This study was intended to determine the free testosterone levels and sperm quality of local rabbit that was given commercial feed supplemented cod fish liver oil. The experiment design that was used in this research was Complete Random Design (CRD) with four experiments of feed, i.e. commercial feed without cod fish liver oil (R-0) as control, commercial feed + 1,5% cod fish liver oil (R-1), commercial feed + cod fish liver oil 3% (R-2), commercial feed + cod fish liver oil 4,5% (R-3). The each experiment included eight rabbits and feed experiment was given starting by 13 weeks to 26 weeks years old. The variable that observed was free testosterone level and sperm quality of local rabbit. The data that was obtained to be analyzed with One Way Anova and if its contrast was done more test with Duncan's Multiple Range Test (DMRT). The result of this research was to show that supplementation of cod fish liver oil in commercial feed was to show the result that a real distinction of (P<0, 05) towards free testosterone level and sperm quality of local rabbit.
Rabbit is an alternative livestock that have a chance of being the source of healthy and high quality animal protein. One way to improve the productivity of rabbit meat is to improve the quality of male rabbits. Moringa leaves have androgenic effects by increasing testosterone, increasing blood flow to the male reproductive organs and stimulating the central nervous system to increase libido. The aims of this study were to find out the effects of moringa leaf meal substitution in commercial feed on the testosterone levels and mating capability of male rabbits. Twenty four of four months old male rabbits with an average live weight of 1200g were used in this study. There were four treatments in this study including 0% (K0) as control and 15% (K1), 30% (K2), 45% (K3) substitution of moringa leaf meal in commercial feed and each treatment consisted of six replicates. The treatments were carried out for two months. The variables measured were mating capability and testosterone levels in the blood. The results showed that there were significant differences (P <0.05) between all treatments (K1, K2, K3) and the control (K0). Substitution of commercial feed with moringa leaf meal in this study was able to increase the testosterone levels in the blood and mating capability of male rabbits. It was concluded that the moringa leaf meal able to substitute the commercial feed up to 45 % to improve the testosterone levels in the blood and mating capability of male rabbits. To get maximum the testosterone levels in the blood and mating capability of male rabbits it should be better substituted the commercial feed with moringa leaf meal as much as 35.07%
Seleksi merupakan salah satu tindakan yang dilakukan untuk meningkatkan mutu genetik suatu populasi ternak.Respon seleksi yang terjadi tergantung pada intensitas seleksi, heritabilitas dan simpangan baku sifat yang diseleksi.Simpangan baku sifat atau performans ternak yang diseleksi akan menunjukkan keragaman (variasi) sifat tersebutdalam populasi yang dikenal dengan koefisien variasi (keragaman). Penelitian ini bertujuan untuk mengetahuikoefisien keragaman dan efisiensi respon seleksi yang terjadi, bila seleksi dilakukan pada dimensi tubuh (panjangbadan, tinggi gumba dan lingkar dada) yang didasarkan intensitas seleksi dan estimasi heritabilitas yang samaterhadap semua dimensi tubuh yang diukur. Penelitian ini dilakukan secara purposive random sampling padalima kelompok ternak di lima kecamatan di kabupaten Jembrana. Jumlah induk sapi bali yang digunakan dalampenelitian ini sebanyak 275 ekor. Variabel yang diukur adalah panjang badan, tinggi gumba dan lingkar dada. Hasilpenelitian menunjukkan rataan panjang badan, tinggi gumba dan lingkar dada sapi bali induk di lokasi tersebutberturut-turut 117,19±8,84cm; 115,12±6,35cm dan 165,43±12,54cm dengan koefisien keragamannya berturut-turut7,54%; 5,52% dan 7,58%, sedangkan respon seleksinya berturut-turut 0,60cm; 0,76cm dan 1,25cm. Kesimpulanyang dapat diambil dari hasil penelitian ini adalah respon seleksi yang paling efektif untuk peningkatan mutugenetik dimensi tubuh sapi bali betina adalah terhadap lingkar dadanya.
Kata kunci: sapi bali, seleksi, respon seleksi
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