CONDITION AND FECUNDITY OF THE DAMSELFLY ENALLAGMA-EBRIUM HAGEN THE IMPORTANCE OF ECTOPARASITES
CONDITION AND FECUNDITY OF THE DAMSELFLY ENALLAGMA-EBRIUM HAGEN THE IMPORTANCE OF ECTOPARASITES
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DOI：
10.1007/bf00317598
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发表时间：
1991-01-01
期刊：
影响因子：
--
通讯作者：
BAKER R L
中科院分区：
文献类型：
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作者：
FORBES M R L;BAKER R L
寄生程度与其他已知或怀疑影响寄主适合性的变量(如寄主年龄或体型)之间的自然协变程度、大小和原因尚未得到充分研究。我们证明了幼虫水螨(Arrenurus spp.)的寄生程度。雌蛾Enallagma ebrium(Hagen)雄虫条件降低，幼虫繁殖力下降。我们还证明寄生程度可以随寄主豆娘的年龄和大小而变化。我们解释了这种自然协变的可能原因，我们认为寄生程度、寄主年龄和寄主大小都可以相互作用来决定菊蝇的适合性。我们预计，寄主的表型和寄生程度之间的自然协同变异将经常被观察到。对这种自然协变的研究将有助于研究人员更好地评估几个变量对宿主繁殖成功的重要性，并更好地了解宿主-寄生虫相互作用的动态。
The extent, magnitude, and cause of natural covariation between degree of parasitism and other variables known or suspected of influencing host fitness (such as host age or body size) has been understudied. We demonstrate that degree of parasitism by larval water mites (Arrenurus spp.) was associated with reduced condition of males and with lowered fecundity of young females of the damselfly, Enallagma ebrium (Hagen) (Odonata: Coenagrionidae). We also demonstrate that degree of parasitism can covary with both age and size of host damselflies. We explain the putative causes of such natural covariation, and we suggest that degree of parasitism, host age, and host size can all interact to determine damselfly fitness. We expect that natural covariation between the host's phenotype and degree of parasitism will be frequently observed. Studies of such natural covariation will help researchers to assess better the importance of several variables on host reproductive success and to understand better the dynamics of host-parasite interactions.