Seasonal variations in the abundance of Gasterophilus spp. larvae in donkeys in northern Jordan
Seasonal variations in the abundance of Gasterophilus spp. larvae in donkeys in northern Jordan
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DOI：
10.1023/a:1012732613902
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发表时间：
2001-12-01
影响因子：
1.7
通讯作者：
Abo-Shehada, M
中科院分区：
文献类型：
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作者：
Mukbel, R;Torgerson, PR;Abo-Shehada, M
在12个月内检查了105头驴是否存在胃蝇属。胃里有幼虫G.和G. nasalis被发现，但有一个明显的季节变化，其丰度。第二阶段幼虫（L-2）的数量在初冬和初夏达到高峰，但在早春和初秋，他们没有或处于低水平。这表明，两种蝇类的成蝇活动都有两个时期（晚秋和晚春）。nasalis和G.好吧第三期幼虫（L-3）全年都有发现，但最低水平出现在夏末和秋季。寄生虫也有聚集分布，这可能是由于寄主选择的苍蝇。幼虫的数量并没有随着年龄的变化显着，这可能是由于缺乏获得性保护性免疫或重复暴露后的耐受性。
One hundred and five donkeys were examined over a 12-month period for the presence of Gasterophilus spp. larvae in their stomachs. G. intestinalis and G. nasalis were found, but there was a distinct seasonal variation in their abundance. The numbers of second-stage larvae (L-2) peaked during the early winter and early summer, but they were absent or at low levels during the early spring and early autumn. This suggests that there are two periods of adult fly activity (late autumn and late spring) for both G. nasalis and G. intestinalis. Third-stage larvae (L-3) were found throughout the year, but the lowest levels were seen in the late summer and autumn. The parasites also had an aggregated distribution, which may be due to host selection by the fly. The numbers of larvae did not vary significantly with age, which may be due to a lack of acquired protective immunity or to tolerance after repeated exposure.