Abstract: A method involves at least measuring the weight quantity of at least one fatty acid (AG), derived from de novo synthesis, in a sample of milk from said ruminant and evaluating said quantity of methane according to the following formula: CH4=a*(de novo AG)+y*(BH AG)+z.

Abstract: The present invention relates in particular to a method to evaluate the quantity of methane produced by a dairy ruminant. The method comprises determination of the ratio between the quantity of fatty acids with 16 carbon atoms or less and the sum of the total fatty acids of the milk, said quantity of methane being defined by the following equation: Quantity CH4=(FA<C16/Total FAs)*a*(milk production)b in which: quantity CH4 (in g/litre of milk)=quantity of methane produced; FA<C16=quantity of fatty acids with 16 carbon atoms or less; Total FAs =total quantity of fatty acids; expression of the ratio (FA<C16)/(Total FAs) as a % of total FAs; milk production=quantity of milk produced in kg of milk/animal and per year; a and b are numerical parameters in which a lies between 10 and 13, and b lies between ?0.40 and ?0.45.

Abstract: The present invention relates in particular to a method to evaluate the quantity of methane produced by a dairy ruminant. It is notably characterized by the fact that it comprises determination of the ratio between the quantity of fatty acids with 16 carbon atoms or less, called FA<C16 and the sum of the total fatty acids of the milk, said fatty acids being found in the milk produced by said ruminant, said quantity of methane being defined by the following equation: Quantity CH4=(FA<C16/Total FAs)*a*(milk production)b in which: quantity CH4 (in g/liter of milk)=quantity of methane produced; FA<C16=quantity of fatty acids with 16 carbon atoms or less; Total FAs=total quantity of fatty acids; expression of the ratio (FA<C16)/(Total FAs) as a % of total FAs; milk production=quantity of milk produced in kg of milk/animal and per year; a and b are numerical parameters in which a lies between 10 and 13, and b lies between ?0.40 and ?0.45.

Abstract: The present invention relates to a method for determining, from a database, the amount of at least some fatty acids contained in various biological materials from a single animal raised for meat production. Said method can be used for determining the amount of both major and minor fatty acids, as well as the fatty acid content of another biological material from said single animal.

Abstract: A method involves at least measuring the weight quantity of at least one fatty acid (AG), derived from de novo synthesis, in a sample of milk from said ruminant and evaluating said quantity of methane according to the following formula: CH4=a*(de novo AG)+y*(BH AG)+z.

Abstract: The present invention relates to a method for determining the quantity of methane produced by a meat ruminant, such as a bovine, i.e., an animal raised and then slaughtered for the sale of its meat, characterized in that it consists in determining the quantity of at least one fatty acid (FA) contained in a reference tissue, namely muscle or adipose tissue, sampled from said ruminant after its death (in grams of fatty acids per kilogram of tissue) and calculating said quantity of methane (in grams of CH4 per kilogram of meat from the animal) according to an equation that is a function of said quantity of said FA and the category, age and weight of said animal, wherein the latter three criteria are determined at the time of the slaughter of said animal.

Abstract: The present invention relates in particular to a method to evaluate the quantity of methane produced by a dairy ruminant. It is notably characterized by the fact that it comprises determination of the ratio between the quantity of fatty acids with 16 carbon atoms or less, called FA<C16 and the sum of the total fatty acids of the milk, said fatty acids being found in the milk produced by said ruminant, said quantity of methane being defined by the following equation: Quantity CH4=(FA<C16/Total FAs)*a*(milk production)b in which: quantity CH4 (in g/litre of milk)=quantity of methane produced; FA<C16=quantity of fatty acids with 16 carbon atoms or less; Total FAs=total quantity of fatty acids; expression of the ratio (FA<C16)/(Total FAs) as a % of total FAs; milk production=quantity of milk produced in kg of milk/animal and per year; a and b are numerical parameters in which a lies between 10 and 13, and b lies between ?0.40 and ?0.45.