the present investigation aimed to conduct a genetic study of dairy cattle and buffalo bulls based on economic traits and their phenotypic correlation. the means of various economic traits in both the species are presented. cattle bulls reported a better libido score, flehmen response, requirement of mounting stimulus and semen volume, conception rate and expected predicted difference for milk ...

In the present study, 12 Hereford bulls approximately 22.5 mo of age were individually introduced to a restrained nonestrous stimulus female for 15 to 30 min under four treatment conditions: (1) without prior sexual stimulation and visually isolated from male conspecifics (control), (2) being watched by another male during matings, (3) after observing the copulatory activities of another male a...

This study compares the courtship and mounting behaviour of Bos indicus bulls in single- and multiple-sire groups in Costa Rica (latitude 10 degrees 25'N, longitude 84 degrees 32'W, annual precipitation of 3096mm, temperature of 24 degrees C and humidity of 85.3%). Four, 3-4 year-old Brahman bulls with previous sexual experience were used to sire a group of 120 multiparous cows (average of 128 ...

Descriptions of reproductive behavior of equids under free-running conditions are available in a number of resources.* These can be very instructive toward understanding the basic nature of stallions and how behavior varies under domestic breeding conditions. Most domestic stallions are handled under halter for live breeding or collection of semen. As opposed to the full complement of harem for...

Effects of the opiate agonist, morphine, and antagonist, naloxone, on LH release, courtship behavior and ejaculation frequency of mature, sexually active or sexually inactive rams were investigated. Plasma LH concentrations were monitored from blood samples collected every 15 min for 10 hr (0800 to 1800 hr) from eight rams that were isolated from or in contact with estrous females. Plasma LH co...

Successful communication is critical to the fitness of individuals and maintenance of populations, but less is known regarding the social contexts and reactions to scent marking by other individuals in solitary carnivores, including pumas. We evaluated the responses of resident male pumas to visitation and scent marking by potential competitors (other male pumas) and potential mates (female pum...

Some of the techniques that may be used to study social, reproductive, and ingestive behavior in horses are described in this paper. One of the aspects of equine social behavior is the dominance hierarchy or patterns of agonistic behavior. Paired or group feeding from a single food source may be used to determine dominance hierarchies quickly. Focal animal studies of undisturbed groups of horse...

The Sumatran rhinoceros (Dicerorhinus sumatrensis) is on the verge of extinction in Malaysia. At the Sumatran rhinoceros Conservation Centre in Sungai Dusun, the reproductive behaviour of two female and two male rhinoceroses were studied for 8-10 months during attempts to breed them in captivity. Due to the paucity of scientific information on the reproductive biology of the Sumatran rhinoceros...

This study investigated the effect of a short term (2 weeks) supplementary feeding on sexual behavior traits of Ile-de-France rams during late spring. Ten adult rams were fed a basal diet composed of 0.5 kg of straw, 0.8 kg of hay, 0.27 kg of barley, 0.05 kg of molasses and 0.01 kg of a mineral and vitamins supplement per day providing approximately the neat energy for maintenance according to ...

In their natural ecosystems, adult male and female Asian elephants, Elephas maximus, live separately. For several weeks prior to ovulation, female elephants release a substance in their urine which elicits a high frequency of non-habituating chemosensory responses, especially flehmen responses, from male elephants. These responses occur prior to, and are an integral part of, mating. Using bioas...