with high carrageenan content through Indoor culture system. All light colours tried (white, red, yellow, green, and blue) resulted the spore discharge on the fifth day of the exeperiment. However, there was none plantlet produced with the green light. Carrageenan content tend to high with white light (68.71%) as well as green light (61.47%), followed by yellow light (54.09%). The lowest were with blue and red lights. Different on carrageenan content at different light colours due to the different on energy content of each light exposed as well as different in composition of photosynthetic pigments of Kappaphycus alvarezii (Eucheuma cottoni) in response to different energi of differs incoming light colours
EFFECT OF ECOLOGICAL FACTORS ON THE GROWTH AND CHLOROPHYLL A CONTENT OF SEAWEED Kappaphycus alvarezii IN CORAL REEF ECOSYSTEM
No full textThe research objctives are to determine influence of several physical and chemical factors on the growth and\ud
chlorophyll a content of seaweed Kappaphycus alvarezii cultured in the coral reef. The study was conducted\ud
at Laikang Bay, Jeneponto Regency, Indonesia, applied floating raft culture method. The study was designed\ud
with Block Pattern Factorial. Row spacing and culture depth above the coral reef were the factors examined.\ud
Higher gowth rate and chlorophyll a of the seaweed was obtained at culture in 5 m above the coral reef\ud
compared with those cultured in culture 2 m above the coral reef. Higher growth rate and chlorophyll a\ud
content was also obtained at more tenuous spacing plants compared with those tighter spacing plants.\ud
Because of optimal sunlight intensity reach the thallus and better nutrients supply for the thallus absorption,\ud
the chlorophyll a content was higher at 30 cm row spacing than at 20 and 10 cm. Therefore, K. alvarezii\ud
can only be cultured in coral reef ecosystem at 5 depth with 30 cm row spacing applying floating raft\ud
method. Highest growth rate and chlorophyll a content was obtained at culture on the 5 m depth coral reef\ud
with 30 cm row spacing Multiple regression showed daily growth rate and chlorophyll a content was\ud
positively correlated wih light intensity, nitrate, ammonium, calcium, and magnesium concnetration, and\ud
negatively correlated with sedimentatio
BEBERAPA PARAMETER KIMIA YANG MEMPENGARUHI PERTUMBUHAN RUMPUT LAUT MERAH Kappaphycus alvarezii (DOTY) DI PERAIRAN LEBIH-DALAM
No full textGrowth and Carrageenan from Kappaphycus alvarezii (Doty) at Different Depths and Their Possible Application in Other Locations
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Uptake of Nutrients N, P, K Seaweed of Kappaphycus alvarezii (Doty) Were Cultivated in Media with Different Concentrations of BAP
No full textThe results showed that in the first period the cultivation, the highest uptake of T-N (0.13
THE IMPACT OF SEAWEED FARMING ON THE PHYTOPLANKTON COMMUNITY STRUCTURE
No full textThis study was aimed to analyze the impact of seaweed farming on changes in the structure of phytoplankton communities on various ecosystems and their relationship with environmental factors. The study was conducted in May-October 2017 in the waters of Karampuang Island, Mamuju Regency. Plankton samples were collectedfromthreecultivationareas, namely areas with sandy bottom (control), seagrass beds, and coral reefs. In each area, three media were placed with a longline system, size 40 x 30 m2 (as replication). Sampling was carried out at the beginning before initiation of the cultivation and every two weeks after cultivation was started for 42 days. Phytoplankton sampling and measurement of environmental factors were carried out at fivesamplingpoints representing the cultivation areas. In sandy areas, sampling was also applied in areas outside the cultivation at a distance of 25m and 50m. Variance analysis was used to analyze differences in the species number and abundance of phytoplankton. Ecological indices was used to test phytoplankton biodiversity. PCA was used to analyze its relationship with environmental factors. Differences in the species number and abundance