Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/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
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ISSN | 0029-8549 |
EISSN | 1432-1939 |
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 |
推荐引用方式 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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