Arid
DOI10.1186/s13071-016-1407-7
Time budget, oxygen consumption and body mass responses to parasites in juvenile and adult wild rodents
Garrido, Mario1; Adler, Valeria Hochman2; Pnini, Meital3; Abramsky, Zvika2; Krasnov, Boris R.1; Gutman, Roee4,5,6; Kronfeld-Schor, Noga3; Hawlena, Hadas1,2
通讯作者Hawlena, Hadas
来源期刊PARASITES & VECTORS
ISSN1756-3305
出版年2016
卷号9
英文摘要

Background: The study of changes in a host’s energy allocation in response to parasites is crucial for understanding parasite impact on both individual-and population-level processes. Experimental studies have explored such responses mainly in a single subsample of hosts per study, primarily adult males, and have only assessed either the overall energy acquisition or expenditure, rather than their different components simultaneously, or the behavioral responses. Accordingly, two fundamental questions arise: why have multiple host strategies evolved to cope with increased energy expenditure? and, which factors determine this variation (e.g. host species, identity, age)? This study provides an important step towards addressing both questions by experimentally disentangling the short-term physiological and behavioral responses of juvenile and non-reproductive adult rodents to natural levels of flea infestation. These two cohorts represent extreme cases of the energy demand continuum, as the former, in contrast to the latter, is involved in growth - a highly energy-demanding process - and may not be able to operate far below its upper limit of energy expenditure, and thus should reduce its energy expenses upon the occurrence of extra demands (e.g. due to parasitic pressure). Accordingly, we hypothesized that the response to fleas is age-dependent and varies according to the age-specific energy requirements and constraints.


Methods: We monitored the behavior and physiology of juvenile and non-reproductive adult rodents before and after experimental flea infestation. First, we used a model selection approach to search for the factors that best explained the variability in the time budget, oxygen consumption, and body mass change in response to fleas. Then, using a path analysis approach, we quantified the different pathways connecting the important associations revealed at stage 1.


Results: Compared to their flea-free counterparts, flea-infested adults groomed longer and had a higher oxygen consumption rate, but did not lose body mass. Infested juveniles also groomed longer but grew slower and had a similar rate of oxygen consumption.


Conclusions: Results suggest that both juvenile and adult rodents suffer from natural flea infestation levels. However, the comparison between the responses of juveniles and adults to experimental infestation, also suggests that juveniles may reallocate their energy expenditure from growth to maintenance, while non-reproductive adults increase their energy acquisition. Such age-dependent responses suggest that juveniles may be constrained by their higher need to rest for full functioning or by an upper limit in energy expenditure. Taken together, our study provides experimental evidence that hosts can compensate for the costs incurred by parasitism through physiological and behavioral plasticity, depending on their age, which probably determines their requirements and constraints. These compensatory responses may have important implications for the population dynamics of hosts and their parasites.


英文关键词Body mass Compensatory responses Ectoparasites Energy budget Fleas Host age Metabolic rate Rodents Time budget
类型Article
语种英语
国家Israel
收录类别SCI-E
WOS记录号WOS:000371456100001
WOS关键词MICE PEROMYSCUS-MANICULATUS ; RANGING EASTERN CHIPMUNKS ; BLACK-LEGGED KITTIWAKES ; ARCTIC-BREEDING SEABIRD ; BOT FLY PARASITISM ; ENERGY-EXPENDITURE ; DESERT RODENT ; DEER MICE ; BLUE TITS ; PHYSIOLOGICAL-RESPONSES
WOS类目Parasitology ; Tropical Medicine
WOS研究方向Parasitology ; Tropical Medicine
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/195361
作者单位1.Ben Gurion Univ Negev, Jacob Blaustein Inst Desert Res, Swiss Inst Dryland Environm & Energy Res, Mitrani Dept Desert Ecol, Midreshet Ben Gurion, Israel;
2.Ben Gurion Univ Negev, Dept Life Sci, IL-84105 Beer Sheva, Israel;
3.Tel Aviv Univ, Dept Zool, IL-69978 Tel Aviv, Israel;
4.Tel Hai Coll, Fac Sci & Technol, Dept Anim Sci, Upper Galilee, Israel;
5.Tel Hai Coll, Fac Sci & Technol, Dept Nutr Sci, Upper Galilee, Israel;
6.MIGAL Galilee Res Inst, Lab Human Hlth & Nutr Sci, Unit Integrat Physiol LIP, Kiryat Shmona, Israel
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GB/T 7714
Garrido, Mario,Adler, Valeria Hochman,Pnini, Meital,et al. Time budget, oxygen consumption and body mass responses to parasites in juvenile and adult wild rodents[J],2016,9.
APA Garrido, Mario.,Adler, Valeria Hochman.,Pnini, Meital.,Abramsky, Zvika.,Krasnov, Boris R..,...&Hawlena, Hadas.(2016).Time budget, oxygen consumption and body mass responses to parasites in juvenile and adult wild rodents.PARASITES & VECTORS,9.
MLA Garrido, Mario,et al."Time budget, oxygen consumption and body mass responses to parasites in juvenile and adult wild rodents".PARASITES & VECTORS 9(2016).
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