Fitters, Paul F.L. and Griffin, Christine (2004) Spontaneous and induced activity of Heterorhabditis megidis infective juveniles during storage. Nematology, 6. pp. 911-917.
Download (1MB)
|
Abstract
Infective juveniles (IJ) of three Heterorhabditis megidis isolates, HF85, EU17 and UK211, were stored in water at 20C for up to 10 weeks. At 2-week intervals, activity, infectivity, energy reserves and survival were measured. There was no difference between the three isolates in infectivity, which increased significantly over the first 2 weeks and declined gradually thereafter. IJ became inactive during storage. Out of storage, the highest activity was recorded in week 0: nearly all IJ were active within the first minute of observation and remained active for the 20-min observation period.With increasing storage time, an increasing proportion of IJ were inactive in the first minute, reaching 83-96% by week 6. The time taken by 50% of the IJ to become active (AT50) initially increased with nematode age, reaching a maximum of 3-7 min in week 4 or 6 (depending on isolate) but subsequently declined to 2-4 min in week 10. By the time the IJ were becoming more readily activated in weeks 6-8, 75% of the lipid reserves had been depleted, and IJ had started to die. This greater propensity to become active with age may represent a switch to risk-taking behaviour in the face of impending starvation.
Item Type: | Article |
---|---|
Keywords: | activity, entomopathogenic nematode, phased infectivity, starvation, survival. |
Academic Unit: | Faculty of Science and Engineering > Biology |
Item ID: | 315 |
Depositing User: | Dr. Christine Griffin |
Date Deposited: | 08 Sep 2006 |
Journal or Publication Title: | Nematology |
Publisher: | Brill Academic Publishers |
Refereed: | Yes |
URI: | |
Use Licence: | This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here |
Repository Staff Only(login required)
Item control page |
Downloads
Downloads per month over past year