Judul: Resilience and Growth Some Tilapia Strains in Acid Media. Supervised
Abstrak: Budidaya perikanan di daratan harus terus ditingkatkan akibat dari penggunaan wilayah daratan untuk berbagai aspek kehidupan. Lahan gambut tersebar di beberapa pulau di Indonesia. Namun masih sangat minim pemanfaatannya dalam bidang perikanan, karena memiliki tingkat keasaman yang tinggi dengan warna air kehitaman dan dengan kandungan oksigen yang rendah. Gambut tropika biasanya bersifat masam dengan kisaran pH sebesar 4 sampai 5. Penelitian ini bertujuan untuk mengkaji pemanfaatan air ber-pH asam sebagai media budidaya untuk pembesaran beberapa strain ikan nila, serta menentukan strain ikan nila yang memiliki ketahanan terhadap pH asam ditinjau dari kelangsungan hidup, pertumbuhan panjang dan bobot, efisiensi pakan, dan histologi insang ikan nila berbagai strain yang dipelihara di media ber-pH asam. Hasil penelitian menunjukkan ikan nila strain BEST dan GIFT tidak dapat bertahan hidup, yaitu tingkat kelangsungan hidup sebesar 0%. Sedangkan yang dapat bertahan hidup pada media asam adalah ikan nila Merah, dengan tingkat kelangsungan hidup sebesar 30%, laju pertumbuhan bobot 1,34±1,20%, laju pertumbuhan panjang 0,66±0,40%, dan efisiensi pakan 45,26±22,56% selama 30 hari pemeliharaan. Perlakuan pH asam pada media dapat menyebabkan kerusakan lamella insang, yaitu kerusakan berupa hiperplasia, hipertropi, fusi, nekrosis, hemorrage, dan lapisan epitel terangkat dengan tingkat kerusakan berbeda
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Judul: Kinerja Pertumbuhan Ikan Nila Oreochromis niloticus Strain BEST pada Media Pemeliharaan dengan Derajat Kemasaman Berbeda
Abstrak: In Indonesia, peat land has pH degree that is relatively high, ranged from 3-5. Tilapia which is one of the superior commodities, is expected to be introduced in peat land as well as conducted with catfish. In order that, the production of tilapia is able to be improved optimally in more aquaculture lands of Indonesia. The objective of this study is analyze the work of growth in BEST tilapia strain, include Survival Rate, Specific Growth Rate, the growth of absolute length, amount of feed consumtion, feed efficiency, rearing media with acidity degree 3, 4, 5, and 6. Tilapia strain BEST that are used in the study size from 4,52±3,9 cm long and 1,35±0,3 g weight. The tilapias were placed in 12 aquariums with 60x50x40 cm in size and density as many as 40 fish each. The feed is the made-up feed (pellet) and given 3 times a day at satiation. Based on the result of this research, at 3 and 4 acidity degree the BEST strain tilapia couldn’t survive, showed by 0 % of survival rate. At 5 acidity degree, the survival rate was 50,8% whereas at 6 acidity degree was 75%. Growth rate either length growth and Specific Growth Rate at 5 acidity degree was slower than 6 acidity degree. Besides the acidity degree treatment on media could caused damaged in gill microanatomy include the damage such as hypertrophy, hyperplasia, fuse and telangiektasis with diffrent level of damage.
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Judul: Analisis keamanan konstruksi fungsi hash berbasis sandi blok kunci simetrik (Kajian Teoritik)
Abstrak: Hash function is used to secure the integrity and authenticity of a massege, so that the message is save. The message which will be secured, will be attached to hash/message digest/digital signature value fro, the message. A secure hash function is the one which has pre-image resistance, 2nd pre-image resistance and collision resistance. Hash function has been classified into hash keyed function (Message Authentication Codes/MAC) and unkeyed (Modification Detection Codes/MDC)
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