To determine the time taken for the output of spermatozoa by rams to respond to changes in the diet semen was collected twice daily for 63 days from two groups of rams; one received a high and the other a low plane of nutrition. 'The output of spermatozoa by rams in the two groups began to diverge at the seventh week of differential nutrition, whereas testicular size diverged after four weeks. ...

Fat tailed sheep breeds are known for their adaptation to nutritional stress, among other harsh production conditions. Damara sheep, native to Southern Africa, have recently been exported to other areas of the world, particularly Australia, aiming to produce lamb in semi-arid regions. Damaras have a unique hanging fat tail, a fat depot able to be mobilized under nutritional stress. In this arti...

The evaluation of monocytes recruited into the alveolar space under both physiological and inflammatory conditions is hampered by difficulties in discriminating these cells from resident alveolar macrophages (rAMs). Using the intravenous injected fluorescent dye PKH26, which accumulated in rAMs without labeling blood leukocytes, we developed a technique that permits the identification, isolatio...

A diallel cross involving three Moroccan breeds of sheep (Sardi, Beni Guil, and D'man) was analyzed by least squares procedures. A total of 456 ewes were mated to 22 rams and this resulted in 528 lambs born from 412 ewes. D'man ewes had by far the highest general performance as measured by total weight of lamb weaned, even though the average live weight per lamb was the lowest for the three bre...

M cKENZIE and Berliner (i937) have shown that under Missouri conditions rams decline in semen production during summer months, or when exposed to high environmental temperatures during other seasons. The deleterious effects of the summer season upon semen quality and pro. duction of rams has been found by Green (I94o), Phillips et al. {I943) and upon that of dairy bulls by Erb, Andrews, and Hil...

Most of FPGAs have Configurable Logic Blocks (CLBs) to implement combinational and sequential circuits and block RAMs to implement Random Access Memories (RAMs) and Read Only Memories (ROMs). Circuit design that minimizes the number of clock cycles is easy if we use asynchronous read operations. However, most of FPGAs support synchronous read operations, but do not support asynchronous read ope...

Ewe sexual preference depends on several factors; ram attractiveness is important. This work was carried out in the first week of September 2020 and repeated November 2021. For trial two rams were treated with 0.5 mg naloxone im for 15 days, control saline injections. Sexual studied synchronized ewes (n 0 12) displaying estrus at end treatment rams. Ewe’s proceptive receptive behavior noted. Pl...

We evaluated the efficiency of selection for body weight in a cooperative village breeding program for Menz sheep of Ethiopia under smallholder farming system. The design of the program involved organizing villagers in a cooperative breeding group to implement selective breeding of their sheep. The program was jump-started through a one-time provision of elite rams from a central nucleus flock,...

Melatonin (MEL) was evaluated for effects on LH, prolactin (PRL) and fertility in spring (Exp. 1, 2) and summer (Exp. 3 to 5). In Exp. 1, 17 ovariectomized ewes bearing estradiol implants were fed 3 mg MEL or vehicle for 44 d beginning May 1. Melatonin decreased (P less than .001) PRL levels but had no effect on LH secretion and response to GnRH. In Exp. 2, 12 ewes each received a 40-d MEL ear ...

The effects of feeding different levels of dried layer litter as a protein source on live weight, testicular weight, gonadal and epididymal sperm reserves of Yankasa rams was investigated in a 98day study. Twenty healthy Yankasa rams with clinically normal genitalia were divided randomly into 4 groups (A, B, C and D) of 5 rams each. Diets containing 12.11% CP, 14.96% CP and 17.94% CP were formu...