VARIATION OF LH CONCENTRATIONS AROUND MATING TIME AT DIFFERENT AGES OF DROMEDARY SHE-CAMEL

The concentrations of luteinizing hormone (LH) in the blood plasma of the Maghrebi she-camel (Camelus dromedarius ) were measured in many times around mating. The experiment started in November, 2018 and the blood samples collecting were done during January until March. Thirty Maghrebi she-camels according to ages were divided into 3 groups, (G1) 3 - 5
years, (G2) 5 - 10 years and (G3) 10 - 20 years old. From the Jugular vein the blood samples were collected once in the previous day of mating day and in its following day and four times during a mating day. They were timed in the first, second, fourth and eighth hours after mating respectively throughout one estrous cycle for each she-camel. On the day before the
mating day (Db = -1d) the concentration of LH for all groups was at the lowest concentration levels ranging from (0.18-0.53 ng/ml) (Overall mean = 0.37 ± 0.02 ng/ml). In the mating day (Dm = 0d) Concentrations of (LH) began to rise after mating significantly from first to fourth hours, then reduced in eighth hour. The Overall mean of (LH) plasma concentrations were
2.00 ± 0.11; 5.05 ± 0.14; 13.08 ± 0.15 and 9.69 ± 0.13 ng/ml respectively.In a day aftermating (Da = +1d) The (LH) plasma concentrations decreased to the basal concentration. The Overall mean was 0.41 ± 0.02 ng/ml. In the similar times around mating were no observed significant variations plasma hormone concentrations among the three groups