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| Web URL(s): | http://ac.els-cdn.com/S0022201194903255/1-s2.0-S00222011943255-main.pdf?_tid=19ad1832-6c50-11e5-b414-00000aab0f6c&acdnat=1444152878_b2591d2d0b5f46d33b791bc3d3419cd1
Last checked: 10/06/2015
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| Publication Type:
| Refereed |
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| Author(s): | Lewis, Edwin E.;
Gaugler, Randy |
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| Author Affiliation: | Department of Entomology, Rutgers University, New Brunswick, New Jersey 08903 |
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| Title: | Entomopathic nematode (Rhabdita: Steinernematidae) sex ratio relates to foraging strategy |
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| Source: | Journal of Invertebrate Pathology. Vol. 64, No. 3, November 1994, p. 238-242. |
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| Publishing Information: | San Diego: Academic Press |
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| # of Pages: | 5 |
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| Keywords: | TIC Keywords: Entomopathogenic nematodes; Steinernema carpocapsae; Steinernema glaseri; Behavior; Life cycle; Sex ratio
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| Abstract/Contents: | "We demonstrate a relationship between the foraging strategies of entomopathogenic nematodes and the pattern of emergence of male and female infective juveniles from their host. We hypothesize that protandry as a mating strategy may be most adaptive in situations where cruising search is employed to find hosts. Alternatively, when attachment to a host is more passive, as in ambush foraging, a more constantly female-biased sex ratio should be maintained. Cruise-foraging infective juvenile Steinernema glaseri that develop into adult males emerge from host cadavers before those that develop into females and are immediately sensitive to volatile host cues. Females that emerge later are less attracted to host volatiles than are males during the first week of the infective stage. However, recently emerged females are strongly attracted to parasitized hosts. Infective juvenile Steinernema carpocapsae showed the opposite trend, with significantly more females emerging on the first day than the later harvest. In most protandrous mating systems, males take the risks of colonizing a new resource. The benefit derived by the early males is to have prolonged access to females inside the new host. Females penetrate into the safer parasitized hosts to find males. Their chances of pre-reproductive death are decreased in two ways; males prepare the host by breaking down defenses, and males make it possible for the females to mate immediately when they reach adulthood. Reported variability between harvests of S. glaseri may be partially attributed to protandry." |
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| Language: | English |
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| References: | 22 |
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| Note: | Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Lewis, E. E., and R. Gaugler. 1994. Entomopathic nematode (Rhabdita: Steinernematidae) sex ratio relates to foraging strategy. J. Invertebr. Pathol. 64(3):p. 238-242. |
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| Web URL(s):
http://ac.els-cdn.com/S0022201194903255/1-s2.0-S00222011943255-main.pdf?_tid=19ad1832-6c50-11e5-b414-00000aab0f6c&acdnat=1444152878_b2591d2d0b5f46d33b791bc3d3419cd1
Last checked: 10/06/2015
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: SB 942 .J6 |
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