Various natural feed extracts were tested to preserve semen quality in male rabbits under heat stress conditions. This study investigated the impact of orally administering tangerinein waste extract (TWE) on the semen quality of male rabbits. Twenty-four male California rabbits, aged 7-8 months and weighing an average of 3579.40±61.39 kg, were divided into four experimental groups with six rabbits in each group. The control group was administered 3.0 mL of distilled water, the second group received 2.0 mL/kg of body weight of TWE, the third group received 4.0 mL/kg of body weight of TWE, and the fourth group received 6.0 mL/kg of body weight of TWE. The rabbits were given the extract orally once daily for 8 weeks under summer conditions (32.50°C and 76% relative humidity). The administration of TWE significantly enhanced semen quality compared to the control group. In conclusion, oral TWE supplementation improved semen quality characteristics in the presence of heat stress during summer conditions.

The study was conducted to assess the honey bee pests, predators, and diseases in the selected districts of East Wollega Zone. A cross-sectional study design was used for this study to determine honeybee disease and pests. A questionnaire survey and laboratory diagnostic methods were used for the study. The questionnaire was administered to 104 beekeepers (97.1% males). Totally 52 beekeeping sites and two honeybee colony samples from each beekeeper sites, totally (104 honeybee colonies), were collected from frame box hives for laboratory diagnosis. The major cause of honey bee colony and yield decrease ranked by respondents were 1st pets and predators, 2nd Honeybee diseases and 3rd in appropriate agrochemical application. Majority of honeybee colonies were infested by ant 538(21.3%), by beetles 378(14.9%) and by wax moth 315(12.5%), in all districts. Among all pest and predators listed by respondents honeybee colonies were absconded by ants 213(8.4%), wax moth 194(7.7%) and by beetles 193(7.6%). After having identified the major pests, beekeepers were requested to rank them in order of their importance and the result indicated that Ants (1st), beetles (2nd), Wax moth (3rd) and honey badgers (4th) were the most harmful pests in order of degree of their importance. 52 beekeeping sites and 104 honeybee colonies were examined for major honeybee parasites (Varroa mites, bee lice, and tracheal mites), adult honeybee diseases (Nosema and Amoeba) and brood diseases (Chalk brood, American and European Foul brood) with their prevalence in the study area. However, AFB, EFB, SBD, and tracheal mite was not confirmed during the study period.

The aim of this study was to measure pelvic area in maiden Dorper ewes and to determine its effect on lambing ease, birth aid, parturition period and pelvic area to lamb weight ratio. The ewes’ pelvic dimensions as well as the newborn lambs’ external body measurements were taken. The young Dorper ewes (369) 9.31 months old, weighing approximately 52.32 kg were used for this study. Pelvic area of the young Dorper ewes measured 33.45 ± 3.12 cm2 . The formula used to calculate the pelvic area was π x (Pelvic height/2) x (Pelvic width/2). The pelvic area of ewes born as one of twins measured bigger than that of a single born lamb. Young Dorper ewes took 52.22 ± 37.34 min (67% assistance) to lamb. Pelvic area to birth weight ratio was 9.69 cm2 to 1 kg lamb born in the Dorper ewes. Significant correlations between lambing ease score and other parameters were recorded in ewes and lambs. It was concluded that Dorper lamb parameters correlated between 20% to 80% with one another and the effect on lambing ease was influenced the most by the lambs’ head circumference and birth weight of the ewe with an R2 of 0.243.