Aim of study: To investigate the effect feeding foliage leguminous trees on growth rate, semen characteristics, and sexual behavior bucks.
 Area Northeastern Mexico (23°44' N, 99°8' W).
 Material methods: Twenty-two young goat bucks were randomly allocated to one four treatment groups: 33% alfalfa hay (dry matter basis), 33%; Acacia farnesiana; Leucaena leucocephala; or Prosopis laevi...

background: to ascertain the effects of tropical leaf meals on semen production and semen quality. objective: this study was conducted with the main objective of investigating the effect of neem leaf meal on physiological responses of rabbit bucks fed graded levels of neem leaf (azadirachta indica a. juss) meal. materials and methods: the varying levels of neem leaf meal (nlm) in the different ...

An artificial insemination (AI) program using cooled semen was evaluated over a 7-year period in Florida goats. The effect of the following variables on pregnancy rates was analysed: production system, year and season of AI, synchronisation treatment, bucks, AI technicians, semen deposition site, days in milk at AI, milk yield and parity. Animals were reared under field conditions on commercial...

A total of 120 ejaculates from six adult Black Bengal bucks were studied to determine the semen attributes and evaluate their fertility. The various semen attributes of fresh semen were volume, sperm concentration, mass motility, live spermatozoa and normal spermatozoa percentage. All the semen attributes differed significantly (P<0.05) except normal spermatozoa percentage between the bucks. A ...

The aim of this study was to determine if there is a seasonal pattern of reproductive activity in male Payoya goats and if this seasonality can be modulated by a higher level of nutrition. For a period of 16 months, 10 adult bucks were divided into two experimental groups that differed in their feeding level. The high nutrition group (H, n=5) received 1.6 times their maintenance food requiremen...

Individuals can increase their fitness by searching for mates of an appropriate quality. We here report the results of a five-year study on the behaviour of peri-estrous female fallow deer to document examples of apparent mate-searching and the context in which it occurs. Using direct observation of 266 tagged does we collected spatial and behavioural data of does and the bucks with which they ...

Two experiments were conducted to assess the effect of buck exposure to synchronize estrus in mature and pre-pubertal norgestomet-treated crossbred (criolloxdairy breeds) goats. In experiment 1, 100 mature goats (25 per group) under range conditions were either teased at 48 or 24h before Sincromate-B (SMB; 9 days treatment of 2mg norgestomet) implant withdrawal. A third group was exposed to buc...

Lighting system is a stimulant for reproduction in some species (Horses) and an inhibitor for others (Sheep). This study started on September 1(st) and planned to study the effects of different lighting regimes and melatonin treatment on the receptivity and performance of 78 (60-does and 18-bucks) New Zealand White rabbits, which were reared in a private Rabbitary in Menuofia Governorate, Egypt...

M., Gounelle, M., Russell S. S. Department of Mineral Sciences, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560 USA ([email protected]). Planetary Space Sciences Research Institute, The Open University, Walton Hall, Milton Keynes, Bucks MK7 6AA, UK. 3 Laboratoire d'Étude de la Matière Extraterrestre, Muséum National d'Histoire Naturelle, 57, rue Buffon, 75005 Par...

The cryoresistance of bucks’ semen collected by transrectal ultrasound-guided massage the accessory sex glands (TUMASG) and electroejaculation (EE) was compared during breeding season (Study 1) or late non-breeding 2). Semen from 10 Gabon bucks with both methods in each then frozen according to a standardized protocol. time required for ejaculation, number electrical pulses applied, sum applied...