PATHOGENICITY OF LARVAL PROTOCALLIPHORA (DIPTERA, CALLIPHORIDAE) PARASITIZING NESTLING BIRDS

被引:70
作者
WHITWORTH, TL [1 ]
BENNETT, GF [1 ]
机构
[1] MEM UNIV NEWFOUNDLAND, INT REFERENCE CTR AVIAN HAEMATOZOA, ST JOHNS A1B 3X9, NEWFOUNDLAND, CANADA
关键词
D O I
10.1139/z92-295
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
Controlled tests showed that feeding by larvae of several species of Protocalliphora lowered haematocrit and haemoglobin levels of nestling magpies and bank swallows. Subsequent studies showed that natural Populations of nestling magpies and Bank Swallows infested by P. asiovora and P. chrysorrhoea, respectively, experienced significantly reduced blood levels at the P0.05 and P0.01 levels except in the youngest nestlings. Despite the presumed heavy blood loss, most nestlings are not killed by larvae of Protocalliphora. Studies of natural populations of Protocalliphora in 48 species of birds indicate that the larval populations are usually too small to kill or seriously injure most nestlings.
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页码:2184 / 2191
页数:8
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