In this study, sh oil was used as an omega-3 fatty acids source in pregnant goat's rations in the different periods of pregnancy on mature male offsprings performance. Forty-seven male goat kids (84.6 ± 2.44 days or days old; 14.5 ± 3.09 kg body weight) were housed in individual pens and to evaluate live weight, feed consumption, serum biochemical parameters, carcass performance and meat quality characteristics for 56 days. Supplementation of sh oil to Anaç goats dam ration during the gestation periods decreased the fattening live weight and increased feed consumption (p=0.09), while body weight and feed conversion rates were not affected by experimental treatments (p=0.62, p=0.90). Fish oil increased serum AST, glucose, total protein, and globulin concentrations (p=0.02, p=0.01, p=0.03, p=0.02), while decreased heptadecanoic acid, oleic acid, linoleic acid, docosahexaenoic acid, and total mono-and polyunsaturated fatty acid concentrations in M. longissimus dorsi muscle (p=0. 09, p=0.03, p=0.10, p=0.02, p=0.02, p=0.09). As a result, it has been thought that the use of liquid sh oil as an omega-3 source in goat's ration during gestation may negatively affect the fetal development of male kids, but it has the ability to eliminate this negativity by improving post-weaning performance. Determination of Biochemical ParametersIndividual blood samples were taken from the vena jugularis with serum tubes containing gel (9 ml, Ayset, Turkey) before morning feeding at the beginning (day 1), middle (day 28) and end (day 56) of the fattening period.The collected blood samples were transported to the Department of Feeds and Animal Nutrition Laboratory rapidity, where they were centrifuged at 4°C and 4000 rpm for 15 minutes (Universal 320R, Hettich, Germany), and the obtained sera were transferred into 1.5 ml Eppendorf tubes with the protocol number, and they were stored at -20°C until analyses. Aspartate aminotransferase (AST), alanine aminotransferase (ALT), gamma-glutamyl transferase (GGT) and alkaline phosphatase (ALP) activities, albumin, total protein, total cholesterol, glucose, triglycerides, magnesium, calcium concentrations in sera were detected on a biochemistry analyzer (BS-120 Vet, Mindray, China) with the commercially available kits provided by the manufacturer of the analyzer.Globulin level was calculated by subtracting albumin value from total protein value. Collection of Data Related to Carcass and Meat QualityAt the end of the fattening period, 5 kids from each treatment group having live weight close to mean live weight were slaughtered in a private slaughterhouse.After slaughter, slaughter weight, skin, heart + lung (set), liver and hot carcass weights were recorded. The carcasses were stored at +4°C for 24 hours in a cold storage room. At the end of this period, cold carcass, fat around kidneys, cervical (neck), thigh, shoulder head, arm, lumbar (waist) and ank weights were determined (Darcan et al, 2006;Atay et al, 2007).Color, pH, texture and fatty acid analyses were performed on 15 gr muscle samples take...

The livestock sector plays an important role in climate change by contributing to anthropogenic greenhouse gas emissions. Studies to reduce greenhouse gas emissions in production systems of ruminant animals are of particular interest all over the world. Methane gas is formed as a result of microbial fermentation of hydrolyzed carbohydrates such as cellulose, hemicellulose, pectin and starch in the rumen. Ruminants contribute approximately 16% of global greenhouse gas emissions and 33% of global anthropogenic methane emissions. Considering its radioactive effect and global warming potential, it is estimated that the life of methane in the atmosphere, which is an important factor, will reach its half point in 12.4 years. With the increase in the world's population, the demand for animal products for nutritional purposes will need more animals and therefore total methane emissions will increase. Reducing methane emissions without reducing animal production is of critical value. In this review, methane release from ruminant animals, its reduction ways and measurement methods were examined.