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The life cycle of Haemaphysalis qinghaiensis (Acari: Ixodidae) ticks under laboratory conditions

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Abstract

The developmental stages in the life cycle of Haemaphysalis qinghaiensis were investigated under laboratory conditions. The larval, nymphal and adult ticks were fed on sheep at 25–27 °C, 50 % relative humidity (RH) and exposed to daylight. All free-living stages were maintained in an incubator (28 °C with 90 % RH and a 12-h photoperiod). The whole life cycle of H. qinghaiensis was completed in an average of 176 days (range 118–247 days). The average developmental periods were 34.44 days for egg incubation; 5.83, 4.20 and 33.70 days for larval pre-feeding, feeding and pre-molting; and 3.88, 5.30 and 46.50 days for nymphal pre-feeding, feeding and pre-molting. The average times for pre-feeding, feeding, pre-oviposition and oviposition of female adult ticks were 2.60, 11.40, 8.50, and 19.35 days, respectively. The results confirmed the positive correlation between the weight of the engorged female and the egg mass laid (r = 0.557, P < 0.05). The reproductive efficiency index and reproductive fitness index in females were 5.49 and 4.98, respectively. Engorged nymphs moulting to females (4.53 ± 0.16 mg) were significantly heavier (P < 0.001) than those moulting to males (3.45 ± 0.19 mg). The overall sex ratio of the adult ticks was 1:1.1 (M:F).

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Acknowledgments

This study was financially supported by the NSFC (30972182, 30800820, 31072130, 31101621 and 31001061), 948 (2010-S04), Beef and Yak Production System Programme, Specific Fund for Sino-Europe Cooperation, MOST. The research was also facilitated by EPIZONE (FOOD-CT-2006-016236), ASFRISK (211691), ARBOZOONET (211757), and PIROVAC (KBBE-3-245145) of the European Commission, Brussels, Belgium.

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Correspondence to Hong Yin or Jianxun Luo.

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Ma, M., Guan, G., Chen, Z. et al. The life cycle of Haemaphysalis qinghaiensis (Acari: Ixodidae) ticks under laboratory conditions. Exp Appl Acarol 59, 493–500 (2013). https://doi.org/10.1007/s10493-012-9617-y

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  • DOI: https://doi.org/10.1007/s10493-012-9617-y

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