Judul: Kajian fisiologi reproduksi ikan gabus, Channa striata Blkr di dalam wadah dan perairan rawa sebagai upaya domestikasi
Abstrak: Tujuan penelitian ini adalah mengkasi beberapa hal berkenaan fisiologi reproduksi ikan gabus di perairan alami dan wadah budidaya serta pengaruh dari perlakuan yang seperti perubahan ketinggian air, kombinasi naungan dan substrat, kombinasi penyuntikan sGnRH-a+ad dan ketinggian air terhadap perkembangan gonad dan pemijahan ikan gambus didalam wadah budidaya.
Keyword: Reproductive Physiology, Swamp Area, Hormon Reproduksi, Domestication

Judul: Kajian Seksualitas dan Domestikasi Tahap Awal Ikan Gabus Hias (Channa limbata, Cuvier & Valenciennes 1831) asal Bogor, Jawa Barat.
Abstrak: Aktivitas penangkapan ikan di alam secara intensif di beberapa wilayah penyebaran ikan gabus menyebabkan penurunan populasi di beberapa wilayah di Indonesia. Praktik budidaya ikan dapat menyelamatkan ikan yang terancam punah dan memproduksi ikan yang terdomestikasi Penelitian ini bertujuan mengkaji tahapan domestikasi awal ikan gabus Channa limbata meliputi aklimatisasi dan status seksualitasnya sebagai dasar pengembangan budidaya ikan gabus hias. Hasil pengamatan dimorfisme seksual ikan C. limbata yang berupa 29 karakter morfometrik, 6 karakter meristik dan ciri lubang urogenital menunjukkan tidak adanya perbedaan nyata antar dua jenis kelamin. Aklimatisasi dilakukan selama 14 hari dengan pemeliharaan pada ukuran yang berbeda yaitu ukuran 50-100mm, 100-150mm dan >150mm. Nilai sintasan terendah pada aklimatisasi didapatkan pada kelompok ikan dengan ukuran >150mm sebesar 75%., The intensive fishing activities in several habitats of snakehead fish have led to a decline in populations in various regions of Indonesia. The practice of fish farming can help save endangered fish populations and cultivate domesticated fish. This research aims to study the initial domestication stages of Channa limbata snakehead fish, including acclimatization and their sexual status, serving as a foundation for the development of ornamental snakehead fish cultivation. Observations of sexual dimorphism in C. limbata involved 29 morphometric characters, 6 meristic characters, and characteristics of the urogenital pore, revealing no significant differences between the two genders. Acclimatization was conducted over 14 days, maintaining fish of different sizes: 50-100mm, 100-150mm, and >150mm. The lowest survival rate was observed in fish group larger than 150mm was at 75%.
Keyword: acclimatization, aquaculture, Channa limbata, domestication, dimorphism

Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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