ABSTRAKPenelitian ini bertujuan untuk mempelajari tingkat kejadian kawin berulang pada ternak sapi perah di daerah tropis. Penelitian ini merupakan studi awal yang dilaksanakan di Kabupaten Sinjai, Indonesia. Sebanyak 82 ekor ternak sapi perah pada lima kelompok tani/ternak digunakan dalam penelitian ini. Sebanyak 75,6% dari 82 ternak sapi perah mengalami kebuntingan setelah beberapa kali dilakukan inseminasi buatan (IB). Tingkat kejadian kawin berulang pada daerah ini sangat tinggi (62%). IB pertama setelah melahirkan, angka konsepsi pada IB pertama, dan jarak antara melahirkan dan kembali bunting adalah 62,5±15,2 hari, 0%, dan 202,8±150,0 hari. Hasil penelitian menunjukkan bahwa tidak terdapat perbedaan yang nyata antara ternak yang kawin berulang dan yang normal terhadap IB pertama setelah melahirkan (60,4±15,2 hari vs 68,3±28,6 hari). Namun demikian, ternak sapi perah dengan fertilitas normal hanya membutuhkan 123,3±52,9 hari untuk kembali bunting dan 2,4±0,8 kali inseminasi per kebuntingan, sedangkan ternak kawin berulang membutuhkan lebih banyak waktu (222,9±134,1 hari) untuk kembali bunting dan inseminasi per kebuntingan (4,8±0,9 kali). Sebagai kesimpulan adalah bahwa penampilan reproduksi ternak kawin berulang sangat rendah sehingga menurunkan penampilan reproduksi ternak secara keseluruhan. Kata kunci: sapi perah, tropis, kawin berulang, penampilan reproduksi ABSTRACTThe objective of this study was to investigate the incidence of repeat breeding in dairy cows under tropical condition. This was a preliminary study conducted in Sinjai Regency, Indonesia. A total of 82 Holstein Friesian lactating cows from five dairy farmer groups were used in the present study. Of the 82 cows, 75.6% eventually became pregnant after repeated inseminations (AI). The incidence of repeat breeding in this area was very high (62%). Days in milk (DIM) at first AI, first AI conception rate, and calving to conception interval were 62.5±19.3 days, 0%, and 202.8±150.0 days, respectively. There was no difference in DIM at first AI between repeat breeders and normal fertility cows (60.4±15.2 days vs 68.3±28.6 days). However, normal fertility cows required only 123.3±52.9 days to conceive and 2.4±0.8 inseminations per pregnancy, whereas repeat breeders required significantly more days to conceive (222.9±134.1 days) and more inseminations per pregnancy (4.8±0.9). In conclusion, repeat breeder dairy cows under tropical condition had very poor and reduced reproductive performance.

Goats are one of the mainstay commodities for farmers in rural areas, especially in several development centers in the West Sulawesi region, Indonesia. Generally the local goats that are kept are Kacang goats which are the type of meat production, but since the introduction of the Etawa breed most of the goat population that is currently being kept is from the Peranakan Etawa (PE) goat which is a cross between Kacang and Etawa goats which later develop into dual-purpose goats (meat and milk). The purpose of this study was to characterize the phenotypic (qualitative and quantitative) properties of Peranakan Etawa (PE) goats which were maintained by communities in the West Sulawesi region, Indonesia. This study used a survey method by identifying the qualitative and quantitative performance of the PE goat population. Characterization activities carried out were to identify the performance criteria of qualitative traits which included the characteristics of coat color, horn and ear shape and quantitative properties such as body weight, height, body length and chest circumference and chest width. A total of 113 goats (111 females and 2 male Peranakan Etawa breeds) were selected to be used as samples from the existing goat population. Peranakan Etawa breeding performance based on morphometric data included the characteristics of shoulder height (67.98 ± 5.61 cm), back height (71.34 ± 5.73 cm), body length (71.70 ± 6.46 cm), chest circumference (72.19 ± 6.46 cm), chest width (15.41 ± 1.86 cm) and body weight (33.04 ± 6.09 kg). The qualitative and quantitative performance of Etawa breeds in West Sulawesi is very diverse and need genetic improvement to meet Indonesia National Quality Standards (SNI).

Bali cattle is one important native cattle breeds of Indonesia which are contributing to the development of livestock and devote meat production. The aim of this study was to evaluate the genetic profiles using of mtDNA D-loop method in Breeding centers Bali cattle which consist BPTU Pulukan (Bali), BPTHMT Serading (West Nusa Tenggara) and VBC Barru district (South Sulawesi). The complete D-loop sequences, 1145bp in length, 48 individual sample from three breeding centers (24 males and 24 females) were analyzed. mtDNA D-loop amplification were performed by Polymerase Chain Reaction (PCR). The Molecular data of the D-loop mtDNA sequences were aligned and analyzed with reference (Bos indicus and Bos taurus) from GenBank using Basic Local Alignment Search Tool (BLAST) and MEGA version 5.0 software. The analyzedsequences length of the D-loop mtDNA was performed on 410 bp. The result of the mtDNA D-loop showed that there were 84 site varation were 2 site deletion, 8 site insertion and 74 site substitution of mtDNA D-loop Bali cattle. The nucleotide sequences of Bali cattle had a common Bali cattle in BPTU to BPTHMT with genetic distance more closely than the Bali cattle of VBC. It can be concluded that D-loop mtDNA could be used as potential candidate marker to differentiate and grouping in breeding centers of Bali cattle.

This research aimed to identify morphological characteristics Bali polled cattle and to know the mating behavioral characteristics of Bali polled male. Morphological characteristics research used 100 head samples, including 11 head of polled cattle and 89 head of horned cattle. Identification of morphological characteristics using t-test independent sample using analysis Completely Randomized Design. Mating behavioral characteristics research used 5 head samples, including 3 head of polled cattle and 2 head of horned cattle. Mating behavioral characteristics were analyzed by several parameters: the first time teasing a teaser (second), when flehmen arise (second) and frequency or number of flehmen (times)The results showed that the morphological characteristics Bali polled cattle were not significantly different with Bali horned. The mating behavioral characteristics of Bali polled cattle were not significantly different with Bali horned.

Contraception is a way to prevent the fusion of mature egg cell and sperm during the intercourse, so the fertilization will not occur. Some contraceptive methods in small animals have been evolved. This research aimed to determine the effects of kapok seed (Ceiba pentandra Gaertn) extract as contraception agent to the quality of spermatozoain domestic cats. The animals were divided into four group with each group consisted of six male cats. Group I, II, III was designated as the treatment groups and IV as the control group. The cats were given the emulsion of kapok seeds extract orally with concentration of 0,1%  b/v, 0,71 mg/kg BB, 0,36 mg/kg BB and 0,21 mg/kg BB doses. This study used Randomized Complete Random Design (RAL) design from sperm quality data and used ANOVA statistic test. The result showed that the concentration of sperm decreased in the treatment groups compared with the control group. Statistically, the sperm concentration decreased significantly (P < 0,05) between the control group and treatment groups. The average motility in low and medium doses was above 40% while it was below than 40% in the high doses group. Based on the results, the granting of kapok seed extract inhibited the viability of spermatozoa of cats with significant results (P < 0,05). Sperm abnormalities in this study was obtained from the control group with percentage average of 1 % , while it was significantly increased in the treatment groups marked by abnormalities in the shape of the head and tail of the spermatozoa. These results suggested that kapok seed extract can be used as one of the contraceptive agents in domestic cat (Felis domestica) because it can decrease the sperm quality significantly.