Ovarian Follicular Dynamics in Fogera and Jersey Cattle Breeds in Ethiopia

• Autorzy: ,,,, , Jeilu Jemal , Abdi Bedassa , Shelama Kelbessa , Hunduma Dinka
• Języki publikacji: EN

Abstrakty

EN

Understanding the reproductive physiology of female animals is used to optimize reproductive management of dairy cattle. This study was conducted at Adea Berga Dairy Research sub Center of the Ethiopian Institute of Agricultural Research. A total of 15 experimental animals were used to characterize the follicular dynamics of Fogera (n=9) and Jersey (n=6) dairy cattle breeds. Characterization of ovarian follicular dynamics was done using a trans-rectal real-time B-mode ultrasound system for three consecutive estrus cycles; and behavioral estrus signs were visually observed and recorded. Fogera cows manifested two (n=2, 29.62%), three (n=5, 55.55%), and four (n=1, 14%) follicular waves whereas Jersey cows showed two (n=2, 38.9%) and three (n=4, 61.11%) follicular waves. Cycle length or inter ovulatory interval was 20.35 ± 2.8 and 20.67 ± 2.6 days for Fogera and Jersey cows, respectively. The mean number of follicular population per animal was 13.9 ± 5.9 for Fogera and 17.9 ± 7.0 for Jersey cows. There was a significant (p<0.001) difference in follicular number observed between the two breeds. The mean maximum diameter of the ovulatory follicle for Jersey cows was 17.2 ± 0.86 mm and for Fogera 15.22 ± 1.3 mm. There was no statistical difference between the breed in terms of inter-ovulatory interval (IOI), however, there was significant difference (p<0.001) between the breeds in number of follicular population and ovulatory follicle size. In conclusion, behavioral signs of estrus were weaker in fogera breeds as compared to their Jersey counterpart, and relatively higher number of ovarian follicles recorded in Jersey than Fogera cattle breed.

Słowa kluczowe

EN

Dominant follicle; Estrus behavior; Follicular dynamics; Follicular wave; Number of follicular waves

• Wydawca: Scientific Publishing House „DARWIN”
• Czasopismo: World News of Natural Sciences
• Rocznik: 2022
• Tom: 45
• Strony: 103-116

Twórcy

autor

,,,,

• Department of Animal Science, Faculty of Agriculture, Wollega University, P.O. Box 38 Shambu, Ethiopia

autor

Jeilu Jemal

• National Agricultural Biotechnology Research Center, Animal Biotechnology Research Program, P.O. Box 249 Holeta, Ethiopia

autor

Abdi Bedassa

• National Agricultural Biotechnology Research Center, Animal Biotechnology Research Program, P.O. Box 249 Holeta, Ethiopia

autor

Shelama Kelbessa

• National Agricultural Biotechnology Research Center, Animal Biotechnology Research Program, P.O. Box 249 Holeta, Ethiopia

autor

Hunduma Dinka

• Departement of Applied Biology, School of Applied Natural Science, Adama Science and Technology University, P.O. Box 1888 Adama, Ethiopia

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• Typ dokumentu: article