Relationships between maternal engorgement weight and the number, size, and fat content of larval Ixodes scapularis (Acari: Ixodidae)

Journal of Medical Entomology
By: , and 

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Abstract

The relationship between engorgement weight of female Ixodes scapularis Say and characteristics of offspring was studied using field-collected females fed on rabbits in the laboratory. The number of eggs laid was positively related to maternal engorgement weight in one trial, and larval size (estimated by scutal area) was positively related to maternal engorgement weight in the other. These results suggest a trade-off in number of eggs produced versus average size of offspring, possibly determined during late engorgement. The adults for the two trials were collected from different sites in southern Rhode Island and in different seasons (the fall adults were newly emerged, while the spring adults had presumably lived through the winter), so it is not clear whether these results reflect genetic differences or subtle environmental differences between trials. Percent egg hatch and average fat content of larvae were not related to female engorgement weight. We present a modified method to measure lipid content of pooled larval ticks.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Relationships between maternal engorgement weight and the number, size, and fat content of larval Ixodes scapularis (Acari: Ixodidae)
Series title Journal of Medical Entomology
DOI 10.1093/jme/tjw191
Volume 54
Issue 2
Year Published 2017
Language English
Publisher Bernice Pauahi Bishop Museum
Publisher location Honolulu, HI
Contributing office(s) Patuxent Wildlife Research Center
Description 6 p.
First page 275
Last page 280