of phytoplankton between farming areas according to temporal scale were found. The high number and speciesabundance of phytoplankton were found in seagrass areas and significantly different from coral reefs and sandy area. Seaweed farming at the beginning of the farming period showed a positive impact by increasing the number of species and abundance of phytoplankton, but then decreased after entering Week 4-Week 6, along with the occurrence of ice-ice disease on the seaweed. Diversity index value was classified as medium with high equality without the dominance of particular species. The high number of species and abundance of phytoplankton occured at second weeks in all cultivation areas which are characterized by abundance of zooplankton with environmental characteristics, i.e. high DO and low PO4, NO3, andDOM
ESTIMATION OF ORGANIC WASTE LOADS FROM SHRIMP POND SUPERINTENSIVE THAT WAS DISPOSED IN THE LABUANGE BAY WATERS
No full textEnvironmental pollution in the form of organic waste containing nitrogen (N) and phosphate (P) sourced from superintensive shrimp pond cultivation due to much feed use is a severe problem in the development of superintensive technology in Indonesia. This study aims (1) to estimate the amount of feed wasted into the environment during cultivation in superintensive ponds and (2) estimate the amount of N and P waste that is wasted into the environment from superintensive cultivation. The research method is carried out in 3 stages; the first stage was carried out on a superintensive pond for 76 days by carrying out superintensive shrimp farming with a density of 600 tails / m2 then carried out observations of wasted feed. The second stage is to conduct laboratory-scale shrimp digestibility tests, and the third stage is laboratory-scale shrimp excretion research. The results showed that (1) the amount of feed wasted into the environment (un-eaten) amounted to 24.32% of the total feed provided. The burden of organic waste from superintensive ponds shrimp discharged into the waters of Labuange Bay is 3.89 tons/year consisting of organic waste containing N amounting to 3.61 tons/year with a mean of discharging to waters of 10.31 kg/day, and organic waste containing P of 0.28 tons/year with a mean discharge to the waters of 0.81 kg/day. These results indicate that the waters of Labuange Bay have experienced the pressure of organic waste originating from superintensive shrimp pond activities.Pencemaran lingkungan oleh limbah organik mengandung nitrogen (N) dan fosfat (P) yang bersumber dari tambak udang superintensif karena penggunaan pakan yang banyak merupakan masalah serius dalam pengembangan teknologi superintensif di Indonesia. Penelitian ini bertujuan untuk mengestimasi jumlah pakan yang terbuang ke lingkungan selama budidaya di tambak superintensifdan untuk mengestimasi jumlah limbah N dan P yang terbuang ke lingkungan dari kegiatan budidaya superintensif. Metode penelitian dilakukan sebanyak 3 tahap; tahap pertama dilakukan pada tambak superintensif selama 76 hari dengan melakukan budidaya udang superintensif dengan kepadatan 600 ekor/m2 selanjutnya dilakukan pengamatan pakan yang terbuang. Tahap kedua adalah melakukan uji kecernaan udang skala laboratorium dan tahap ketiga adalah penelitian ekskresi udang skala laboratorium. Hasil penelitian menunjukkan bahwa jumlah pakan tidak termakan yang terbuang ke lingkungan dari tambak superintensif sebesar 24,32% dari total pakan yang digunakan. Beban limbah organik dari tambak udang superintensif yang terbuang ke perairan Teluk Labuange sebesar 3,89 ton terdiri dari limbah organik mengandung N sebesar 3,61 ton/tahun dengan rerata buangan ke perairan 10,31 kg/hari, dan limbah organik mengandung P sebesar 0,28 ton/tahun dengan rerata buangan ke perairan 0,81 kg/hari. Hasil ini menunjukkan bahwa perairan Teluk Labuange telah mengalami tekanan limbah organik yang berasal dari kegiatan tambak udang superintensif
Carotenoid Content and Weight Gain of Caulerpa racemosa (Chlorophyta, Caulerpaceae) at Several Light Intensities
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