it is well established that reproduction is sensitive to the state of energy reserves, and that there is a balance between energy homeostasis and fertility. in this view, this study examined the effects of different diets on growth and reproductive performance of fresh water angelfish. twenty four pairs of angelfish (weighing 3.58 ± 0.24 g) were fed with four types of diets including live earth...

the reproductive performance of a dairy herd has a significant effect on the profitability of that herd. common measures of reproductive performance are days to first service, days to conception, calving interval, services per conception, conception rate, estrus detection rate, and pregnancy rate. most cow operations would benefit economically by reducing the number of operational days, decreas...

the study was carried out at agarfa atvet college dairy farm to evaluate the reproductive performance of holstein friesian× arsi and holstein friesian ×boran cattle. for the study, records compiled from 1983 to 2012 at the agarfa dairy farm were used as original data. the effects of breed, bloodlines, season and parity on the reproductive traits were evaluated. data were analyzed using the gene...

this study investigated the effect of dietary supplementation with calcium salts of fatty acids using 48 afshari ewes randomly allocated to four treatments. all groups used in flushing period and only the source of energy were different between rations. the ewes were divided into four groups: a-barely grain; group b-received 5% of csfa with source of flaxseed oil (w3); group c-received 5% of cs...

this study was carried out to investigate the relationship between early lactation curve parameters andcalving interval in holstein cows of iran. in order to describe the lactation curve, the incomplete gammafunction was fitted to 5,754,428 test-day milk records corresponding to 766,108 lactations on 315,634 cowsin 2,448 herds. cows with higher milk yield during early lactation had shorter calv...

objective: the aim of the present study was to evaluate artificial insemination techniques on reproductive performance in ghezel ewes synchronized with cidr during breeding season. methods: all ewes were treated with controlled internal drug release device (cidr) inserted into the vagina of the ewes for 14 days. all ewes were treated a single intramuscular (im) dose of pmsg was injected. in thi...

the aim of this study was to evaluate the reproductive efficiency of short and long term treatment with progestagens in addition to pregnant mare serum gonadotropin (pmsg) in arabian ewes during the non-breeding season. a total of 56 ewes were divided into three groups: in group i vaginal sponges (60 mg medroxy progesterone acetate; map) were applied and removed after 6 days; in group ii, vagin...

one of the most important aims of aquatic hatcheries is availability to mass produce of daphnia magna as a live food with high nutritional value in the shortest time. in the present study, d. magna fed with two freshwater green algae species, chlorella sp. and scenedesmus obliquus, enriched with different dosages of a mixture b group vitamins (0, 0.5, 1 and 2 ml.l-1) were compared at two stages...

this experiment was conducted to determine the reproductive performance of kurdi ewes which were artificially inseminated (ai). in total 240 kurdi ewes, weighing 49.5±2.5 kg were used in the trail. the ewes were allocated randomly to one of four groups (n=60/in each group). for synchronizing, controlled internal drug release (cidr) was placed in the vagina of all individuals for 14 days. after ...

The bio-stimulation technique offers a potentially useful and practical way for reproductive performance in rams. Reports on how bio-stimulation affects sexual potency rams are scarce: Knowledge of how rams respond to bio-stimulation is useful for persons who involved in semen collection; "hand" (controlled) mating, and the administration of sexual performance evaluations. The reduction of the ...