Omar, M., Hassan, A. (2019). Monthly, Seasonal Fluctuations and Breeding Season Studies of Cattle Egret, Bubulcus ibis ibis (L.) at Tahta District, Sohag Governorate. Journal of Plant Protection and Pathology, 10(6), 327-330. doi: 10.21608/jppp.2019.48301
M. M. A. Omar; A. A. E. Hassan. "Monthly, Seasonal Fluctuations and Breeding Season Studies of Cattle Egret, Bubulcus ibis ibis (L.) at Tahta District, Sohag Governorate". Journal of Plant Protection and Pathology, 10, 6, 2019, 327-330. doi: 10.21608/jppp.2019.48301
Omar, M., Hassan, A. (2019). 'Monthly, Seasonal Fluctuations and Breeding Season Studies of Cattle Egret, Bubulcus ibis ibis (L.) at Tahta District, Sohag Governorate', Journal of Plant Protection and Pathology, 10(6), pp. 327-330. doi: 10.21608/jppp.2019.48301
Omar, M., Hassan, A. Monthly, Seasonal Fluctuations and Breeding Season Studies of Cattle Egret, Bubulcus ibis ibis (L.) at Tahta District, Sohag Governorate. Journal of Plant Protection and Pathology, 2019; 10(6): 327-330. doi: 10.21608/jppp.2019.48301
Monthly, Seasonal Fluctuations and Breeding Season Studies of Cattle Egret, Bubulcus ibis ibis (L.) at Tahta District, Sohag Governorate
Agric. Zoology and Nematology Dept., Fac. of Agric., Al-Azhar Univ. Assiut branch, Egypt.
Abstract
The highest value of cattle egret birds were in fields nearby water canals during 2014/2015 and 2015/2016, while the lowest value was recorded in fields nearby buildings, field crops and trees. However, the highest value of abundance during March 2015 and April 2014, followed by March 2016 and April 2015, May 2014 and May 2015. While, the lowest value of population abundance of cattle egret were in June, July, August 2014 and August 2015 and January 2015 and 2016, February 2015 and 2016, September 2014 and 2015 and December 2014 and 2015. The highest value of cattle egret in Tahta district was in spring 2014 and 2015 and winter 2015 and 2016. While, the lowest value was recorded in autumn 2014 and 2015. The breeding period of cattle egret was reported to be from January to August,2016. The egg laying pattern of the cattle egret revealed that the time interval between the two successive laying's was approximately 30-36 hours. Cattle egret lays five clutches which extend from 3 to 26 January to 5/August, 2016 breeding season, respectively. Clutch size was recorded to be 1 to 5 eggs, 3 being the commonest and exceptionally 1 during the study period with 60.00% of nests with three eggs, 15.00% with four, 10.00% with two and five eggs and remaining 5.00% with one egg. Minimum of incubation period of Cattle egret birds was (19 days). The maximum incubation period was 22 days during breeding season. Hatchability of egrets differed according to clutch; its value was 70.58% at the first clutch, 73.68% at the second clutch, 72.22% at the third clutch, 69.69% at the fourth clutch, respectively. The lowest percentage of hatching was recoded in fifth clutch (65.52%), during breeding season 2016.
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