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This study was conducted to evaluate the efficacy of reducing GnRH dose on the formation of ovulation and conception, and sizes of the ovarian structures following an Ovsynch program in lactating cows. The cows were allocated randomly to two treatment groups (full dose; FD, n=20 and half dose; HD, n=20). Cows in the FD group were treated with 10.5 µg buserelin acetate on day 0, with 0.150 mg D- cloprostenol 7 d later and with 10.5 µg buserelin acetate 2 d later. Estrous cycles in HD group were synchronized using the same scheme as FD-treated cows, but the dose of buserelin acetate was reduced to 5.25 µg at both GnRH administration times. Ovarian structures were monitored by ultrasound with a 6-8 MHz linear trans-rectal probe on days 0, 7, 9, 10, and 11. Cows were inseminated at the 16-20 h after second GnRH administration. No significant differences were observed in the dominant or ovulatory follicle diameters in FD and HD groups. Ovulation incidence from second GnRH injection by the 24 hour after fixed-time AI did not differ between FD (85 %) and HD (90 %) groups. Also, the conception percentages did not differ statistically between the HD (50%) and FD (40 %) groups.
This study is one of very few studies which have investigated the effect of reducing doses of buserelin acetate on the follicular development, ovulation and conception rates in the Ovsynch program of dairy cows.
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Enteric Redmouth (ERM) disease is a serious systemic infection due to a gram-negative bacterium (Yersinia Ruckeri) which causes significant economic losses in salmonid aquaculture all over the world. This disease is called “Red-mouth” for the reddening of the mouth. Other clinical manifestations of this disease are: exophthalmia, ascites and haemorrhage with ulceration of palate, gill and operculum resulting in anorexia. Although this disease has been reported in other fish species, rainbow trout (Oncorhynchus mykiss) are particularly susceptible to ERM. Rainbow trout is one of the most popular fish species in nature and in many countries it is also recognized as cultivated/farmed fish species, due to its fast growth and excellent nutritional quality. The target of this research being undertaken is to analyze the chemical-nutritional characteristics and evaluation of the oxidative processes in samples of rainbow trout fish affected by ERM compared to the healthy group. The results of analysis show significant differences concerning the contents of some qualitative and chemical-nutritional parameters in fish-meat samples belonging to animals that have recovered from the “red-mouth” disease and healthy ones. Despite this, the unhealthy rainbow trouts are good source of nutrition, similar than healthy trouts.
This study is one of the very few studies evaluating nutritional characteristics of rainbow trout samples affected by the "Red-Mouth Disease" compared to healthy trout samples