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首页> 外文期刊>Parasitology >Energy expenditure for egg production in arthropod ectoparasites: the effect of host species
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Energy expenditure for egg production in arthropod ectoparasites: the effect of host species

机译：节肢动物外寄生虫卵生产中的能量消耗：寄主物种的影响

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SUMMARY We studied the energy cost of egg production in two flea species (Parapulex chephrenis and Xenopsylla ramesis) feeding on principal (Acomys cahirinus and Meriones crassus, respectively) and auxiliary (M. crassus and A. cahirinus, respectively) rodent hosts. We predicted that fleas feeding on principal as compared with auxiliary hosts will (a) expend less energy for egg production; (b) produce larger eggs and (c) live longer after oviposition. Both fleas produced more eggs and spent less energy per egg when exploiting principal hosts. Parapulex chephrenis produced larger eggs after exploiting auxiliary hosts, while the opposite was true for X. ramesis. After oviposition, P. chephrenis fed on the auxiliary hosts survived for a shorter time than those fed on the principal hosts, while in X. ramesis the survival time did not differ among hosts. Our results suggested that one of the proximate causes for lower reproductive performance and subsequent lower abundance of fleas on auxiliary hosts is the higher energy cost of egg production. However, in some species, lower offspring number may be compensated to some extent by their size, although this compensation may also compromise their future reproduction via decreased survival. In addition, the reproductive strategy of exploitation of low profitable (i.e. auxiliary) hosts may differ between flea species.
机译：小结我们研究了以两种主要跳蚤（Acomys cahirinus和Meriones crassus）和辅助（分别为M. crassus和A. cahirinus）啮齿动物为食的两种跳蚤物种（Parapulex chephrenis和Xenopsylla ramesis）产蛋的能源成本。我们预测，与辅助寄主相比，以跳蚤为食的跳蚤将（a）消耗更少的精力来生产鸡蛋; （b）产卵较大，（c）排卵后寿命更长。在利用主要寄主时，两种跳蚤产生的卵更多，每个卵消耗的能量更少。副产副鸡在利用辅助寄主后产生较大的卵，而对于X. ramesis则相反。产卵后，辅食宿主的P. chephrenis的存活时间比主要宿主喂养的P. chephrenis的存活时间短，而在X. ramesis中，宿主之间的存活时间没有差异。我们的研究结果表明，导致繁殖性能降低以及随后辅助宿主上的跳蚤数量减少的直接原因之一是鸡蛋生产的能源成本较高。然而，在某些物种中，较低的后代数量可以通过其大小得到一定程度的补偿，尽管这种补偿也可能会通过降低生存率而损害其未来的繁殖。另外，在跳蚤物种之间，利用低利润（即辅助）寄主的繁殖策略可能有所不同。

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