Judul: Karakteristik Gen Cytochrome Oxidase subunit I (COI) Tiram Daging dari Genus Crassostrea sebagai Identitas Jenis di Delta Cimanuk, Jawa Barat
Abstrak: Tiram termasuk ke dalam Genus Crassostrea yang merupakan jenis kerang-kerangan yang hidup sebagai bentos di perairan pada kondisi substrat dan lingkungan yang sama akan menunjukkan respon berupa perubahan morfologi yang hampir mirip. Banyaknya jenis tiram yang memiliki bentuk yang mirip seringkali menjadi hambatan untuk membedakan jenis Crassostrea melalui identifikasi secara morfologi. Tujuan dari penelitian ini adalah untuk mengidentifikasi jenis tiram yang terdapat di perairan Delta Cimanuk melalui analisis morfologi dan keragaman nukleotida gen Cytochrome Oxidase subunit I (COI), sebagai informasi dasar dalam pengelolaan dan konservasi yang tepat sasaran. Hasil identifikasi secara morfologi menunjukkan bahwa terdapat dua spesies dari Genus Crassostrea yakni Crassostrea iredalei dan Crassostrea gigas. Identifikasi spesies melalui teknik DNA Barcoding menunjukkan bahwa terdapat satu jenis tiram dari Genus Crassostrea yakni Crassostrea iredalei dengan tingkat keakuratan sebesar 99,5%.
Keyword: Crassostrea, gen COI, identifikasi molekuler

Judul: Identifikasi Molekuler Undur-Undur Laut dari Perairan Pantai Cilacap Berdasarkan Marka Gen Cytochrome Oxidase Subunit I (COI)
Abstrak: Mole crab (Albunea symmysta) as an infaunal organism inhabits tidal-exposed sand sediment. Like other aquatic organisms, mole crab is destined to be cryptic species and complex species often leading to morphologically misidentification. Taxonomic identification for genus Albunea was uncertain due to variation in morphology. This study was aimed at identifying and analizing the phylogenetic relationship A. symmysta from Cilacap coastal waters based on molecular genetic marker Cytochrome Oxidase subunit I (COI). Isolation and extraction resulted in two intact DNA product which were amplified using universal COI primer. There were 650 bp nucleotide sequences. COI gene A..symmysta was aligned with other species catagorized as ingroup and outgroup (family Hippidae) acquired from GenBank. Alignment was performed using MEGA 5.0 software. Construction of phylogeny tree showed distinction between Albuneidae and Hippidae. There were 158 specific nucleotides in A. symmysta.
Keyword: molecular identification, COI gene, A. symmysta

Judul: Zero-inflated negative binomial models in small area estimation.
Abstrak: The problem of over-dispersion in Poisson data is usually solved by introducing prior distributions which lead to negative binomial models. Poisson data sometime is also suffered by excess zero problems, a condition when data contains too many zero or exceeds the distribution's expectation. Zero Inflated Negative Binomial (ZINB) method can be utilized to solve such problems. This paper demonstrates the adaption of ZINB methods in Small Area Estimation with excess zero data. It is shown that the excess zero problem has substantially influenced the Empirical Bayes (EB) estimates, and the adaption of ZINB methods has improved the precision and reliability of the estimates. Key Words: Small Area Estimation, Zero-Inflation, Poisson-Gamma, Negative Binomial Regression, Empirical Bayes
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