Arid
DOI10.1007/s00442-005-0345-4
Ectoparasites and age-dependent survival in a desert rodent
Hawlena, H; Abramsky, Z; Krasnov, BR
通讯作者Hawlena, H
来源期刊OECOLOGIA
ISSN0029-8549
EISSN1432-1939
出版年2006
卷号148期号:1页码:30-39
英文摘要

Host age is one of the key factors in host-parasite relationships as it possibly affects infestation levels, parasite-induced mortality of a host, and parasite distribution among host individuals. We tested two alternative hypotheses about infestation pattern and survival under parasitism in relation to host age. The first hypothesis assumes that parasites are recruited faster than they die and, thus, suggests that adult hosts will show higher infestation levels than juveniles because the former have more time to accumulate parasites. The second hypothesis assumes that parasites die faster than they are recruited and, thus, suggests that adults will show lower infestation levels because of acquired immune response and/or the mortality of heavily infested juveniles and, thus, selection for less infested adults. As the negative effects of parasites on host are often intensity-dependent, we expected that the age-related differences in infestation may be translated to lower or higher survival under parasitism of adults, in the cases of the first and the second hypotheses, respectively. We manipulated ectoparasite numbers using insecticide and assessed the infestation pattern in adult and juvenile gerbils (Gerbillus andersoni) in the Negev Desert. We found only a partial support for age-dependent parasitism. No age-related differences in infestation and distribution among host individuals were found after adjusting the ectoparasite numbers to the host’s surface area. However, age-related differences in survival under parasitism were revealed. The survival probability of parasitized juveniles decreased in about 48% compared to unparasitized hosts while the survival probability of adults was not affected by ectoparasites. Our results suggest that the effect of host age on host-parasite dynamics may not explicitly be determined by age-dependent differences in ectoparasite recruitment or mortality processes but may also be affected by other host-related and parasite-related traits.


英文关键词field manipulation host age infestation parasite distribution
类型Article
语种英语
国家Israel
收录类别SCI-E
WOS记录号WOS:000236968700004
WOS关键词INDUCED HOST MORTALITY ; BODY-SIZE ; LONG-TERM ; GERBILLUS-ALLENBYI ; GROUND-SQUIRRELS ; IMMUNE-RESPONSE ; POPULATION ; CONSEQUENCES ; PARASITISM ; EVOLUTION
WOS类目Ecology
WOS研究方向Environmental Sciences & Ecology
来源机构Ben-Gurion University of the Negev
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/152616
作者单位(1)Ben Gurion Univ Negev, Dept Life Sci, IL-84105 Beer Sheva, Israel;(2)Ben Gurion Univ Negev, Ramon Sci Ctr, Jacob Blaustein Inst Desert Res, IL-84105 Beer Sheva, Israel;(3)Ben Gurion Univ Negev, Mitrani Dept Desert Ecol, Jacob Blaustein Inst Desert Res, IL-80600 Mizpe Ramon, Israel;(4)Ben Gurion Univ Negev, Ramon Sci Ctr, IL-80600 Mizpe Ramon, Israel
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GB/T 7714
Hawlena, H,Abramsky, Z,Krasnov, BR. Ectoparasites and age-dependent survival in a desert rodent[J]. Ben-Gurion University of the Negev,2006,148(1):30-39.
APA Hawlena, H,Abramsky, Z,&Krasnov, BR.(2006).Ectoparasites and age-dependent survival in a desert rodent.OECOLOGIA,148(1),30-39.
MLA Hawlena, H,et al."Ectoparasites and age-dependent survival in a desert rodent".OECOLOGIA 148.1(2006):30-39.
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