| Effect of temperature and relative humidity on the life cycle of Ornithodoros (Pavlovskyella) erraticus (Ixodoidea: Argasidae). | |
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MedLine Citation:
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PMID: 3437349 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The effect of different temperatures (18, 22, 28, and 32.5 C, at constant 75% RH) and relative humidities (0, 15, 42, 60, 75, 84, and 92%, at constant 28 C) on the duration of the life cycle of Ornithodoros (Pavlovskyella) erraticus is studied in the laboratory. The egg incubation period is longer at 22 C than at the other temperatures tested; the percentage of hatched eggs was markedly increased at 28 C in comparison with other temperatures (T's) and relative humidities (RH's) tested. At constant 28 C, most larvae (86.2%) are ready to feed within 7.2 days posthatching; they feed for 5-52 min and molt to N1 in 7.8 days postfeeding. Five nymphal instars are recorded. Unfed N1-N5 survived for a longer period at 18 C than at other temperatures, whereas the effect of RH's was insignificant. After feeding, nymphal premolting periods differ from one instar to another and from one T or RH to another. At 28 C, the males emerge from N3, N4, and N5 in 9-15 days postfeeding, while females emerge only from N4 and N5 in 10-16 days. The overall sex ratio (3 male:5 female) is not affected by different T's and RH's. The female and male life spans were longer (means 720 and 500 days, respectively) at 22 C than at other T's and RH's. This study shows that the duration of the life cycle of O. erraticus decreases with rising T and increases with an increase in RH. However, the 28 C and 75% RH seem to be the optimum conditions for this species. |
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Authors:
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S M el Shoura |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Journal of parasitology Volume: 73 ISSN: 0022-3395 ISO Abbreviation: J. Parasitol. Publication Date: 1987 Dec |
Date Detail:
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Created Date: 1988-04-05 Completed Date: 1988-04-05 Revised Date: 2003-11-14 |
Medline Journal Info:
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Nlm Unique ID: 7803124 Medline TA: J Parasitol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 1102-8 Citation Subset: IM |
Affiliation:
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Department of Biology, Sciences and Mathematics Center, Makkah, Saudi Arabia. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Feeding Behavior Female Humidity Larva Male Nymph Oviposition Sex Ratio Temperature Ticks / growth & development*, physiology |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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