Judul: Aplikasi DNA Barcode pada Penentuan Spesies Ikan Danau Laut Tawar, Nangroe Aceh Darussalam
Abstrak: Lake Laut Tawar is an isolated ancient lake without inlet and outlet streams that affect the origin of fish species. Morphological identification errors occured due to the phenomenon of cryptic or siblings species. Both of them could cause problems on synonym that are multiple names on one species or vice versa. This study applied the DNA barcoding technique with nucleotides differences and genetic distance for determining some species of freshwater fishes that found in Lake Laut Tawar. Seven samples were morphologically identified as five species which were included in four families. Based on COI gene analyses, those five species have been successfully identified into four species: Channa gachua, Xiphoporus helleri, Oreochromis sp. KM 2006, and Trichopsis vittata. One species that had been expected as Poecilia latipinna, turns out to be Xiphoporus helleri. Key word : Fish, Fresh water, Lake Laut
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Judul: Dna Barcoding Of The Freshwater Fishes From Java And Bali Island, Indonesia.
Abstrak: Diantara 899 spesies ikan air tawar yang dilaporkan dari hotspot keanekaragaman hayati Sundaland, hampir 50% adalah endemik. Integritas fungsional ekosistem perairan saat ini terancam oleh aktivitas manusia dan konversi lanskap yang menyebabkan penurunan populasi ikan di beberapa bagian dari Sundaland. Pulau Jawa, misalnya, mengalami pertumbuhan eksponensial dari populasi manusia mencapai 130 juta orang yang sekarang berbagi 130.000 km2. Persediaan ichthyofauna Jawa telah terputus dan pengetahuan taksonomi tersebar dalam literatur. Penelitian ini menyediakan perpustakaan referensi DNA barcode untuk ikan perairan di daratan Pulau Jawa dan Bali dengan tujuan untuk merampingkan persediaan ikan di bagian Sundaland. Karena kurangnya checklist yang tersedia untuk memperkirakan cakupan taksonomi dari penelitian ini, checklist disusun berdasarkan katalog online. Sebanyak 95 situs yang dikunjungi dan perpustakaan termasuk 1.049 DNA barcode untuk 159 spesies berkumpul. Jarak tetangga terdekat adalah 28 kali lipat lebih tinggi dari jarak rata-rata maksimum intra-spesifik dan kesenjangan DNA barcode diamati. Daftar spesies dengan DNA barcode ditampilkan perbedaan besar dengan daftar yang disusun di sini karena hanya 36% dan 60% dari spesies yang dikenal yang terkoleksi masing-masing di Jawa dan Bali. Hasil ini kontras dengan sejumlah besar kejadian baru dan grafik kurva akumulasi untuk kedua spesies dan genera. Implikasi dari studi untuk persediaan berkelanjutan dari ikhtiofauna Jawa dan Bali ini dibahas.
Keyword: BOLD, COI, iktiofauna, perpustakaan referensi

Judul: Dynamic New Keynesian Model for Unemployment and Inflation Rate.
Abstrak: This paper deals with a scientific analysis of the equilibrium level of hiring, employment and unemployment. The basic model being used is a standard new Keynesian model, which states that utility function depends on consumptions and working hours. Utility maximization refers to a standard labour supply equation, with the marginal cost’s dynamics on new Keynesian model simply reflects movements in real wages and productivity. Furthermore, trade-off between output and inflation stabilization can be considered using the new Keynesian Phillips curve. Dynamic general equilibrium model is a model that can be used to study interactions between market imperfections and nominal rigidities, which is capable of overcoming the main shortcoming of the standard new Keynesian model. In the general equilibrium model there are three groups of the economy agents, namely households, firms and monetary authority. The results of this research science that bargaining processes between firms and workers will yield optimal wage. Increase in labour will cause wages to fall, but the unemployment rate can be reduced. An increase in the firm’s monopoly power will shift the labour demand curve downward, which will reduce the number of workers that firm is willing to hire for any given bargained wage.
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