Endemic to eastern Asia, the Japanese marsh warbler Megalurus pryeri is classified as “vulnerable” in the IUCN Red Data List. Very little information is available concerning the breeding biology of this species. Fro...
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Endemic to eastern Asia, the Japanese marsh warbler Megalurus pryeri is classified as “vulnerable” in the IUCN Red Data List. Very little information is available concerning the breeding biology of this species. From April to July 2004, we studied the breeding ecology of *** sinensis in Zhalong Nature Reserve, in northeastern China. The breeding season extended from late May until early August, with a peak in mid-June. Nest building and care of the young was undertaken primarily by females. Males defended their nesting territories, and drove away male intruders. The eggs of the Japanese marsh warbler are white, with tiny fawn spots (greatest diameter=16.88±0.86 mm,n=14); shortest diameter=12.76±0.51 mm,n=14). Clutch size averaged 5.4±1.2 (range 4-7 eggs, n=38 clutches). Incubation lasted for 10-13 days (Mean=11.9±0.8 days, n=18), with a hatching success of 59.9%. The nestling period (range 9-12 days, Mean 10.1±0.9 days, n=15) resulting in a fledgling success rate of 67.5%. Total breeding success was 41.4%. The main cause of nesting failure include human disturbance (cutting reeds), predation, and effects of grazing and flooding.
为了解东北地区狐源大肠杆菌对磺胺类药物耐药基因的流行情况,本实验共选取狐源大肠杆菌156株,采用PCR技术对磺胺类 sul Ⅰ、 sul Ⅱ和 sul Ⅲ耐药基因进行检测。结果显示:磺胺类药物的耐药基因 sul Ⅰ、 sul Ⅱ和 sul Ⅲ均有检出,分别...
详细信息
为了解东北地区狐源大肠杆菌对磺胺类药物耐药基因的流行情况,本实验共选取狐源大肠杆菌156株,采用PCR技术对磺胺类 sul Ⅰ、 sul Ⅱ和 sul Ⅲ耐药基因进行检测。结果显示:磺胺类药物的耐药基因 sul Ⅰ、 sul Ⅱ和 sul Ⅲ均有检出,分别为19.23%( 30/156 )、44.87%(70/156)、20.51%(32/156)。并且来自不同地区的菌株对磺胺类药物的耐药性存在明显差异。结果表明,东北地区狐源大肠杆菌存在对磺胺类药物的耐药性。
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