4 research outputs found
Growth of
No full textConstraints on the seaweed culture in Indonesia until now still rely on seeds obtained by vegetative propagation and have poor quality, which often causes a decrease in genetic variability. Planting seaweed seedlings from tissue cultures that have been acclimatized in a greenhouse laboratory is believed to improve the quality of the seaweed seeds. This research aimed to observe the growth of tissue culture acclimatized Eucheuma cottonii seaweed seedlings to different rearing times in greenhouses applied to floating raft cages. This study used a completely randomized design (CRD) with three treatments and three replications. Acclimatization treatment was conducted for 2 weeks, 4 weeks, and 6 weeks. Seaweed seedlings acclimatized in the greenhouse are reared on bamboo floating rafts in the sea, with an initial weight of 5 grams each. The length of maintenance at sea is 28 days. The resulting daily growth rate in two-week acclimatization was 2.92%, the four-week treatment was 2.93%, and the six-week treatment was 2.57%. in raising seedlings at sea, the highest daily growth rate value was in the four-week treatment of 7.25%, followed by the two-week treatment of 7.11% and the six-week treatment of 6.43%
Nutrient digestibility and enzyme activity of microbial floc,
No full textCobia is a relatively new species of marine carnivorous fish with high aquaculture potential because of its fast growth (4-6 kg in a year) and ability to adapt and reproduce in the cultivation environment. This study aims to evaluate the nutrient digestibility and enzyme activity of cobia juveniles fed pelleted feed with microbial floc meal (MF), microalga Tetraselmis chuii (MT) meal, and microalga Spirulina platensis (MS) meal. Fish were fed pellets twice a day at satiation. The results showed that MS feed had higher and significantly different (p<0.05) of protein digestibility, enzyme activity, amylase and lipase, glycogen and lipid in the liver of juvenile cobia than MF feed. These two raw materials generally had no negative effect on cobia juvenile growth. Conversely, the value of nutrient digestibility and enzyme activity of MT feed could not be determined because the fish did not consume the feed
The impact of different coastal locations on the growth and Land suitability tissue culture on the Lampung Coast, Indonesia
No full textThis research was conducted at three different locations in the coastal waters of Lampung Indonesia, namely Hurun, Ruguk, and Pahawang, for one- month (March – April) 2021. The cultivation method used is the Long Line method, consisting of 20 points across four lines, with an initial weight of 50 g of seedlings per planting point. A land suitability analysis was conducted by scoring method (23–45), followed by observation of seaweed growth in each location. The result of observation and assessment of land suitability shows that the waters of Ruguk with a score of 38 and the waters of Hurun with a score of 34 are appropriate criteria for seaweed cultivation while the waters of Pahawang are less suitable criteria by the score of 28. receiving a score of only 28. The growth of seaweed, characterized by weight gain, absolute growth, and specific growth rate, was different among locations. The best results were obtained in Ruguk, which achieved a total production of 26,700 g/m and a daily growth rate per month of 8.54%, followed by Hurun, with a total production of 13,680 g/m, and an average daily growth rate per month of 6.32%. Pahawang had the lowest production yield of 9,900 g/m, with an average daily growth rate per month of 5.35%. The assessment of land suitability analysis is very important in land planning and management so that land use can be sustainable and by local environmental characteristics
The impact of different coastal locations on the growth and Land suitability tissue culture on the Lampung Coast, Indonesia
No full textThis research was conducted at three different locations in the coastal waters of Lampung Indonesia, namely Hurun, Ruguk, and Pahawang, for one- month (March – April) 2021. The cultivation method used is the Long Line method, consisting of 20 points across four lines, with an initial weight of 50 g of seedlings per planting point. A land suitability analysis was conducted by scoring method (23–45), followed by observation of seaweed growth in each location. The result of observation and assessment of land suitability shows that the waters of Ruguk with a score of 38 and the waters of Hurun with a score of 34 are appropriate criteria for seaweed cultivation while the waters of Pahawang are less suitable criteria by the score of 28. receiving a score of only 28. The growth of seaweed, characterized by weight gain, absolute growth, and specific growth rate, was different among locations. The best results were obtained in Ruguk, which achieved a total production of 26,700 g/m and a daily growth rate per month of 8.54%, followed by Hurun, with a total production of 13,680 g/m, and an average daily growth rate per month of 6.32%. Pahawang had the lowest production yield of 9,900 g/m, with an average daily growth rate per month of 5.35%. The assessment of land suitability analysis is very important in land planning and management so that land use can be sustainable and by local environmental characteristics
