Timing of Ixodes scapularis (Acari: Ixodidae) oviposition and larval activity in southern New York
Timing of Ixodes scapularis (Acari: Ixodidae) oviposition and larval activity in southern New York
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DOI：
10.1093/jmedent/33.1.140
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发表时间：
1996-01-01
影响因子：
2.1
通讯作者：
Fish, D
中科院分区：
文献类型：
--
作者：
Daniels, TJ;Falco, RC;Fish, D
产卵和幼虫羽化的时间为秋季和春季喂养的女性黑腿蜱，肩突硬蜱说，和温度对这些事件的影响，在南部纽约州，莱姆病是地方病，确定在该领域。米氏还研究了幼虫寻找宿主活动的季节性模式，以及越冬、未进食幼虫的存活率。共9只和8只雌性I.肩胛肌分别于1988年秋季和1989年春季释放。对于产卵的10只雌性，无论蜱虫何时进食，产卵都开始于5月中下旬。同样，幼虫羽化同步在7月的所有卵块。微生境温度所经历的女性是不可靠的指标，女性生殖成功，无论是存在或不存在的鸡蛋，或数量的幼虫回收。然而，平均身体大小显着大于那些没有成功产卵的女性。8月下旬至5月上旬的8个月越冬期内，未取食幼虫的存活率为1.9 ~ 31.4%，平均存活率为10.4%。同期拖动采样通过一年表明一个双峰模式的幼虫丰度的特点是一个相对较小的早期活动高峰在5月下旬，延长到7月初。由于幼虫活动的第一个高峰期发生在产卵期间，8周前幼虫羽化的发病，它出现双峰代表活动的2个连续的队列，与早期的高峰组成的越冬幸存者。这些数据意味着从一个地理区域到另一个的繁殖和幼虫活动的时间变化。努力设计一个全面的计划，为生命周期的I。肩胛肌必须考虑到可能存在的人群差异。
Timing of oviposition and larval eclosion for fall- and spring-fed female black-legged tick, Ixodes scapularis Say, and effect of temperature on those events in southern New York state, where Lyme disease is endemic, were determined in the field. Mie also examined seasonal pattern of larval host-seeking activity, as well as rate of survival for overwintering, unfed larvae. Totals of 9 and 8 replete female I. scapularis were released in fall 1988 and spring 1989, respectively. For the 10 females that oviposited, egg laying began in mid-to-late May, regardless of when ticks had fed. Likewise, larval eclosion was synchronized in July for all egg masses. Microhabitat temperatures experienced by females were not reliable indicators of female reproductive success, in terms of either presence or absence of eggs, or numbers of larvae recovered. However, average body size was significantly greater for females that oviposited successfully than for those that did not. The percentage of unfed larvae surviving the 8-mo overwintering period from late August to early May ranged from 1.9 to 31.4, with a mean survival rate of 10.4%. Concurrent drag sampling through the year indicated a bimodal pattern of larval abundance marked by a relatively small early peak of activity in late May that extended into early July. Because the first peak of larval activity occurred during the period of oviposition, 8 wk before onset of larval eclosion, it appears that bimodality represents activity of 2 consecutive cohorts, with the early peak composed of overwintering survivors. These data imply variation in timing of reproduction and larval activity from 1 geographic area to another. Efforts to devise a comprehensive scheme for the life cycle of I. scapularis must consider that population differences may exist.