The life cycle and biological characteristics of Dermacentor silvarum Olenev (Acari: Ixodidae) under field conditions

Yu, Zhijun; Zheng, H.; Chen, Ze; Zheng, Bin; Ma, Hui; Liu, Jingze

doi:10.1016/j.vetpar.2009.11.010

Cited by 27 publications

(20 citation statements)

References 22 publications

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“…The positive correlation (r = 0.909, P \ 0.05) between the weights of engorged H. rufipes females and the number of eggs laid was shown in the present study. Similar relationships were described for other tick species, H. asiaticum kozlovi (Chen et al 2009), H. anatolicum anatolicum (Snow and Arthur 1966), H. aegyptium (Sweatman 1968), Dermacentor silvarum (Yu et al 2010), Haemaphysalis longicornis (Zheng et al 2011), Rhipicephalus bursa (Yeruham et al 2000), R. (Boophilus) microplus (Zhang et al 2006), R. haemaphysaloides haemaphysaloides (Zhang et al 2006) and Amblyomma parvum (Guglielmone et al 1991).…”

Section: Discussionsupporting

confidence: 71%

The life cycle of Hyalomma rufipes (Acari: Ixodidae) under laboratory conditions

Chen

Liu

et al. 2011

Exp Appl Acarol

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Biological characteristics of Hyalomma rufipes parasitising on rabbits and sheep were compared under laboratory conditions in Gansu, China. Mature ticks could parasitize both rabbits and sheep, while immature ticks only fed on rabbits successfully. Adults sucked blood on sheep significantly longer than on rabbits (16 and 13 days, respectively). Other adult parasite characteristics fed on the two hosts were similar, including the weight of engorged adult, female daily oviposition, and the weight and amount of the egg mass laid. Those indicated that this tick species showed little host specificity between sheep and rabbits during its adult stage. In total, the life cycle of H. rufipes was completed in an average period of 179 days. The average developmental periods were 59 days for egg incubation, 3 and 21 days for immature tick prefeeding and feeding, 2, 12 and 40 days for adult prefeeding, female preoviposition and oviposition. The longer female fed for engorgement, the shorter preoviposition period of engorged female needed, although when the feeding period was less than 15 days, this relationship was not obvious. The results confirmed the correlation between the weight of the engorged female and the number of eggs laid (r = 0.909). The reproductive efficiency index (REI) and reproductive fitness index (RFI) in females was 10.63 and 7.22, respectively. Engorged nymphs moulting to females were significantly heavier (27.6 ± 0.89 mg) than those moulting to males (22.3 ± 0.52 mg). Males outnumbered females by 1.4:1.

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Section: Discussionsupporting

confidence: 71%

The life cycle of Hyalomma rufipes (Acari: Ixodidae) under laboratory conditions

Chen

Liu

et al. 2011

Exp Appl Acarol

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“…Assessment of the reproductive characteristics of H. doenitzi found that the weight of engorged females is positively correlated with the number of egg masses laid (r = 0.936, P \ 0.001), which is similar to other tick species such as H. longicornis (Zheng et al 2011), D. silvarum (Yu et al 2010), R. (Boopphilus) microplus (Zhang et al 2006), Hyalomma asiaticum kozlvoi (Chen et al 2009) and H. anatolicum (Ahmed et al 2011).…”

Section: Discussionmentioning

confidence: 56%

Life cycle of Haemaphysalis doenitzi (Acari: Ixodidae) under laboratory conditions and its phylogeny based on mitochondrial 16S rDNA

Chen

Guo

et al. 2011

Exp Appl Acarol

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The paper investigated the life cycle of the hard tick Haemaphysalis doenitzi under laboratory conditions and its phylogeny based on mitochondrial 16S rDNA. The results revealed that the complete life cycle of H. doenitzi requires a mean duration of 109.6 days ranging from 91 to 137 days and the average prefeeding, feeding and premoulting periods of larvae, nymphs and females and the eggs hatching period are 18.7, 26.9, 38.9, and 25.1 days, respectively. In addition, the weight of engorged females is highly correlated with the number of egg masses laid (r = 0.936, P < 0.001). The female reproductive efficiency index and reproductive fitness index are 13.4 and 12.8, respectively. The mean weight of the engorged nymphs (2.77 mg) moulting to females is much higher than those (1.68 mg) moulting to males, which could be used as an index to predict sexes in this species. The ratio of male to female is 1:1.01. Moreover, multisequence alignments and phylogenetic tree constructed based on the mitochondrial 16S rDNA sequences suggest that H. doenitzi is genetically close to H. longicornis.

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“…1), Russia (Kulik & Vinokurova, 1983) and Mongolia (Das et al , 1989), and can cause severe harm to human health and economic loss to livestock production (Teng & Jiang, 1991; Chen et al , 1998). However, previous research on D. silvarum mainly focused on its lifecycle and biological characteristics under standard laboratory conditions (Liu et al , 2005) and it has been studied under field conditions only recently (Yu et al , 2010). Previous studies have suggested that D. silvarum mainly resides in shrubbery and that adults often infest domestic sheep, goats and cattle in the field (Liu et al , 2005; Yin & Luo, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies have suggested that D. silvarum mainly resides in shrubbery and that adults often infest domestic sheep, goats and cattle in the field (Liu et al , 2005; Yin & Luo, 2007). Because of the synchronization of oviposition and larval hatching, this species takes a full year to complete its lifecycle under both laboratory and field conditions (Yu et al , 2010), and a diapause in the feeding and oviposition of females occurs in June (Liu et al , 2005). Seasonal prevalence, simulated in a confined plot, indicates that adults appear from late February to early June, larvae present between June and August, and nymphs are active from August to early September (Yu et al , 2010).…”

Section: Introductionmentioning

confidence: 99%

Seasonal abundance and activity of the tick Dermacentor silvarum in northern China

Zheng

Yang

et al. 2010

Medical and Veterinary Entomology

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Studies on the seasonal abundance and activity of larvae, nymphs and adults of Dermacentor silvarum (Ixodida: Ixodidae), both on and off the host, were carried out over a 2-year period from February 2008 to January 2010 in northern China. During the study period, feeding ticks were removed weekly from domestic sheep and free-living ticks were collected weekly by flag-dragging in four different habitat types. Rodents were captured and inspected for immature ticks from June to September 2008. The results of this study suggest that the ticks mainly reside in shrubs and complete only one generation per year with sequential seasonal distribution and little overlap between the activity of the larvae and nymphs. Adults were most prevalent from late February to late May and peaked in number in mid-April. Larvae were found from early June to early September and peaked in number in mid-July. Nymphs were mainly distributed from late June to late September and peaked in mid-August. Adult and nymphal D. silvarum were found primarily on the ears of sheep, but no larvae were found on sheep. Additionally, an overwintering male adult population was detected on sheep after October, but no free-living adults were found by dragging.

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The life cycle and biological characteristics of Dermacentor silvarum Olenev (Acari: Ixodidae) under field conditions

Cited by 27 publications

References 22 publications

The life cycle of Hyalomma rufipes (Acari: Ixodidae) under laboratory conditions

The life cycle of Hyalomma rufipes (Acari: Ixodidae) under laboratory conditions

Life cycle of Haemaphysalis doenitzi (Acari: Ixodidae) under laboratory conditions and its phylogeny based on mitochondrial 16S rDNA

Seasonal abundance and activity of the tick Dermacentor silvarum in northern China

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