Judul: Karakteristik Fenotipe Rumput Laut Gracilaria spp. yang Dibudidaya pada Salinitas Berbeda di Tambak Desa Pantai Sederhana, Muara Gembong
Abstrak: Gracilaria spp. is an euryhaline species which can live in the marine and brackish water. Developing Gracilaria spp. in Bekasi is very potential activity because this seaweed can be cultured in ex- shrimp ponds by polyculture systems. The objective of this research is to evaluate the performance of Gracilaria spp. based on phenotype morphological characteristics and its relationship with shrimp pond water quality. Sampling was done at 3 shrimp ponds with a salinity range of 13.7-19.2 g/kg. Phenotypical characteristics Gracilaria spp. consisted of colour and thallus morfometrics, while measurement of water quality consisted of physical and chemical characters of shrimp pond. The result shows that Gracilaria spp. generally have light brown colour and at salinity higher than 13.7 g/kg the number of secondary thalluses increased, the distance between internode tertiary thallus declined, and the number of ramification index increased. Salinity showed a positive correlation with remification index which was 0.571
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Judul: Keragaman Fenotipe Rumput Laut Gracilaria spp. yang Dibudidayakan di Tambak Desa Lengensari, Subang
Abstrak: Terdapat kendala produksi bagi industri pengolahan rumput laut yang ada di Indonesia akibat kualitas Gracilaria yang tidak konsisten. Kualitas Gracilaria ditentukan, salah satunya oleh kualitas bibit, sementara itu terdapat beragam kualitas bibit yang dipengaruhi oleh keragaman fenotipe. Penelitian ini bertujuan mengumpulkan informasi mengenai keragaman fenotipe rumput laut pada tambak budidaya Gracilaria spp. di Desa Langensari, Kecamatan Blanakan, Subang, Jawa Barat sebagai data dasar pendugaan produksi dan kriteria mutu rumput laut. Kaitan antara keragaman fenotipe dan kondisi lingkungan perairan tambak di mana rumput laut dibudidayakan juga dianalisis. Sampel rumput laut Gracilaria spp. dikoleksi dari 12 lokasi pada empat tambak, yaitu di inlet, middle, dan outlet. Empat petak tambak yang dibedakan berdasarkan tingkat salinitas, yakni 4,0-4,4; 4,1-5,8; 6,5-7,4; dan 11,7-11,9 ppt. Sampel rumput laut selanjutnya diamati warnanya, ditimbang bobotnya, dan diukur diameter talus, panjang talus, internode talus, dan dihitung percabangannya.
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Judul: Truncated Stop Loss as a Optimal Solution of Reinsurance Agreement in One-Period Model
Abstrak: Reinsurance is one of risk management efforts of an insurance company, which is called the cedent. Similar with insurance, reinsurance constitutes the cedent to pay the premium. We consider one-period reinsurance model and derive a rule which minimizes the ruin probability of the cedent for a fixed reinsurance premium. Therefore, it is needed to construct an optimal reinsurance agreement for the cedent. The premium is calculated according to four different principles, i.e. economic, generalized zero-utility, Esscher, and mean-variance principles. Stop loss is a reinsurance contract which protect the insurance company for losses that exceed a certain amount. The result of this research shows that a truncated stop loss is an optimal agreement in the class of all reinsurance contracts with various premiums calculated using above mentioned principles.
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